CMDMicro > CMDMicroG65SC02P-2
Modified: May 15, 2005, 8:26 pm
Manufacturer:CMD Micro
Data Code:8948
Process:1 Micron
Architecture:8 bit MCU
Used in:Computers, Apple 1, Apple II
Description: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 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).

CMDu was one of the lesser known second sources.