first commit, enjoy

1 files changed, 94 insertions, 0 deletions

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+
+#include <gba_console.h>
+#include <gba_video.h>
+#include <gba_interrupt.h>
+#include <gba_systemcalls.h>
+#include <gba_input.h>
+#include <gba_sio.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+u32 getGameSize(void)
+{
+        if(*(vu32*)(0x08000004) != 0x51AEFF24)
+                return 0;
+        u32 i;
+        for(i = (1<<20); i < (1<<25); i<<=1)
+        {
+                vu16 *rompos = (vu16*)(0x08000000+i);
+                int j;
+                bool romend = true;
+                for(j = 0; j < 0x1000; j++)
+                {
+                        if(rompos[j] != j)
+                        {
+                                romend = false;
+                                break;
+                        }
+                }
+                if(romend) break;
+        }
+        return i;
+}
+//---------------------------------------------------------------------------------
+// Program entry point
+//---------------------------------------------------------------------------------
+int main(void) {
+//---------------------------------------------------------------------------------
+
+        // the vblank interrupt must be enabled for VBlankIntrWait() to work
+        // since the default dispatcher handles the bios flags no vblank handler
+        // is required
+        irqInit();
+        irqEnable(IRQ_VBLANK);
+
+        consoleDemoInit();
+        REG_JOYTR = 0;
+        // ansi escape sequence to set print co-ordinates
+        // /x1b[line;columnH
+        u32 i;
+        iprintf("\x1b[9;10HROM Dumper\n");
+        iprintf("\x1b[10;5HPlease look at the TV\n");
+        REG_HS_CTRL |= 6;
+        while (1) {
+                if((REG_HS_CTRL&4))
+                {
+                        REG_HS_CTRL |= 4;
+                        u32 gamesize = getGameSize();
+                        REG_JOYTR = gamesize;
+                        while((REG_HS_CTRL&4) == 0) ;
+                        REG_HS_CTRL |= 4;
+                        if(gamesize == 0)
+                        {
+                                REG_JOYTR = 0;
+                                continue; //nothing to read
+                        }
+                        //game in, send header
+                        for(i = 0; i < 0xC0; i+=4)
+                        {
+                                REG_JOYTR = *(vu32*)(0x08000000+i);
+                                while((REG_HS_CTRL&4) == 0) ;
+                                REG_HS_CTRL |= 4;
+                        }
+                        //wait for other side to choose
+                        while((REG_HS_CTRL&2) == 0) ;
+                        REG_HS_CTRL |= 2;
+                        if(REG_JOYRE == 0)
+                        {
+                                REG_JOYTR = 0;
+                                continue; //nothing to read
+                        }
+                        //dump the game
+                        for(i = 0; i < gamesize; i+=4)
+                        {
+                                REG_JOYTR = *(vu32*)(0x08000000+i);
+                                while((REG_HS_CTRL&4) == 0) ;
+                                REG_HS_CTRL |= 4;
+                        }
+                        REG_JOYTR = 0;
+                }
+                Halt();
+        }
+}
+
+