preliminary irq10 support

[pcsx_rearmed.git] / libpcsxcore / r3000a.c

diff --git a/libpcsxcore/r3000a.c b/libpcsxcore/r3000a.c
index 4888106..9b47936 100644 (file)
--- a/libpcsxcore/r3000a.c
+++ b/libpcsxcore/r3000a.c
@@ -191,6 +191,12 @@ void psxBranchTest() {
                                cdrLidSeekInterrupt();
                        }
                }
+               if (psxRegs.interrupt & (1 << PSXINT_IRQ10)) { // irq10 - controller port pin8
+                       if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_IRQ10].sCycle) >= psxRegs.intCycle[PSXINT_IRQ10].cycle) {
+                               psxRegs.interrupt &= ~(1 << PSXINT_IRQ10);
+                               irq10Interrupt();
+                       }
+               }
                if (psxRegs.interrupt & (1 << PSXINT_SPU_UPDATE)) { // scheduled spu update
                        if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SPU_UPDATE].sCycle) >= psxRegs.intCycle[PSXINT_SPU_UPDATE].cycle) {
                                psxRegs.interrupt &= ~(1 << PSXINT_SPU_UPDATE);
@@ -248,3 +254,42 @@ void psxExecuteBios() {
                SysPrintf("non-standard BIOS detected (%d, %08x)\n", i, psxRegs.pc);
 }
 
+// irq10 stuff, very preliminary
+static int irq10count;
+
+static void psxScheduleIrq10One(u32 cycles_abs) {
+       // schedule relative to frame start
+       u32 c = cycles_abs - rcnts[3].cycleStart;
+       assert((s32)c >= 0);
+       psxRegs.interrupt |= 1 << PSXINT_IRQ10;
+       psxRegs.intCycle[PSXINT_IRQ10].cycle = c;
+       psxRegs.intCycle[PSXINT_IRQ10].sCycle = rcnts[3].cycleStart;
+       new_dyna_set_event(PSXINT_IRQ10, c);
+}
+
+void irq10Interrupt() {
+       u32 prevc = psxRegs.intCycle[PSXINT_IRQ10].sCycle
+               + psxRegs.intCycle[PSXINT_IRQ10].cycle;
+
+       psxHu32ref(0x1070) |= SWAPu32(0x400);
+
+#if 0
+       s32 framec = psxRegs.cycle - rcnts[3].cycleStart;
+       printf("%d:%03d irq10 #%d %3d m=%d,%d\n", frame_counter,
+               (s32)((float)framec / (PSXCLK / 60 / 263.0f)),
+               irq10count, psxRegs.cycle - prevc,
+               (psxRegs.CP0.n.SR & 0x401) != 0x401, !(psxHu32(0x1074) & 0x400));
+#endif
+       if (--irq10count > 0)
+               psxScheduleIrq10One(prevc + PSXCLK / 60 / 263);
+}
+
+void psxScheduleIrq10(int irq_count, int x_cycles, int y) {
+       //printf("%s %d, %d, %d\n", __func__, irq_count, x_cycles, y);
+       u32 cycles_per_frame = Config.PsxType ? PSXCLK / 50 : PSXCLK / 60;
+       u32 cycles = rcnts[3].cycleStart + cycles_per_frame;
+       cycles += y * cycles_per_frame / (Config.PsxType ? 314 : 263);
+       cycles += x_cycles;
+       psxScheduleIrq10One(cycles);
+       irq10count = irq_count;
+}