Ok, after going at it for several hours, I managed to get a fairly stable install of Win98 running on my IA-1. I kept the ACPI stuff disabled until after I got the OS running, then reenabled it by changing ACPIOption to 1 and installing the ACPI BIOS device. Now, the power LED comes on when the system is in Windows, and everything appears to work normally. The machine even goes into standby.
-> I have two devices that claim to be PCI Communications devices that I don't have drivers for. I believe they are related to the modem, because the modem properties page in the control panel locks up when I try to access it. Device manager does show a Lucent WinModem in the list, and it is shown as working - but I haven't been able to access it yet.
-> There are several duplicate drivers. There are two DMA Controllers, and two PCI busses. The first set were installed with the VIA drivers, the other when I added the ACPI BIOS driver. I've noticed that if I delete the original drivers, the system locks up at boot - very likely the same lockup that occurs during setup with ACPI enabled. They don't appear to harm anything, but it is irritating to have all of those busted devices in device manager. Lastly, there are several IRQ holding drivers - and they appear to be gumming up the works for several other devices. The strange thing is, there is a printer port that doesn't appear to be physically present, but conflicts with one of the IRQ holding drivers.
-> The display doesn't go dark when the screen blanks, and instead stays lit with a blinking cursor in the corner. I've seen postings on this issue before, but no one has found the source of the problem. Has anyone figured this one out yet?