Remove empty lines, useless global initialization

2021-07-26 18:00:40 +02:00 · 2021-07-26 18:00:40 +02:00 · 4eb99fee67
commit 4eb99fee67
parent 52c2b3d015
17 changed files with 25 additions and 994 deletions
--- a/hello_2pads/hello_2pads.c
+++ b/hello_2pads/hello_2pads.c
@ -12,51 +12,33 @@
 #include <libetc.h>
 #include <libgpu.h>
 #include <libapi.h>
 #define VMODE 0                  // Video Mode : 0 : NTSC, 1: PAL
 #define SCREENXRES 320
 #define SCREENYRES 240
 #define CENTERX SCREENXRES/2
 #define CENTERY SCREENYRES/2
 #define MARGINX 32               // margins for text display
 #define MARGINY 32
 #define FONTSIZE 8 * 7           // Text Field Height
 #define OTLEN 8                  // Ordering Table Length 
 DISPENV disp[2];                 // Double buffered DISPENV and DRAWENV
 DRAWENV draw[2];
 u_long ot[2][OTLEN];             // double ordering table of length 8 * 32 = 256 bits / 32 bytes
-
+char primbuff[2][32768];   // double primitive buffer of length 32768 * 8 =  262.144 bits / 32,768 Kbytes
 char primbuff[2][32768] = {1};   // double primitive buffer of length 32768 * 8 =  262.144 bits / 32,768 Kbytes
 char *nextpri = primbuff[0];     // pointer to the next primitive in primbuff. Initially, points to the first bit of primbuff[0]
 short db = 0;                    // index of which buffer is used, values 0, 1
 // Pad stuff
 // Structure for RAW hardware-based light gun position values
 typedef struct
 {
    unsigned short    v_count;      // Y-axis (vertical scan counter)
    unsigned short    h_count;      // H-axis (horizontal pixel clock value)
 } Gun_Position;
 // Structure for storing processed controller data
 typedef struct
 {
    int             xpos, ypos;     // Stored position for sprite(s)
    int             xpos2, ypos2;   // controlled by this controller.
    unsigned char   status;         // These 8 values are obtained
    unsigned char   type;           // directly from the controller
    unsigned char   button1;        // buffer we installed with InitPAD.
@ -66,90 +48,63 @@ typedef struct
    unsigned char   analog2;
    unsigned char   analog3;
 } Controller_Data;
 // All-purpose controller data buffer
 typedef struct
 {
    unsigned char pad[34];          // 8-bytes w/o Multi-Tap, 34-bytes w/Multi-Tap
 } Controller_Buffer;
 Controller_Buffer controllers[2];   // Buffers for reading controllers
 Controller_Data theControllers[8];  // Processed controller data
 void init(void)
 {
    ResetGraph(0);
    SetDefDispEnv(&disp[0], 0, 0, SCREENXRES, SCREENYRES);
    SetDefDispEnv(&disp[1], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[1], 0, 0, SCREENXRES, SCREENYRES);
    if (VMODE)
    {
        SetVideoMode(MODE_PAL);
        disp[0].screen.y += 8;
        disp[1].screen.y += 8;
        }
    SetDispMask(1);                 // Display on screen    
    setRGB0(&draw[0], 50, 50, 50);
    setRGB0(&draw[1], 50, 50, 50);
    draw[0].isbg = 1;
    draw[1].isbg = 1;
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    FntLoad(960, 0);
    FntOpen(MARGINX, SCREENYRES - MARGINY - FONTSIZE, SCREENXRES - MARGINX * 2, FONTSIZE, 0, 280 );
 }
 void display(void)
 {
    DrawSync(0);
    VSync(0);
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    DrawOTag(&ot[db][OTLEN - 1]);
    db = !db;
    nextpri = primbuff[db];
 }
 void get_digital_direction( Controller_Data *c, int buttondata ) // get analog stick values
 {
 int i;
    i = ~(buttondata);
    if( i & 0x80 )
        c->xpos -= 1;
    if( i & 0x20 )
        c->xpos += 1;
    if( i & 0x40 )
        c->ypos += 1;
    if( i & 0x10 )
        c->ypos -= 1;
 }
 void read_controller( Controller_Data *c, unsigned char *buf, int port )  // get the raw values from controller
 {
    register int mouse_x, mouse_y, x;
    register Gun_Position *g;
    c->status =  buf[0];    // Copy over raw controller data
    c->type =    buf[1];
    c->button1 = buf[2];
@ -158,147 +113,97 @@ void read_controller( Controller_Data *c, unsigned char *buf, int port )  // get
    c->analog1 = buf[5];
    c->analog2 = buf[6];
    c->analog3 = buf[7];
    if( buf[0] == 0xff )    // If controller returns BAD status then bail on it.
    {
        c->type = 0;
        return;
    }
    // Look at the controller type code & process controller data as indicated
    switch( c->type )
    {
        case 0x12:      // Sony Mouse
            mouse_x = buf[4];
            mouse_y = buf[5];
            if( mouse_x & 0x80 )
                mouse_x |= 0xffffff80;
            if( mouse_y & 0x80 )
                mouse_y |= 0xffffff80;
            c->xpos += mouse_x;
            c->ypos += mouse_y;
            break;
        case 0x23:      // Namco negCon
                        // Steering wheel
                        // Sankyo Pachinko controler
            get_digital_direction( c, buf[2] );
            break;
        case 0x53:      // Analog 2-stick
            get_digital_direction( c, buf[2] );
            break;
        case 0x41:      // Standard Sony PAD controller
            get_digital_direction( c, buf[2] );
            break;
        default:        // If don't know what it is, treat it like standard controller
            get_digital_direction( c, buf[2] );
            break;
    }
 }
 int main(void)
 {
    TILE * PADL;                    // Tile primitives
    TILE * TRIGGERL;
    TILE * PADR;
    TILE * TRIGGERR;
    TILE * START, * SELECT;
    init();
    InitPAD(controllers[0].pad, 34, controllers[1].pad, 34);
    StartPAD();
    while (1)
    {
        read_controller( &theControllers[0], &controllers[0].pad[0], 0 );  // Read controllers
        read_controller( &theControllers[1], &controllers[1].pad[0], 1 );
        ClearOTagR(ot[db], OTLEN);
        // D-cross
        PADL = (TILE *)nextpri;
        setTile(PADL);
        setRGB0(PADL, 80, 180, 255);        
        setXY0(PADL, CENTERX - 80, CENTERY);
        setWH(PADL, 24, 24);
        addPrim(ot[db], PADL);
        nextpri += sizeof(TILE);
        // L1+L2
        TRIGGERL = (TILE *)nextpri;
        setTile(TRIGGERL);
        setRGB0(TRIGGERL, 255, 0, 0);        
        setXY0(TRIGGERL, CENTERX - 80, CENTERY - 80);
        setWH(TRIGGERL, 24, 24);
        addPrim(ot[db], TRIGGERL);
        nextpri += sizeof(TILE);
        // /\, X, O, [] 
        PADR = (TILE *)nextpri;
        setTile(PADR);
        setRGB0(PADR, 0, 255, 0);        
        setXY0(PADR, CENTERX + 50, CENTERY);
        setWH(PADR, 24, 24);
        addPrim(ot[db], PADR);
        nextpri += sizeof(TILE);
        // R1+R2
        TRIGGERR = (TILE *)nextpri;
        setTile(TRIGGERR);
        setRGB0(TRIGGERR, 255, 0, 255);        
        setXY0(TRIGGERR, CENTERX + 50, CENTERY -80);
        setWH(TRIGGERR, 24, 24);
        addPrim(ot[db], TRIGGERR);
        nextpri += sizeof(TILE);
        // START + SELECT
        START = (TILE *)nextpri;
        setTile(START);
        setRGB0(START, 240, 240, 240);        
        setXY0(START, CENTERX - 16, CENTERY - 36);
        setWH(START, 24, 24);
        addPrim(ot[db], START);
        nextpri += sizeof(TILE);
        // D-pad
        switch(theControllers[0].button1){
            case 0xDF:                      // Right 
                PADL->x0 = CENTERX - 64;
                break;
@ -311,34 +216,25 @@ int main(void)
            case 0xBF:                      // Down  
                PADL->y0 = CENTERY + 16;
                break;
            // Start & Select
            case 0xF7:
                START->w = 32; START->h = 32;START->x0 -= 4;START->y0 -= 4; // START
                break;
            case 0xFE:                                                      // SELECT
                START->r0 = 0;
                break;
            // Dualshock L3 + R3
            case 0xFD:                      // L3
                TRIGGERL->w += 10;
                TRIGGERL->h += 10;
                break;
            case 0xFB:                      //R3
                TRIGGERR->w += 10;
                TRIGGERR->h += 10;
                break;
        }
        // Buttons
        switch(theControllers[0].button2){
            case 0xDF:                      // ⭘
                PADR->x0 = CENTERX + 66;
                break;
@ -351,40 +247,30 @@ int main(void)
            case 0xBF:                      // ╳
                PADR->y0 = CENTERY + 16;
                break;
        // Shoulder buttons             
            case 0xFB:                       // L1
                TRIGGERL->y0 = CENTERY - 64;
                break;
            case 0xFE:                       // L2
                TRIGGERL->y0 = CENTERY - 96;
                break;
            case 0xF7:                       // R1
                TRIGGERR->y0 = CENTERY - 96;
                break;
            case 0xFD:                       // R2
                TRIGGERR->y0 = CENTERY - 64;
                break;
        // Mouse buttons 
            case 0xF4:                      // Mouse Left click
                PADL->w += 10;
                PADL->h += 10;
                break;
            case 0xF8:                      // Mouse Right click
                PADL->w -= 10; 
                PADL->h -= 10; 
                break;
        }
        FntPrint("Hello 2 pads!\n\n");
        FntPrint( "Pad 1 : %02x\nButtons:%02x %02x, Stick:%02x %02x %02x %02x\n",
                    theControllers[0].type,             // Controller type : 00 == none,  41 == standard, 73 == analog/dualshock, 12 == mouse, 23 == steering wheel, 63 == gun, 53 == analog joystick
                    theControllers[0].button1,          // 
@ -393,7 +279,6 @@ int main(void)
                    theControllers[0].analog1,
                    theControllers[0].analog2,
                    theControllers[0].analog3 );
        FntPrint( "Pad 2 : %02x\nButtons:%02x %02x, Stick:%02x %02x %02x %02x\n",
                    theControllers[1].type,             // Controller type : 00 == none,  41 == standard, 73 == analog/dualshock, 12 == mouse, 23 == steering wheel, 63 == gun, 53 == analog joystick
                    theControllers[1].button1,          // 
@ -403,7 +288,6 @@ int main(void)
                    theControllers[1].analog2,          // L3 horizontal
                    theControllers[1].analog3 );        // L3 vertical
        FntFlush(-1);
        display();
        }
    return 0;
--- a/hello_cube/hello_cube.c
+++ b/hello_cube/hello_cube.c
@ -28,7 +28,7 @@
 DISPENV disp[2];
 DRAWENV draw[2];
 u_long      ot[2][OTLEN];                   // Ordering table (contains addresses to primitives)
-char        primbuff[2][PRIMBUFFLEN] = {0}; // Primitive list // That's our prim buffer
+char        primbuff[2][PRIMBUFFLEN]; // Primitive list // That's our prim buffer
 char * nextpri = primbuff[0];                       // Primitive counter
 short           db  = 0;                        // Current buffer counter
 // Prototypes
--- a/hello_light/hello_light.c
+++ b/hello_light/hello_light.c
@ -29,7 +29,7 @@
 DISPENV disp[2];
 DRAWENV draw[2];
 u_long      ot[2][OTLEN];                   // Ordering table (contains addresses to primitives)
-char        primbuff[2][PRIMBUFFLEN] = {0}; // Primitive list // That's our prim buffer
+char        primbuff[2][PRIMBUFFLEN]; // Primitive list // That's our prim buffer
 char * nextpri = primbuff[0];                       // Primitive counter
 short           db  = 0;                        // Current buffer counter
 long    t, p, OTz, Flag;                // t == vertex count, p == depth cueing interpolation value, OTz ==  value to create Z-ordered OT, Flag == see LibOver47.pdf, p.143
@ -65,7 +65,6 @@ MATRIX cmat = {
 // Prototypes
 void init(void);
 void display(void);
 //~ void LoadTexture(u_long * tim, TIM_IMAGE * tparam);
 void init(){
    // Reset the GPU before doing anything and the controller
    PadInit(0);
--- a/hello_multivag/hello_multivag.c
+++ b/hello_multivag/hello_multivag.c
@ -20,44 +20,29 @@
 //            libover47.pdf,  p.271
 //            libref47.pdf,   p.980
 // URLS : http://psx.arthus.net/code/VAG/
 #include <sys/types.h>
 #include <stdio.h>
 #include <libgte.h>
 #include <libetc.h>
 #include <libgpu.h>
 // Sound system
 #include <libsnd.h>
 #include <libspu.h>
 #define VMODE 0                 // Video Mode : 0 : NTSC, 1: PAL
 #define SCREENXRES 320
 #define SCREENYRES 240
 #define CENTERX SCREENXRES/2
 #define CENTERY SCREENYRES/2
 #define MARGINX 0               // margins for text display
 #define MARGINY 32
 #define FONTSIZE 8 * 7          // Text Field Height
 DISPENV disp[2];                // Double buffered DISPENV and DRAWENV
 DRAWENV draw[2];
 short db = 0;                   // index of which buffer is used, values 0, 1
 // Sound stuff
 #define MALLOC_MAX 3            // Max number of time we can call SpuMalloc
 //~ // convert Little endian to Big endian
 #define SWAP_ENDIAN32(x) (((x)>>24) | (((x)>>8) & 0xFF00) | (((x)<<8) & 0x00FF0000) | ((x)<<24))
 typedef struct VAGheader{       // All the values in this header must be big endian
        char id[4];             // VAGp         4 bytes -> 1 char * 4
        unsigned int version;          // 4 bytes
@ -68,123 +53,82 @@ typedef struct VAGheader{       // All the values in this header must be big end
        char  name[16];         // 16 bytes -> 1 char * 16
        // Waveform data after that
 }VAGhdr;
 SpuCommonAttr commonAttributes;          // structure for changing common voice attributes
 SpuVoiceAttr  voiceAttributes ;          // structure for changing individual voice attributes
 u_long hello_spu_address;                  // address allocated in memory for first sound file
 u_long poly_spu_address;                 // address allocated in memory for second sound file
 // DEBUG : these allow printing values for debugging
 u_long hello_spu_start_address;                
 u_long hello_get_start_addr;
 u_long hello_transSize;                            
 u_long poly_spu_start_address;                
 u_long poly_get_start_addr;
 u_long poly_transSize;                            
 #define HELLO SPU_0CH                   // Play first vag on channel 0
 #define POLY SPU_2CH                    // Play second vag on channel 2
 // Memory management table ; allow MALLOC_MAX calls to SpuMalloc() - ibref47.pdf p.1044
 char spu_malloc_rec[SPU_MALLOC_RECSIZ * (2 + MALLOC_MAX+1)]; 
 // VAG files
 // We're using GrumpyCoder's Nugget wrapper to compile the code with a modern GCC : https://github.com/grumpycoders/pcsx-redux/tree/main/src/mips/psyq
 // To include binary files in the exe, add your VAG files to the SRCS variable in Makefile
 // and in common.mk, add this rule to include *.vag files :
 //
 //~ %.o: %.vag
    //~ $(PREFIX)-objcopy -I binary --set-section-alignment .data=4 --rename-section .data=.rodata,alloc,load,readonly,data,contents -O elf32-tradlittlemips -B mips $< $@
 // hello.vag - 44100 Khz
 extern unsigned char _binary____VAG_hello_vag_start[]; // filename must begin with _binary____ followed by the full path, with . and / replaced, and then suffixed with _ and end with _start[]; or end[];
 extern unsigned char _binary____VAG_hello_vag_end[];   // https://discord.com/channels/642647820683444236/663664210525290507/780866265077383189
 // poly.vag - 44100 Khz
 extern unsigned char _binary____VAG_poly_vag_start[];
 extern unsigned char _binary____VAG_poly_vag_end[];
 void initGraph(void)
 {
    ResetGraph(0);
    SetDefDispEnv(&disp[0], 0, 0, SCREENXRES, SCREENYRES);
    SetDefDispEnv(&disp[1], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[1], 0, 0, SCREENXRES, SCREENYRES);
    if (VMODE)
    {
        SetVideoMode(MODE_PAL);
        disp[0].screen.y += 8;
        disp[1].screen.y += 8;
        }
    SetDispMask(1);                 // Display on screen    
    setRGB0(&draw[0], 50, 50, 50);
    setRGB0(&draw[1], 50, 50, 50);
    draw[0].isbg = 1;
    draw[1].isbg = 1;
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    FntLoad(960, 0);
    FntOpen(8, 60, 304, 200, 0, 500 );
 }
 void display(void)
 {
    DrawSync(0);
    VSync(0);
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    db = !db;
 }
 // Audio initialisation & functions
 void initSnd(void){
    SpuInitMalloc(MALLOC_MAX, spu_malloc_rec);                      // Maximum number of blocks, mem. management table address.
    commonAttributes.mask = (SPU_COMMON_MVOLL | SPU_COMMON_MVOLR);  // Mask which attributes to set
    commonAttributes.mvol.left  = 0x3fff;                           // Master volume left
    commonAttributes.mvol.right = 0x3fff;                           // see libref47.pdf, p.1058
    SpuSetCommonAttr(&commonAttributes);                            // set attributes
    SpuSetIRQ(SPU_OFF);
 }
 u_long sendVAGtoRAM(unsigned int VAG_data_size, unsigned char *VAG_data){
    u_long size;
    SpuSetTransferMode(SpuTransByDMA);                              // DMA transfer; can do other processing during transfer
    size = SpuWrite (VAG_data + sizeof(VAGhdr), VAG_data_size);     // transfer VAG_data_size bytes from VAG_data  address to sound buffer
    SpuIsTransferCompleted (SPU_TRANSFER_WAIT);                     // Checks whether transfer is completed and waits for completion
    return size;
 }
 void setVoiceAttr(unsigned int pitch, long channel, unsigned long soundAddr ){
    voiceAttributes.mask=                                   //~ Attributes (bit string, 1 bit per attribute)
    (
      SPU_VOICE_VOLL |
@ -200,84 +144,53 @@ void setVoiceAttr(unsigned int pitch, long channel, unsigned long soundAddr ){
      SPU_VOICE_ADSR_RR |
      SPU_VOICE_ADSR_SL
    );
    voiceAttributes.voice        = channel;                 //~ Voice (low 24 bits are a bit string, 1 bit per voice )
    voiceAttributes.volume.left  = 0x1000;                  //~ Volume 
    voiceAttributes.volume.right = 0x1000;                  //~ Volume
    voiceAttributes.pitch        = pitch;                   //~ Interval (set pitch)
    voiceAttributes.addr         = soundAddr;               //~ Waveform data start address
    voiceAttributes.a_mode       = SPU_VOICE_LINEARIncN;    //~ Attack rate mode  = Linear Increase - see libref47.pdf p.1091
    voiceAttributes.s_mode       = SPU_VOICE_LINEARIncN;    //~ Sustain rate mode = Linear Increase
    voiceAttributes.r_mode       = SPU_VOICE_LINEARDecN;    //~ Release rate mode = Linear Decrease
    voiceAttributes.ar           = 0x0;                     //~ Attack rate
    voiceAttributes.dr           = 0x0;                     //~ Decay rate
    voiceAttributes.rr           = 0x0;                     //~ Release rate
    voiceAttributes.sr           = 0x0;                     //~ Sustain rate
    voiceAttributes.sl           = 0xf;                     //~ Sustain level
    SpuSetVoiceAttr(&voiceAttributes);                      // set attributes
 }
 void playSFX(unsigned long fx){
    SpuSetKey(SpuOn, fx); 
 }
 int main(void)
 {
    short counter = 0;
    const VAGhdr * HellofileHeader = (VAGhdr *) _binary____VAG_hello_vag_start;   // get header of first VAG file
    const VAGhdr * PolyfileHeader = (VAGhdr *) _binary____VAG_poly_vag_start;   // get header of second VAG file
    // From libover47.pdf :
    // The sampling frequency of the original audio file can be used to determine the pitch
    // at which to play the VAG. pitch = (sampling frequency << 12)/44100L 
    // Ex: 44.1kHz=0x1000 22.05kHz=0x800 etc
    unsigned int Hellopitch =   (SWAP_ENDIAN32(HellofileHeader->samplingFrequency) << 12) / 44100L; 
    unsigned int Polypitch =   (SWAP_ENDIAN32(PolyfileHeader->samplingFrequency) << 12) / 44100L; 
    SpuInit();                                                                            // Initialize SPU. Called only once.
    initSnd();
    // First VAG
    hello_spu_address   = SpuMalloc(SWAP_ENDIAN32(HellofileHeader->dataSize));                // Allocate an area of dataSize bytes in the sound buffer. 
    hello_spu_start_address = SpuSetTransferStartAddr(hello_spu_address);                         // Sets a starting address in the sound buffer
    hello_get_start_addr    = SpuGetTransferStartAddr();                                        // SpuGetTransferStartAddr() returns current sound buffer transfer start address.
    hello_transSize         = sendVAGtoRAM(SWAP_ENDIAN32(HellofileHeader->dataSize), _binary____VAG_hello_vag_start);
     // First VAG
    poly_spu_address   = SpuMalloc(SWAP_ENDIAN32(PolyfileHeader->dataSize));                // Allocate an area of dataSize bytes in the sound buffer. 
    poly_spu_start_address = SpuSetTransferStartAddr(poly_spu_address);                         // Sets a starting address in the sound buffer
    poly_get_start_addr    = SpuGetTransferStartAddr();                                        // SpuGetTransferStartAddr() returns current sound buffer transfer start address.
    poly_transSize         = sendVAGtoRAM(SWAP_ENDIAN32(PolyfileHeader->dataSize), _binary____VAG_poly_vag_start);
    // set VAG to channel 
    setVoiceAttr(Hellopitch, HELLO, hello_spu_address); // SPU_0CH == hello
    setVoiceAttr(Polypitch, POLY, poly_spu_address);  // SPU_2CH == poly
    initGraph();
    while (1)
    {
        if(!counter){
            playSFX(HELLO);     // Play first VAG
            counter = 240;
@ -288,8 +201,6 @@ int main(void)
        if(counter == 80){
            playSFX(HELLO|POLY); // Play both VAGs simultaneously
        }
        FntPrint("First VAG:");
        FntPrint("\nPitch             : %08x-%dKhz", Hellopitch, (SWAP_ENDIAN32(HellofileHeader->samplingFrequency)) );
        FntPrint("\nSet Start addr    : %08x", hello_spu_address);
@ -297,7 +208,6 @@ int main(void)
        FntPrint("\nGet Start  addr   : %08x", hello_get_start_addr);  
        FntPrint("\nSend size         : %08x", SWAP_ENDIAN32(HellofileHeader->dataSize));  
        FntPrint("\nReturn size       : %08x\n", hello_transSize);  
        FntPrint("\nSecond VAG:");
        FntPrint("\nPitch             : %08x-%dKhz", Polypitch, (SWAP_ENDIAN32(HellofileHeader->samplingFrequency)) );
        FntPrint("\nSet Start addr    : %08x", poly_spu_address);
@ -305,16 +215,10 @@ int main(void)
        FntPrint("\nGet Start  addr   : %08x", poly_get_start_addr);  
        FntPrint("\nSend size         : %08x", SWAP_ENDIAN32(PolyfileHeader->dataSize));  
        FntPrint("\nReturn size       : %08x\n", poly_transSize);  
        FntPrint("\nCounter       : %d\n", counter);  
        FntFlush(-1);
        counter --;
        display();
    }
    return 0;
    }
--- a/hello_pad/hello_pad.c
+++ b/hello_pad/hello_pad.c
@ -8,43 +8,28 @@
 #include <libgte.h>
 #include <libetc.h>
 #include <libgpu.h>
 #define VMODE 0         // Video Mode : 0 : NTSC, 1: PAL
 #define SCREENXRES 320
 #define SCREENYRES 240
 #define CENTERX SCREENXRES/2
 #define CENTERY SCREENYRES/2
 #define MARGINX 32               // margins for text display
 #define MARGINY 32
 #define FONTSIZE 8 * 2           // Text Field Height
 #define OTLEN 8                  // Ordering Table Length 
 DISPENV disp[2];                 // Double buffered DISPENV and DRAWENV
 DRAWENV draw[2];
 u_long ot[2][OTLEN];             // double ordering table of length 8 * 32 = 256 bits / 32 bytes
-
+char primbuff[2][32768];   // double primitive buffer of length 32768 * 8 =  262.144 bits / 32,768 Kbytes
 char primbuff[2][32768] = {1};   // double primitive buffer of length 32768 * 8 =  262.144 bits / 32,768 Kbytes
 char *nextpri = primbuff[0];     // pointer to the next primitive in primbuff. Initially, points to the first bit of primbuff[0]
 short db = 0;                    // index of which buffer is used, values 0, 1
 void init(void)
 {
    ResetGraph(0);
    SetDefDispEnv(&disp[0], 0, 0, SCREENXRES, SCREENYRES);
    SetDefDispEnv(&disp[1], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[1], 0, 0, SCREENXRES, SCREENYRES);
    if (VMODE)
    {
        SetVideoMode(MODE_PAL);
@ -52,160 +37,101 @@ void init(void)
        disp[1].screen.y += 8;
        }
    SetDispMask(1);                 // Display on screen    
    setRGB0(&draw[0], 50, 50, 50);
    setRGB0(&draw[1], 50, 50, 50);
    draw[0].isbg = 1;
    draw[1].isbg = 1;
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    FntLoad(960, 0);
    FntOpen(MARGINX, SCREENYRES - MARGINY - FONTSIZE, SCREENXRES - MARGINX * 2, FONTSIZE, 0, 280 );
 }
 void display(void)
 {
    DrawSync(0);
    VSync(0);
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    DrawOTag(&ot[db][OTLEN - 1]);
    db = !db;
    nextpri = primbuff[db];
 }
 int main(void)
 {
    TILE * PADL;                    // Tile primitives
    TILE * TRIGGERL;
    TILE * PADR;
    TILE * TRIGGERR;
    TILE * START, * SELECT;
    int pad = 0;                    
    init();
    PadInit(0);                     // Initialize pad.  Mode is always 0
    while (1)
    {
        ClearOTagR(ot[db], OTLEN);
        // D-cross
        PADL = (TILE *)nextpri;
        setTile(PADL);
        setRGB0(PADL, 0, 0, 255);        
        setXY0(PADL, CENTERX - 80, CENTERY);
        setWH(PADL, 24, 24);
        addPrim(ot[db], PADL);
        nextpri += sizeof(TILE);
        // L1+L2
        TRIGGERL = (TILE *)nextpri;
        setTile(TRIGGERL);
        setRGB0(TRIGGERL, 255, 0, 0);        
        setXY0(TRIGGERL, CENTERX - 80, CENTERY - 80);
        setWH(TRIGGERL, 24, 24);
        addPrim(ot[db], TRIGGERL);
        nextpri += sizeof(TILE);
        // /\, X, O, [] 
        PADR = (TILE *)nextpri;
        setTile(PADR);
        setRGB0(PADR, 0, 255, 0);        
        setXY0(PADR, CENTERX + 50, CENTERY);
        setWH(PADR, 24, 24);
        addPrim(ot[db], PADR);
        nextpri += sizeof(TILE);
        // R1+R2
        TRIGGERR = (TILE *)nextpri;
        setTile(TRIGGERR);
        setRGB0(TRIGGERR, 255, 0, 255);        
        setXY0(TRIGGERR, CENTERX + 50, CENTERY -80);
        setWH(TRIGGERR, 24, 24);
        addPrim(ot[db], TRIGGERR);
        nextpri += sizeof(TILE);
        // START + SELECT
        START = (TILE *)nextpri;
        setTile(START);
        setRGB0(START, 240, 240, 240);        
        setXY0(START, CENTERX - 16, CENTERY - 36);
        setWH(START, 24, 24);
        addPrim(ot[db], START);
        nextpri += sizeof(TILE);
        // Pad stuff
        pad = PadRead(0);                             // Read pads input. id is unused, always 0.
                                                      // PadRead() returns a 32 bit value, where input from pad 1 is stored in the low 2 bytes and input from pad 2 is stored in the high 2 bytes. (https://matiaslavik.wordpress.com/2015/02/13/diving-into-psx-development/)
        // D-pad        
        if(pad & PADLup)   {PADL->y0 = CENTERY - 16;} // 🡩           // To access pad 2, use ( pad >> 16 & PADLup)...
        if(pad & PADLdown) {PADL->y0 = CENTERY + 16;} // 🡫
        if(pad & PADLright){PADL->x0 = CENTERX - 64;} // 🡪
        if(pad & PADLleft) {PADL->x0 = CENTERX - 96;} // 🡨
        // Buttons
        if(pad & PADRup)   {PADR->y0 = CENTERY - 16;} //   △
        if(pad & PADRdown) {PADR->y0 = CENTERY + 16;} // ╳
        if(pad & PADRright){PADR->x0 = CENTERX + 66;} //   ⭘
        if(pad & PADRleft) {PADR->x0 = CENTERX + 34;} // ⬜
        // Shoulder buttons
        if(pad & PADL1){TRIGGERL->y0 = CENTERY - 64;} // L1
        if(pad & PADL2){TRIGGERL->y0 = CENTERY - 96;} // L2
        if(pad & PADR1){TRIGGERR->y0 = CENTERY - 64;} // R1
        if(pad & PADR2){TRIGGERR->y0 = CENTERY - 96;} // R2
        // Start & Select
        if(pad & PADstart){START->w = 32; START->h = 32;START->x0 -= 4;START->y0 -= 4;} // START
        if(pad & PADselect){START->r0 = 0;}                                             // SELECT
        FntPrint("Hello Pad!");
        FntFlush(-1);
        display();
        }
    return 0;
--- a/hello_poly/hello_poly.c
+++ b/hello_poly/hello_poly.c
@ -4,182 +4,109 @@
 // 
 // From ../psyq/addons/graphics/MESH/RMESH/TUTO0.C :
 // Schnappy 2021
 #include <sys/types.h>
 #include <stdio.h>
 #include <libgte.h>
 #include <libetc.h>
 #include <libgpu.h>
 #include <libapi.h>
 #define VMODE 0                 // Video Mode : 0 : NTSC, 1: PAL
 #define SCREENXRES 320          // Screen width
 #define SCREENYRES 240          // Screen height
 #define CENTERX SCREENXRES/2    // Center of screen on x 
 #define CENTERY SCREENYRES/2    // Center of screen on y
 #define MARGINX 0                // margins for text display
 #define MARGINY 32
 #define FONTSIZE 8 * 7             // Text Field Height
 #define OTLEN 8                    // Ordering Table Length 
 DISPENV disp[2];                   // Double buffered DISPENV and DRAWENV
 DRAWENV draw[2];
 u_long ot[2][OTLEN];               // double ordering table of length 8 * 32 = 256 bits / 32 bytes
 char primbuff[2][32768];     // double primitive buffer of length 32768 * 8 =  262.144 bits / 32,768 Kbytes
 char *nextpri = primbuff[0];       // pointer to the next primitive in primbuff. Initially, points to the first bit of primbuff[0]
 short db = 0;                      // index of which buffer is used, values 0, 1
 MATRIX identity(int num)           // generate num x num matrix 
 {
   int row, col;
   MATRIX matrix;
   for (row = 0; row < num; row++)
   {
      for (col = 0; col < num; col++)
      {
         if (row == col)
            matrix.m[row][col] = 4096;
         else
            matrix.m[row][col] = 0;
      }
   }
   return matrix;
 }
 void init(void)
 {
    ResetGraph(0);
    // Initialize and setup the GTE
    InitGeom();
    SetGeomOffset(CENTERX,CENTERY);
    SetGeomScreen(CENTERX);
    SetDefDispEnv(&disp[0], 0, 0, SCREENXRES, SCREENYRES);
    SetDefDispEnv(&disp[1], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[1], 0, 0, SCREENXRES, SCREENYRES);
-    
+    if (VMODE) {
    if (VMODE)
    {
        SetVideoMode(MODE_PAL);
-        disp[0].screen.y += 8;
+        disp[0].disp.y = disp[1].disp.y = 8;
        disp[1].screen.y += 8;
    }
-    SetDispMask(1);                 // Display on screen    
+    SetDispMask(1);                 
    setRGB0(&draw[0], 50, 50, 50);
    setRGB0(&draw[1], 50, 50, 50);
    draw[0].isbg = 1;
    draw[1].isbg = 1;
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    FntLoad(960, 0);
    FntOpen(MARGINX, SCREENYRES - MARGINY - FONTSIZE, SCREENXRES - MARGINX * 2, FONTSIZE, 0, 280 );
 }
 void display(void)
 {
    DrawSync(0);
    VSync(0);
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    DrawOTag(&ot[db][OTLEN - 1]);
    db = !db;
    nextpri = primbuff[db];
 }
 int main(void)
 {
    MATRIX IDMATRIX = identity(3);                  // Generate 3x3 identity matrix
    POLY_F4 *poly = {0};                            // pointer to a POLY_F4 
    SVECTOR RotVector = {0, 0, 0};                  // Initialize rotation vector {x, y, z}
    VECTOR  MovVector = {0, 0, CENTERX, 0};         // Initialize translation vector {x, y, z}
    VECTOR  ScaleVector ={ONE, ONE, ONE};           // ONE is define as 4096 in libgte.h
    SVECTOR VertPos[4] = {                          // Set initial vertices position relative to 0,0 - see here : https://psx.arthus.net/docs/poly_f4.jpg
            {-32, -32, 1 },                         // Vert 1 
            {-32,  32, 1 },                         // Vert 2
            { 32, -32, 1 },                         // Vert 3
            { 32,  32, 1  }                         // Vert 4
        };                                          
-    MATRIX PolyMatrix = IDMATRIX;                   
+    MATRIX PolyMatrix = {0};                   
    long polydepth;
    long polyflag;
    long OTz;
    init();
    while (1)
    {
        ClearOTagR(ot[db], OTLEN);
        poly = (POLY_F4 *)nextpri;                    // Set poly to point to  the address of the next primitiv in the buffer
        // Set transform matrices for this polygon
        RotMatrix(&RotVector, &PolyMatrix);           // Apply rotation matrix
        TransMatrix(&PolyMatrix, &MovVector);
        ScaleMatrix(&PolyMatrix, &ScaleVector);         // Apply translation matrix   
        SetRotMatrix(&PolyMatrix);                    // Set default rotation matrix
        SetTransMatrix(&PolyMatrix);                  // Set default transformation matrix
        setPolyF4(poly);                              // Initialize poly as a POLY_F4 
        setRGB0(poly, 255, 0, 255);                   // Set poly color
-
+        // RotTransPers using 4 calls
        // RotTransPers
        //~ OTz = RotTransPers(&VertPos[0], (long*)&poly->x0, &polydepth, &polyflag);
        //~ RotTransPers(&VertPos[1], (long*)&poly->x1, &polydepth, &polyflag);
        //~ RotTransPers(&VertPos[2], (long*)&poly->x2, &polydepth, &polyflag);
        //~ RotTransPers(&VertPos[3], (long*)&poly->x3, &polydepth, &polyflag);
        // RotTransPers4 equivalent 
        OTz = RotTransPers4(
                    &VertPos[0],      &VertPos[1],      &VertPos[2],      &VertPos[3],
                    (long*)&poly->x0, (long*)&poly->x1, (long*)&poly->x2, (long*)&poly->x3,
                    &polydepth,
                    &polyflag
                    );                                // Perform coordinate and perspective transformation for 4 vertices
        RotVector.vy += 4;
        RotVector.vz += 4;                              // Apply rotation on Z-axis. On PSX, the Z-axis is pointing away from the screen.  
        addPrim(ot[db], poly);                         // add poly to the Ordering table
        nextpri += sizeof(POLY_F4);                    // increment nextpri address with size of a POLY_F4 struct 
        FntPrint("Hello Poly !");                   
        FntFlush(-1);
        display();
        }
    return 0;
--- a/hello_poly_ft/hello_poly_ft.c
+++ b/hello_poly_ft/hello_poly_ft.c
@ -43,26 +43,6 @@ extern unsigned long _binary____TIM_bousai_tim_end[];
 extern unsigned long _binary____TIM_bousai_tim_length;
 TIM_IMAGE bousai;
 MATRIX identity(int num)           // generate num x num matrix 
 {
   int row, col;
   MATRIX matrix;
   for (row = 0; row < num; row++)
   {
      for (col = 0; col < num; col++)
      {
         if (row == col)
            matrix.m[row][col] = 4096;
         else
            matrix.m[row][col] = 0;
      }
   }
   return matrix;
 }
 void LoadTexture(u_long * tim, TIM_IMAGE * tparam){     // This part is from Lameguy64's tutorial series : lameguy64.net/svn/pstutorials/chapter1/3-textures.html login/pw: annoyingmous
        OpenTIM(tim);                                   // Open the tim binary data, feed it the address of the data in memory
        ReadTIM(tparam);                                // This read the header of the TIM data and sets the corresponding members of the TIM_IMAGE structure
@ -133,8 +113,6 @@ void display(void)
 int main(void)
 {
    MATRIX IDMATRIX = identity(3);                  // Generate 3x3 identity matrix
    POLY_FT4 *poly = {0};                           // pointer to a POLY_G4 
    SVECTOR RotVector = {0, 0, 0};                  // Initialize rotation vector {x, y, z}
    VECTOR  MovVector = {0, 0, CENTERX/2, 0};               // Initialize translation vector {x, y, z, pad}
@ -146,7 +124,7 @@ int main(void)
            { 32, -32, 1 },                         // Vert 3
            { 32,  32, 1  }                         // Vert 4
        };                                          
-    MATRIX PolyMatrix = IDMATRIX;                   
+    MATRIX PolyMatrix = {0};                   
    long polydepth;
    long polyflag;
--- a/hello_poly_fun/hello_poly_fun.c
+++ b/hello_poly_fun/hello_poly_fun.c
@ -2,51 +2,35 @@
 // Credits : Schnappy
 //With great help from Jaby smoll Seamonstah, Nicolas Noble, NDR008, paul, sickle on https://discord.com/invite/Zd82yXvs
 // 11/2020
 #include <sys/types.h>
 #include <stdio.h>
 #include <libgte.h>
 #include <libetc.h>
 #include <libgpu.h>
 #include <kernel.h>
 #define VMODE 0         // Video Mode : 0 : NTSC, 1: PAL
 #define SPIN 16         // Rotation speed increment
 #define SCREENXRES 320
 #define SCREENYRES 240
 #define CENTERX SCREENXRES/2
 #define CENTERY SCREENYRES/2
 #define MARGINX 10    // margins for text display
 #define MARGINY 4
 #define FONTSIZE 8 * 7           // Text Field Height
 #define OTLEN 16              // Ordering Table Length 
 DISPENV disp[2];             // Double buffered DISPENV and DRAWENV
 DRAWENV draw[2];
 u_long ot[2][OTLEN];     // double ordering table of length 8 * 32 = 256 bits / 32 bytes
 char primbuff[2][32768];     // double primitive buffer of length 32768 * 8 =  262.144 bits / 32,768 Kbytes
 char *nextpri = primbuff[0]; // pointer to the next primitive in primbuff. Initially, points to the first bit of primbuff[0]
 short db = 0;                // index of which buffer is used, values 0, 1
 CVECTOR BgColor[3] = {20, 20, 20}; 
 struct polygon
    { 
    POLY_F4 * poly_f4;
    CVECTOR   color;
    short     width;
    short     height;
    //~ VECTOR    PosV_L; // Not used anymore
    SVECTOR   RotV_L;
    VECTOR    TransV_L;
    VECTOR    ScaleV_L;
@ -58,25 +42,18 @@ struct polygon
    short     rotSpeed;
    int       otz;
    };
 void init(void)
 {
    ResetGraph(0);
    // Initialize and setup the GTE : Not needed ?
    InitGeom();
    SetGeomOffset(CENTERX,CENTERY);
    SetGeomScreen(CENTERX);
    PadInit(0);
    SetDefDispEnv(&disp[0], 0, 0, SCREENXRES, SCREENYRES);
    SetDefDispEnv(&disp[1], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[1], 0, 0, SCREENXRES, SCREENYRES);
    if (VMODE)
    {
        SetVideoMode(MODE_PAL);
@ -84,92 +61,47 @@ void init(void)
        disp[1].screen.y += 8;
    }
    SetDispMask(1);                 // Display on screen    
    setRGB0(&draw[0], BgColor->r, BgColor->g, BgColor->b);
    setRGB0(&draw[1], BgColor->r, BgColor->g, BgColor->b);
    draw[0].isbg = 1;
    draw[1].isbg = 1;
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    FntLoad(960, 0);
    FntOpen(MARGINX, SCREENYRES - MARGINY - FONTSIZE, SCREENXRES - MARGINX * 2, FONTSIZE, 0, 280 );
 }
 void display(void)
 {
    DrawSync(0);
    VSync(0);
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    DrawOTag(&ot[db][OTLEN - 1]);
    db = !db;
    nextpri = primbuff[db];
 }
 void pivotPoint(SVECTOR VertPos[3],short width,short height, SVECTOR pivot){
        // Not very efficient I think
        VertPos[0].vx = -pivot.vx;
        VertPos[0].vy = -pivot.vy;
        VertPos[0].vz = 1;
        VertPos[1].vx = width - pivot.vx;
        VertPos[1].vy = -pivot.vy;
        VertPos[1].vz = 1;
        VertPos[2].vx = -pivot.vx;
        VertPos[2].vy = height-pivot.vy;
        VertPos[2].vz = 1;
        VertPos[3].vx = width  - pivot.vx;
        VertPos[3].vy = height - pivot.vy;
        VertPos[3].vz = 1;
 }
 MATRIX identity(int num)
 {
   int row, col;
   MATRIX matrix;
   for (row = 0; row < num; row++)
   {
      for (col = 0; col < num; col++)
      {
         if (row == col)
            matrix.m[row][col] = 4096;
         else
            matrix.m[row][col] = 0;
      }
   }
   return matrix;
 }
 int main(void)
 {
    MATRIX IDMATRIX = identity(3);
    u_short BtnTimer = 0;           // Timer to limit pad input rate
    u_short polyCount = 1;          // current polygon index
    int otz;                        // z-index
    struct polygon *CurrentPoly;    // points to the address of selected polygon
    // White cursor : shows which polygon is selected
    struct polygon cursorS = {
        cursorS.poly_f4,
        {255, 255, 255},        // color
@ -184,11 +116,9 @@ int main(void)
            {-1,  1, 1},
            { 1,  1, 1}
        },
-        IDMATRIX              // Matrix
+        {0}              // Matrix
    };
    //Red
    struct polygon polyS = {
    polyS.poly_f4,
    {255, 0, 0},                      // color
@ -203,15 +133,12 @@ int main(void)
        {0, 0, 0},
        {0, 0, 0}
    },
-    IDMATRIX,                       // Matrix
+    {0},                       // Matrix
    0,0,                              // depth, flag
    8,                                // rotSpeed
    1                                 // z-index
    };
    //Yellow
    struct polygon poly1S = {
    poly1S.poly_f4,
    {255, 187, 0},                    // color
@ -226,15 +153,12 @@ int main(void)
        {0, 0, 0},
        {0, 0, 0}
    },
-    IDMATRIX,                       // Matrix
+    {0},                       // Matrix
    0,0,                              // depth, flag
    -12,                              // rotSpeed
    2                                 // z-index
    };
    //Green
    struct polygon poly2S = {
    poly2S.poly_f4,
    {0, 255, 153},                    // color
@ -249,15 +173,12 @@ int main(void)
        {0, 0, 0},
        {0, 0, 0}
    },
-    IDMATRIX,                       // Matrix
+    {0},                       // Matrix
    0,0,                              // depth, flag
    -6,                               // rotSpeed
    3                                 // z-index
    };
    //Blue
    struct polygon poly3S = {
    poly3S.poly_f4,
    {112, 254, 254},                  // color
@ -272,64 +193,45 @@ int main(void)
        {0, 0, 0},
        {0, 0, 0}
    },
-    IDMATRIX,                         // Matrix
+    {0},                         // Matrix
    0,0,                              //depth, flag
    256,                              //rotSpeed
    4                                 // z-index
    };
    /////
    CurrentPoly = &polyS;
    pivotPoint(polyS.Verts, polyS.width, polyS.height, polyS.PivotV_L);
    pivotPoint(poly1S.Verts, poly1S.width, poly1S.height, poly1S.PivotV_L);
    pivotPoint(poly2S.Verts, poly2S.width, poly2S.height, poly2S.PivotV_L);
    pivotPoint(poly3S.Verts, poly3S.width, poly3S.height, poly3S.PivotV_L);
    init();
    while (1)
    {
        ClearOTagR(ot[db], OTLEN);
        cursorS.poly_f4 = (POLY_F4 *)nextpri;
        RotMatrix(&cursorS.RotV_L , &cursorS.Matrix);
        TransMatrix(&cursorS.Matrix, &CurrentPoly->TransV_L);
        SetRotMatrix(&cursorS.Matrix);
        SetTransMatrix(&cursorS.Matrix);
        setPolyF4(cursorS.poly_f4);
        setRGB0(cursorS.poly_f4,cursorS.color.r,cursorS.color.g,cursorS.color.b);
        //~ setXY4(cursorS, MovVector.vx-1, MovVector.vy-1 ,MovVector.vx + 1, MovVector.vy -1,MovVector.vx-1, MovVector.vy+1,MovVector.vx+1, MovVector.vy+1);
        RotTransPers4(
                    &cursorS.Verts[0],      &cursorS.Verts[1],      &cursorS.Verts[2],      &cursorS.Verts[3],
                    (long*)&cursorS.poly_f4->x0, (long*)&cursorS.poly_f4->x1, (long*)&cursorS.poly_f4->x2, (long*)&cursorS.poly_f4->x3,
                    &cursorS.depth,
                    &cursorS.flag
                    );
        addPrim(ot[db], cursorS.poly_f4);
        nextpri += sizeof(POLY_F4);
        ///// Red
        polyS.poly_f4 = (POLY_F4 *)nextpri;
        polyS.RotV_L.vz += polyS.rotSpeed;
        RotMatrix(&polyS.RotV_L, &polyS.Matrix);
        TransMatrix(&polyS.Matrix, &polyS.TransV_L);
        ScaleMatrix(&polyS.Matrix, &polyS.ScaleV_L);
        SetRotMatrix(&polyS.Matrix);
        SetTransMatrix(&polyS.Matrix);
        setPolyF4(polyS.poly_f4);
        setRGB0(polyS.poly_f4, polyS.color.r,polyS.color.g,polyS.color.b);        
        RotTransPers4(
@ -338,25 +240,16 @@ int main(void)
                    &polyS.depth,
                    &polyS.flag
                    );
        addPrim(ot[db]+polyS.otz, polyS.poly_f4);
        nextpri += sizeof(POLY_F4);
        ///// Yellow
        poly1S.poly_f4 = (POLY_F4 *)nextpri;
        poly1S.RotV_L.vz += poly1S.rotSpeed;
        RotMatrix(&poly1S.RotV_L, &poly1S.Matrix);
        TransMatrix(&poly1S.Matrix, &poly1S.TransV_L);
        ScaleMatrix(&poly1S.Matrix, &poly1S.ScaleV_L);
        SetRotMatrix(&poly1S.Matrix);
        SetTransMatrix(&poly1S.Matrix);
        setPolyF4(poly1S.poly_f4);
        setRGB0(poly1S.poly_f4, poly1S.color.r,poly1S.color.g,poly1S.color.b);        
        RotTransPers4(
@ -365,26 +258,16 @@ int main(void)
                    &poly1S.depth,
                    &poly1S.flag
                    );
        addPrim(ot[db]+poly1S.otz, poly1S.poly_f4);
        nextpri += sizeof(POLY_F4);
        ///// Green
        poly2S.poly_f4 = (POLY_F4 *)nextpri;
        poly2S.RotV_L.vz += poly2S.rotSpeed;
        RotMatrix(&poly2S.RotV_L, &poly2S.Matrix);
        TransMatrix(&poly2S.Matrix, &poly2S.TransV_L);
        ScaleMatrix(&poly2S.Matrix, &poly2S.ScaleV_L);
        SetRotMatrix(&poly2S.Matrix);
        SetTransMatrix(&poly2S.Matrix);
        setPolyF4(poly2S.poly_f4);
        setRGB0(poly2S.poly_f4, poly2S.color.r,poly2S.color.g,poly2S.color.b);        
        RotTransPers4(
@ -393,24 +276,16 @@ int main(void)
                    &poly2S.depth,
                    &poly2S.flag
                    );
        addPrim(ot[db]+poly2S.otz, poly2S.poly_f4);
        nextpri += sizeof(POLY_F4);
        ///// Blue
        poly3S.poly_f4 = (POLY_F4 *)nextpri;
        poly3S.RotV_L.vz += poly3S.rotSpeed;
        RotMatrix(&poly3S.RotV_L, &poly3S.Matrix);
        TransMatrix(&poly3S.Matrix, &poly3S.TransV_L);
        ScaleMatrix(&poly3S.Matrix, &poly3S.ScaleV_L);
        SetRotMatrix(&poly3S.Matrix);
        SetTransMatrix(&poly3S.Matrix);
        setPolyF4(poly3S.poly_f4);
        setRGB0(poly3S.poly_f4, poly3S.color.r,poly3S.color.g,poly3S.color.b);        
        RotTransPers4(
@ -419,19 +294,11 @@ int main(void)
                    &poly3S.depth,
                    &poly3S.flag
                    );
        addPrim(ot[db]+poly3S.otz, poly3S.poly_f4);
        nextpri += sizeof(POLY_F4);
        // Pad stuff
        int pad = PadRead(0); // init pad
        // Right D-pad
        if(pad & PADRup){
            if (CurrentPoly->PivotV_L.vy >= 0){
                CurrentPoly->PivotV_L.vy -= 1;
@ -441,7 +308,6 @@ int main(void)
                CurrentPoly->PivotV_L.vy = CurrentPoly->PivotV_L.vy;
            }
        };
        if(pad & PADRdown){
            if (CurrentPoly->PivotV_L.vy <= CurrentPoly->height ){
                CurrentPoly->PivotV_L.vy += 1;
@ -451,7 +317,6 @@ int main(void)
                CurrentPoly->PivotV_L.vy = CurrentPoly->PivotV_L.vy;
            }
        };
        if(pad & PADRleft){
            if (CurrentPoly->PivotV_L.vx >= 0){
                CurrentPoly->PivotV_L.vx -= 1;
@ -461,7 +326,6 @@ int main(void)
                CurrentPoly->PivotV_L.vx = CurrentPoly->PivotV_L.vx;
            }
        };
        if(pad & PADRright){
            if (CurrentPoly->PivotV_L.vx <= CurrentPoly->width ){
                CurrentPoly->PivotV_L.vx += 1;
@ -471,13 +335,9 @@ int main(void)
                CurrentPoly->PivotV_L.vx = CurrentPoly->PivotV_L.vx;
            }
        };
        // R1, R2, L2, L2
        if(pad & PADR1){
            if(BtnTimer == 0){
                if (polyCount < 4){ 
                    CurrentPoly -= 1;
                    BtnTimer = 10;
@ -489,9 +349,7 @@ int main(void)
                    }
            }
        }
         if(pad & PADR2){
            if(BtnTimer == 0){
                if(CurrentPoly->otz < 5 ){ 
                    CurrentPoly->otz += 1;
@ -502,9 +360,7 @@ int main(void)
                    }
            } 
        }
         if(pad & PADL1){
            if(BtnTimer == 0){
                if (CurrentPoly->rotSpeed <= 320){
                CurrentPoly->rotSpeed += 8;
@ -512,9 +368,7 @@ int main(void)
                BtnTimer = 10;
            } 
        }
        if(pad & PADL2){
            if(BtnTimer == 0){
                if (CurrentPoly->rotSpeed >= -320){
                CurrentPoly->rotSpeed -= 8;
@ -522,84 +376,50 @@ int main(void)
                BtnTimer = 10;
            } 
        }
        // Left D-Pad
        if(pad & PADLup){
            if(BtnTimer == 0){
                CurrentPoly->TransV_L.vy -= 1;
                //~ BtnTimer = 2;
            } 
        }
        if(pad & PADLdown){
            if(BtnTimer == 0){
                CurrentPoly->TransV_L.vy += 1;
                //~ BtnTimer = 2;
            } 
        }
        if(pad & PADLleft){
            if(BtnTimer == 0){
                CurrentPoly->TransV_L.vx -= 1;
                //~ BtnTimer = 2;
            } 
        }
        if(pad & PADLright){
            if(BtnTimer == 0){
                CurrentPoly->TransV_L.vx += 1;
                //~ BtnTimer = 2;
            } 
        }
        if(pad & PADstart){
            if(BtnTimer == 0){
                CurrentPoly->ScaleV_L.vx += 100;
                CurrentPoly->ScaleV_L.vy += 100;
                //~ CurrentPoly->TransV_L.vz += 1;
            } 
        }
        if(pad & PADselect){
            if(BtnTimer == 0){
               CurrentPoly->ScaleV_L.vx -= 100;
               CurrentPoly->ScaleV_L.vy -= 100;
               //~ CurrentPoly->TransV_L.vz -= 1;
            } 
        }
        // Btn_timer decrement
        if(BtnTimer > 0){
            BtnTimer -= 1;
            }
        // Debug stuff
        // Display Rotation matrix
        //~ FntPrint("Rotmatrix:\n%d %d %d\n%d %d %d\n%d %d %d \n",
                //~ Poly1Matrix.m[0][0], Poly1Matrix.m[0][1], Poly1Matrix.m[0][2],
                //~ Poly1Matrix.m[1][0], Poly1Matrix.m[1][1], Poly1Matrix.m[1][2],
                //~ Poly1Matrix.m[2][0], Poly1Matrix.m[2][1], Poly1Matrix.m[2][2]);
        // Display Mem adress and values of verticess
        //~ FntPrint("cur:%x\n  0:%x\n  1:%x\n  2:%x\n  3:%x\n", CurrentPoly, &polyS, &poly1S, &poly2S, &poly3S);
        //~ FntPrint("timer:%d polyCount:%d speed:%d", BtnTimer, polyCount, CurrentPoly->rotSpeed );
        //~ FntPrint("&poly->x0 Addr:%x Value:%d \n&poly->y0 Addr:%x Value:%d \n&poly->x1 Addr:%x Value:%d",
                //~ (long)&poly->x0, poly->x0,
                //~ (long)&poly->y0, poly->y0,
                //~ (long)&poly->x1, poly->x1);
        //~ FntPrint("otz : %d\n" , CurrentPoly->rotSpeed);
        // On-screen instructions 
        FntPrint("\
 D-Pad:move polygon.\n\
 [],X,O,\/\\ : Move pivot point.\n\
@ -608,9 +428,7 @@ R1 : select polygon\n\
 R2 : change z-index\n\
 Start,Select : Scale polygon +/-\
 ");
        FntFlush(-1);
        display();
        }
    return 0;
--- a/hello_poly_gt/hello_poly_gt.c
+++ b/hello_poly_gt/hello_poly_gt.c
@ -4,95 +4,52 @@
 // 
 // From ../psyq/addons/graphics/MESH/RMESH/TUTO0.C :
 // Schnappy 2021
 #include <sys/types.h>
 #include <stdio.h>
 #include <libgte.h>
 #include <libetc.h>
 #include <libgpu.h>
 #define VMODE 0                 // Video Mode : 0 : NTSC, 1: PAL
 #define SCREENXRES 320          // Screen width
 #define SCREENYRES 240          // Screen height
 #define CENTERX SCREENXRES/2    // Center of screen on x 
 #define CENTERY SCREENYRES/2    // Center of screen on y
 #define MARGINX 32               // margins for text display
 #define MARGINY 32
 #define FONTSIZE 8 * 5             // Text Field Height
 #define OTLEN 8                    // Ordering Table Length 
 DISPENV disp[2];                   // Double buffered DISPENV and DRAWENV
 DRAWENV draw[2];
 u_long ot[2][OTLEN];               // double ordering table of length 8 * 32 = 256 bits / 32 bytes
 char primbuff[2][32768];     // double primitive buffer of length 32768 * 8 =  262.144 bits / 32,768 Kbytes
 char *nextpri = primbuff[0];       // pointer to the next primitive in primbuff. Initially, points to the first bit of primbuff[0]
 short db = 0;                      // index of which buffer is used, values 0, 1
 // 16bpp TIM
 extern unsigned long _binary____TIM_bousai_tim_start[];
 extern unsigned long _binary____TIM_bousai_tim_end[];
 extern unsigned long _binary____TIM_bousai_tim_length;
 TIM_IMAGE bousai;
 MATRIX identity(int num)           // generate num x num matrix 
 {
   int row, col;
   MATRIX matrix;
   for (row = 0; row < num; row++)
   {
      for (col = 0; col < num; col++)
      {
         if (row == col)
            matrix.m[row][col] = 4096;
         else
            matrix.m[row][col] = 0;
      }
   }
   return matrix;
 }
 void LoadTexture(u_long * tim, TIM_IMAGE * tparam){     // This part is from Lameguy64's tutorial series : lameguy64.net/svn/pstutorials/chapter1/3-textures.html login/pw: annoyingmous
        OpenTIM(tim);                                   // Open the tim binary data, feed it the address of the data in memory
        ReadTIM(tparam);                                // This read the header of the TIM data and sets the corresponding members of the TIM_IMAGE structure
        LoadImage(tparam->prect, tparam->paddr);        // Transfer the data from memory to VRAM at position prect.x, prect.y
        DrawSync(0);                                    // Wait for the drawing to end
        if (tparam->mode & 0x8){ // check 4th bit       // If 4th bit == 1, TIM has a CLUT
            LoadImage(tparam->crect, tparam->caddr);    // Load it to VRAM at position crect.x, crect.y
            DrawSync(0);                                // Wait for drawing to end
    }
 }
 void init(void)
 {
    ResetGraph(0);
    // Initialize and setup the GTE
    InitGeom();
    SetGeomOffset(CENTERX,CENTERY);
    SetGeomScreen(CENTERX);
    SetDefDispEnv(&disp[0], 0, 0, SCREENXRES, SCREENYRES);
    SetDefDispEnv(&disp[1], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[1], 0, 0, SCREENXRES, SCREENYRES);
    if (VMODE)
    {
        SetVideoMode(MODE_PAL);
@ -102,102 +59,68 @@ void init(void)
    SetDispMask(1);                 // Display on screen    
    setRGB0(&draw[0], 128, 128, 128);
    setRGB0(&draw[1], 128, 128, 128);
    draw[0].isbg = 1;
    draw[1].isbg = 1;
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    FntLoad(960, 0);
    FntOpen(MARGINX, SCREENYRES - MARGINY - FONTSIZE, SCREENXRES - MARGINX * 2, FONTSIZE, 0, 280 );
 }
 void display(void)
 {
    DrawSync(0);
    VSync(0);
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    DrawOTag(&ot[db][OTLEN - 1]);
    db = !db;
    nextpri = primbuff[db];
 }
 int main(void)
 {
    int i;
    MATRIX IDMATRIX = identity(3);                  // Generate 3x3 identity matrix
    POLY_GT4 *poly = {0};                           // pointer to a POLY_G4 
    SVECTOR RotVector = {0, 0, 0};                  // Initialize rotation vector {x, y, z}
    VECTOR  MovVector = {0, 0, 120, 0};                   // Initialize translation vector {x, y, z}
    SVECTOR VertPos[4] = {                          // Set initial vertices position relative to 0,0 - see here : https://psx.arthus.net/docs/poly_f4.jpg
            {-32, -32, 0 },                         // Vert 1 
            {-32,  32, 0 },                         // Vert 2
            { 32, -32, 0 },                         // Vert 3
            { 32,  32, 0 }                          // Vert 4
        };                                          
-    MATRIX PolyMatrix = IDMATRIX;                   
+    MATRIX PolyMatrix = {0};                   
    DR_TPAGE * bousai_tpage;
    long polydepth;
    long polyflag;
    init();
    LoadTexture(_binary____TIM_bousai_tim_start, &bousai);
    while (1)
    {
        ClearOTagR(ot[db], OTLEN);
        poly = (POLY_GT4 *)nextpri;                    // Set poly to point to  the address of the next primitiv in the buffer
        // Set transform matrices for this polygon
        RotMatrix(&RotVector, &PolyMatrix);           // Apply rotation matrix
        TransMatrix(&PolyMatrix, &MovVector);         // Apply translation matrix   
        SetRotMatrix(&PolyMatrix);                    // Set default rotation matrix
        SetTransMatrix(&PolyMatrix);                  // Set default transformation matrix
        setPolyGT4(poly);                                      // Initialize poly as a POLY_F4 
        poly->tpage = getTPage(bousai.mode&0x3, 0, bousai.prect->x, bousai.prect->y);
        setRGB0(poly, 128, 128, 128);                       // Set vertice 1 color
        setRGB1(poly, 255, 0, 0);                           // Set vertice 2 color
        setRGB2(poly, 0, 255, 0);                           // Set vertice 3 color
        setRGB3(poly, 0, 0, 255);                           // Set vertice 4 color
        RotTransPers4(
                    &VertPos[0],      &VertPos[1],      &VertPos[2],      &VertPos[3],
                    (long*)&poly->x0, (long*)&poly->x1, (long*)&poly->x2, (long*)&poly->x3,
                    &polydepth,
                    &polyflag
                    );                                // Perform coordinate and perspective transformation for 4 vertices
        setUV4(poly, 0, 0, 0, 144, 144, 0, 144, 144);  // Set UV coordinates in order Top Left, Bottom Left, Top Right, Bottom Right 
        RotVector.vx += 8;                              // Apply rotation on Z-axis. On PSX, the Z-axis is pointing away from the screen. 
        addPrim(ot[db], poly);                         // add poly to the Ordering table
        nextpri += sizeof(POLY_GT4);                    // increment nextpri address with size of a POLY_F4 struct 
        FntPrint("Hello textured shaded !");                   
        FntFlush(-1);
        display();
        }
    return 0;
--- a/hello_poly_gt_tw/hello_poly_gt_tw.c
+++ b/hello_poly_gt_tw/hello_poly_gt_tw.c
@ -4,95 +4,52 @@
 // 
 // From ../psyq/addons/graphics/MESH/RMESH/TUTO0.C :
 // Schnappy 2021
 #include <sys/types.h>
 #include <stdio.h>
 #include <libgte.h>
 #include <libetc.h>
 #include <libgpu.h>
 #define VMODE 0                 // Video Mode : 0 : NTSC, 1: PAL
 #define SCREENXRES 320          // Screen width
 #define SCREENYRES 240          // Screen height
 #define CENTERX SCREENXRES/2    // Center of screen on x 
 #define CENTERY SCREENYRES/2    // Center of screen on y
 #define MARGINX 32               // margins for text display
 #define MARGINY 32
 #define FONTSIZE 8 * 5             // Text Field Height
 #define OTLEN 8                    // Ordering Table Length 
 DISPENV disp[2];                   // Double buffered DISPENV and DRAWENV
 DRAWENV draw[2];
 u_long ot[2][OTLEN];               // double ordering table of length 8 * 32 = 256 bits / 32 bytes
 char primbuff[2][32768];     // double primitive buffer of length 32768 * 8 =  262.144 bits / 32,768 Kbytes
 char *nextpri = primbuff[0];       // pointer to the next primitive in primbuff. Initially, points to the first bit of primbuff[0]
 short db = 0;                      // index of which buffer is used, values 0, 1
 // 16bpp TIM
 extern unsigned long _binary____TIM_bousai_tim_start[];
 extern unsigned long _binary____TIM_bousai_tim_end[];
 extern unsigned long _binary____TIM_bousai_tim_length;
 TIM_IMAGE bousai;
 MATRIX identity(int num)           // generate num x num matrix 
 {
   int row, col;
   MATRIX matrix;
   for (row = 0; row < num; row++)
   {
      for (col = 0; col < num; col++)
      {
         if (row == col)
            matrix.m[row][col] = 4096;
         else
            matrix.m[row][col] = 0;
      }
   }
   return matrix;
 }
 void LoadTexture(u_long * tim, TIM_IMAGE * tparam){     // This part is from Lameguy64's tutorial series : lameguy64.net/svn/pstutorials/chapter1/3-textures.html login/pw: annoyingmous
        OpenTIM(tim);                                   // Open the tim binary data, feed it the address of the data in memory
        ReadTIM(tparam);                                // This read the header of the TIM data and sets the corresponding members of the TIM_IMAGE structure
        LoadImage(tparam->prect, tparam->paddr);        // Transfer the data from memory to VRAM at position prect.x, prect.y
        DrawSync(0);                                    // Wait for the drawing to end
        if (tparam->mode & 0x8){ // check 4th bit       // If 4th bit == 1, TIM has a CLUT
            LoadImage(tparam->crect, tparam->caddr);    // Load it to VRAM at position crect.x, crect.y
            DrawSync(0);                                // Wait for drawing to end
    }
 }
 void init(void)
 {
    ResetGraph(0);
    // Initialize and setup the GTE
    InitGeom();
    SetGeomOffset(CENTERX,CENTERY);
    SetGeomScreen(CENTERX);
    SetDefDispEnv(&disp[0], 0, 0, SCREENXRES, SCREENYRES);
    SetDefDispEnv(&disp[1], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[1], 0, 0, SCREENXRES, SCREENYRES);
    if (VMODE)
    {
        SetVideoMode(MODE_PAL);
@ -100,124 +57,79 @@ void init(void)
        disp[1].screen.y += 8;
    }
    SetDispMask(1);                 // Display on screen    
    setRGB0(&draw[0], 128, 128, 128);
    setRGB0(&draw[1], 128, 128, 128);
    draw[0].isbg = 1;
    draw[1].isbg = 1;
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    FntLoad(960, 0);
    FntOpen(MARGINX, SCREENYRES - MARGINY - FONTSIZE, SCREENXRES - MARGINX * 2, FONTSIZE, 0, 280 );
 }
 void display(void)
 {
    DrawSync(0);
    VSync(0);
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    DrawOTag(&ot[db][OTLEN - 1]);
    db = !db;
    nextpri = primbuff[db];
 }
 int main(void)
 {
    int i;
    MATRIX IDMATRIX = identity(3);                  // Generate 3x3 identity matrix
    POLY_GT4 *poly = {0};                           // pointer to a POLY_G4 
    SVECTOR RotVector = {0, 0, 0};                  // Initialize rotation vector {x, y, z}
    VECTOR  MovVector = {0, 0, 120, 0};                   // Initialize translation vector {x, y, z}
    SVECTOR VertPos[4] = {                          // Set initial vertices position relative to 0,0 - see here : https://psx.arthus.net/docs/poly_f4.jpg
            {-32, -32, 0 },                         // Vert 1 
            {-32,  32, 0 },                         // Vert 2
            { 32, -32, 0 },                         // Vert 3
            { 32,  32, 0 }                          // Vert 4
        };                                          
-    MATRIX PolyMatrix = IDMATRIX;                   
+    MATRIX PolyMatrix = {0};                   
    DR_TPAGE * bousai_tpage;
    long polydepth;
    long polyflag;
    // Texture window
    DR_MODE * dr_mode;                              // Pointer to dr_mode prim
    RECT tws = {64, 32, 32, 32};                    // Texture window coordinates : x, y, w, h
                                                    // See libref47.pdf, p.242, 7-6, table 7-2 for possible values
    init();
    LoadTexture(_binary____TIM_bousai_tim_start, &bousai);
    while (1)
    {
        ClearOTagR(ot[db], OTLEN);
        poly = (POLY_GT4 *)nextpri;                    // Set poly to point to  the address of the next primitiv in the buffer
        // Set transform matrices for this polygon
        RotMatrix(&RotVector, &PolyMatrix);           // Apply rotation matrix
        TransMatrix(&PolyMatrix, &MovVector);         // Apply translation matrix   
        SetRotMatrix(&PolyMatrix);                    // Set default rotation matrix
        SetTransMatrix(&PolyMatrix);                  // Set default transformation matrix
        setPolyGT4(poly);                                      // Initialize poly as a POLY_F4 
        poly->tpage = getTPage(bousai.mode&0x3, 0, bousai.prect->x, bousai.prect->y);
        setRGB0(poly, 128, 128, 128);                       // Set vertice 1 color
        setRGB1(poly, 255, 0, 0);                           // Set vertice 2 color
        setRGB2(poly, 0, 255, 0);                           // Set vertice 3 color
        setRGB3(poly, 0, 0, 255);                           // Set vertice 4 color
        RotTransPers4(
                    &VertPos[0],      &VertPos[1],      &VertPos[2],      &VertPos[3],
                    (long*)&poly->x0, (long*)&poly->x1, (long*)&poly->x2, (long*)&poly->x3,
                    &polydepth,
                    &polyflag
                    );                                // Perform coordinate and perspective transformation for 4 vertices
        setUV4(poly, 0, 0, 0, 144, 144, 0, 144, 144);  // Set UV coordinates in order Top Left, Bottom Left, Top Right, Bottom Right 
        RotVector.vy += 14;                              // Apply rotation on Z-axis. On PSX, the Z-axis is pointing away from the screen. 
        addPrim(ot[db], poly);                         // add poly to the Ordering table
        nextpri += sizeof(POLY_GT4);                    // increment nextpri address with size of a POLY_GT4 struct 
        // drawing mode primitive
        dr_mode = (DR_MODE *)nextpri;                   // initialize drawing mode primitive
        setDrawMode(dr_mode, 1, 0, getTPage(bousai.mode&0x3, 0, bousai.prect->x, bousai.prect->y), &tws);  //set texture window
        addPrim(ot[db], dr_mode);                      
        nextpri += sizeof(DR_MODE);                    // increment nextpri address with size of a  DR_MODE struct 
        FntPrint("Hello textured shaded !");                   
        FntFlush(-1);
        display();
        }
    return 0;
--- a/hello_poly_inline/hello_poly_inline.c
+++ b/hello_poly_inline/hello_poly_inline.c
@ -34,7 +34,7 @@
 DISPENV disp[2];                        // Double buffered DISPENV and DRAWENV
 DRAWENV draw[2];
 u_long ot[2][OTLEN];               // double ordering table of length 8 * 32 = 256 bits / 32 bytes
-char primbuff[2][32768] = {0};     // double primitive buffer of length 32768 * 8 =  262.144 bits / 32,768 Kbytes
+char primbuff[2][32768];           // double primitive buffer of length 32768 * 8 =  262.144 bits / 32,768 Kbytes
 char *nextpri = primbuff[0];       // pointer to the next primitive in primbuff. Initially, points to the first bit of primbuff[0]
 short db = 0;                      // index of which buffer is used, values 0, 1
@ -53,12 +53,7 @@ void init(void)
    SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[1], 0, 0, SCREENXRES, SCREENYRES);
    // If PAL, use 320x256, hence 256 - 240 = 16 / 2 = 8 px vertical offset
-    if (VMODE)
+    if (VMODE) SetVideoMode(MODE_PAL);
    {
        SetVideoMode(MODE_PAL);
        disp[0].screen.y += 8;
        disp[1].screen.y += 8;
    }
    SetDispMask(1);
    // Set background color
    setRGB0(&draw[0], 50, 50, 50);
--- a/hello_poly_subdiv/hello_poly_subdiv.c
+++ b/hello_poly_subdiv/hello_poly_subdiv.c
@ -34,7 +34,7 @@
 DISPENV disp[2];                        // Double buffered DISPENV and DRAWENV
 DRAWENV draw[2];
 u_long ot[2][OTLEN];               // double ordering table of length 8 * 32 = 256 bits / 32 bytes
-char primbuff[2][32768] = {1};     // double primitive buffer of length 32768 * 8 =  262.144 bits / 32,768 Kbytes
+char primbuff[2][32768];     // double primitive buffer of length 32768 * 8 =  262.144 bits / 32,768 Kbytes
 char *nextpri = primbuff[0];       // pointer to the next primitive in primbuff. Initially, points to the first bit of primbuff[0]
 short db = 0;                      // index of which buffer is used, values 0, 1
@ -55,12 +55,7 @@ void init(void)
    SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[1], 0, 0, SCREENXRES, SCREENYRES);
    // If PAL, use 320x256, hence 256 - 240 = 16 / 2 = 8 px vertical offset
-    if (VMODE)
+    if (VMODE) SetVideoMode(MODE_PAL);
    {
        SetVideoMode(MODE_PAL);
        disp[0].screen.y += 8;
        disp[1].screen.y += 8;
    }
    SetDispMask(1);
    // Set background color
    setRGB0(&draw[0], 50, 50, 50);
--- a/hello_sio/hello_sio.c
+++ b/hello_sio/hello_sio.c
@ -29,7 +29,7 @@
 DISPENV disp[2];
 DRAWENV draw[2];
 u_long      ot[2][OTLEN];                   // Ordering table (contains addresses to primitives)
-char    primbuff[2][PRIMBUFFLEN] = {0};     // Primitive list // That's our prim buffer
+char    primbuff[2][PRIMBUFFLEN];     // Primitive list // That's our prim buffer
 char * nextpri = primbuff[0];               // Primitive counter
 short           db  = 0;                    // Current buffer counter
 // SIO
--- a/hello_sprt/hello_sprt.c
+++ b/hello_sprt/hello_sprt.c
@ -7,229 +7,151 @@
 #include <libgte.h>
 #include <libetc.h>
 #include <libgpu.h>
 #define VMODE 0         // Video Mode : 0 : NTSC, 1: PAL
 #define SCREENXRES 320
 #define SCREENYRES 240
 #define CENTERX SCREENXRES/2
 #define CENTERY SCREENYRES/2
 #define MARGINX 32      // margins for text display
 #define MARGINY 44
 #define FONTSIZE 8 * 3          // Text Field Height
 #define OTLEN 8              // Ordering Table Length 
 DISPENV disp[2];             // Double buffered DISPENV and DRAWENV
 DRAWENV draw[2];
 u_long ot[2][OTLEN];     // double ordering table of length 8 * 32 = 256 bits / 32 bytes
 char primbuff[2][32768];     // double primitive buffer of length 32768 * 8 =  262.144 bits / 32,768 Kbytes
 char *nextpri = primbuff[0]; // pointer to the next primitive in primbuff. Initially, points to the first bit of primbuff[0]
 short db = 0;                // index of which buffer is used, values 0, 1
 // Embed TIM files
 // See https://github.com/ABelliqueux/nolibgs_hello_worlds#embedding-binary-data-in-a-ps-exe
 // 16bpp TIM
 extern unsigned long _binary____TIM_TIM16_tim_start[];
 extern unsigned long _binary____TIM_TIM16_tim_end[];
 extern unsigned long _binary____TIM_TIM16_tim_length;
 // 8bpp TIM
 extern unsigned long _binary____TIM_TIM8_tim_start[];
 extern unsigned long _binary____TIM_TIM8_tim_end[];
 extern unsigned long _binary____TIM_TIM8_TIM_length;
 // 4bpp TIM
 extern unsigned long _binary____TIM_TIM4_tim_start[];
 extern unsigned long _binary____TIM_TIM4_tim_end[];
 extern unsigned long _binary____TIM_TIM4_tim_length;
 TIM_IMAGE TIM_16;
 TIM_IMAGE TIM_8;
 TIM_IMAGE TIM_4;
 void LoadTexture(u_long * tim, TIM_IMAGE * tparam){     // This part is from Lameguy64's tutorial series : lameguy64.net/svn/pstutorials/chapter1/3-textures.html login/pw: annoyingmous
        OpenTIM(tim);                                   // Open the tim binary data, feed it the address of the data in memory
        ReadTIM(tparam);                                // This read the header of the TIM data and sets the corresponding members of the TIM_IMAGE structure
        LoadImage(tparam->prect, tparam->paddr);        // Transfer the data from memory to VRAM at position prect.x, prect.y
        DrawSync(0);                                    // Wait for the drawing to end
        if (tparam->mode & 0x8){ // check 4th bit       // If 4th bit == 1, TIM has a CLUT
            LoadImage(tparam->crect, tparam->caddr);    // Load it to VRAM at position crect.x, crect.y
            DrawSync(0);                                // Wait for drawing to end
    }
 }
 void init(void)
 {
    ResetGraph(0);
    SetDefDispEnv(&disp[0], 0, 0, SCREENXRES, SCREENYRES);
    SetDefDispEnv(&disp[1], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[1], 0, 0, SCREENXRES, SCREENYRES);
    if (VMODE)
    {
        SetVideoMode(MODE_PAL);
        disp[0].screen.y += 8;
        disp[1].screen.y += 8;
        }
    SetDispMask(1);                 // Display on screen    
    setRGB0(&draw[0], 50, 50, 50);
    setRGB0(&draw[1], 50, 50, 50);
    draw[0].isbg = 1;
    draw[1].isbg = 1;
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    FntLoad(960, 0);
    FntOpen(MARGINX, SCREENYRES - MARGINY - FONTSIZE, SCREENXRES - MARGINX * 2, FONTSIZE, 0, 280 );
 }
 void display(void)
 {
    DrawSync(0);
    VSync(0);
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    DrawOTag(&ot[db][OTLEN - 1]);
    db = !db;
    nextpri = primbuff[db];
 }
 int main(void)
 {
    SPRT * sprt_16b;                // Define 3 pointers to SPRT struct
    SPRT * sprt_8b;
    SPRT * sprt_4b;
    DR_TPAGE * tpage_16b;           // Define 3 pointers to DR_TPAGE struct. We need three because our images are on three 
    DR_TPAGE * tpage_8b;            // different texture pages.
    DR_TPAGE * tpage_4b;
    init();
    LoadTexture(_binary____TIM_TIM16_tim_start, &TIM_16); // Load everything to vram
    LoadTexture(_binary____TIM_TIM8_tim_start, &TIM_8);
    LoadTexture(_binary____TIM_TIM4_tim_start, &TIM_4);
    while (1)
    {
        ClearOTagR(ot[db], OTLEN);
        // Loading a 16 bit TIM 
        sprt_16b = (SPRT *)nextpri;                 // Cast whats at nexpri as a SPRT named sprt_16b
        setSprt(sprt_16b);                          // Initialize the SPRT struct
        setRGB0(sprt_16b, 128, 128, 128);           // Set RGB color. 128,128,128 is neutral. You can color the image by adjusting these values
        setXY0(sprt_16b, 28, MARGINY);              // Set sprite position
        setWH(sprt_16b, 64, 128 );                  // Set sprite width and height
        addPrim(ot[db], sprt_16b);                  // add the sprite primitive to the ordering table
        nextpri += sizeof(SPRT);                    // increment nextpri so that it points just after sprt_16b in the primitive buffer
        // Set Texture page for the 16bit tim : 768, 0 - No CLUT
        // Note :  You need to use setDrawTPage each time you want to use a texture that's on a different texture page
        tpage_16b = (DR_TPAGE*)nextpri;
        setDrawTPage(tpage_16b, 0, 1,               // Set the Texture Page the texture we want resides on.
            getTPage(TIM_16.mode&0x3, 0,            // Here we are using bitmasking to deduce the picture mode : &0x3
            TIM_16.prect->x, TIM_16.prect->y));     // In binary, 3 is 11, so we only keep the first two bits
                                                    // Values can be 00 (0), 01 (1), 10(2), respectively, 4bpp, 8bpp, 15bpp, 24bpp. See Fileformat47.pdf, p.180
                                                    // Similarly, we could use bitmasking to deduce if there is a CLUT by bitmasking the 4th bit : if(TIM_IMAGE.mode & 0x8) LoadImage... :  
        addPrim(ot[db], tpage_16b);                 // add the sprite primitive to the ordering table
        nextpri += sizeof(DR_TPAGE);                // Advance next primitive address
        // Loading a 8 bit TIM
        sprt_8b = (SPRT *)nextpri;
        setSprt(sprt_8b);
        setRGB0(sprt_8b, 128, 128, 128);        
        setXY0(sprt_8b, sprt_16b->x0 + sprt_16b->w + 32, MARGINY);
        setWH(sprt_8b, 64, 128 );
        setClut(sprt_8b, TIM_8.crect->x, TIM_8.crect->y);       // Only difference here is we set the CLUT to the position of the VRAM we loaded the palette earlier (see LoadTexture())
        addPrim(ot[db], sprt_8b);
        nextpri += sizeof(SPRT);
        // Set Texture page for the 8bit tim : 512, 256 - CLUT is at 0, 480
        tpage_8b = (DR_TPAGE*)nextpri;
        setDrawTPage(tpage_8b, 0, 1,               
            getTPage(TIM_8.mode&0x3, 0,            
            TIM_8.prect->x, TIM_8.prect->y));
        addPrim(ot[db], tpage_8b);                 
        nextpri += sizeof(DR_TPAGE);               
        // Loading a 4 bit TIM
        sprt_4b = (SPRT *)nextpri;
        setSprt(sprt_4b);
        setRGB0(sprt_4b, 128, 128, 128);        
        setXY0(sprt_4b, sprt_8b->x0 + sprt_8b->w + 32, MARGINY);
        setWH(sprt_4b, 64, 128 );
        setClut(sprt_4b, TIM_4.crect->x, TIM_4.crect->y);
        addPrim(ot[db], sprt_4b);
        nextpri += sizeof(SPRT);
        // Set Texture page for the 4bit tim : 512, 256 - CLUT is at 0, 480
        tpage_4b = (DR_TPAGE*)nextpri;
        setDrawTPage(tpage_4b, 0, 1,                
            getTPage(TIM_4.mode&0x3, 0,             
            TIM_4.prect->x, TIM_4.prect->y));
        addPrim(ot[db], tpage_4b);                  
        nextpri += sizeof(DR_TPAGE);                
        FntPrint("16 Bit!     ");
        FntPrint("8 Bit!      ");
        FntPrint("4 Bit!\n\n");
        FntPrint("Check VRAM in emu to see the dif");
        FntFlush(-1);
        display();
        }
    return 0;
--- a/hello_tile/hello_tile.c
+++ b/hello_tile/hello_tile.c
@ -6,84 +6,57 @@
 #include <libgte.h>
 #include <libetc.h>
 #include <libgpu.h>
 #define VMODE 0         // Video Mode : 0 : NTSC, 1: PAL
 #define SCREENXRES 320
 #define SCREENYRES 240
 #define CENTERX SCREENXRES/2
 #define CENTERY SCREENYRES/2
 #define MARGINX 0            // margins for text display
 #define MARGINY 32
 #define FONTSIZE 8 * 7       // Text Field Height
 #define OTLEN 8              // Ordering Table Length 
 DISPENV disp[2];             // Double buffered DISPENV and DRAWENV
 DRAWENV draw[2];
 u_long ot[2][OTLEN];          // double ordering table of length 8 * 32 = 256 bits / 32 bytes
-
+char primbuff[2][32768];// double primitive buffer of length 32768 * 8 =  262.144 bits / 32,768 Kbytes
 char primbuff[2][32768] = {0};// double primitive buffer of length 32768 * 8 =  262.144 bits / 32,768 Kbytes
 char *nextpri = primbuff[0];  // pointer to the next primitive in primbuff. Initially, points to the first bit of primbuff[0]
 short db = 0;                 // index of which buffer is used, values 0, 1
 void init(void)
 {
    ResetGraph(0);
    SetDefDispEnv(&disp[0], 0, 0, SCREENXRES, SCREENYRES);
    SetDefDispEnv(&disp[1], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[1], 0, 0, SCREENXRES, SCREENYRES);
    if (VMODE)
    {
        SetVideoMode(MODE_PAL);
        disp[0].screen.y += 8;
        disp[1].screen.y += 8;
        }
    SetDispMask(1);                 // Display on screen    
    setRGB0(&draw[0], 50, 50, 50);
    setRGB0(&draw[1], 50, 50, 50);
    draw[0].isbg = 1;
    draw[1].isbg = 1;
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    FntLoad(960, 0);
    FntOpen(MARGINX, SCREENYRES - MARGINY - FONTSIZE, SCREENXRES - MARGINX * 2, FONTSIZE, 0, 280 );
 }
 void display(void)
 {
    DrawSync(0);
    VSync(0);
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    // We're using a reverse OT, so we want to display the last item first. See PsyQ's LibRef47.pdf, p.277
    DrawOTag(&ot[db][OTLEN - 1]);
    // Uncomment the following line to use a regular oredered OT. Uncomment l.100 accordingly
    //~ DrawOTag(ot[db]);
    db = !db;
    nextpri = primbuff[db];
 }
 int main(void)
 {
    // These two tiles are added at the same OT index
@ -91,61 +64,44 @@ int main(void)
    TILE * pink_tile;
    // This one is added at a different OT index
    TILE * yellow_tile;
    init();
    while (1)
    {
        // Initialize the reversed ordering table. This means the elements at index OTLEN - 1 is drawn first.
        ClearOTagR(ot[db], OTLEN);
        // Use regular order OT, uncomment l.77 accordingly
        //~ ClearOTag(ot[db], OTLEN); 
        // yellow_tile is before pink and blue tile in the code, 
        // and it displays behind because it is added to a different ot index (od[db] + OTLEN - 1)
        // Using a Regular or Reverse OT will have an effect on drawing order. (See lines 77 and 100)
        yellow_tile = (TILE * ) nextpri;                   // yellow_tile is a pointer to primbuf content at adress nextpri, that's cast (type converted) to a TILE struc.   
        setTile(yellow_tile);                              // initialize the TILE structure ( fill the length and tag(?) value )
        setXY0(yellow_tile, CENTERX - 32 , CENTERY - 48);  // Set X,Y
        setWH(yellow_tile, 128, 40);                       // Set Width, Height
        setRGB0(yellow_tile, 255, 255, 0);                 // Set color
        addPrim(ot[db] + OTLEN - 1, yellow_tile);                    // Add primitive to ordering table
        nextpri += sizeof(TILE);     
        // blue_tile added at od[db] + OTLEN - 2
        blue_tile = (TILE * ) nextpri;                  // blue_tile is a pointer to primbuf content at adress nextpri, that's cast (type converted) to a blue_tile struc.   
        setTile(blue_tile);                              // initialize the blue_tile structure ( fill the length and tag(?) value )
        setXY0(blue_tile, CENTERX - 16, CENTERY - 32);   // Set X,Y
        setWH(blue_tile, 32, 64);                        // Set Width, Height
        setRGB0(blue_tile, 60, 180, 255);                // Set color
        addPrim(ot[db] + OTLEN - 2, blue_tile);                      // Add primitive to ordering table
        nextpri += sizeof(TILE);                    // Increment the adress nextpri points to by the size of TILE struct
        // pink_tile is after blue_tile in the code, 
        // so it is drawn before, thus under blue_tile.
        // However, it is added at the same ot index (od[db] + OTLEN - 2)
        // so using a Regular or Reverse OT won't have an effect on drawing order.
        pink_tile = (TILE * ) nextpri;                  // pink_tile is a pointer to primbuf content at adress nextpri, that's cast (type converted) to a TILE struc.   
        setTile(pink_tile);                              // initialize the TILE structure ( fill the length and tag(?) value )
        setXY0(pink_tile, CENTERX, CENTERY - 64);   // Set X,Y
        setWH(pink_tile, 64, 64);                        // Set Width, Height
        setRGB0(pink_tile, 255, 32, 255);                // Set color
        addPrim(ot[db] + OTLEN - 2, pink_tile);                      // Add primitive to ordering table
        nextpri += sizeof(TILE);     
        FntPrint("Hello tile !");
        FntFlush(-1);
        display();
        }
    return 0;
--- a/hello_vag/hello_vag.c
+++ b/hello_vag/hello_vag.c
@ -20,44 +20,29 @@
 //            libover47.pdf,  p.271
 //            libref47.pdf,   p.980
 // URLS : http://psx.arthus.net/code/VAG/
 #include <sys/types.h>
 #include <stdio.h>
 #include <libgte.h>
 #include <libetc.h>
 #include <libgpu.h>
 // Sound system
 #include <libsnd.h>
 #include <libspu.h>
 #define VMODE 0                 // Video Mode : 0 : NTSC, 1: PAL
 #define SCREENXRES 320
 #define SCREENYRES 240
 #define CENTERX SCREENXRES/2
 #define CENTERY SCREENYRES/2
 #define MARGINX 0               // margins for text display
 #define MARGINY 32
 #define FONTSIZE 8 * 7          // Text Field Height
 DISPENV disp[2];                // Double buffered DISPENV and DRAWENV
 DRAWENV draw[2];
 short db = 0;                   // index of which buffer is used, values 0, 1
 // Sound stuff
 #define MALLOC_MAX 3            // Max number of time we can call SpuMalloc
 //~ // convert Little endian to Big endian
 #define SWAP_ENDIAN32(x) (((x)>>24) | (((x)>>8) & 0xFF00) | (((x)<<8) & 0x00FF0000) | ((x)<<24))
 typedef struct VAGheader{       // All the values in this header must be big endian
        char id[4];             // VAGp         4 bytes -> 1 char * 4
        unsigned int version;          // 4 bytes
@ -68,111 +53,74 @@ typedef struct VAGheader{       // All the values in this header must be big end
        char  name[16];         // 16 bytes -> 1 char * 16
        // Waveform data after that
 }VAGhdr;
 SpuCommonAttr commonAttributes;          // structure for changing common voice attributes
 SpuVoiceAttr  voiceAttributes ;          // structure for changing individual voice attributes
 u_long vag_spu_address;                  // address allocated in memory for first sound file
 // DEBUG : these allow printing values for debugging
 u_long spu_start_address;                
 u_long get_start_addr;
 u_long transSize;                            
 // Memory management table ; allow MALLOC_MAX calls to SpuMalloc() - ibref47.pdf p.1044
 char spu_malloc_rec[SPU_MALLOC_RECSIZ * (2 + MALLOC_MAX+1)]; 
 // VAG files
 // We're using GrumpyCoder's Nugget wrapper to compile the code with a modern GCC : https://github.com/grumpycoders/pcsx-redux/tree/main/src/mips/psyq
 // To include binary files in the exe, add your VAG files to the SRCS variable in Makefile
 // and in common.mk, add this rule to include *.vag files :
 //
 //~ %.o: %.vag
    //~ $(PREFIX)-objcopy -I binary --set-section-alignment .data=4 --rename-section .data=.rodata,alloc,load,readonly,data,contents -O elf32-tradlittlemips -B mips $< $@
 // hello_poly.vag - 44100 Khz
 extern unsigned char _binary____VAG_hello_poly_vag_start[]; // filename must begin with _binary_ followed by the full path, with . and / replaced, and then suffixed with _ and end with _start[]; or end[];
 extern unsigned char _binary____VAG_hello_poly_vag_end[];   // Going up one directory level is 4 '_' : ____ as ./ is replaced by __ 
                                                            // https://discord.com/channels/642647820683444236/663664210525290507/780866265077383189
 void initGraph(void)
 {
    ResetGraph(0);
    SetDefDispEnv(&disp[0], 0, 0, SCREENXRES, SCREENYRES);
    SetDefDispEnv(&disp[1], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES);
    SetDefDrawEnv(&draw[1], 0, 0, SCREENXRES, SCREENYRES);
    if (VMODE)
    {
        SetVideoMode(MODE_PAL);
        disp[0].screen.y += 8;
        disp[1].screen.y += 8;
        }
    SetDispMask(1);                 // Display on screen    
    setRGB0(&draw[0], 50, 50, 50);
    setRGB0(&draw[1], 50, 50, 50);
    draw[0].isbg = 1;
    draw[1].isbg = 1;
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    FntLoad(960, 0);
    FntOpen(8, 60, 304, 200, 0, 500 );
 }
 void display(void)
 {
    DrawSync(0);
    VSync(0);
    PutDispEnv(&disp[db]);
    PutDrawEnv(&draw[db]);
    db = !db;
 }
 // Audio initialisation & functions
 void initSnd(void){
    SpuInitMalloc(MALLOC_MAX, spu_malloc_rec);                      // Maximum number of blocks, mem. management table address.
    commonAttributes.mask = (SPU_COMMON_MVOLL | SPU_COMMON_MVOLR);  // Mask which attributes to set
    commonAttributes.mvol.left  = 0x3fff;                           // Master volume left
    commonAttributes.mvol.right = 0x3fff;                           // see libref47.pdf, p.1058
    SpuSetCommonAttr(&commonAttributes);                            // set attributes
    SpuSetIRQ(SPU_OFF);
 }
 u_long sendVAGtoRAM(unsigned int VAG_data_size, unsigned char *VAG_data){
    u_long size;
    SpuSetTransferMode(SpuTransByDMA);                              // DMA transfer; can do other processing during transfer
    size = SpuWrite (VAG_data + sizeof(VAGhdr), VAG_data_size);     // transfer VAG_data_size bytes from VAG_data  address to sound buffer
    SpuIsTransferCompleted (SPU_TRANSFER_WAIT);                     // Checks whether transfer is completed and waits for completion
    return size;
 }
 void setVoiceAttr(unsigned int pitch, long channel, unsigned long soundAddr ){
    voiceAttributes.mask=                                   //~ Attributes (bit string, 1 bit per attribute)
    (
      SPU_VOICE_VOLL |
@ -188,74 +136,49 @@ void setVoiceAttr(unsigned int pitch, long channel, unsigned long soundAddr ){
      SPU_VOICE_ADSR_RR |
      SPU_VOICE_ADSR_SL
    );
    voiceAttributes.voice        = channel;                 //~ Voice (low 24 bits are a bit string, 1 bit per voice )
    voiceAttributes.volume.left  = 0x1000;                  //~ Volume 
    voiceAttributes.volume.right = 0x1000;                  //~ Volume
    voiceAttributes.pitch        = pitch;                   //~ Interval (set pitch)
    voiceAttributes.addr         = soundAddr;               //~ Waveform data start address
    voiceAttributes.a_mode       = SPU_VOICE_LINEARIncN;    //~ Attack rate mode  = Linear Increase - see libref47.pdf p.1091
    voiceAttributes.s_mode       = SPU_VOICE_LINEARIncN;    //~ Sustain rate mode = Linear Increase
    voiceAttributes.r_mode       = SPU_VOICE_LINEARDecN;    //~ Release rate mode = Linear Decrease
    voiceAttributes.ar           = 0x0;                     //~ Attack rate
    voiceAttributes.dr           = 0x0;                     //~ Decay rate
    voiceAttributes.rr           = 0x0;                     //~ Release rate
    voiceAttributes.sr           = 0x0;                     //~ Sustain rate
    voiceAttributes.sl           = 0xf;                     //~ Sustain level
    SpuSetVoiceAttr(&voiceAttributes);                      // set attributes
 }
 void playSFX(void){
    SpuSetKey(SpuOn,SPU_0CH);                               // Set several channels by ORing  each channel bit ; ex : SpuSetKey(SpuOn,SPU_0CH | SPU_3CH | SPU_8CH); channels 0, 3, 8 are on.
 }
 int main(void)
 {
    short counter = 0;
    const VAGhdr * VAGfileHeader = (VAGhdr *) _binary____VAG_hello_poly_vag_start;   // get header of VAG file
    // From libover47.pdf :
    // The sampling frequency of the original audio file can be used to determine the pitch
    // at which to play the VAG. pitch = (sampling frequency << 12)/44100L 
    // Ex: 44.1kHz=0x1000 22.05kHz=0x800 etc
    unsigned int pitch =   (SWAP_ENDIAN32(VAGfileHeader->samplingFrequency) << 12) / 44100L; 
    SpuInit();                                                                            // Initialize SPU. Called only once.
    initSnd();
    //~ // First VAG
    vag_spu_address   = SpuMalloc(SWAP_ENDIAN32(VAGfileHeader->dataSize));                // Allocate an area of dataSize bytes in the sound buffer. 
    spu_start_address = SpuSetTransferStartAddr(vag_spu_address);                         // Sets a starting address in the sound buffer
    get_start_addr    = SpuGetTransferStartAddr();                                        // SpuGetTransferStartAddr() returns current sound buffer transfer start address.
    transSize         = sendVAGtoRAM(SWAP_ENDIAN32(VAGfileHeader->dataSize), _binary____VAG_hello_poly_vag_start);
    // set VAG to channel 
    setVoiceAttr(pitch, SPU_0CH, vag_spu_address);
    initGraph();
    while (1)
    {
        if(!counter){
            playSFX();
            counter = 180;
        }
        FntPrint("\nPitch             : %08x-%dKhz", pitch, (SWAP_ENDIAN32(VAGfileHeader->samplingFrequency)) );
        FntPrint("\nSet Start addr    : %08x", vag_spu_address);
        FntPrint("\nReturn start addr : %08x", spu_start_address);      
@ -263,13 +186,9 @@ int main(void)
        FntPrint("\nSend size         : %08x", SWAP_ENDIAN32(VAGfileHeader->dataSize));  
        FntPrint("\nReturn size       : %08x\n", transSize);  
        FntPrint("\nCounter       : %d\n", counter);  
        FntFlush(-1);
        counter --;
        display();
    }
    return 0;
    }
--- a/hello_world/hello_world.c
+++ b/hello_world/hello_world.c
@ -1,87 +1,60 @@
 // Demonstrate DISP/DRAW env, font setup, and display a text.
 // Schnappy 2020
 // Based on Lameguy64 tutorial : http://lameguy64.net/svn/pstutorials/chapter1/1-display.html
 #include <sys/types.h>
 #include <stdio.h>
 #include <libgte.h>
 #include <libetc.h>
 #include <libgpu.h>
 #define VMODE 0                 // Video Mode : 0 : NTSC, 1: PAL
 #define SCREENXRES 320          // Screen width
 #define SCREENYRES 240          // Screen height
 #define CENTERX SCREENXRES/2    // Center of screen on x 
 #define CENTERY SCREENYRES/2    // Center of screen on y
 #define MARGINX 0                // margins for text display
 #define MARGINY 32
 #define FONTSIZE 8 * 7           // Text Field Height
 DISPENV disp[2];                 // Double buffered DISPENV and DRAWENV
 DRAWENV draw[2];
 short db = 0;                      // index of which buffer is used, values 0, 1
 void init(void)
 {
    ResetGraph(0);                 // Initialize drawing engine with a complete reset (0)
    SetDefDispEnv(&disp[0], 0, 0         , SCREENXRES, SCREENYRES);     // Set display area for both &disp[0] and &disp[1]
    SetDefDispEnv(&disp[1], 0, SCREENYRES, SCREENXRES, SCREENYRES);     // &disp[0] is on top  of &disp[1]
    SetDefDrawEnv(&draw[0], 0, SCREENYRES, SCREENXRES, SCREENYRES);     // Set draw for both &draw[0] and &draw[1]
    SetDefDrawEnv(&draw[1], 0, 0         , SCREENXRES, SCREENYRES);     // &draw[0] is below &draw[1]
    if (VMODE)                  // PAL
    {
        SetVideoMode(MODE_PAL);
        disp[0].screen.y += 8;  // add offset : 240 + 8 + 8 = 256
        disp[1].screen.y += 8;
        }
    SetDispMask(1);                 // Display on screen    
    setRGB0(&draw[0], 50, 50, 50); // set color for first draw area
    setRGB0(&draw[1], 50, 50, 50); // set color for second draw area
    draw[0].isbg = 1;               // set mask for draw areas. 1 means repainting the area with the RGB color each frame 
    draw[1].isbg = 1;
    PutDispEnv(&disp[db]);          // set the disp and draw environnments
    PutDrawEnv(&draw[db]);
    FntLoad(960, 0);                // Load font to vram at 960,0(+128)
    FntOpen(MARGINX, SCREENYRES - MARGINY - FONTSIZE, SCREENXRES - MARGINX * 2, FONTSIZE, 0, 280 ); // FntOpen(x, y, width, height,  black_bg, max. nbr. chars
 }
 void display(void)
 {
    DrawSync(0);                    // Wait for all drawing to terminate
    VSync(0);                       // Wait for the next vertical blank
    PutDispEnv(&disp[db]);          // set alternate disp and draw environnments
    PutDrawEnv(&draw[db]);  
    db = !db;                       // flip db value (0 or 1)
 }
 int main(void)
 {
    init();                         // execute init()
    while (1)                       // infinite loop
    {   
        FntPrint("Hello world !");  // Send string to print stream
        FntFlush(-1);               // Draw printe stream
        display();                  // Execute display()
    }
    return 0;