+------------------------------------------+ + EGA monitor and Quorum, or how it's done.+ +------------------------------------------+ How almost everyone knows exists three in principle different schemes of these same Quorums: BK-04, Quorum 64 and the most poor option Quorum 128 (128+ is the same). Also it is known that an EGA TV requires RGB signals, signal brightness and vertical with horizontal synchronization,and in TTL levels, that's where find them on the board, now and let's find out... For computers based on BK-04: RGB and brightness are taken from the second pins D53, D60, D59 and D54 respectively, on the board they are located next to the TV modulator (such a little iron box in left corner), these are 4 pieces 555UP23 (or 1533UP23) in a row, they go in this order: D60, D53, D59, D54. Now the sync signals vertical on scheme designated as VBL, 13 leg D17; horizontal - HBL, 9 leg D12, but they can also be taken from 2 and 5 legs D58 respectively (LAZ in the bottom row). system connector printer joysticks +--+-+-+-+----+------------+-------+-------+--------------+-+-+ + +-+-+-+ +------------+ +-------+ +-+-+ + +------+ + + + TV + + + + mode-+ + + + лят- + + + + ор + + + + + + + +------+ ##### D60 + + ##### D53 + + ##### + + ##### D59 + + ##### D54 + + ##### + + #### + + #### #### #### #### D58 + + #### #### + +--------------------------------------------------------------+ Теперь о pacnuhobke разьема для монитора, он 9-ти контактный: 1 - GND, 2 - red, 3 - RED, 4 - GREEN, 5 - BLUE, 6 -green/intensity (brightness), 7 - blue, 8 - N synh (horizontal cuhxpa), 9 - V synh (vertical cuhxpa). Well so here, to the first contact is ground (even a bucket), to 3, 4, 5 - RGB, to 6 - brightness, and to 8 and 9 - synchro. I completely forgot, there black color high brightness gray It looks like it sucks, so maxohbka a diagram to prevent this from happening: R +---+ ---------+ 1 + +---+ +---+ G + о-------+ о---+ 1 + ---------+ + +---+ + о---+ В +---+ +---------+ + + +---+ -------------------+ +---+ +-+ 1 + BRIGHT` BRIGHT (яркость) +---+ + о--------- -----------------------------+ о-----+ + +---+ +---+ Смысл такой, когда черный цвет (R, G и В в 0) яркость в 0, a на монитор нужно подавать BRIGHT` вместо BRIGHT. У меня на БК-04 это все собрано, и прекрасно работает.
Hardware - EGA monitor and Quorum, or how it's done.
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