The requirements for DOS are much less than for true PC-compatibility, which is why there were many "DOS-compatible" x86 machines in the early days, but they soon fell out of favour as the truly IBM PC-compatible clones took over.
I found this part of the process unusual:
In total my final font-header-file is about 22kB but it was a great relief to use AI for this dumb task. Google Gemini produced a nice font for my BIOS. On individual characters I had to fix some pixel-errors
Instead of simply searching for one of the numerous font-dumps that exist on the Internet, which will already be 100% correct for all of CP437? The CGA font would be a good match (and the one he ended up using looks like it), but there are plenty of other 8x8 fonts available.
> Instead of simply searching for one of the numerous font-dumps that exist on the Internet
On the other hand I enjoy reading about all the things people are recreating with LLMs, since it gives an idea of what's not just possible, but actually practical, in case I ever need something similar.
(This may be a short-lived preference though, if it gets to the point where just about anything within reason is practical.)