Differences between 65xx, 65Cxx and 65SCxx microprocessors

Part number	Technology	Memory (KB)	New instructions	New addressing modes	On-chip clock oscillator	Package	Signals
6502	NMOS	64			Y	40-pin	IRQ NMI SO SYNC RDY
6503	NMOS	4			Y	28-pin	IRQ NMI
6504	NMOS	8			Y	28-pin	IRQ
6505	NMOS	4			Y	28-pin	IRQ RDY
6506	NMOS	4			Y	28-pin	IRQ
6507	NMOS	8			Y	28-pin	RDY
6512	NMOS	64			N	40-pin	IRQ NMI SO DBE SYNC RDY
6513	NMOS	4			N	28-pin	IRQ NMI
6514	NMOS	8			N	28-pin	IRQ
6515	NMOS	4			N	28-pin	IRQ RDY
65C02	CMOS	64	12	2	Y	40-pin	IRQ NMI SO SYNC RDY
65C102	CMOS	64	12	2	Y	40-pin	IRQ NMI SO BE SYNC RDY ML PH4
65C112	CMOS	64	12	2	N	40-pin	IRQ NMI SO BE SYNC RDY ML
65SC02	CMOS	64	8	2	Y	40-pin	IRQ NMI SO SYNC RDY
65SC03	CMOS	4	8	2	N	28-pin	IRQ NMI
65SC04	CMOS	8	8	2	N	28-pin	IRQ
65SC05	CMOS	4	8	2	N	28-pin	IRQ RDY
65SC06	CMOS	4	8	2	N	28-pin	IRQ
65SC07	CMOS	8	8	2	N	28-pin	RDY
65SC12	CMOS	64	8	2	N	40-pin	IRQ NMI SO DBE SYNC
65SC13	CMOS	4	8	2	N	28-pin	IRQ NMI
65SC14	CMOS	8	8	2	N	28-pin	IRQ
65SC15	CMOS	4	8	2	N	28-pin	IRQ RDY
65SC102	CMOS	64	8	2	Y	40-pin	IRQ NMI SO BE SYNC RDY ML PH4
65SC103	CMOS	4	8	2	N	28-pin	IRQ NMI PH4
65SC104	CMOS	8	8	2	N	28-pin	IRQ PH4
65SC105	CMOS	4	8	2	N	28-pin	IRQ RDY PH4
65SC106	CMOS	4	8	2	N	28-pin	IRQ PH4
65SC107	CMOS	8	8	2	N	28-pin	RDY PH4
65SC112	CMOS	64	8	2	N	40-pin	IRQ NMI SO BE SYNC RDY ML
65SC115	CMOS	4	8	2	N	28-pin	IRQ RDY ML

The list of differences is not complete. CMOS 65Cxx and 65SCxx CPUs also differ from NMOS 65xx microprocessors in a way how they handle certain conditions or instructions, such as CPU reset, execution of invalid op-codes, etc.

Signal abbreviations: