*[https://www.pagetable.com/c64ref/6502/?tab=2 6502 Family CPU Reference]
*[https://llx.com/Neil/a2/opcodes.html The 6502/65C02/65C816 Instruction Set Decoded]
*[https://www.nesdev.org/wiki/CPU_unofficial_opcodes Opcode matrix arrangement]
*[https://www.oxyron.de/html/opcodes02.html Oxyron Opcode Matrix]
*[[Media:SY6500 - SY65C02 datasheet.pdf]] - provides a detailed breakdown of the machine cycles