Hacking the Book8088 for Better Accuracy
The Book8088 is trying hard to basically be compatible with the original IBM PC, containing some of the same or equivalent chips. It’s natural to want to put it through its paces, and one of the best tests for IBM PC compatibility has to be the 8088MPH demo. If 8088MPH will run we must be operating pretty darn close to the original.
Now, as it turns out, most of the demo does run, albeit in RGBI mode which loses out on all the cool composite artifact color effects. But most notably the famous Kefrens Bars effect does not display - the screen just goes blank. What’s going wrong on the Book8088 vs a real IBM PC 5150?