Intel 4040

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Intel 4040 Central processing unit
An Intel D4040 Microprocessor
Produced:	1974
Manufacturer:	Intel
Instruction Set:	pre x86
Socket:	24 pin DIP

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

The 4040 was used primarily in games, test, development, and control equipment. The package of the 4040 is more than twice as wide as the 4004 and has 24 pins vs. the 16 of the 4004. The 4040 added 14 instructions, larger stack (8 level), 8 kiB program space, 8 more registers, and interrupt abilities (including shadows of the first 8 registers).

The 4040 family is also referred to as the MCS-40.

Contents 1 New features 2 Extensions 3 Designers 4 New support chips 5 MCS-40 Family Data Sheets 6 External links

[edit] New features

• Interrupt
• Single Step

[edit] Extensions

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

[edit] Designers

Ted Hoff, Federico Faggin, Stan Mazor, Masatoshi Shima

[edit] New support chips

• 4201 - Clock Generator 500 to 740 kHz using 4 to 5.185 MHz crystals
• 4308 - 1 kiB 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 - 2 kiB ROM
• 4101 - 256 4-bit word RAM

[edit] MCS-40 Family Data Sheets

4001-2048-bit (256 x 8) ROM w/4-bit I/O Port

4201-4MHz Clock Generator

4207/4209/4211-General Purpose Byte Input Port

4265-Programmable General Purpose I/O Device

4269-Programmable Keyboard Display Device

4289-Standard Memory Interface for MCS-4/40

4308-8192-bit (1024 x 8) ROM w 4-bit IO Ports

4316-16384-bit (2048 x 8) Static ROM

4702-2048-bit (256 x 8) EPROM

4801-5.185 MHz Clock Generator Crystal for 4004_4201A or 4040/4201A CPU Set

[edit] External links

• Several collectable Intel chips including a white and gold C4004

List of Intel microprocessors | List of Intel CPU slots and sockets

Intel processors 4004 | 4040 | 8008 | 8080 | 8085 | 8086 | 8088 | iAPX 432 | 80186 | 80188 | 80286 | 80386 | 80486 | i860 | i960 | Pentium | Pentium Pro | Pentium II | Celeron | Pentium III | XScale | Pentium 4 | Pentium M | Pentium D | Pentium Extreme Edition | Xeon | Core | Core 2 | Itanium | Itanium 2   (italics indicate non-x86 processors)