MOS Technology 6502 microprocessor family

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  650x
  • » 8-bit CPU
  • » Up to 14 MHz
  • » 64 KB RAM
  • » 256 bytes stack
  • » No I/O ports
28 or 40-pin DIP
44-pin plastic LCC
6800
  • » Up to 2 MHz
8080
  • » Up to 4 MHz
  • » 256 I/O ports
65816
  • » 16-bit CPU
  • » 8-bit data bus
  • » Up to 14 MHz
  • » 16 MB RAM
  • » 6502 emulation mode
40-pin DIP
44-pin PLCC
MOS Technology 6502 and other 650x/651x processors are a family of inexpensive 8-bit microprocessors. 6502 and 6512 processors could address 64KB of memory, other CPUs in the family could address up to 8 KB. Stack size of the 6502 was limited to 256 bytes. The processors had only 6 registers, and only one of these registers - an accumulator - could be used for arithmetic and logic operations. The 6502 microprocessor had 13 addressing modes, some of these modes made extensive use of two 8-bit index registers. The processor didn't have I/O instructions, therefore 6502-based computers used memory mapped I/O.

All microprocessors in the NMOS 6502/650x family are software compatible between each other - the differences between CPUs are in hardware (different maximum size of addressed memory, clock oscillator is on-board or external, interrupt input options). CMOS 65Cxx and 65SCxx microprocessors add new instructions and addressing modes, and new hardware features such as memory lock and bus enable signals. For more information please see list of differences between 65xx, 65Cxx and 65SCxx CPUs.

Computers
Apple I, Apple II series (except for Apple IIgs), Apple III, Atari 400, Atari 800, Commodore PET 2001, Commodore 64, Commodore 128D (also had Z80), Acorn Microcomputer. Franklin ACE 1200 (also had Z80), etc. List of machines using 6502 CPU
Links
Use the filter below to display manufacturers that have specific feature(s) incorporated:

List of 650x manufacturers

CMD G65SC02PEI-4

4 MHz
Extended temperature range
44-pin plastic LCC

Picture of: CMD G65SC02PEI-4

CSG 6510CBM

40-pin plastic DIP

Picture of: CSG 6510CBM

GTE G65SC02P-3

3 MHz
40-pin plastic DIP

Picture of: GTE G65SC02P-3

Hua Ko Electronics HKE65SC02PL

40-pin plastic DIP

Picture of: Hua Ko Electronics HKE65SC02PL

MOS Technology MCS6502A

2 MHz
40-pin side-brazed ceramic DIP

Picture of: MOS Technology MCS6502A

NCR 65C02A

40-pin plastic DIP

Picture of: NCR 65C02A

NTE NTE6502

40-pin plastic DIP

Picture of: NTE NTE6502

Ricoh RP2A03E

40-pin plastic DIP

Picture of: Ricoh RP2A03E

Rockwell 338-6503 (65C02)

1 MHz?
40-pin plastic DIP

338-6503 is a custom part number for 65C02

Picture of: Rockwell 338-6503 (65C02)

Synertek SY6502B

3 MHz
40-pin ceramic DIP

Picture of: Synertek SY6502B

UMC UM6502A

2 MHz
40-pin plastic DIP

Picture of: UMC UM6502A

WDC W65C02S8P-10

10 MHz
40-pin plastic DIP

Picture of: WDC W65C02S8P-10

Use the filter below to display modifications that have specific feature(s) incorporated:

List of 650x modifications

CMD G65SC02P-2

2 MHz
40-pin plastic DIP

Picture of: CMD G65SC02P-2

MOS Technology MPS6508

40-pin plastic DIP

Picture of: MOS Technology MPS6508

MOS Technology 6510CBM

40-pin plastic DIP

Picture of: MOS Technology 6510CBM

Rockwell R6503P

1 MHz
28-pin plastic DIP

Picture of: Rockwell R6503P

Rockwell R6507P / CO10745

1 MHz?
28-pin plastic DIP

CO10745 is Atari part number for 6507

Picture of: Rockwell R6507P / CO10745

Synertek SY6504

1 MHz
28-pin plastic DIP

Picture of: Synertek SY6504

Synertek 6505

1 MHz
28-pin plastic DIP

Picture of: Synertek 6505

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At a glance

Type:
8-bit microprocessor
Introduction:
1975
Frequency (MHz):
1 - 4
Sockets:
CLCC68
DIP28
DIP40
PLCC44