Illegal opcodes (was Re: [stella] Reading Paddles?)

["Dennis Debro" <ddebro@xxxxxxxxxxxxx>]

Hi Thomas,
 
> BIT is very useful. I have been explaining BIT tricks several times.
> Search the archives! ;-).
> 
> BTW: I prefer using an undocumented (illegal) NOP instead ($82 or
$$0c),
> because that doesn't change the flags. :-)

I had been studying your Robot City source. That's where I saw you use
the $0C opcode. I was confused and went to look up the illegal 6502
opcodes. I saw that it went to skip the next word.

I would recommend to anyone trying to tighten up ROM usage or cycles to
visit http://www.s-direktnet.de/homepages/k_nadj/opcodes.html or any
site similar.

Take care,
Dennis


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