picohw_state PicoPicohw;
static int prev_line_cnt_irq3 = 0, prev_line_cnt_irq5 = 0;
+static int fifo_bytes_line = (16000<<16)/60/262/2;
-static void PicoLineHookPico(int count)
+static const int guessed_rates[] = { 8000, 14000, 12000, 14000, 16000, 18000, 16000, 16000 }; // ?
+
+#define PICOHW_FIFO_IRQ_THRESHOLD 12
+
+PICO_INTERNAL void PicoReratePico(void)
{
+ int rate = guessed_rates[PicoPicohw.r12 & 7];
+ if (Pico.m.pal)
+ fifo_bytes_line = (rate<<16)/50/312/2;
+ else fifo_bytes_line = (rate<<16)/60/262/2;
+ PicoPicoPCMRerate(rate);
+}
- PicoPicohw.line_counter += count;
- if ((PicoPicohw.line_counter & 0xf) == 0 || count > 10)
- {
- if (PicoPicohw.fifo_bytes > 0)
- PicoPicohw.fifo_bytes--;
- }
+static void PicoLinePico(void)
+{
+ PicoPicohw.line_counter++;
-#if 0
- if (PicoPicohw.line_counter - prev_line_cnt_irq3 > 200) {
+#if 1
+ if ((PicoPicohw.r12 & 0x4003) && PicoPicohw.line_counter - prev_line_cnt_irq3 > 200) {
prev_line_cnt_irq3 = PicoPicohw.line_counter;
// just a guess/hack, allows 101 Dalmantians to boot
- elprintf(EL_ANOMALY, "irq3");
+ elprintf(EL_PICOHW, "irq3");
+ SekInterrupt(3);
+ return;
+ }
+#endif
+
+ if (PicoPicohw.fifo_bytes > 0)
+ {
+ PicoPicohw.fifo_line_bytes += fifo_bytes_line;
+ if (PicoPicohw.fifo_line_bytes >= (1<<16)) {
+ PicoPicohw.fifo_bytes -= PicoPicohw.fifo_line_bytes >> 16;
+ PicoPicohw.fifo_line_bytes &= 0xffff;
+ if (PicoPicohw.fifo_bytes < 0)
+ PicoPicohw.fifo_bytes = 0;
+ }
+ }
+ else
+ PicoPicohw.fifo_line_bytes = 0;
+
+#if 1
+ if (PicoPicohw.fifo_bytes_prev >= PICOHW_FIFO_IRQ_THRESHOLD &&
+ PicoPicohw.fifo_bytes < PICOHW_FIFO_IRQ_THRESHOLD) {
+ prev_line_cnt_irq3 = PicoPicohw.line_counter; // ?
+ elprintf(EL_PICOHW, "irq3, fb=%i", PicoPicohw.fifo_bytes);
SekInterrupt(3);
}
+ PicoPicohw.fifo_bytes_prev = PicoPicohw.fifo_bytes;
#endif
#if 0
if (PicoPicohw.line_counter - prev_line_cnt_irq5 > 512) {
prev_line_cnt_irq5 = PicoPicohw.line_counter;
- elprintf(EL_ANOMALY, "irq5");
+ elprintf(EL_PICOHW, "irq5");
SekInterrupt(5);
}
#endif
}
-PICO_INTERNAL int PicoInitPico(void)
+static void PicoResetPico(void)
+{
+ PicoPicoPCMReset();
+ PicoPicohw.xpcm_ptr = PicoPicohw.xpcm_buffer;
+}
+
+PICO_INTERNAL void PicoInitPico(void)
{
elprintf(EL_STATUS, "Pico detected");
- PicoLineHook = PicoLineHookPico;
+ PicoLineHook = PicoLinePico;
+ PicoResetHook = PicoResetPico;
PicoAHW = PAHW_PICO;
memset(&PicoPicohw, 0, sizeof(PicoPicohw));
- PicoPicohw.pen_pos[0] = 0x03c + 352/2;
- PicoPicohw.pen_pos[1] = 0x200 + 252/2;
- prev_line_cnt_irq3 = 0, prev_line_cnt_irq5 = 0;
+ PicoPicohw.pen_pos[0] = 0x03c + 320/2;
+ PicoPicohw.pen_pos[1] = 0x200 + 240/2;
+ prev_line_cnt_irq3 = prev_line_cnt_irq5 = 0;
- return 0;
+ // map version register
+ PicoDetectRegion();
+ switch (Pico.m.hardware >> 6) {
+ case 0: PicoPicohw.r1 = 0x00; break;
+ case 1: PicoPicohw.r1 = 0x00; break;
+ case 2: PicoPicohw.r1 = 0x40; break;
+ case 3: PicoPicohw.r1 = 0x20; break;
+ }
}