1979 HP Collectors Dream 2649A model computer
pat at computer-refuge.org
Wed Aug 17 18:41:48 CDT 2005
Tony Duell declared on Wednesday 17 August 2005 05:29 pm:
> > On Wed, 17 Aug 2005, Tony Duell wrote:
> > > I'd love to konw how they get colour and grapghics out of an MDA
> > > card in an original 5150 PC. You did say 'any PC' after all :-)
> > Ehm, well, if I had been correct, I wouldn't have said 'PC', since a
> > LGP-30 is a 'PC', too, by the terms of its time ;-))
> > But IBM PC does not say anything about a specific graphics card.
> You said 'any PC'. OK, I will read 'PC' to mean 'IBM PC compatible
> computer'. thus rulling out things like LGP-30s, PDP8s, etc. You did
> not, however, specify a video card. I therefore assumed that any
> PC-compatible video card would work, and the original IBM MDA card is
> one such.
> In other words, a 5150 with an MDA card is a member of the set of 'any
You can get "graphics" out of an MDA if you try hard enough. Lo-res, of
course (line drawing chars and 1/4, 1/2, 3/4, full shaded boxes in the
128-255 part of the character set).
Also, an authentic MDA display has green pixels IIRC, so there's your
colour. Or did you mean multi-colour? :)
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