Good haul of old pc stuph

Tue Dec 20 23:48:29 CST 2005

>
> Ramdac? I The output of the CGA was plain RGBI digital, buffered 
> through an
> LS244.  There is a composite output, but it's sort of a simple-minded
> resistor adder network fet to the base of a 2n3904 to so some level
> shifting.

Do you have details on this resisternetwork ? i.e. is the  CGA 
schematic online somewhere ?
I need to add a composite output to a non-IBM CGA card and fit it 
inside a IBM5155

			Jos Dreesen