Opcode table: Difference between revisions

Revision as of 16:33, 27 February 2025

Latest revision as of 13:53, 17 August 2025

(One intermediate revision by the same user not shown)

Line 13:

|-

! scope="row" | 1

| 10 || 11 || 12 || 13 || 14 || 15 || 16 || 17 || 18 || 19 || 1A || 1B || 5C1C || 1D || 1E || 1F

|-

! scope="row" | 2

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"