Intel 4004
<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)
Nearby terms:
integration « integration testing « integrity
constraint «
Intel 4004 » Intel 4040 » Intel 486 » Intel
486DX
|