03630: Any EEPROM with an 8-bit data bus is not being saved correctly

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
03630	Core	Critical (emulation)	Always	Jan 2, 2010, 07:29	Jan 4, 2010, 01:49

Tester	Iaspis	View Status	Public	Platform	MAME (Official Binary)
Assigned To	aaron	Resolution	Fixed	OS	Windows Vista/7 (64-bit)
Status [?]	Resolved			Driver
Version	0.136	Fixed in Version	0.136u1	Build	Normal
		Fixed in Git Commit		Github Pull Request #

Summary	03630: Any EEPROM with an 8-bit data bus is not being saved correctly
Description	Example: thndrx2 - There seems to be a failure in the rom check screen (17F BAD), preventing this game and its clones from running.
Steps To Reproduce
Additional Information	In particular, Konami games seem most prone to show this error. asterix.c, gijoe.c, moo.c, tmnt.c, lethal.c, xmen.c, vendetta.c, mystwarr.c, simpsons.c, xexex.c, rungun.c, hornet.c, overdriv.c, konamigx.c and others.
Github Commit

Flags
Regression Version	0.136
Affected Sets / Systems

Attached Files	0000.png (646 bytes) Jan 2, 2010, 14:39
Attached Files	0001.png (1,384 bytes) Jan 2, 2010, 14:39

No.05363 Tafoid Administrator Jan 2, 2010, 14:18 edited on: Jan 3, 2010, 23:53	EDIT: Well, it appears to be a bug afterall. Not sure what happened, specifically, my complete test in 0.135u4 showed this as working with the F2+F3 procedure. In 0.136 - even after the procedure, the game shows it as bad. Odd. EDIT #2: Most of the games which the auto-initialize was taken off are affected. Drivers noted. EDIT #3: r7821 appears to be the culprit
No.05377 Tafoid Administrator Jan 3, 2010, 21:20 edited on: Jan 3, 2010, 23:51	Some inability to save eeproms correctly are noted in other drivers too - might be a MAME-wide issue., EDIT #2: This is infact an issue with 8-bit EEPROMS not being able to be saved correctly. Corrected bug description.