It's been a *long* time, but IIRC there is a dip switch on the mainboard which relates to the amount of RAM in use, so adding or removing RAM is impossible unless you know the proper settings for this switch. As is any sort of useful tech support. I have a PowerMate 286 with a small SCSI hard drive which I use as a file server for my ZX81. The unit was a bit of a mess when it landed on my doorstep. I called NEC to ask about the SCSI i/f and was *very rudely* told that the i/f was for tape units only, and would *never* work with a hard drive. When I insisted that the box was booting DOS from the SCSI hard drive, the support droid put me on hold, got his supervisor on the line, and asked me to repeat what I'd said about the box booting from the hard drive. They both laughed like maniacs, one of them called me a moron, and then they hung up on me. NEC == Not Enough Cash in the known universe to induce me to purchase any of their products (except raw semis). Glen 0/0