Revision as of 22:08, 27 February 2025 edit RastaKins (talk \| contribs) Extended confirmed users 2,136 edits m →Table values: Fixed 1C entry ← Previous edit		Latest revision as of 13:53, 17 August 2025 edit undo RastaKins (talk \| contribs) Extended confirmed users 2,136 edits m →Example opcode table: grammar
Line 61: ==Example opcode table== This is the opcode table for the [[MOS Technology 6502]] microprocessor from 1975. The 6502 uses 8-bit opcodes. Of the 256 possible opcodes available using an 8-bit pattern, the original 6502 uses only 151 of them, organized into 56 instructions with (possibly) multiple [[addressing mode]]s.<ref name=ii>{{cite web \|url=http://nparker.llx.com/a2/opcodes.html \|title=The 6502/65C02/65C816 Instruction Set Decoded \|first=Neil \|last=Parker \|website=Neil Parker's Apple II page \|access-date=2019-07-16 \|archive-date=2019-07-16 \|archive-url=https://web.archive.org/web/20190716023057/http://nparker.llx.com/a2/opcodes.html \|url-status=live}}</ref> Because not all ~~the~~ 256 opcodes are ~~not~~ used, some opcode spaces are blank and the low nibble columns 3, 7, B, and F are missing from the table. {\| class="wikitable"

Opcode table: Difference between revisions