IBM PCjr BIOS dump
The IBM PCjr BIOS is very well documented in the IBM PCjr Technical Reference manual (a must read for every PCjr developer). The only problem is that navigating that code is not easy. It has all the problems from scanned books: the fonts don’t look good no hyper-links and difficult to search So I dumped the BIOS and started analyzing it with IDA Pro - Free version. I added some of the original comments from the Technical Reference manual, and added some comments of my own. ...