02440: abcop, gprider1, rachero: abcop just shows a black flickering screen, rachero gives an error and crashes on exit

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
02440	Crash/Freeze	Critical (emulation)	Always	Sep 27, 2008, 03:19	Sep 28, 2008, 11:07

Tester	Smitdogg	View Status	Public	Platform	MAMEUI
Assigned To	couriersud	Resolution	Fixed	OS	Windows XP/Vista 64-bit
Status [?]	Resolved			Driver	sega/segaxbd.cpp
Version	0.127u5	Fixed in Version	0.127u6	Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	02440: abcop, gprider1, rachero: abcop just shows a black flickering screen, rachero gives an error and crashes on exit
Description	abcop just shows a black flickering screen, rachero gives an error message and crashed my pc when I hit Esc. I attached the error message.
Steps To Reproduce
Additional Information
Github Commit

Flags
Regression Version	0.127u1
Affected Sets / Systems	abcop, gprider1, rachero

Attached Files	x.png (1,980 bytes) Sep 27, 2008, 03:19

No.02606 Tafoid Administrator Sep 27, 2008, 04:55 edited on: Sep 27, 2008, 04:56	Added regression, confirmed on command-line and added another set in his driver which does not boot/hangs the emulation. I suspect changes to the 68000 core broke these games.
No.02624 couriersud Developer Sep 27, 2008, 21:47	timer_irq_state is only toggled a couple of times and stays off afterwards.
No.02626 aaron Developer Sep 27, 2008, 22:52	This is probably the issue I brought up on the list. IRQ changes should be processed at the start of execution, and not directly in the code that handles the IRQ changes. Right now, for example, if IRQ 2 is signalled and then IRQ 6, IRQ 2 will be pushed on the stack and then IRQ 6 will be taken, after which IRQ 2 will execute. This is wrong, since both were signalled and turned off simultaneously, IRQ 2 should never be hit.
No.02627 couriersud Developer Sep 28, 2008, 11:07	The fix committed takes that into account. If 2 & 6 would be signalled at the same time, only 6 will be signalled.