Topic: Mysterious Stones Driver

[iq_132]

Here's a driver for Mysterious Stones. 

Games supported on this hardware:
Mysterious Stones - Dr. John's Adventure
Mysterious Stones - Dr. Kick in Adventure

Sound, high color, savestates, etc., are all supported.


Known bugs:
The airplane sound is not correct
The game is running a bit fast (the AY8910 emulation causes severe problems at the proper refresh rate)
Randomly freezes?

Also, you'll need to update the m6502 core a bit:

Just replace the old m6502Scan with this (in src/cpu/m6502/m6502.cpp)

Code: [Select]

int m6502Scan(int nAction)
{
if ((nAction & ACB_DRIVER_DATA) == 0) {
return 0;
}

for (int i = 0; i < MAX_CPU; i++) {
m6502_regs = &m6502_active_cpu_regs[i];

SCAN_VAR(A);
SCAN_VAR(X);
SCAN_VAR(Y);
SCAN_VAR(P);
SCAN_VAR(S);
SCAN_VAR(PC);
SCAN_VAR(nTotalCycles);
}

return 0;
}

Also x2, if you're not using 0.2.96.73+ as your codebase, you'll need to change this
HARDWARE_MISC_PRE90S
to this
HARDWARE_MISC_MISC

[hxghwx]

Edit and translate with the VC, circulate a mistake

[Barry Harris]

VC doesn't like the M6502 core. It's the same for mole - although that one doesn't crash the app.

[Barry Harris]

It looks the app crash is down to an error in the AY8910 initialisation.

Change line 14 from this;

Code: [Select]

static short *pAY8910Buffer[3], *pFMBuffer = NULL;
to this;

Code: [Select]

static short *pAY8910Buffer[6], *pFMBuffer = NULL;
That will stop the app crash - game still doesn't work though. None of the M6502 based games do in VC builds.

[iq_132]

Oops!  I'll have to set up the VC environment in a day or so and see if I can track down the m6502 issues.