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Encyclopedia > Am2900

Am2900 is a family integrated circuits (ICs) created in 1975 by Advanced Micro Devices (AMD). They were constructed with bipolar devices, in a bit-slice topology, and were designed to be used as modular components each representing a different aspect of a computer control unit (CCU). By using a bit slicing technique, Am2900 family was able to implement a CCU with data, addresses, and instructions to be any multiple of 4-bits by multiplying the number of ICs. One major problem with this modular technique was it required a larger amount of ICs to implement what could be done on a single CPU IC. The Am2901 chip was the arithmetic-logical unit (ALU), and the "core" of the series. It could count using 4 bits and implement binary operations as well as various bit-shifting operations. Optical Microscope image of an integrated circuit showing defects in the aluminium layer deposition. ... 1975 (MCMLXXV) was a common year starting on Wednesday (the link is to a full 1975 calendar). ... For other possible meanings of AMD see AMD (disambiguation) Advanced Micro Devices, Inc. ... The schematic symbols for pnp- and npn-type BJTs. ... Bit slicing is a technique for constructing a processor from modules, bit slice processors, each of which processes one bit field or slice of an operand. ... ALU redirects here. ... In computer programming, a bitwise operation operates on one or two bit patterns or binary numerals at the level of their individual bits. ...


The most notable use of the Am2900 family is probably the PDP-11 of the Digital Equipment Corporation, which obtained 16 bit word width using four Am2901 ALUs in parallel. Dennis Ritchie and Ken Thompson at a PDP-11 The PDP-11 was a 16-bit minicomputer sold by Digital Equipment Corp. ... Digital Equipment Corporation was a pioneering company in the American computer industry. ... ALU redirects here. ...

Contents


Members of the Am2900-Family

for detail on the Am2900 Family See: The Am2900 Family Data Book, by AMD

ALU redirects here. ... ALU redirects here. ... In digital design, a multiplier or multiplication ALU is a hardware circuit dedicated to multiplying two binary values. ... In computing and telecommunication, a parity bit is a binary digit that takes on the value zero or one to satisfy a constraint on the overall parity of a binary number. ... In computing and telecommunication, a parity bit is a binary digit that takes on the value zero or one to satisfy a constraint on the overall parity of a binary number. ... In computing and telecommunication, a parity bit is a binary digit that takes on the value zero or one to satisfy a constraint on the overall parity of a binary number. ... In computer engineering, an interrupt is a signal from a device which typically results in a context switch: that is, the processor sets aside what its doing and does something else. ... In computer engineering, an interrupt is a signal from a device which typically results in a context switch: that is, the processor sets aside what its doing and does something else. ... In computing, an instruction register is the part of a CPUs control unit that stores an instruction. ... In computing, an instruction register is the part of a CPUs control unit that stores an instruction. ... In electronics and digital circuits, the flip-flop or bistable multivibrator is a pulsed digital circuit capable of serving as a one-bit memory. ... A decoder is a device which does the reverse of an encoder, undoing the encoding so that the original information can be retrieved. ... The term multiplexer has uses in several fields of application: // Electronics In electronics, a multiplexer or mux is a device that combines several electrical signals into a single signal. ... The term multiplexer has uses in several fields of application: // Electronics In electronics, a multiplexer or mux is a device that combines several electrical signals into a single signal. ... A decoder is a device which does the reverse of an encoder, undoing the encoding so that the original information can be retrieved. ... In synchronous digital electronics, such as most computers, a clock signal is a signal used to coordinate the actions of two or more circuits. ... Walter H. Schottky (July 23, 1886, Zürich, Switzerland - March 4, 1976, Pretzfeld, West Germany) was a German physicist who invented the screen-grid vacuum tube in 1915 and the tetrode in 1919 while working at Siemens. ... Walter H. Schottky (July 23, 1886, Zürich, Switzerland - March 4, 1976, Pretzfeld, West Germany) was a German physicist who invented the screen-grid vacuum tube in 1915 and the tetrode in 1919 while working at Siemens. ... Direct memory access (DMA) allows certain hardware subsystems within a computer to access system memory for reading and/or writing independently of the CPU. Many hardware systems use DMA including disk drive controllers, graphics cards, network cards, and sound cards. ... Counter - Wikipedia /**/ @import /skins/monobook/IE50Fixes. ... Direct memory access (DMA) allows certain hardware subsystems within a computer to access system memory for reading and/or writing independently of the CPU. Many hardware systems use DMA including disk drive controllers, graphics cards, network cards, and sound cards. ... A buffer amplifier is one that provides buffering between one circuit and another. ... A microprogram is a program consisting of microcode that controls the different parts of a computers central processing unit (CPU). ... In the field of computer architecture and engineering, a sequencer or microsequencer, is a part of a control unit of a CPU. It generates the addresses used to step through the microprogram of a control store. ... The schematic symbols for PNP- and NPN- type BJTs. ... Walter H. Schottky (July 23, 1886, Zürich, Switzerland - March 4, 1976, Pretzfeld, West Germany) was a German physicist who invented the screen-grid vacuum tube in 1915 and the tetrode in 1919 while working at Siemens. ... Random access memory (sometimes random-access memory), commonly known by its acronym RAM, is a type of computer storage (in practice only computer chips) whose contents can be accessed in any (i. ... Walter H. Schottky (July 23, 1886, Zürich, Switzerland - March 4, 1976, Pretzfeld, West Germany) was a German physicist who invented the screen-grid vacuum tube in 1915 and the tetrode in 1919 while working at Siemens. ... Random access memory (sometimes random-access memory), commonly known by its acronym RAM, is a type of computer storage (in practice only computer chips) whose contents can be accessed in any (i. ... Random access memory (sometimes random-access memory), commonly known by its acronym RAM, is a type of computer storage (in practice only computer chips) whose contents can be accessed in any (i. ... Walter H. Schottky (July 23, 1886, Zürich, Switzerland - March 4, 1976, Pretzfeld, West Germany) was a German physicist who invented the screen-grid vacuum tube in 1915 and the tetrode in 1919 while working at Siemens. ... Random access memory (sometimes random-access memory), commonly known by its acronym RAM, is a type of computer storage (in practice only computer chips) whose contents can be accessed in any (i. ... A programmable read-only memory (PROM) is a form of digital memory where the setting of each bit is locked by a fuse or antifuse. ... A programmable read-only memory (PROM) is a form of digital memory where the setting of each bit is locked by a fuse or antifuse. ... A programmable read-only memory (PROM) is a form of digital memory where the setting of each bit is locked by a fuse or antifuse. ... A programmable read-only memory (PROM) is a form of digital memory where the setting of each bit is locked by a fuse or antifuse. ...

See Also

This article gives is a list of AMD (Advanced Micro Devices) microprocessors (µPs), sorted by generation and release year. ...

External Links

Referances


  Results from FactBites:
 
Bit Slice Design - D.E. White - Preface (921 words)
This text has been compiled from the popular Customer Education Seminar, ED2900A, Introduction to the Am2900 Family, offered by AMD (Advanced Micro Devices) in the 1980s.
No attempt was made to duplicate all of the material presented in the customer seminar.
Chapter 1 is an introduction to the reasons why microprogramming should be selected as a means of implementing a control unit.
Am2900 - ToseekA Search Results (199 words)
AMD Am2900 is being developed and used for.
Am2900 · Am29000 · Am9080 · Am286 · Am386 · Am486 · Am5x86 · K5 · K6 · K6-2 · K6...
Am2900 ·Am29000 ·Am9080 ·Am286 ·Am386 ·Am486 ·Am5x86 ·K5 ·K6 ·K6-2 ·K6-III...
  More results at FactBites »

 
 

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