On Friday 04 November 2011, you wrote: > Opcodes $8b and $ab are not predictable in that their result depends on > various analog effects; their behaviour can vary on a single physical > chip when it heats up, even. these are predictable though - if you choose the right argument :) not that ane #$00 is terribly useful =P > Various opcodes are unpredictable in the sense that their result depends > on what happens on the data bus while RDY is low. i would not call that unpredictable - on the c64 for example just make sure you dont execute them in a badline (or to be exact: make sure the vic does not try to fetch data while the opcode is executed), then they work predictable. they are just unpredictable in the sense that it is somewhat uncommon and unexpected that such thing would have an affect on the result of a cpu instruction :) -- http://www.hitmen-console.org http://magicdisk.untergrund.net http://www.pokefinder.org http://ftp.pokefinder.org Ein Zyniker ist ein Schuft, dessen mangelhafte Wahrnehmung Dinge sieht wie sie sind, statt wie sie sein sollten. <Ambrose Bierce> Message was sent through the cbm-hackers mailing listReceived on 2011-11-04 22:00:07
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