INTEL 4040

The 'Intel 4040' microprocessor was the successor to the Intel 4004. It was introduced in 1974. The 4040 employed a 10μm silicon-gate PMOS technology and could execute approximately 60,000 instructions per second.

Contents

New features

Extensions

Designers

New support chips

External links

New features

★ Interrupt

★ Single Step

Extensions

★ Instruction Set expanded to 60 instructions

★ Program memory expanded to 8 KiB

★ Registers expanded to 24

★ Subroutine stack expanded to 7 levels deep

Designers

Federico Faggin proposed the project, formulated the architecture and led the design.
The detailed design was done by Tom Innes.

New support chips

★ 4201 - Clock Generator 500 to 740 kHz using 4 to 5.185 MHz crystals

★ 4308 - 1 KiB ROM

★ 4207 - General Purpose byte Output port

★ 4209 - General Purpose byte Input port

★ 4211 - General Purpose byte I/O port

★ 4289 - Standard Memory Interface (replaces 4008/4009)

★ 4702 - 256 byte UVEPROM

★ 4316 - 2 KiB ROM

★ 4101 - 256 4-bit word RAM

External links

★ Several collectable Intel chips including a white and gold C4004