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- Bug_compatibility abstract "Computer hardware or software is said to be bug compatible if it exactly replicates even an undesirable feature of a previous version. The phrase is found in the Jargon File.An aspect of maintaining backward compatibility with an older system is that such systems' client programs often do not only depend on their specified interfaces, but also on bugs and unintended behaviour. This must also be preserved by the newer replacement. Besides the significantly higher complexity that needs to be maintained during the natural evolution of the code or interface, this can sometimes cause performance or security issues, and the inconsistencies in the behaviour of interfaces can sometimes lead to new bugs in the software using it, creating difficult to resolve multi-directional cross dependencies between various pieces of code.Examples of this can be found in MS-DOS / PC DOS, where the executable loader contains code specially designed to detect and fix a number of widespread bugs in applications and runtime libraries by patching the loaded image before executing it. Over the course of development, DR-DOS also had to be modified to not only emulate many undocumented peculiarities of MS-DOS / PC DOS, but also actual bugs in the kernel and several drivers in order to make certain other drivers and applications run on DR-DOS, when they were tested on specific versions of MS-DOS only.Windows, which has traditionally emulated many old system bugs in order to allow older low-level programs to run, is another example. As a result, Wine, which makes it possible to run many Windows applications on other platforms, also needs to maintain bug compatibility with Windows.During development of its PC compatible, Compaq engineers found that Microsoft Flight Simulator would not run because of what subLOGIC's Bruce Artwick described as \"a bug in one of Intel's chips\", forcing them to make their computer bug compatible with the IBM PC. Another hardware example is found in the design of the IBM AT A20 address line to emulate the behaviour in older processors.".
- Bug_compatibility wikiPageID "8238278".
- Bug_compatibility wikiPageLength "3373".
- Bug_compatibility wikiPageOutDegree "19".
- Bug_compatibility wikiPageRevisionID "707910247".
- Bug_compatibility wikiPageWikiLink A20_line.
- Bug_compatibility wikiPageWikiLink Backward_compatibility.
- Bug_compatibility wikiPageWikiLink Bruce_Artwick.
- Bug_compatibility wikiPageWikiLink Category:Software_bugs.
- Bug_compatibility wikiPageWikiLink Compaq.
- Bug_compatibility wikiPageWikiLink DR-DOS.
- Bug_compatibility wikiPageWikiLink IBM_PC_DOS.
- Bug_compatibility wikiPageWikiLink IBM_PC_compatible.
- Bug_compatibility wikiPageWikiLink AT.
- Bug_compatibility wikiPageWikiLink Jargon_File.
- Bug_compatibility wikiPageWikiLink MS-DOS.
- Bug_compatibility wikiPageWikiLink Microsoft_Flight_Simulator.
- Bug_compatibility wikiPageWikiLink Microsoft_Windows.
- Bug_compatibility wikiPageWikiLink Software_bug.
- Bug_compatibility wikiPageWikiLink SubLOGIC.
- Bug_compatibility wikiPageWikiLink Wine_(software).
- Bug_compatibility wikiPageWikiLinkText "Bug compatibility".
- Bug_compatibility wikiPageWikiLinkText "bug compatibility".
- Bug_compatibility wikiPageWikiLinkText "bug compatible".
- Bug_compatibility wikiPageWikiLinkText "bug-compatible".
- Bug_compatibility wikiPageUsesTemplate Template:Operating-system-stub.
- Bug_compatibility wikiPageUsesTemplate Template:Portal.
- Bug_compatibility wikiPageUsesTemplate Template:Refimprove.
- Bug_compatibility wikiPageUsesTemplate Template:Reflist.
- Bug_compatibility subject Category:Software_bugs.
- Bug_compatibility type Anomaly.
- Bug_compatibility comment "Computer hardware or software is said to be bug compatible if it exactly replicates even an undesirable feature of a previous version. The phrase is found in the Jargon File.An aspect of maintaining backward compatibility with an older system is that such systems' client programs often do not only depend on their specified interfaces, but also on bugs and unintended behaviour. This must also be preserved by the newer replacement.".
- Bug_compatibility label "Bug compatibility".
- Bug_compatibility sameAs Q4986085.
- Bug_compatibility sameAs m.026xbtb.
- Bug_compatibility sameAs Q4986085.
- Bug_compatibility wasDerivedFrom Bug_compatibility?oldid=707910247.
- Bug_compatibility isPrimaryTopicOf Bug_compatibility.