Picked up a Computerland BC88 with a Paradise Mono / Color card in it.

When it arrived it was set for Monochrome, I read the manual and changed the jumpers to CGA. Supposedly it can do 4 color CGA at 640x350.

The only RGB monitor I have at present is an IBM 5154. I assumed this would work... we used it with our CGA hobbled AT when I was a kid.. but it won't sync to it.. just get a black screen while the machine goes about its business.

Am I forgetting/missing something?