31 Jan
2008
31 Jan
'08
3:04 p.m.
On Thu, 31 Jan 2008, Chuck Guzis wrote:
IIRC, while the MDA card had a light pen connector, it was never really
documented or supported by IBM, due to the fact that light pens didn't
work properly with the very long persisnence phosphor of the 5151
monitor. The CGA card's light pen connector was docuemtned, though
(although I have never seen a light pen designed to work with it
-tony
Personally, I'm surprised the light pen
interface wasn't used for
more things.
I think that the light pen was killed by having such a long persistence
phosphor.