22 Dec
2005
22 Dec
'05
2:03 a.m.
On Thu, 22 Dec 2005, Tony Duell wrote:
I had a Plantronics CGA double card that claimed to be able to do 640 x
400 as an added mode.
It did not have an RCA jack, but it did have the 4 pin berg, one pin of
which is composite.
Does the "Portable PC" connect its video to the RCA jack, or to the 4 pn
berg?
(Compaq's CGA and EGA have a 2 x 5 or 2 x 6 dual row set of pins near the
center of the board that they use to drive the EGA capable monitor that is
built in)
Original IBM
CGA has ONE RCA jack (for composite video), NOT TWO.
EGA often has two, and there are some aftermarket CGA boards that have a
color composite and a B&W composite jack.
Clone CGA cards with no RCA sockets
sometimes put the composite signal on
pin 7 of the DE9 connector (this is a no-connect on the iBM card). Worth
checking there anyway.