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1 | #include "../PicoInt.h" |
2 | |
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3 | // x: 0x03c - 0x19d |
4 | // y: 0x1fc - 0x2f7 |
5 | // 0x2f8 - 0x3f3 |
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6 | picohw_state PicoPicohw; |
7 | |
8 | static int prev_line_cnt_irq3 = 0, prev_line_cnt_irq5 = 0; |
9 | |
10 | static void PicoLineHookPico(int count) |
11 | { |
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12 | PicoPicohw.line_counter += count; |
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13 | |
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14 | #if 1 |
15 | if ((PicoPicohw.r12 & 0x4003) && PicoPicohw.line_counter - prev_line_cnt_irq3 > 200) { |
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16 | prev_line_cnt_irq3 = PicoPicohw.line_counter; |
17 | // just a guess/hack, allows 101 Dalmantians to boot |
18 | elprintf(EL_ANOMALY, "irq3"); |
19 | SekInterrupt(3); |
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20 | return; |
21 | } |
22 | |
23 | if (PicoPicohw.fifo_bytes == 16) { |
24 | prev_line_cnt_irq3 = PicoPicohw.line_counter; |
25 | elprintf(EL_ANOMALY, "irq3, fb=%i", PicoPicohw.fifo_bytes); |
26 | SekInterrupt(3); |
27 | PicoPicohw.fifo_bytes--; |
28 | return; |
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29 | } |
30 | #endif |
31 | |
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32 | if ((PicoPicohw.line_counter & 3) == 0 || count > 10) |
33 | { |
34 | if (PicoPicohw.fifo_bytes > 0) |
35 | PicoPicohw.fifo_bytes--; |
36 | } |
37 | |
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38 | #if 0 |
39 | if (PicoPicohw.line_counter - prev_line_cnt_irq5 > 512) { |
40 | prev_line_cnt_irq5 = PicoPicohw.line_counter; |
41 | elprintf(EL_ANOMALY, "irq5"); |
42 | SekInterrupt(5); |
43 | } |
44 | #endif |
45 | } |
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46 | |
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47 | PICO_INTERNAL int PicoInitPico(void) |
48 | { |
49 | elprintf(EL_STATUS, "Pico detected"); |
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50 | PicoLineHook = PicoLineHookPico; |
51 | |
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52 | PicoAHW = PAHW_PICO; |
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53 | memset(&PicoPicohw, 0, sizeof(PicoPicohw)); |
54 | PicoPicohw.pen_pos[0] = 0x03c + 352/2; |
55 | PicoPicohw.pen_pos[1] = 0x200 + 252/2; |
56 | prev_line_cnt_irq3 = 0, prev_line_cnt_irq5 = 0; |
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57 | |
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58 | // map version register |
59 | PicoDetectRegion(); |
60 | elprintf(EL_STATUS, "a %x", Pico.m.hardware); |
61 | switch (Pico.m.hardware >> 6) { |
62 | case 0: PicoPicohw.r1 = 0x00; break; |
63 | case 1: PicoPicohw.r1 = 0x00; break; |
64 | case 2: PicoPicohw.r1 = 0x40; break; |
65 | case 3: PicoPicohw.r1 = 0x20; break; |
66 | } |
67 | |
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68 | return 0; |
69 | } |
70 | |