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OK, This is Rich again. I found those Op. Codes for you. If you need any of the other material on them, they are in the 18th issue of Hardcore Computist. Other than this list of Op. Codes, all there is on the 65c02 is a Question/Answer section. So here's the list: _____________________________________________________________________ | | | New Instructions | | ------------------------------------------------ | | | | Instructions Op Code Description | | ------------ ------- ----------- | | BRA 80 Branch Alway (Realitive) | | PHX DA Push X on Stack | | PHY 5A Push Y on Stack | | PLX FA Pull X from stack | | PLY 7A Pull Y from Stack | | STZ 9C Store a zero in memory (Absolute) | | STZ 9E Store a zero in memory (Absolute,X) | | STZ 64 Store a zero in memory (Zero page) | | STZ 74 Store a zero in memory (Zero page,X)| | TRB 1C Test + reset bits w/Accum. (Absolute) | TRB 14 Test + reset bits w/accum. (0 Page) | | TSB 0C Test + set bits w/accum. (Absolute) | | TSB 04 Test + set bits w/accum. ( 0 Page) | | | |___________________________________________________________________| _____________________________________________________________________ | | | Additional Instruction Addressing Modes | | ------------------------------------------------------ | | | | | | Instruction Op Code Description | | ----------- ------- ----------- | | ADC 72 Add memory to Accum. w/carry (Zero Page| | AND 32 AND memory with Accum. (Zero Page) | | BIT 3C Test mem. bits w/Accum.(Zero Page,X) | | BIT 34 " " " " " " " " | | CMP D2 Compare mem. w/Accum.(Zero Page,X) | | EOR 52 Exclusive OR w/Accum.(Zero Page) | | JMP 7C Jump (Absolute(Indirect,X)) | | LDA B2 Load Accum. W/memory (Zero page indir.)| | ORA 12 OR memory w/Accum. (Zero Page) | | SBC F2 Subtract from Accum. w/borrow (0 page) | | STA 92 Store Accum. in memory (Zero page) | |___________________________________________________________________| That's the best I can do. There were no further articles on the Instructions. I hope it helps you out. Catch you later. Some Dude (Rich)