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Merge pull request #96 from 'techmetx11/master'

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* techmetx11/master:
  Add hack for unlicensed games that don't handle the Z80 bus properly
This commit is contained in:
kub 2023-11-01 22:35:37 +01:00
commit 5038e421e9
5 changed files with 39 additions and 6 deletions
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4
pico/memory.c
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@ -675,7 +675,7 @@ static void PicoWrite16_sram(u32 a, u32 d)
static u32 PicoRead8_z80(u32 a)
{
u32 d = 0xff;
if ((Pico.m.z80Run & 1) || Pico.m.z80_reset) {
if (((Pico.m.z80Run & 1) || Pico.m.z80_reset) && !(PicoIn.quirks & PQUIRK_NO_Z80_BUS_LOCK)) {
elprintf(EL_ANOMALY, "68k z80 read with no bus! [%06x] @ %06x", a, SekPc);
// open bus. Pulled down if MegaCD2 is attached.
return 0;
@ -699,7 +699,7 @@ static u32 PicoRead16_z80(u32 a)
static void PicoWrite8_z80(u32 a, u32 d)
{
if ((Pico.m.z80Run & 1) || Pico.m.z80_reset) {
if (((Pico.m.z80Run & 1) || Pico.m.z80_reset) && !(PicoIn.quirks & PQUIRK_NO_Z80_BUS_LOCK)) {
// verified on real hw
elprintf(EL_ANOMALY, "68k z80 write with no bus or reset! [%06x] %02x @ %06x", a, d&0xff, SekPc);
return;