Some useful articles I was reading only this morning: Why they exist : http://www.pagetable.com/?p=39 What they are: http://www.ffd2.com/fridge/docs/6502-NMOS.extra.opcodes Rob -----Original Message----- From: email@example.com [mailto:firstname.lastname@example.org] On Behalf Of didier derny Sent: 04 November 2011 17:02 To: email@example.com Subject: 6502 illegal opcodes Hi, In my cbm 8032 emulator I'm planning to have some support for illegal opcodes I saw 3 type of illegal opcodes - nop, no visible action - hlt kill the cpu - xxx have an action are they reliable from a 6502 to another ? (for example mos vs rockwell vs synertek) or between 6502, 6509, 6510 ? I'm planning to support non and halt and let the others not processed (my be in a futur version). any idea ? -- didier Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing listReceived on 2011-11-04 17:00:24
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