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 |
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