I have in hardcopy the "IBM Technical Reference Personal Computer XT and
Portable Personal Computer, 6361459. It is in a mini 3 ring binder.
I don't have it scanned, nor am I willing to scan it. However, if you
cannot find electronic versions, perhaps there are parts of the manual
you want. If you want JUST the system board schematics, then I will
scan the 20 or so pages, but it might take a while. It would be easier
for me to photocopy the 20 or so pages and send them along.
regards,
Joe Heck