24-bit computing: Difference between revisions

Revision as of 06:34, 2 September 2015

Revision as of 06:54, 2 September 2015

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The IBM [[System/360]], announced in 1964, was a popular computer system with 24-bit addressing and [[32-bit]] general registers and arithmetic. The early 1980s saw the first popular personal computers, including the IBM [[PC/AT]] with an Intel [[80286]] processor using 24-bit addressing and [[16-bit]] general registers and arithmetic, and the [[Apple Inc.|Apple]] [[Macintosh 128K]] with a Motorola [[68000]] processor featuring 24-bit addressing and 32-bit registers.

The [[eZ80]] is a microprocessor and microcontroller family, with 24-bit registers and therefore 24-bit linear addressing, that is [[binary compatible]] with the [[8-bit|8]]/16-bit [[Z80]]. {{cn|date=September 2015}}

The [[65816]] is a microprocessor and microcontroller family with 16-bit registers and 24-bit [[bank switching|bank switched]] addressing. It is binary compatible with the [[8-bit]] [[6502]].<ref>

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The range of unsigned integers that can be represented in 24&nbsp;bits is 0 to 16,777,215 (0xFFFFFF in [[hexadecimal]]). The range of signed integers that can be represented in 24&nbsp;bits is -8,388,608 to 8,388,607. {{cn|date=September 2015}}

Several fixed-point [[digital signal processor]]s have a 24-bit data bus, selected as the basic word length because it gave the system a reasonable precision for the processing audio (sound).