website/content/museum/osm-computer-corporation-zeus-3x.md

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

title	categories	types	origins	years	cpus	params
OSM Computer Corporation Zeus 3X	Computers	Professional Computer	U.S.A.	1983	Zilog Z80A	name image company company_name specs oc_id source Zeus 3X /media/museum/photos/osm_zeus-3x_1.jpg /companies/osm-computer-corporation OSM Computer Corporation label value NAME Zeus 3X label value MANUFACTURER OSM Computer Corporation label value TYPE Professional Computer label value ORIGIN U.S.A. label value YEAR 1983 label value CPU Zilog Z80A label value SPEED 4 MHz label value RAM 64 Kb + 64 Kb x number of users (up to 32) = 2.1 Mb max. label value TEXT MODES 80 x 25 CP/M standard label value GRAPHIC MODES none label value COLORS monochrome through terminal display label value SOUND None label value SIZE / WEIGHT 10x19x27 inches / 60 lbs label value I/O PORTS 4 x serial ports (2 users, 2 master), 1 x parallel port, 1 x 3270 synchronous port label value BUILT IN MEDIA Hard disk (from 12 to 140 Mb) + 20 Mb tape cartridge storage label value OS CP/M, M/PM, MUSE or ZMOS label value POWER SUPPLY Built-in PSU label value PRICE USA (1983) : $10,800 (4 users systems) / $2,294 (4 users increment) 1336 url date https://web.archive.org/web/20230202150823/http://www.old-computers.com/museum/computer.asp?c=1336 2023-02-02

OSM Computer Corporation, based in Santa Clara California, produced several multi-user CP/M computers called Zeus.

The Zeus 3X was released in 1983, and is a natural follow-up of previous systems: Zeus, Zeus II, Zeus 3. The Zeus 3X was available as the same time as theZeus 4, in which it differs in some features (more users, more memory, tape drive, real time clock, etc.) making it more suited for larger companies.

The OSM Zeus 3X is a Z80 based multi-user computer that supports a single hard drive (from 12 to 140 Mb) and up to 32 users (8 only for the Zeus 4) via dumb terminals plugged into RS232 ports. The ports supports several terminal emulations as well as serial printers and modems.

The Zeus computer uses MUSE (Multi User System Executive) as its operating system, a CP/M compatible OS for multi-user computers from OSM. It incorporates all the standard features of CP/M, while adding file management capabilities such as multi-user file sharing, password protection, print spooling, data security and auto-searching. Later, the ZMOS operating system, another multi-user CP/M compatible OS, was also available.

In the november 1984's issue of Computerworld, there is an article describing how Pepsi bought and used Zeus 3X computers to help them cope with orders processing through these multi-user file sharing systems.

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.