14 Aug
2016
14 Aug
'16
8:04 p.m.
On Sun, 14 Aug 2016, Adrian Stoness wrote:
should work fine u got rca and vga on that card might
not be colour but it
should work
??
What card is that?
The IBM 5150 was the PC.
The IBM 5151 was the IBm green screen "Monochrome" monitor. The card for
that ("Monichrome Display and Printer Card"), and the various clone MDA
cards, did NOT have RCA, and were NOT at composite video rates.
(18.43?KHz horizontal, 50Hz? vertical)
It had a DE9 for the monichrome monitor and a DB25 for printer ("Cenronics
compatible parallel")
Hercules' video card was an imitation of the MDP, with more RAM, and
monochrome 720x350 graphics.
On the other hand, the CGA card did have RCA composite video (close to
RS170), and "RGB" (DE9). About 15.75KHz?
It was NOT at the correct frequency for the 5151 monitor!
IBM did not even have sufficient protection in their circuits if you
plugged a monitor into the wrong card, or set the video card to
incompatible frequencies!
The IBM EGA card had TWO RCA jacks, but neither were composite output.
What is RCA and VGA??