IBM System/23 Datamaster: Difference between revisions

The video subsystem is almost copied verbatim from the Intel 8275 Datasheet. It consists in a 8275 variant plus a 8257 DMA device. The 4178629 made by Intel is the CRTC chip and it behaves slightlyexactly differentthe fromsame way as stock 8275s. whenCompatibility activatingwith thestock interrupts.8275 Thishas smallbeen differencetested makeswith thegood testresults, 05as failwell withas standardthe 8275sSoviet withoutKR580VG75, awhich patchis onalso ROS 02hcompatible. Otherwise,The theIntel Datamaster's8276 CRTCis hasnot thecompatible samewithout pinouta andROM acceptshack thethat samemodifies commandstest and05h parametersin thanorder to deactivate the regularlight componentspen test.