starting to separate platform-specific code to facilitate a PC build

[gbajam22] / src / gba / main.c

diff --git a/src/gba/main.c b/src/gba/main.c
new file mode 100644 (file)
index 0000000..068f3d1
--- /dev/null
+++ b/src/gba/main.c
@@ -0,0 +1,59 @@
+#include <math.h>
+#include "gbaregs.h"
+#include "intr.h"
+#include "debug.h"
+#include "game.h"
+#include "maxmod.h"
+
+static void vblank(void);
+static void nopfunc(void);
+
+int main(void)
+{
+       int i;
+       volatile uint16_t *cptr;
+
+       intr_init();
+
+       REG_WAITCNT = WAITCNT_PREFETCH | WAITCNT_ROM_2_1;
+
+       cptr = (uint16_t*)CRAM_BG_ADDR;
+       for(i=0; i<256; i++) {
+               int c = i >> 3;
+               *cptr++ = c | ((c >> 1) << 10);
+       }
+
+#ifndef NOSOUND
+       mmInitDefault(sound_data, 8);
+       mmStart(MOD_POPCORN, MM_PLAY_LOOP);
+#endif
+
+       screen_vblank = nopfunc;
+
+       intr_disable();
+       interrupt(INTR_VBLANK, vblank);
+       REG_DISPSTAT |= DISPSTAT_IEN_VBLANK;
+       unmask(INTR_VBLANK);
+
+       intr_enable();
+       gamescr();
+
+       for(;;);
+       return 0;
+}
+
+static void vblank(void)
+{
+       vblperf_count++;
+
+       screen_vblank();
+
+#ifndef NOSOUND
+       mmVBlank();
+       mmFrame();
+#endif
+}
+
+static void nopfunc(void)
+{
+}