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Print/export Download as PDF; ... The 74181 is a 4-bit slice arithmetic logic unit ... Manufacturer's data sheets: Texas Instruments ...
In the 1970s and 1980s, a number of research and commercial computers used bit slicing, in which the CPU's arithmetic logic unit (ALU) was built from multiple 4-bit-wide sections, each section including a chip such as an Am2901 or 74181. The Zilog Z80, although it is an 8-bit microprocessor, has a 4-bit ALU. [11] [12]
4-bit arithmetic logic unit/function generator, generate and propagate outputs 20 SN74LS381A: 74x382 1 4-bit arithmetic logic unit/function generator, ripple carry and overflow outputs 20 SN74LS382: 74x383 1 8-bit register open-collector 20 SN74S383: 74x384 1 8-bit by 1-bit two's complement multipliers 16 SN74LS384: 74x385 4 quad serial adder ...
Some models of the DEC PDP-series 'minis' used the 74181 ALU as the main computing element in the CPU. Other examples were the Data General Nova series and Hewlett-Packard 21MX, 1000, and 3000 series. In 1965, typical quantity-one pricing for the SN5400 (military grade, in ceramic welded flat-pack) was around 22 USD. [19]
In computing, an arithmetic logic unit (ALU) is a combinational digital circuit that performs arithmetic and bitwise operations on integer binary numbers. [ 1 ] [ 2 ] This is in contrast to a floating-point unit (FPU), which operates on floating point numbers.
TTL-based, with the ALU built around four 74181 MSI chips. It has user programmable microcode, uses big-endian format and a CPU clock of 5.88 MHz. [4] [3] Memory: 96 [5] – 512 KB (128 KB for $4000) [3] Display: 606 × 808 pixels [3] Input: Keyboard, 3-button mouse, 5-key chorded keyboard: Connectivity: Ethernet: Successor: Xerox Star: Related ...
Download as PDF; Printable version; ... "The 74181 is a bit slice arithmetic logic unit ... the signal "L" from figure 1 of the data sheet translates to logical one ...
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