Monday 26 March 2012

Programming model

The Intel 8080 was the almsman to the 8008. It acclimated the aforementioned basal apprenticeship set as the 8008 (developed by Computer Terminal Corporation) and was antecedent cipher accordant with its predecessor, but added some accessible 16-bit operations to the apprenticeship set as well. The 8080's ample 40-pin DIP packaging acceptable it to accommodate a 16-bit abode bus and an 8-bit abstracts bus, acceptance simple admission to 64 kilobytes of memory

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Registers

The processor had seven 8-bit registers, (A, B, C, D, E, H, and L) area A was the 8-bit accumulator and the added six could be acclimated as either byte-registers or as three 16-bit annals pairs (BC, DE, HL) depending on the accurate instruction. Some instructions aswell enabled HL to be acclimated as (a limited) 16-bit accumulator, and a pseudoregister, M, could be acclimated about anywhere that any added annals could be acclimated and referred to the anamnesis abode acicular to by HL. It aswell had a 16-bit assemblage arrow to anamnesis (replacing the 8008's centralized stack), and a 16-bit affairs counter.

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