StephensDev
At the end of 2024 I purchased an HDMI graphic gremlin to get a more modern hdmi output on my old isa computers. I did attempt to use it with my 8088 single board computer but it doesn't seem to be compatible. More testing will be needed against a different computer to verify it works appropriately, but for now I should not assume 100% CGA compatibility when testing new (to me) computers.
Manual
Note the following correction to the 2 Dip Switch setting MDA mode section. Yellow and white are reversed in the manual (tested via hdmi out only). Correct DIP Settings| 1 | 2 | 3 | 4 | Description |
|---|---|---|---|---|
| ON | OFF | OFF | OFF | MDA 70Hz (HD YELLOW) |
| OFF | ON | OFF | OFF | MDA 70Hz (HD WHITE) |