intel 4004

1 definition found

intel 4004 - Free On-line Dictionary of Computing (26 May 2007) :

  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)