website/content/museum/att-unix-pc.md

title, categories, types, origins, years, cpus, params

title	categories	types	origins	years	cpus	params
ATT Unix PC	Computers	Professional Computer	U.S.A.	1985	Motorola MC68010	name image company company_name specs tabs forum_thread links oc_id source Unix PC /media/museum/photos/att_unixpc_system_s1.jpg /companies/att ATT label value NAME Unix PC label value MANUFACTURER ATT label value TYPE Professional Computer label value ORIGIN U.S.A. label value YEAR 1985 label value BUILT IN LANGUAGE Bourne Shell Scripting, C and ASM with optional Software label value KEYBOARD Detachable 103-key QWERTY label value CPU Motorola MC68010 (16 bit external bus, 32bit internal) with custom MMU label value SPEED 10 MHz label value CO-PROCESSOR Custom Gate Arrays for DMA (3), 8088 (86?) on optional DOS-73 label value RAM 512 KB / 1 MB / 2 MB / 4 MB label value ROM 16 KB EPROM holding Boot Strap, Diagnostics etc. label value TEXT MODES 80 columns x 29 rows label value GRAPHIC MODES 348 x 720 on built-in 12'' Monitor label value COLORS Green On Black Monochrome label value SOUND Beeper label value I/O PORTS Centronics, RS-232c, Tip/Ring Line Modular Phone Jacks (2), RJ11 Phone Jack (1). Internal Expansion Slot (3), Internal 300/1200 bps modem label value BUILT IN MEDIA 10 or 20mb hard drive then later 40 and 67mb hard drive. 5 1/4 label value OS AT&T Unix v3.51, Unix based on System V r2 with extensions from BSD 4.1, BSD 4.2, SysV r3 and Convergent Technologies label value POWER SUPPLY Built-in PSU label value PERIPHERALS Three button optomachanical mouse\ Ethernet\ DOS-73 board, 512kb RAM board, 2mb RAM board, Dual EIA Port board\ EIA/RAM Combo board\ 23 MB Tape Drive label value PRICE $5590 for 10mb HDD, 512Kb RAM and Unix\ $6590 for 20mb HDD, 1mb RAM and Unix\ $1195 for 512kb expansion card links 1134 title url text AT&T 7300/3b1 (UNIXPC) Stuff http://www.unixpc.org/ title url text Unix PC Archive Holdings http://unixpc.taronga.com/ 1164 url date https://web.archive.org/web/20230328011733/http://www.old-computers.com/museum/computer.asp?c=1164 2023-03-28

The AT&T UnixPC was AT&T's attempt to get into the business computer market of the mid-1980s. There were two flavors of this machine: the 7300, and the 3B1. Basically the circuitry is identical in both machines however the 3B1 allowed more room for hard-drive storage, as shown with the ominous bulge underneath the screen. (not shown in model above).

The windowing manager was absolutely wonderful keeping the UNIX system well hidden, however, you could naturally open a shell and interface directly. The graphics system was neat as well - there is a 3D bitmap demo online somewhere.

These computers could support 3 terminals with an add-on card for concurrent use by up to 4 users (one at he console, one on the built-in port, and one each on the two add-on ports).

The keyboard could be "nested" on the shelf in front of the floppy drive. The sound was limited to beeps.

There was also an add-on board with a speech synthesizer which could turn the UnixPC into a full-fleged voicemail management system.

An absolutely wonderful and advanced computer for it's time, which can still teach modern computers a lesson in innovation.

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Contributors: Domenic Schipani, Gary Clouse

We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.