[Coco] Any reason to put a 6309 in a Coco2?

Neil Morrison neilsmorr at hotpop.com
Thu Jan 1 23:08:37 EST 2004



No. in fact they often jumped into the middle of an opcode to save a
byte. Everyone had to learn that if they used the rom code.

Neil

----- Original Message -----
From: "Torsten Dittel" <Torsten at Dittel.info>


> I think the opcodes in Microsoft BASIC weren't illegal, they just

did

> something useless. AFAIR some of the so called "illegal"

instructions of

> the 6809 had some effects on the registers including the CC which

just

> didn't make sense. I once saw a list somewhere were all the

"functions"

> of those opcodes were listed. I wonder if the emulators do this

well.

> Tim? Brad?





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