Word:

Intel 4004

(processor)Intel 4004 - 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.
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Integrated Systems Architecture
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-- Intel 4004 --
Intel 4040
Intel 486
Intel 486DX
Intel 486SX
Intel 487SX
Intel 8008
Intel 80186
Intel 80188
Intel 80286
Intel 80386
Intel 80386DX
Intel 80386SX
Intel 8048
Intel 80486
Intel 8051
Intel 8080
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