meaning of intel 4004

1. Intel 4004 The worlds 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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