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some Pico work

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@442 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2008-05-07 18:53:53 +00:00
parent 406c96c547
commit d49b10c2f2
5 changed files with 75 additions and 28 deletions
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40
Pico/Pico/Pico.c
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@ -3,14 +3,48 @@
// x: 0x03c - 0x19d
// y: 0x1fc - 0x2f7
// 0x2f8 - 0x3f3
int PicoPicoPenPos[2] = { 0x3c, 0x200 };
int PicoPicoPage = 0; // 0-6
picohw_state PicoPicohw;
static int prev_line_cnt_irq3 = 0, prev_line_cnt_irq5 = 0;
static void PicoLineHookPico(int count)
{
PicoPicohw.line_counter += count;
if ((PicoPicohw.line_counter & 0xf) == 0 || count > 10)
{
if (PicoPicohw.fifo_bytes > 0)
PicoPicohw.fifo_bytes--;
}
#if 0
if (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);
}
#endif
#if 0
if (PicoPicohw.line_counter - prev_line_cnt_irq5 > 512) {
prev_line_cnt_irq5 = PicoPicohw.line_counter;
elprintf(EL_ANOMALY, "irq5");
SekInterrupt(5);
}
#endif
}
PICO_INTERNAL int PicoInitPico(void)
{
elprintf(EL_STATUS, "Pico detected");
PicoLineHook = PicoLineHookPico;
PicoAHW = PAHW_PICO;
PicoPicoPage = 0;
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;
return 0;
}