00053: slither: [possible] NVRAM and service mode problem.

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
00053	Misc.	Minor	Have not tried	Jan 18, 2008, 18:01	Apr 14, 2012, 11:32

Tester	Tafoid	View Status	Public	Platform
Assigned To		Resolution	Open	OS
Status [?]	Confirmed			Driver	taito/invqix.cpp
Version	0.121u2	Fixed in Version		Build
		Fixed in Git Commit		Github Pull Request #

Summary	00053: slither: [possible] NVRAM and service mode problem.
Description	I create a fresh NVRAM (start and use Player 2 Start to save) - then use F2 to enter test mode. Looking at the rom loaded into 2nd CPU (CPU#1 in debug), you can see the text for the first screen in service mode as well as a "sound test" text following (&hfa16 onward). "USE FIRE UP FOR NEXT MENU" is listed, but doesn't function. EDIT: According to the manual , this brings you to the "Location Programming" menu, which is what you see initially with an unwritten NVRAM (mentioned above). None of the inputs that are listed on that page respond except for F2, which brings you to Location Programming. With all the extra text in the roms, there may be a special method to get to sound tests and adjusting other game values.
Steps To Reproduce
Additional Information
Github Commit

Flags	Possible
Regression Version	< 0.37b16
Affected Sets / Systems	slither

Attached Files

No.08452 B2K24 Senior Tester Apr 14, 2012, 08:56	Using 0.145u6 when launch slither I get message "Invalid MC6845 screen parameters - display disabled !!!" Also, just like in description I can access service mode, but can't get game playing.
No.08453 Tafoid Administrator Apr 14, 2012, 11:32	http://mamedev.org/devwiki/index.php/FAQ:Games#Slither That will get you started. The popup message is visible in many games using MC6845 but is harmless. Thought that was made a debug popup.. if not, it probably should be.