static int prev_line_cnt_irq3 = 0, prev_line_cnt_irq5 = 0;
static int fifo_bytes_line = (16000<<16)/60/262/2;
+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 = (PicoPicohw.r12 & 0xf) ? 16000 : 8000;
+ 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;
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");
- SekInterrupt(3);
- return;
- }
-
- if (PicoPicohw.fifo_bytes == 16) {
- prev_line_cnt_irq3 = PicoPicohw.line_counter;
- elprintf(EL_ANOMALY, "irq3, fb=%i", PicoPicohw.fifo_bytes);
+ elprintf(EL_PICOHW, "irq3");
SekInterrupt(3);
- PicoPicohw.fifo_bytes--;
return;
}
#endif
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