On Thu, 28 Aug 2014, Julian Wolfe wrote:
The ATI EGA Wonder is very small, and has a 4-pin
connector for displaying
16-shade dither on the Compaq Portable and IBM 5155. TULARC had switch
settings for that variant, and a diagram. I believe there are also
variants of the EGA Wonder that do not have the 4-pin connector.
I have one of these in my 5155, so I can guarantee it works. Somewhere
online there are screenshots of Commander Keen 1 being played on it at a
VCF Midwest.
Besides using the 4 pin Berg ("composite" connector), . . .
When I first realized that the Compaq internal monitor was EGA capable,
I bought an ATI EGA Wonder, AND the additional daughterboard that gave
full EGA output to a connector identical to the Compaq internal connector
(and said daughterboard was sold explicitly for that purpose).
The 5155, OTOH, is not EGA. It is "composite" (kinda RS170). It connects
to the internal "composite" 4 pin Berg connector.