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cd: switch to CD drive emu code from genplus

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same license, much cleaner code
This commit is contained in:
notaz 2013-10-06 21:08:07 +03:00
parent 3f23709ef3
commit 274fcc35aa
25 changed files with 1798 additions and 1824 deletions
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19
pico/cd/memory.c
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@ -407,8 +407,11 @@ void s68k_reg_write8(u32 a, u32 d)
elprintf(EL_CDREGS|EL_CD, "s68k irq mask: %02x", d);
d &= 0x7e;
if ((d ^ Pico_mcd->s68k_regs[0x33]) & d & PCDS_IEN4) {
if (Pico_mcd->s68k_regs[0x37] & 4)
CDD_Export_Status();
// XXX: emulate pending irq instead?
if (Pico_mcd->s68k_regs[0x37] & 4) {
elprintf(EL_INTS, "cdd export irq 4 (unmask)");
SekInterruptS68k(4);
}
}
break;
case 0x34: // fader
@ -418,15 +421,21 @@ void s68k_reg_write8(u32 a, u32 d)
return; // d/m bit is unsetable
case 0x37: {
u32 d_old = Pico_mcd->s68k_regs[0x37];
Pico_mcd->s68k_regs[0x37] = d&7;
Pico_mcd->s68k_regs[0x37] = d & 7;
if ((d&4) && !(d_old&4)) {
CDD_Export_Status();
// ??
pcd_event_schedule_s68k(PCD_EVENT_CDC, 12500000/75);
if (Pico_mcd->s68k_regs[0x33] & PCDS_IEN4) {
elprintf(EL_INTS, "cdd export irq 4");
SekInterruptS68k(4);
}
}
return;
}
case 0x4b:
Pico_mcd->s68k_regs[a] = (u8) d;
CDD_Import_Command();
cdd_process();
return;
case 0x58:
return;