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Fairchild F8

General

General Information

The F8 was Fairchild’s 1st processor. It was targeted as an inexpensive processor for service and control applications (gas pumps, vending machines, cash registers. It included 64 bytes of “scratchpad” RAM to enable two chip implementations (2nd chip being a ROM such as the 3851).

Production

1st Quarter 1975

Designers Unknown

Architecture

Type Data Word Address Space Clock Instruct- ions Assists Registers  GP Registers Math Registers Index IO Ports     Stack Interrupts Memory
NMOS,

CPU

 

8-bit 64K 2Mhz 71 BCD 64 1 2 2 x 8-bit  33 x 16 Vectored, 1 level 64 bytes RAM

Packages

Chip Name

Package

On-Chip Identification

Picture

Comments

F3850-1DC

White/Gold CerDIP, 40-pin

38501DC

F3850-1DC

F3850DC

Gray Ceramic, 40-pin

3850DC

F3850DC

F3850P

Black Resin, 40-pin

3850P

F3850P  

F3850PC

Black Resin, 40-pin

3850PC

F3850PC

 

Related Chips

Related Chips

Fairchild 3859, Mostek 3870

Second Sources

Mostek

Support Chips 3851(1K)/3856(2K)/3857(2K) (ROM/Program Storage Unit), 3852/3853 (Memory Interface), 3854 (DMA), 3861 (PIO), 3852 (DMI), 3853 (Static Memory Interface),