Intel 4040

The Intel 4040 was the successor to the Intel 4004. It was introduced in 1974.

New features

• Interrupt
• Single Step

Extensions

• Instruction Set expanded to 60 instructions
• Program memory expanded to 8K bytes
• Registers expanded to 24
• Subroutine stack expanded to 7 levels deep

New support chips

• 4201 - Clock Generator 500 to 740 kHz using 4 to 5.185 MHz crystals
• 4308 - 1K byte 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 - 2K byte ROM
• 4101 - 256 4-bit word RAM
• 4002 - 320 bit (80 x 4) RAM and 4 discrete Outputs

See also: Intel 4040, 1974, Celeron, Intel 4004, Intel 8008, Intel 80186, Intel 80188, Intel 80286, Intel 80386