AT&T UNIX PC
AT&T UNIX PC
|Release date||March 26, 1985|
|Media||5¼-inch floppy disks, optional quarter-inch cartridge tapes|
|Operating system||AT&T Unix v3.51|
|CPU||Motorola MC68010 with custom Memory management unit clocked at 10 MHz|
|Memory||512 KB to 4 MB RAM|
|Storage||Optional 10 MB, 20 MB, 40 MB, and 67 MB hard drives|
|Display||720x348 pixel resolution|
|Input||Keyboard, 3-button Mouse|
The AT&T UNIX PC is a Unix desktop computer originally developed by Convergent Technologies (later acquired by Unisys), and marketed by AT&T in the mid- to late-1980s. The system was codenamed "Safari 4" and is also known as the PC 7300, and often dubbed the "3B1". Despite the latter name, the system had little in common with AT&T's line of 3B series computers. The system was tailored for use as a productivity tool in office environments and as an electronic communication center.
- 10 MHz Motorola MC68010 (16 bit external bus, 32 bit internal) with custom, discrete MMU
- Internal MFM hard drive, originally 10 MB, later models with up to 67 MB
- Internal 5-1/4" floppy drive
- At least 512 KB RAM on main board, expandable via expansion cards
- 3 expansion slots
- Monochrome green phosphor 12-inch (300 mm) monitor
- Internal 300/1200 bit/s modem
- RS-232-C serial port
- Centronics parallel port
- 3 phone jacks
The initial PC 7300 model offered a modest 512 KB of memory and a small, low performance 10 MB hard drive. This model, although progressive in offering a Unix system for desktop office operation, was underpowered and produced considerable fan and drive bearing noise even when idling. The modern-looking "wedge" design was innovative, and in fact the machine gained notoriety appearing in many movies as the token "computer."
A later enhanced model was renamed "3B1". The cover was redesigned to accommodate a full-height 67 MB hard drive. This cover change added a 'hump' to the case, expanded onboard memory to 1 or 2 MB, as well as added a better power supply.
Convergent Technologies offered an S/50 which was a re-badged PC 7300.
Olivetti AT&T 3B1
- Microsoft BASIC
- SMC BASIC
- RM COBOL
- RM Fortran
- LPI Fortran
- LPI Pascal
- LPI C
- LPI PL/I
- LPI COBOL
- SVS Fortran
- SVS Pascal
- AT&T BASIC
- GNU C++
- dBase III
- SMART System (Office Suite)
- dBASE III (DBM)
- Informix (DBM)
- Oracle (DBM)
- Multiplan (Spreadsheet)
- Microsoft Word
- AT&T Word Processor
- Crystal Writer
- WordStar 2000
- Samna Word
- SMART Word Processor
- HoneyDanBer UUCP package.
- Various Shells: Bourne, C, and Korn
- SPICE/NUTMEG (circuit simulation tool)
- MGR window system
- DOS-73 8086 co-processor card with 512 KB RAM, an RS-232-C COM2 port and could be fitted with an 8087 math co-processor chip. It included MS-DOS 3.1. This board was designed and built for AT&T by Alloy Computer Products of Framingham MA.
- RAM card could be added using 512 KB RAM or 2 MB RAM cards, up to a maximum of 4 MB (2 MB on the motherboard and 2 MB on expansion cards).
- EIA/RAM combo cards contained extra RAM and two RS-232 serial ports.
- Dual EIA port card
- StarLAN – 1 Mbit/s (1BASE5) network over twisted-pair wire local area network typically used in star format
- Ethernet 10 Mbit/s LAN card (AMD Lance-based) using AUI connector and Wollongong TCP/IP stack/drivers
- VoicePower card allowed for the capture and digital recording of voice conversations.
- Tape drive card provided interface for 23 MB MFM Tape Cartridge Drive.
- Expansion chassis card was hard-wired to Expansion Chassis (with five added slots)
Public domain software
- "3b1 FAQ". unixpc.org. Retrieved 1 August 2019.
- Mayer, Alastair J. W. "System Review: The AT&T UNIX PC" (PDF). Byte. No. May 1986. pp. 254–262. Retrieved 2019-08-01.
- Howitt, Doran (1984-04-08). "At Last, AT&T's 7300/Unix PC". Infoworld. p. 17. Retrieved 2019-08-01.
- "NEW AT&T COMPUTER OFFICE GEAR". Chicago Tribune. March 27, 1985.
- AT&T, Select Code 999-601-311IS, AT&T UNIX PC Owner's Manual (1986)
- "Vendors of Multiuser Microcomputer Products". Infoworld. 1986-10-13.
- "Olivetti Technical Specifications". Olivetti.
- Satchell, Stephen (1985-09-23). "A Look at Software for AT&T's Unix PC". Infoworld. pp. 32–33. Retrieved 2019-07-30.
- AT&T Leapfrogs IBM With the Unix PC., InfoWorld, April 15, 1985, pp. 15–17
- The AT&T Unix PC, article from BYTE magazine Volume 10 Number 05: Multiprocessing (May 1985), pp. 98–106
- The AT&T Unix PC Review, article from BYTE magazine Volume 11 Number 05: Multiprocessing (May 1986), pp. 254–262
- comp.sys.3b1 FAQ
- AT&T 3B1/7300 (UNIX PC) Information
- AT&T UNIX PC at old-computers.com