Look at the IBM PC/XT/AT if you want something more documented. IBM supplied sch...

userbinator on Jan 11, 2023 | parent | context | favorite | on: What happens when a CPU starts

Look at the IBM PC/XT/AT if you want something more documented. IBM supplied schematics and even BIOS listings for those machines, the newest being a 286 (AT). Thanks to doing some BIOS RE work many years ago, the address F000:E05B still remains in my mind...