The P/20 is a completely new system compared to the P/25 and other Plexus models. It runs ports of the OS and BOOTROM, but is not likely to be backwards compatible in any way.

Models 1015A/1020A Plexus Computers, Inc. The Plexus P/lS and P/20 are powerful 16/32-bit su per micmcomputers specifically desi. ned for the popular UNIX operating system. The PIlS supports 8 usel's and the P/20 with the addi tion of the …

Dec 7, 2016 · From the bitsavers.org collection, a scanned-in computer-related document.

Prepare yourself for an epic first for my channel: a supercut where I combine all five parts of the Plexus P/20 series into one convenient-to-watch video! Join me on a journey of discovery,...

This emulator emulates most aspects of a Plexus P/20 system: you can boot from a hard disk image, log into UNIX and play around. The things currently unsupported are the tape drive, floppy drive, and any Multibus cards.

Jul 19, 2024 · Recently Adrian went through the process of getting a Plexus P/20 working, an early-1980s UNIX tower with 8 RS232 interfaces. The motherboard and power supply needed servicing, though shockingly the MFM hard drive booted into UNIX!

Information Repository for Plexus Unix computers like the Plexus P/20 - misterblack1/plexus-p20

Rare Plexus P20: dual processor multi-user Unix workstation (circa 1985). Part five in the series documenting efforts to restore it to working condition. Recap of parts 1-4: Part 1:Disassembly, motherboard examination, hard drive imaged. Part 2:Power supplies serviced, initial power on, serial port pinout figured out.

This is a pretty faithful Plexus system emulator. It runs more or less in real time, meaning things may take a while. If you get stuck, try the following:

Transcript for:Restoring the Plexus P20: Modern Revival of a Vintage Unix Workstation