Am2900 is a family of 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).

Apr 18, 2020 · In this blog post, I open up an Am2901C chip, examine its die under a microscope, and explain the ECL circuits that made its arithmetic-logic unit work. You might wonder how multiple processor chips could work together to support arbitrary word lengths.

The Am2901 industry standard four-bit microprocessor slice is a high-speed cascadable ALU intended for use in CPUs, peripheral, controllers, and programmable microprocessor. The microinstruction flexibility of the Am2901 permits efficient emulation of almost any digital computing machine. AMtek SEMICONDUCTORS CO... List of Unclassifed Man...

Mar 10, 2025 · AMD 2901 bit-slice processor family includes 2901 and 2903 4-bit microprocessors slices, 2909 and 2911 microprogram sequencers, 2910 microprogram controller and other support chips. The 2901 processor consists of 16 4-bit registers, 4-bit ALU and associated decoding/multiplexing circuits.

The AMD Am29xxx series of chips are high performance processors and system building-block devices. The Am29000 family are 32-bit RISC microprocessors. The Am29000 was a Berkeley RISC, register window design similar to the Sun SPARC. The Am29100 family are microcontrollers and their support chips.

Jun 11, 2020 · In 1975 AMD introduced the Am2901 and Ken Shirriff takes a look inside. This chip was a type of processor called a bit-slice processor: each chip processed just 4 bits, but multiple chips were combined to produce a larger word size.

At the left is the control circuitry and on the right is the data manipulation circuitry. The block labeled "2901 array" consists of the ALU, scratchpad registers, and data steering logic (all internal to the Am2901's), plus left/right shift control and carry lookahead circuit.

Feb 17, 2011 · As the years went by, AMD added more second-sources, and dropped a few. Eventually coming to completely dominate the bit-slice market. The Soviets began to copy the 2901 around 1985 (not particularly legally but they did what they had to) and continued to do so until well into the 90’s.

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AMD is well known for its 2901 bit-slice processor of the 1970’s (being made well into the 1990’s), as well as the previously detailed AM29116 16-bit processor released in 1981. However, the 1980’s brought another AMD design as well, though not as complicated, it is no less interesting.