Arithmetic logic unit - Revision history

Jnc: +See also

2021-08-07T15:54:35Z

+See also

Jnc: typo

2018-12-13T02:44:49Z

typo

Jnc: +cat

2018-12-13T02:44:21Z

+cat

Jnc: Avoid redir

2018-03-15T08:30:17Z

Avoid redir

Jnc: avoid redir

2017-07-30T02:51:25Z

avoid redir

Jnc: Jnc moved page ALU to Arithmetic logic unit: Bah, created it at the short name

2017-07-29T15:42:59Z

Jnc moved page ALU to Arithmetic logic unit: Bah, created it at the short name

Jnc: A decent start

2017-07-29T15:42:21Z

A decent start

New page

An '''arithmetic logic unit''' (usually referred to as an '''ALU''') is the part of a [[Central Processing Unit|CPU]] in which calculations (both numerical and logical, hence the name) are carried out.

Typical operations performed by an ALU are addition, logical AND, etc. In early machines, the ALUs could not perform a full range of mathematical operations; multiplication (and division), for example, was often not provided - or performed in another, often-optional, unit. [[Floating point]] was also typically supported by a separate unit.

A relatively early 74-series [[MSI]] [[TTL]] [[integrated circuit|chip]], the 74181, provided a 4-bit ALU, with a full complement of 16 different arithmetical and logical operations on the two operands. Although popular once it was introduced, earlier low-end machines (e.g. the [[PDP-11/20]]) often had less capable ALUs, in order to keep the chip count, and thus the cost, down.

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 A relatively early [[74 series]] [[MSI]] [[transistor-transistor logic|TTL]] [[integrated circuit|chip]], the 74181, provided a 4-bit ALU, with a full complement of 16 different arithmetical and logical operations on the two operands. Although popular once it was introduced, earlier low-end machines (e.g. the [[PDP-11/20]]) often had less capable ALUs, in order to keep the chip count, and thus the cost, down.
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 [[Category: Hardware Basics]]

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 A relatively early [[74 series]] [[MSI]] [[transistor-transistor logic|TTL]] [[integrated circuit|chip]], the 74181, provided a 4-bit ALU, with a full complement of 16 different arithmetical and logical operations on the two operands. Although popular once it was introduced, earlier low-end machines (e.g. the [[PDP-11/20]]) often had less capable ALUs, in order to keep the chip count, and thus the cost, down.
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 [[Category: Hardware Basics]]

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	A relatively early [[74 series]] [[MSI]] [[transistor-transistor logic\|TTL]] [[integrated circuit\|chip]], the 74181, provided a 4-bit ALU, with a full complement of 16 different arithmetical and logical operations on the two operands. Although popular once it was introduced, earlier low-end machines (e.g. the [[PDP-11/20]]) often had less capable ALUs, in order to keep the chip count, and thus the cost, down.		A relatively early [[74 series]] [[MSI]] [[transistor-transistor logic\|TTL]] [[integrated circuit\|chip]], the 74181, provided a 4-bit ALU, with a full complement of 16 different arithmetical and logical operations on the two operands. Although popular once it was introduced, earlier low-end machines (e.g. the [[PDP-11/20]]) often had less capable ALUs, in order to keep the chip count, and thus the cost, down.
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← Older revision		Revision as of 08:30, 15 March 2018
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	Typical operations performed by an ALU are addition, logical AND, etc. In early machines, the ALUs could not perform a full range of mathematical operations; multiplication (and division), for example, was often not provided - or performed in another, often-optional, unit. [[Floating point]] was also typically supported by a separate unit.		Typical operations performed by an ALU are addition, logical AND, etc. In early machines, the ALUs could not perform a full range of mathematical operations; multiplication (and division), for example, was often not provided - or performed in another, often-optional, unit. [[Floating point]] was also typically supported by a separate unit.

−	A relatively early 74-series [[MSI]] [[~~Transistor–transistor~~ logic\|TTL]] [[integrated circuit\|chip]], the 74181, provided a 4-bit ALU, with a full complement of 16 different arithmetical and logical operations on the two operands. Although popular once it was introduced, earlier low-end machines (e.g. the [[PDP-11/20]]) often had less capable ALUs, in order to keep the chip count, and thus the cost, down.	+	A relatively early [[74 series]] [[MSI]] [[transistor-transistor logic\|TTL]] [[integrated circuit\|chip]], the 74181, provided a 4-bit ALU, with a full complement of 16 different arithmetical and logical operations on the two operands. Although popular once it was introduced, earlier low-end machines (e.g. the [[PDP-11/20]]) often had less capable ALUs, in order to keep the chip count, and thus the cost, down.

← Older revision		Revision as of 02:51, 30 July 2017
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	Typical operations performed by an ALU are addition, logical AND, etc. In early machines, the ALUs could not perform a full range of mathematical operations; multiplication (and division), for example, was often not provided - or performed in another, often-optional, unit. [[Floating point]] was also typically supported by a separate unit.		Typical operations performed by an ALU are addition, logical AND, etc. In early machines, the ALUs could not perform a full range of mathematical operations; multiplication (and division), for example, was often not provided - or performed in another, often-optional, unit. [[Floating point]] was also typically supported by a separate unit.

−	A relatively early 74-series [[MSI]] [[TTL]] [[integrated circuit\|chip]], the 74181, provided a 4-bit ALU, with a full complement of 16 different arithmetical and logical operations on the two operands. Although popular once it was introduced, earlier low-end machines (e.g. the [[PDP-11/20]]) often had less capable ALUs, in order to keep the chip count, and thus the cost, down.	+	A relatively early 74-series [[MSI]] [[Transistor–transistor logic\|TTL]] [[integrated circuit\|chip]], the 74181, provided a 4-bit ALU, with a full complement of 16 different arithmetical and logical operations on the two operands. Although popular once it was introduced, earlier low-end machines (e.g. the [[PDP-11/20]]) often had less capable ALUs, in order to keep the chip count, and thus the cost, down.

← Older revision	Revision as of 15:42, 29 July 2017
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