01775: newtangl, troangel: Crash with Access Violation

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
01775	Crash/Freeze	Critical (emulator)	Always	May 2, 2008, 22:14	May 4, 2008, 13:23

Tester	Firewave	View Status	Public	Platform	MAME (Self-compiled)
Assigned To	robiza	Resolution	Fixed	OS
Status [?]	Resolved			Driver	irem/m57.cpp
Version	0.124u5	Fixed in Version	0.125	Build	Debug
		Fixed in Git Commit		Github Pull Request #

Summary	01775: newtangl, troangel: Crash with Access Violation
Description	----------------------------------------------------- Exception at EIP=00A0A84B (decodechar+0x039e): ACCESS VIOLATION While attempting to read memory at 0EF6D000 ----------------------------------------------------- EAX=0EF6D000 EBX=110A1000 ECX=00000100 EDX=00000000 ESI=00000000 EDI=00000000 EBP=0022FBB8 ESP=0022FBB8 As a note - a crash in these games was fixed in an earlier version of MAME.
Steps To Reproduce
Additional Information
Github Commit

Flags
Regression Version	> 0.124
Affected Sets / Systems	newtangl, troangel

Attached Files

No.00861 robiza Developer May 3, 2008, 06:30 edited on: May 3, 2008, 06:31	with a CLEAN compile?
No.00862 robiza Developer May 3, 2008, 09:47	very strange: different behaviour if you set DEBUG=1 maybe an alloc memory problem
No.00868 Haze Senior Tester May 3, 2008, 19:30	no, same crash with / without DEBUG=1 , looks like invalid / wrong gfxdecode structure.
No.00870 Haze Senior Tester May 3, 2008, 19:54	indeed, you can't decode the graphics like they're being decoded....
No.00871 Haze Senior Tester May 3, 2008, 20:27	basically it's a non sequential decode, it overlaps itself. the only way to decode this properly is to rearrange the rom before decoding, or just adapt the drawing to use 16x16 tiles..... I'm guessing it used to be right, but was changed for some reason??
No.00872 robiza Developer May 4, 2008, 12:51 edited on: May 4, 2008, 13:23	i think zsolt converted in a single gfxdecode partially reverted to the old code and fixed