Hi all, Thanks to all who sent me their Complete Archives(tm) of whatever brand of PC DOS memory manager they were once using... I now have a fair selection of Qemm, 386MAX and whatnot :) The bad news was... it didn't work. Qemm6 would work, but make the box unstable. MAX and Qemm7 didnt work at all, they froze as soon as they were loaded. Not good. At some point I also noticed the box was acting strangely when heavy network traffic ocurred, *and* that it never showed me the Adaptec's BIOS banner. So... I decided to swap the (DOS) disk into another PC, and try again. Lo and behold... it works. Both Qemm7 and MAX work, and the network card behaves, AND the Adaptec lives :) Looks like I had a sick PC to work with... Said PC is now running DOS 6.22 with the memory manager, MS LANMAN client (using NDIS 2.0 driver and packet driver stub), with a full (licensed) copy of Ersatz-11 on top of that, emulating: - PDP-11/83, 4MB RAM - RQDX3 disk controller - 2x RD54 (160MB) disk - 1x RX50 diskette (emulated to 5.25" HD disk drive) - 1x RX33 diskette (emulated to same) - 1x TQK50 controller with TK50 drive, emulated to TZ30 drive on the Adaptec 1542CP. - 1x TSV05 tape drive, emuated to HP 7980S drive on Adaptec. - 1x DELQA ethernet controller, emulated to E100B through packet driver on top of NDIS stub (yay! ;-) - 1x DZV11 4-port async contr emulated by AST FourPort/XM ISA controller which I re-found in a box of crap ;-) The "machine" is now happily installing Ultrix-11 V3.2 from tape. Real tape, even. Yaaaay! Soon to be online as eagle.pdp11.nl. Cheers, and thanks to all who helped, Fred -- Fred N. van Kempen, DEC (Digital Equipment Corporation) Collector/Archivist Visit the VAXlab Project at http://www.pdp11.nl/VAXlab/ Visit the Archives at http://www.pdp11.nl/ Email: waltje(a)pdp11.nl BUSSUM, THE NETHERLANDS / Sunnyvale, CA, USA