Binary-coded decimal: Difference between revisions

Revision as of 01:56, 27 April 2024

Revision as of 13:58, 8 May 2024

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The [[BIOS]] in many [[personal computer]]s stores the date and time in BCD because the [[MC6818]] real-time clock chip used in the original [[IBM PC AT]] motherboard provided the time encoded in BCD. This form is easily converted into ASCII for display.<ref name="Units_ENS"/><ref name="MC6818"/>

The [[Atari 8-bit familycomputers]] ofuse computers useda BCD toformat implementfor floating- point algorithmsnumbers. The [[MOS Technology 6502|MOS 6502]] processor has a BCD mode that affectsfor the addition and subtraction instructions. The [[Psion Organiser|Psion Organiser 1]] handheld computer's manufacturer-supplied software also entirely useduses BCD to implement floating point; later Psion models useduse binary exclusively.

Early models of the [[PlayStation 3]] store the date and time in BCD. This led to a worldwide outage of the console on 1 March 2010. The last two digits of the year stored as BCD [[time formatting and storage bugs|were misinterpreted]] as 16 causing an error in the unit's date, rendering most functions inoperable. This has been referred to as the [[Year 2010 problem]].