04188: All sets in aristmk4.c: [debug] Hang immediately after start in debug build

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
04188	Crash/Freeze	Critical (emulation)	Always	Jan 16, 2011, 00:55	Jan 27, 2011, 09:20

Tester	Tafoid	View Status	Public	Platform	MAME (Self-compiled)
Assigned To		Resolution	Fixed	OS	Windows XP (32-bit)
Status [?]	Resolved			Driver	aristocrat/aristmk4.cpp
Version	0.141	Fixed in Version		Build	Debug
		Fixed in Git Commit		Github Pull Request #

Summary	04188: All sets in aristmk4.c: [debug] Hang immediately after start in debug build
Description	All games in the driver hang at a screen full of 0's immediately after starting.
Steps To Reproduce
Additional Information	There was a similar bug already, but probably not related: 04090
Github Commit

Flags	Debug build specific
Regression Version	0.141
Affected Sets / Systems	All sets in aristmk4.c

Attached Files	autmoon.png (5,057 bytes) Jan 16, 2011, 01:16 Uploaded by Tafoid Example snap (after -str 3).

No.07144 palindrome Tester Jan 27, 2011, 09:20 edited on: Jan 31, 2011, 06:47	The RTC implementation is causing the freeze. I believe this bug was introduced when the code was changed to use mc146818 instead of the custom RTC code. To work around the problem for now. change static READ8_HANDLER(mkiv_pia_ina) { return space->machine->device<mc146818_device>("rtc")->read(*space,1); } to static READ8_HANDLER(mkiv_pia_ina) { return 0; } This is still valid because the RNG doesn't seed from the RTC, so gameplay is not affected. In fact many jurisdictions did not have a requirement to have an RTC installed on the logic board at the time.

No.07144

palindrome

Tester

Jan 27, 2011, 09:20

edited on: Jan 31, 2011, 06:47

The RTC implementation is causing the freeze. I believe this bug was introduced when the code was changed to use mc146818 instead of the custom RTC code.

To work around the problem for now.

change

static READ8_HANDLER(mkiv_pia_ina)
{
    return space->machine->device<mc146818_device>("rtc")->read(*space,1);
}

to

static READ8_HANDLER(mkiv_pia_ina)
{

    return 0;
}

This is still valid because the RNG doesn't seed from the RTC, so gameplay is not affected. In fact many jurisdictions did not have a requirement to have an RTC installed on the logic board at the time.