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Sonic CD runs on GP2X

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@21 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-01-19 22:08:50 +00:00
parent d1df87866b
commit b837b69b3f
20 changed files with 364 additions and 184 deletions
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75
Pico/cd/Sek.c
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@ -13,24 +13,79 @@
int SekCycleCntS68k=0; // cycles done in this frame
int SekCycleAimS68k=0; // cycle aim
#ifdef EMU_C68K
// ---------------------- Cyclone 68000 ----------------------
struct Cyclone PicoCpuS68k;
#endif
#ifdef EMU_M68K
// ---------------------- MUSASHI 68000 ----------------------
m68ki_cpu_core PicoS68kCPU; // Mega CD's CPU
#endif
static int irqs = 0; // TODO: 2 context
#ifdef EMU_M68K
int SekIntAckS68k(int level)
static int SekIntAckS68k(int level)
{
dprintf("s68kACK %i", level);
CPU_INT_LEVEL = 0;
int level_new = 0;
irqs &= ~(1 << level);
irqs &= Pico_mcd->s68k_regs[0x33];
if (irqs) {
level_new = 6;
while (level_new > 0) { if (irqs & (1 << level_new)) break; level_new--; }
}
dprintf("s68kACK %i -> %i", level, level_new);
CPU_INT_LEVEL = level_new << 8;
return M68K_INT_ACK_AUTOVECTOR;
}
#endif
#ifdef EMU_C68K
// interrupt acknowledgment
static void SekIntAck(int level)
{
int level_new = 0;
irqs &= ~(1 << level);
irqs &= Pico_mcd->s68k_regs[0x33];
if (irqs) {
level_new = 6;
while (level_new > 0) { if (irqs & (1 << level_new)) break; level_new--; }
}
dprintf("s68kACK %i -> %i", level, level_new);
PicoCpuS68k.irq = level_new;
}
static void SekResetAck()
{
dprintf("s68k: Reset encountered @ %06x", SekPcS68k);
}
static int SekUnrecognizedOpcode()
{
unsigned int pc, op;
pc = SekPcS68k;
op = PicoCpuS68k.read16(pc);
dprintf("Unrecognized Opcode %04x @ %06x", op, pc);
//exit(1);
return 0;
}
#endif
int SekInitS68k()
{
#ifdef EMU_C68K
// CycloneInit();
memset(&PicoCpuS68k,0,sizeof(PicoCpuS68k));
PicoCpuS68k.IrqCallback=SekIntAck;
PicoCpuS68k.ResetCallback=SekResetAck;
PicoCpuS68k.UnrecognizedCallback=SekUnrecognizedOpcode;
#endif
#ifdef EMU_M68K
{
// Musashi is not very context friendly..
@ -52,6 +107,16 @@ int SekResetS68k()
{
if (Pico.rom==NULL) return 1;
#ifdef EMU_C68K
PicoCpuS68k.stopped=0;
PicoCpuS68k.osp=0;
PicoCpuS68k.srh =0x27; // Supervisor mode
PicoCpuS68k.flags=4; // Z set
PicoCpuS68k.irq=0;
PicoCpuS68k.a[7]=PicoCpuS68k.read32(0); // Stack Pointer
PicoCpuS68k.membase=0;
PicoCpuS68k.pc=PicoCpuS68k.checkpc(PicoCpuS68k.read32(4)); // Program Counter
#endif
#ifdef EMU_M68K
{
void *oldcontext = m68ki_cpu_p;
@ -67,6 +132,10 @@ int SekResetS68k()
int SekInterruptS68k(int irq)
{
irqs |= 1 << irq;
#ifdef EMU_C68K
PicoCpuS68k.irq=irq;
#endif
#ifdef EMU_M68K
void *oldcontext = m68ki_cpu_p;
m68k_set_context(&PicoS68kCPU);