1 #include "../PicoInt.h"
6 picohw_state PicoPicohw;
8 static int prev_line_cnt_irq3 = 0, prev_line_cnt_irq5 = 0;
9 static int fifo_bytes_line = (16000<<16)/60/262/2;
11 PICO_INTERNAL void PicoReratePico(void)
13 int rate = (PicoPicohw.r12 & 0xf) ? 16000 : 8000;
15 fifo_bytes_line = (rate<<16)/50/312/2;
16 else fifo_bytes_line = (rate<<16)/60/262/2;
17 PicoPicoPCMRerate(rate);
20 static void PicoLinePico(int count)
22 PicoPicohw.line_counter += count;
25 if ((PicoPicohw.r12 & 0x4003) && PicoPicohw.line_counter - prev_line_cnt_irq3 > 200) {
26 prev_line_cnt_irq3 = PicoPicohw.line_counter;
27 // just a guess/hack, allows 101 Dalmantians to boot
28 elprintf(EL_ANOMALY, "irq3");
33 if (PicoPicohw.fifo_bytes == 16) {
34 prev_line_cnt_irq3 = PicoPicohw.line_counter;
35 elprintf(EL_ANOMALY, "irq3, fb=%i", PicoPicohw.fifo_bytes);
37 PicoPicohw.fifo_bytes--;
42 if (PicoPicohw.fifo_bytes > 0)
44 PicoPicohw.fifo_line_bytes += fifo_bytes_line * count;
45 if (PicoPicohw.fifo_line_bytes >= (1<<16)) {
46 PicoPicohw.fifo_bytes -= PicoPicohw.fifo_line_bytes >> 16;
47 PicoPicohw.fifo_line_bytes &= 0xffff;
48 if (PicoPicohw.fifo_bytes < 0)
49 PicoPicohw.fifo_bytes = 0;
53 PicoPicohw.fifo_line_bytes = 0;
56 if (PicoPicohw.line_counter - prev_line_cnt_irq5 > 512) {
57 prev_line_cnt_irq5 = PicoPicohw.line_counter;
58 elprintf(EL_ANOMALY, "irq5");
64 static void PicoResetPico(void)
67 PicoPicohw.xpcm_ptr = PicoPicohw.xpcm_buffer;
70 PICO_INTERNAL int PicoInitPico(void)
72 elprintf(EL_STATUS, "Pico detected");
73 PicoLineHook = PicoLinePico;
74 PicoResetHook = PicoResetPico;
77 memset(&PicoPicohw, 0, sizeof(PicoPicohw));
78 PicoPicohw.pen_pos[0] = 0x03c + 320/2;
79 PicoPicohw.pen_pos[1] = 0x200 + 240/2;
80 prev_line_cnt_irq3 = prev_line_cnt_irq5 = 0;
82 // map version register
84 switch (Pico.m.hardware >> 6) {
85 case 0: PicoPicohw.r1 = 0x00; break;
86 case 1: PicoPicohw.r1 = 0x00; break;
87 case 2: PicoPicohw.r1 = 0x40; break;
88 case 3: PicoPicohw.r1 = 0x20; break;