Date   : Sat, 16 Sep 2000 20:35:15 +0100
From   : jgh@... (Jonathan Graham Harston)
Subject: Re: FRAK!

Thomas Harte <t.harte@...> wrote:
>>  > Zalaga's sprite routines were written almost solely with undocumented
>>  > opcodes which just happened to do the right things
>
>So, does the Rockwell not do the unofficial opcodes? The only documentation
>I have seen claims that the only way not to get the unofficial opcodes is to
>switch NMOS to CMOS (or the other way, I forget), which also changes which
>instructions do care about low byte to high byte carry, and therefore is not
>what Acorn have done.
>
>So, what exactly is the deal with the Rockwell & the unofficial ops?
 
http://www.mdfsnet.f9.co.uk/Docs/Comp/6502/OpList might be useful.
 
-- 
J.G.Harston (JGH BBC PD Library) 70 Camm Street, Walkley, SHEFFIELD S6 3TR
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