AT&T UNIX PC emulator

I'm developing an emulator for the AT&T UNIX PC. Currently it can boot the 3B1 UNIX operating system and run acceptably.

The source code is hosted on Bitbucket: https://bitbucket.org/philpem/freebee

You will also need the Boot ROMs.

Steven Hirsch scanned the entire two-binder 3B1 UNIX PC Technical Reference and released them on the Classic Computers Mailing List. With his permission, his scans are mirrored here.

• AT&T UNIX PC Reference Manual (chapters 1 and 2)
• AT&T UNIX PC Reference Manual (chapters 3 and 4)
• AT&T UNIX PC Reference Manual (appendix A: PAL equations)
• AT&T UNIX PC Reference Manual (appendix B: Mnemonics)
• AT&T UNIX PC Reference Manual (appendix C: Expansion memory locations)
• AT&T UNIX PC Reference Manual (International Version Supplement)

• AT&T UNIX PC Schematics: D-08-00222-00 "Schematic: S4, CPU"; alternate versions: 1, 2
• AT&T UNIX PC Schematics: D-32-00379-00 "DMA Address I.C."
• AT&T UNIX PC Schematics: D-32-00381-00 "Video I.C."

• DOS-73 Technical Reference (no schematics)
• Ethernet Expansion Board: Theory of Operation (includes schematics)
• Floppy Tape Interface: Theory of Operation (includes schematics)
• RAM-COMM Expansion Board: Theory of Operation (includes schematics)