kvisc/os/dos.k

; The OS/K Team licences this file to you under the MIT license.
; See the LICENSE file in the project root for more information.

hw = "Hello World"

;
; void main(void)
;
; Entry point
;
main:
    ; Initializes the stack
    mov rbp, 0x200000
    mov rsp, rbp

    mov ax0, hw
    call print
    stop

;
; Max amount of characters that print() will print
;
v_print_max := 0xFF

;
; void print(char *)
;
; Print a string
;
print:
    enter
    mov rcx, v_print_max

.p1:
    test b[ax0], b[ax0]
    jz .p2
    prn b[ax0]
    inc ax0
    loop .p1

.p2:
    leave
    ret

;
; void print_n(char *, int)
;
; Print exactly ax1 characters
;
print_n:
    enter
    mov rcx, ax1

.pn1:
    prn b[ax0]
    inc ax0
    loop .pn1

    leave
    ret