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The Kenbak-1 has a total of nine registers. All are memory mapped. It has three general-purpose registers: A, B and X. Register A is the implicit destination of some operations.
The Centro de Investigaciones Digitales (CID, "Center for Digital Researches") was formed. The project was directed by Luis Carrasco and mostly designed by Orlando Ramos . The first version was designed using transistors , but after the introduction of integrated circuits , the design was changed.
Direct-coupler transistor logic (DCTL) circuit of the Leprechaun computer. The TRADIC (for TRAnsistor DIgital Computer or TRansistorized Airborne DIgital Computer) was the first transistorized computer in the USA, completed in 1954.
The architecture of the PDP-5 was specified by Alan Kotok and Gordon Bell; the principal logic designer was the young engineer Edson de Castro [8] [9] who went on later to found Data General. Hardware
The Z4 was arguably the world's first commercial digital computer, and is the oldest surviving programmable computer. [1]: 1028 It was designed, and manufactured by early computer scientist Konrad Zuse's company Zuse Apparatebau, for an order placed by Henschel & Son, in 1942; though only partially assembled in Berlin, then completed in Göttingen in the Third Reich in April 1945, [2] but not ...
The IBM 701 Electronic Data Processing Machine, known as the Defense Calculator while in development, was IBM’s first commercial scientific computer and its first series production mainframe computer, which was announced to the public on May 21, 1952. [1]
The Z3 was a German electromechanical computer designed by Konrad Zuse in 1938, and completed in 1941. It was the world's first working programmable, fully automatic digital computer. [3]
IBM 704 vacuum-tube circuit module. The IBM 704 had a 38-bit accumulator, a 36-bit multiplier/quotient register, and three 15-bit index registers.The contents of the index registers are subtracted from the base address, so the index registers are also called "decrement registers".