CMDMicro > CMDMicroG65SC816P-4

Modified: May 15, 2005, 8:30 pm

Manufacturer:	CMD Micro
Model:	G65SC816P-4
Speed:	4 MHz
Type:	65816
Data Code:	9213
Introduced:	1988
Transistors:	??
Package:	40PDIP
Process:	1 Micron
Architecture:	16 bit MCU w/ 8bit 6502 Emulation
Used in:	Super NES, Apple IIGS
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. ------------------------- The 65816 was a 16 bit extension of the 6502.