The AT&T 3B2 was a line of UNIX desktops and servers produced jointly by Western Electric and AT&T starting in 1984, shortly after the Bell System breakup allowed them into the computer market. They are primarily of historical interest because the 3B2 was the main porting platform for AT&T UNIX System V Release 3.
I first became interested in the 3B2 series about 5 years ago, just out of curiosity, and tried to find one. I couldn’t. It turns out they are vanishingly rare, and anybody who knew the architecture well is long retired. So, I set out to reverse engineer and document the 3B2 as well as I could, and to preserve some of the knowledge, history, and software for future generations to study.
Some links available from this page:
- AT&T 3B2/310 and 3B2/400 System Internals
- AT&T 3B2/700 and 3B2/1000 System Internals
- A 3B2/310 and 3B2/400 Emulator implemented in SIMH
- Repository of 3B2 ROM Images
- An AT&T DMD 5620 Terminal Emulator
- The 3B2 Software Archive
- The 3B2 Documentation Archive
- How to Install the UNIX System V Source Code Provision
- The 3B2 FAQ