Toshiba L517 Personal Computer User Manual


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3.8Video 3DiagnosticPrograms
45
3.8 Video
Thistestitemteststhevideoby:
1. displayingthefiguresindifferentgraphicmodes.
2. displayingthepropertyandcolorofthecharactersindifferenttextmodes.
Userwillconfirmwhethereachvideomodeworksnormallybyjudgingwhetherthedisplay
iscorrect.Itcheckswhetherthevideomemoryworksnormallybywritingdataintothevideo
memory,thenreadingitoutandcomparingthetwovalue.
Subtest01 TextMode
1. CharacterTest
Teststwotypesoffontpatterns.
Font9*14
Font9*16
Itrequirestheusertocheckwhetherallcharactersofeachfonttypedisplayed
correctlybyansweringthequestionspromptedonscreen.Itwillbedisplayedas
follows:.
2. TextAttribute
Thistestitemistocheckwhetherthetextattributeofnormal,hi-intensity,
inverse,andblinkinginVGAtextmodecouldbecorrectlydisplayedonthe
screen.
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