Hallo Spiro, > You do not happen to have "virtual device traps" (VDT) enabled? It was indeed. But disabling it didn't change things. Your explanation was very clear but doesn't explain why the ROM was changed. I could have understood if an instruction was replaced by BRK but it isn't. Please have a look at: www.baltissen.org/zip/VIC20.zip It contains the generated kernal, basic and cartridge file. The last one isn't even needed. The ZIP also contains a LST of my source code plus a printscreen of the area where it goes wrong. Some info: because I cannot emulate the Multi-ROM, I decided to use the cartridge area as a temporary expansion. Because of this weird problem, I decided to shift my attention to the C64. I hope that one works fine. -- Kind regards / Met vriendelijke groet, Ruud Baltissen www.Baltissen.org Message was sent through the cbm-hackers mailing listReceived on 2013-07-07 07:00:09
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