DOS 18.2065 oscillations rounding errors however have nothing to do with it, as even in one day that makes only a few seconds difference. Here's a few good ones we found. The BIOS Companion - by Phil Croucher. Industry norm tweakbios, and good links. Identifying BIOS version from ID string.
All roads lead to Rome or here it seems.
Uh - motherboards, yes. Take your time. The MC146818 RTC and a CMOS map. Ralf Brown's Interrupt list downloads. For latest public UseNet newsgroup discussions please see Dejanews .