7 Jun
2010
7 Jun
'10
8:35 p.m.
On Mon, 7 Jun 2010, Mr Ian Primus wrote:
The number of lines of resolution isn't as
important as the sync rates.
EGA and CGA use different sync rates, and thus are not compatible.
Similarly, PC style monochrome also runs at a different frequency. You
need to figure out what "mode" the machine uses, so you can pick a
replacement monitor accordingly. Also, wouldn't the monochrome version
of the machine have different video electronics? I know nothing about
this computer, but you'd probably need to find the color graphic board
in order to drive a color monitor. But... I don't know. The Compaq
portable used a built-in monochrome monitor at CGA sync rates, but could
drive an external color monitor.
Actually, the Compaq "portable" (the luggable, not any NEWFANGLED) could
do both CGA AND EGA rates! Compaq made an EGA card for it (a little
rare) that included the midboard connector for the internal monitor!.
Another company (ATI?) made an add-on board (more than a little rare) for
one of their EGAs for use in Compaq luggables.
Connecting the incorrect monitor shouldn't
immediately destroy it. At
least, I don't think so. I'm sure it is definitely *possible* to damage
a monitor like this though - I've just never seen it done. Be prepared
IBM monochrome monitor to CGA "But the connector fits!"