Differences between 65xx, 65Cxx and 65SCxx microprocessors

Part numberTechnologyMemory
(KB)
New
instructions
New
addressing
modes
On-chip
clock
oscillator
PackageSignals
6502NMOS64  Y40-pinIRQ NMI SO SYNC RDY
6503NMOS4  Y28-pinIRQ NMI
6504NMOS8  Y28-pinIRQ
6505NMOS4  Y28-pinIRQ RDY
6506NMOS4  Y28-pinIRQ
6507NMOS8  Y28-pinRDY
6512NMOS64  N40-pinIRQ NMI SO DBE SYNC RDY
6513NMOS4  N28-pinIRQ NMI
6514NMOS8  N28-pinIRQ
6515NMOS4  N28-pinIRQ RDY
65C02CMOS64122Y40-pinIRQ NMI SO SYNC RDY
65C102CMOS64122Y40-pinIRQ NMI SO BE SYNC RDY ML PH4
65C112CMOS64122N40-pinIRQ NMI SO BE SYNC RDY ML
65SC02CMOS6482Y40-pinIRQ NMI SO SYNC RDY
65SC03CMOS482N28-pinIRQ NMI
65SC04CMOS882N28-pinIRQ
65SC05CMOS482N28-pinIRQ RDY
65SC06CMOS482N28-pinIRQ
65SC07CMOS882N28-pinRDY
65SC12CMOS6482N40-pinIRQ NMI SO DBE SYNC
65SC13CMOS482N28-pinIRQ NMI
65SC14CMOS882N28-pinIRQ
65SC15CMOS482N28-pinIRQ RDY
65SC102CMOS6482Y40-pinIRQ NMI SO BE SYNC RDY ML PH4
65SC103CMOS482N28-pinIRQ NMI PH4
65SC104CMOS882N28-pinIRQ PH4
65SC105CMOS482N28-pinIRQ RDY PH4
65SC106CMOS482N28-pinIRQ PH4
65SC107CMOS882N28-pinRDY PH4
65SC112CMOS6482N40-pinIRQ NMI SO BE SYNC RDY ML
65SC115CMOS482N28-pinIRQ 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:

BE - Bus Enable
DBE - Data bus enable
PH4 - Phase 4
IRQ - Interrupt request
ML - Memory lock
NMI - Non-maskable interrupt
RDY - Ready
SO - Set overflow
SYNC - Synchronize
Comments

Last modified: 17 Oct 2013
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