05757: c64 c64p 2-Sided Converted To 1-Sided Images, Loop/Hang/Freeze: 2-sided images converted to 1-sided image after loading initial crack/menu screen(s) never run (remains blank screen endlessly)

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
05757	Crash/Freeze	Critical (emulation)	Always	Oct 22, 2014, 12:50	Feb 6, 2015, 05:37

Tester	trebor	View Status	Public	Platform	MESS (Official Binary)
Assigned To		Resolution	Open	OS	Windows Vista/7/8 (64-bit)
Status [?]	Confirmed			Driver	commodore/c64.cpp
Version	0.155	Fixed in Version		Build	Normal
		Fixed in Git Commit		Github Pull Request #

Summary	05757: c64 c64p 2-Sided Converted To 1-Sided Images, Loop/Hang/Freeze: 2-sided images converted to 1-sided image after loading initial crack/menu screen(s) never run (remains blank screen endlessly)
Description	Running a 1-sided image converted from an originally 2-sided image works perfectly under real hardware and (Win)Vice. Under MESS, after initial loader/crack screen(s), the game endlessly loads/hangs or freezes. Games impacted includes (but not necessarily exclusive to) Defender of the Crown and G.I. Joe. Reference and images found here: Defender of the Crown: http://csdb.dk/release/?id=19181 G.I. Joe: http://csdb.dk/release/?id=39978 Files uploaded to report as well for convenience.
Steps To Reproduce	mess.exe c64p -flop1 "C:\PATH TO IMAGE\DefenderOfTheCrown_1987_Cinemaware.d64" mess.exe c64p -joy1 joy -joy2 joy -flop1 "C:\PATH TO IMAGE\DefenderOfTheCrown_1987_Cinemaware.d64" Or mess.exe c64 -flop1 "C:\PATH TO IMAGE\DefenderOfTheCrown_1987_Cinemaware.d64" mess.exe c64 -joy1 joy -joy2 joy -flop1 "C:\PATH TO IMAGE\DefenderOfTheCrown_1987_Cinemaware.d64" And mess.exe c64 -flop1 "C:\PATH TO IMAGE\G.I.Joe.d64" mess.exe c64 -joy1 joy -joy2 joy -flop1 "C:\PATH TO IMAGE\G.I.Joe.d64" Or mess.exe c64p -flop1 "C:\PATH TO IMAGE\G.I.Joe.d64" mess.exe c64p -joy1 joy -joy2 joy -flop1 "C:\PATH TO IMAGE\G.I.Joe.d64"
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	c64 c64p 2-Sided Converted To 1-Sided Images, Loop/Hang/Freeze

Attached Files

No.11150 Haze Senior Tester Oct 22, 2014, 13:00	it should go without saying, but don't upload roms.
No.11151 trebor Tester Oct 22, 2014, 14:08	Sorry...Typically and usually, I would not. I was on the fence of whether it would be an issue in this case and was just trying to make it easier for testing/confirmation. Nonetheless, point noted.
No.11163 trebor Tester Oct 22, 2014, 18:37	One-side' California Games: http://csdb.dk/release/?id=72925 If you select "Skip Title Screen NO", after the (license plate) title screen appears, the game/emulator will load/loop indefinitely. However, if you select "Skip Title Screen YES", you will go into the game without issue ADDITIONALLY...and interestingly, in connection with the 'joy' problem, in this image/game, Players (1 & 2) map to P2 Controls [=Slot Joy2] and works without problems unlike the other games: Grog's Revenge, Friday the 13th, Bubble Bobble, G.I. Joe - where players are mapped to P2 Controls [=Slot Joy2] and there is no response. However, entering your name/typing key information results in odd/weird results. Sometimes it backspaces when hitting a letter or doubles letters to one adjacent to the key you are typing.
No.11441 peterferrie Developer Feb 6, 2015, 05:37	The IRQ0 is triggering so often that the 6510 never gets a chance to run any more instructions. For California Games, the IRQ enable routine begins at $334, last instruction to run is at $36B.