http://www.microsoft.../sysreqs/pro.mspx

Here's What You Need to Use Windows XP Professional

• PC with 300 megahertz or higher processor clock speed recommended; 233 MHz minimum required (single or dual processor system);* Intel Pentium/Celeron family, or AMD K6/Athlon/Duron family, or compatible processor recommended
• 128 megabytes (MB) of RAM or higher recommended (64 MB minimum supported; may limit performance and some features)


I'm sure it's possible to boot XP on a P-100, 64 MB, but it would be terribly, terribly slow.

We're probably still going to try the USB/ISA thingy, but we're also looking at other options including a USB replacement.

Thanks again for the heads-up! There's few things more frustrating than trying to get PC I/O hardware working properly; if we know that it's a crapshoot, we won't bang our heads against the wall if it doesn't work.

Cheers,
Scott.