Subject: Re: [stella] LXA illegal opcode? From: Thomas Jentzsch <tjentzsch@xxxxxx> Date: Wed, 28 Jan 2004 19:45:50 +0100 |
Oliver Achten wrote: > Perhaps the best solution is to stick to the C64 documentation and avoid > unstable opcodes, since they seem to cause a malfunction in the 6502 bus > circuit, leading to processing undefined byte values. > Esapecially if you notice that the behaviour is strongly influenced by the > electrical design of the bus. I agree. I just checked again on my three PAL 2600s: - Six Switcher: behaves like in the C64 documentation (ora #$ee) - Darth Vader: like Dennis mentioned - Chinese Jr: both don't work. Let's just stick to the stable "illegal" opcodes. Have fun! Thomas _______________________________________________________ Thomas Jentzsch | *** Every bit is sacred ! *** tjentzsch at web dot de | ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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Re: [stella] LXA illegal opcode?, Oliver Achten | Thread | [stella] what about other illegal o, Glenn Saunders |
Re: [stella] what about other illeg, Thomas Jentzsch | Date | [stella] Releasing my unfinished pr, Oliver Achten |
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