diff --git a/boot/loader/loader.asm b/boot/loader/loader.asm
index ed12c2b..e8fa209 100644
--- a/boot/loader/loader.asm
+++ b/boot/loader/loader.asm
@@ -52,7 +52,7 @@ BtHeader:
 
 [section .joke]
 ;; MAGNIFICENT MULTIBOOT HEADER FOR OUR OS BINARY --------------------------- ;;
-db "This program cannot be run in Win32 mode, or DOS mode, or in any operating system mode that owns your fantasy. KTHXBYE",0
+db "This program cannot be run in Win32 mode, or DOS mode, or in any operating system mode that owns your fantasy.",0
 
 [section .text]
 ;;MULTIBOOT POINT ENTRY FOR GRUB -------------------------------------------- ;;
diff --git a/kaleid/kernel/mm/palloc.c b/kaleid/kernel/mm/palloc.c
index 7994ebb..067d054 100644
--- a/kaleid/kernel/mm/palloc.c
+++ b/kaleid/kernel/mm/palloc.c
@@ -257,6 +257,8 @@ error_t MmMapPageFrame(ulong id, void *virtAddr, ulong flags)
     assert(id);
     AllocatedPage_t *busyPage = &busyPagesList;
 
+    void *virtAddrBegin = virtAddr;
+
     while(busyPage->next) {
         busyPage = busyPage->next;
 
@@ -272,6 +274,9 @@ error_t MmMapPageFrame(ulong id, void *virtAddr, ulong flags)
         }
     }
 
+    DebugLog("Page frame id %d mapped from %p to %p\n",
+             id, virtAddrBegin, virtAddr);
+
     return EOK;
 }
 
@@ -295,5 +300,7 @@ error_t MmUnmapPageFrame(ulong id)
         }
     }
 
+    DebugLog("Page frame id %d unmapped\n", id);
+
     return EOK;
 }
diff --git a/kaleid/kernel/sh/shcmds.c b/kaleid/kernel/sh/shcmds.c
index af245e2..a8a5e72 100644
--- a/kaleid/kernel/sh/shcmds.c
+++ b/kaleid/kernel/sh/shcmds.c
@@ -130,6 +130,62 @@ error_t CmdDmesg(int argc, char **argv, char *cmdline)
     return EOK;
 }
 
+error_t CmdDumpMem(int argc, char **argv, char *cmdline)
+{
+    if (argc < 2 || argc > 3) {
+        KernLog("Invalid argument : argc = %d\n", argc);
+        return EINVAL;
+    }
+
+    char sector[8192] = {0};
+    int maximum = 0;
+    int x = 0;
+    int step = 8;
+    char *address = (char*)strtoul(argv[1], NULL, 16);
+    char *end = (char*)(strtoul(argv[1], NULL, 16) + step);
+
+    if (argc >= 3) {
+        end = (char*)(strtoul(argv[2], NULL, 16) + step);
+    }
+
+    maximum = (int)(end - address);
+
+    if (address > end) {
+        KernLog("Invalid argument\n");
+        return EINVAL;
+    }
+
+    //KernLog("Address begin: %p\tAddress end: %p\n", address, end);
+
+    for (int i = 0; i < 8192 && i < maximum; i++) {
+        sector[i] = *(address+i);
+    }
+
+    for (x = 0; x < maximum; x += step) {
+
+        KernLog("%C", shcol);
+        KernLog("[%p] ", (ulong)address + (ulong)x);
+
+        for (int i = 0; i < step; i++) {
+            KernLog("%02x ", (uchar)sector[i+x]);
+        }
+
+        KernLog("   %C ", VGA_COLOR_LIGHT_BLUE);
+
+        for (int i = 0; i < step; i++) {
+            if (isprint(sector[i+x]))
+                KernLog("%c",
+                        sector[i+x]
+                        );
+            else
+                KernLog("%c", 0);
+        }
+
+        KernLog("\n");
+    }
+    return EOK;
+}
+
 error_t CmdHelp(int argc, char **argv, char *cmdline)
 {
     uint i, count = 0;
@@ -233,6 +289,7 @@ Command_t shcmdtable[] =
     { "exit",       CmdQuit,            "Initiate shutdown"                 },
     { "help",       CmdHelp,            "Show this message"                 },
     { "march",      CmdStarWars,        "Play the Imperial March"           },
+    { "memdump",  CmdDumpMem,        "Dump memory starting from addr to end"},
     { "mmap",       CmdMemMap,          "Show memory map"                   },
     { "musage",     CmdMemUsage,        "Show memory statistics"            },
     { "prompt",     CmdPrompt,          "Change shell prompt"               },
diff --git a/kaleid/kernel/sh/testcmds.c b/kaleid/kernel/sh/testcmds.c
index 6156629..2cb2858 100644
--- a/kaleid/kernel/sh/testcmds.c
+++ b/kaleid/kernel/sh/testcmds.c
@@ -111,41 +111,6 @@ error_t CmdDumpATASect(int argc, char **argv, char *cmdline)
     return EOK;
 }
 
-error_t CmdDumpMem(int argc, char **argv, char *cmdline)
-{
-    char sector[8] = {0};
-    char *address = (char*)strtoul(argv[1], NULL, 16);
-    int nb = 1; //atoi(argv[2]);
-    int x = 0;
-    int step = 8;
-
-    KernLog("Address begin: %p\n", address);
-
-    for (int i = 0; i < 8*nb; i++) {
-        sector[i] = *address++;
-    }
-
-    while(x < 8*nb) {
-        KernLog("%C", shcol);
-        for (int i = 0; i < step; i++) {
-            KernLog("%02x ", (uchar)sector[i+x]);
-        }
-        KernLog("   %C ", VGA_COLOR_LIGHT_BLUE);
-        for (int i = 0; i < step; i++) {
-            if (isprint(sector[i+x]))
-                KernLog("%c",
-                        sector[i+x]
-                        );
-            else
-                KernLog("%c", 0);
-        }
-        KernLog("\n");
-        x += step;
-    }
-
-    return EOK;
-}
-
 error_t CmdFloatDiv(int argc, char **argv, char *cmdline)
 {
     double a = (double)atoi(argv[1]);
@@ -352,7 +317,6 @@ static Command_t testcmdtable[] =
     { "args",       CmdArgs,           "Print command line"                   },
     { "atoi",       CmdAtoi,           "Print command line atoised"           },
     { "dmpsec",     CmdDumpATASect,    "Dump an ATA sector on screen"         },
-    { "dmp",        CmdDumpMem,        "Dump 1MB of memory starting from addr"},
     { "help",       CmdHelpTest,       "Show this message"                    },
     { "div",        CmdFloatDiv,     "Float div. Usage : div a b. Returns a/b"},
     { "transvtp",   CmdPageTranslateVirtToPhy,  "Translate a virtual to"