steve@clmqt.marquette.MI.US (Steve Lasich) (04/26/91)
gla@cbnewsj.cb.att.com (gregory.l.allen) writes: >My father has an AT&T 6300. He has disabled the indigenous video card and has >used other CGA video cards successfully. I recently acquired a true Blue >original IBM CGA card (full-card) because it is the only source of <<color>> >composite output >1) is there anything else that needs to be done to use an IBM CGA card in a > 6300 (do we need a bus corrector, etc.?) I believe the problem described is unrelated to the use of an AT&T 6300. This is a red-herring. Until last year our university computer lab contained 65 "True Blue" IBM PCs (PC and XT boxes) with "True Blue" IBM CGA full-length cards. Every video card in the lab exhibited the same behavior. The composite signal renders color as various monochromatic hatch-mark patterns. When colorburst is enabled this renders 80 column text totally unreadable. I haven't got any good advice about this problem but I can assure you that you are not alone and you are not having an AT&T compatibility problem. Steve Lasich Bang: ..!mailrus!sharkey!clmqt!steve Microcomputer Lab Coordinator Domain: steve@clmqt.marquette.mi.us Northern Michigan University Safest: acsl@nmumus.bitnet
drudman@hpcc01.HP.COM (Drew Rudman) (04/30/91)
As far as I know, the composite port on ANY CGA card supplies only a black and white signal (it samples off of the intensity signal of the CGA.) No CGA card I know of (and I used to sell all kinds - new and used) will provide you with a color composite signal. [ Call... 9600bps/60meg ][ Drew Rudman ] [ The Charge ][ ] [ Apple ][ IBM ][ Usenet: drudman@hpiosa.corp.hp.com ] [ (415) 321-4713 ][ The Charge BBS: Axe Slinger (#1) ]