20 Apr
2012
20 Apr
'12
11:06 a.m.
I was merely suggesting that, for a sufficient
incentive, that you might
even give up the original, in exchange for a copy of adequate quality to
have all the information content, plus suitable [large] compensation,
It's possible... I think one thing I would insist upon (and which might
well be impossible in most cases) would be a letter fro mthe copyright
holder (e.g. IBM) authorising this copy. In other words, the docuemtn I
end up with is as legal as the one I hand over.
The IBM EGA board has a DE9 socket on the bracket
for the monitor, with a
jumper link on the board to select the funcito nfo pin 2 (either
grounded, for CGA and MDA monitors or the low bit of the red signal for
EGA monitors). There are also 2 RCA phono sockets, but they're just wired
to 2 pins of the expansion conenctor. I guess you could desig a composite
video encoder to fit there.
When I fist saw the board, I was seriously disappointed that neither of
those was wired to provide a composite (RS170?) signal. Oh, there's an SIL header (I think 6 pins,
one cut off) for a lightpen on the board too.
But, probably due to the long persistance phosphor of the original IBM
"Monochrome" monitor, IBM never provided a light pen for any of their
[PC video] cards that supported one.
From what I rememebr reading the the O&A Techref,m
the MDA card did not
claim to support a lightpen, even though the is the connector
for it. I
guess this is becuase of the persistance of the 5151 monitor.
The CGA board does claim to support a lightpen, I don't think that IBM
ever suppleid one for it though. I am not sure what you were supposed to
use with it.
-tony