Thanks for your insights! Now I just have to wonder what was the purpose of a VLB graphics card that didn't support true color output.

The datasheet for the bt475kpj80 says its 3 8bit DACs for RGB, so I thought it should be able to handle 64k colors.

I was testing this Zeos NCR 77C22E+ VLB card and cannot figure out why it seems to only display a CGA color palette. Could it be a bad DAC? I performed a continuity check on every trace and found no issues. When I run VBETest from Display Doctor 6.53 it only lists the 8bit color modes. It does not …