Computing Dictionary
Intel 4004 definition
processor The world's first
microprocessor, released in 1971. The 4004 contained 2300 transistors (compared with 5.5 million in the 1996
Pentium Pro) and was intended for use in a calculator. It processed data in 4 bits, but its instructions were 8 bits long. Program and Data memory were separate, it had 1
kilobyte of data memory and a 12-bit
PC for 4K of program memory (in the form of a 4 level
stack, used for CALL and RET instructions). There were also sixteen 4-bit (or eight 8-bit) general purpose
registers. The 4004 had 46 instructions.
(1997-03-30)
