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; // fifo bytes/line. FIXME: other rates, modes
+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 = 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);
+}
static void PicoLinePico(int count)
{
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;
}
-
- if (PicoPicohw.fifo_bytes == 16) {
- prev_line_cnt_irq3 = PicoPicohw.line_counter;
- elprintf(EL_ANOMALY, "irq3, fb=%i", PicoPicohw.fifo_bytes);
- SekInterrupt(3);
- PicoPicohw.fifo_bytes--;
- return;
- }
#endif
if (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
PicoAHW = PAHW_PICO;
memset(&PicoPicohw, 0, sizeof(PicoPicohw));
- PicoPicohw.pen_pos[0] = 0x03c + 352/2;
- PicoPicohw.pen_pos[1] = 0x200 + 252/2;
+ PicoPicohw.pen_pos[0] = 0x03c + 320/2;
+ PicoPicohw.pen_pos[1] = 0x200 + 240/2;
prev_line_cnt_irq3 = prev_line_cnt_irq5 = 0;
// map version register