Intel 8008

The Intel 8008 (initially as 1201) was introduced on 1 April 1972, was the first 8 -bit processor and the first von Neumann computers from Intel. He was housed in a 18 pin DIL package and consisted of 3500 transistors. Is a widely held view, which would be an extended 8- bit 4004 or an evolution of the 4040 8008. However Both CPUs are fundamentally different from the 8008th The 8008 is considered to be the direct precursor of the Intel 8080 and is the basis of the x86 processor architecture and the associated instruction sets from Intel.

General

Modest dissemination was the 8008 inter alia, by its use in terminals, analyzers and desktop computers, such as the Mark -8 or the Micral. A resounding success, however, was not granted him. Due to its very " compact " bus interface required the connection of storage and Ein-/Ausgabe-Bausteinen considerable decoding effort. Its instruction set was very inflexible and its ability to interrupt processing rudimentary way because there was no way, its internal state completely secure, as actually is essential in a meaningful interrupt handling. Besides, he still had a CPU internal return stack, which was not directly accessible by the instruction set. Instruction set and microarchitecture were revised during 8080 followers and more flexible. Nonetheless, has virtually every 8008 - command its equivalent in the 8080 instruction set, so that the may 8008 are, ultimately, as early forerunner of 8086, which, inter alia, also with regard to easy portability of 8080 - was developed and 8085 software.

Specifications

  • Clock frequency: 500 kHz ( 8008-1: 800 kHz)
  • Computing power: 0.05 MIPS
  • Technique: 10 microns, PMOS
  • Number of transistors: 3,500
  • Addressable Memory: 16 KiB
  • Posted in terminals, desktop computers, packaging machines, analyzers, and more.
  • Originally developed for the terminal Datapoint 2200
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