bah, it wasn't for the NEC PC88, it's for the IPEX PC88C a compact 1987 XT clone.
So if anyone finds one of those, I have the manual.
Came with MS DOS 3.3, which boots up as "Control Data Systems DOS" - although I didn't make it to the command prompt, by the time it had to load command.com the stuff that grows on them, which I thought I'd cleaned off, clogged the drive head. But at least I know if I clean the donut, they still work, but I'm not sure how useful this OS will be.
Had to clean the drive on the 5150 again, but it's happy again, glad I bought the cleaning diskette.
With the XT Guide to Operations I did get a Diagnostics disk and Exporing your IBM XT, however those disks are in even worse condition (well the media) and I'll have to replace the donuts. Rather than just a mould type growth, these have spots where the surface appears to have popped a little.
Wanted - Dead or Alive - Reward $$$: Compaq Deskpro 8088 / 286 / 386 - IBM RT 6150/6151 parts - AT&T 3B2 partsVC Twitter