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- Newsgroups: comp.sys.misc
- Path: sparky!uunet!usc!sdd.hp.com!caen!batcomputer!cornell!rochester!rocksanne!news
- From: cobrin@rx.xerox.com (Steve Cobrin)
- Subject: Re: Burroughs B20
- Message-ID: <1992Nov16.144706.16666@spectrum.xerox.com>
- Keywords: BTOS, CTOS, Unisys
- Sender: news@spectrum.xerox.com
- Reply-To: cobrin@rx.xerox.com
- Organization: Rank Xerox, Welwyn Garden City, UK
- Date: Mon, 16 Nov 1992 14:47:06 GMT
- Lines: 48
-
- Gosh, blast from the past time :-)
-
- I worked on B20's just when Sperry and Burroughs merged about 7 years
- ago. They were OEM'd by Burroughs from Convergent Technology who called
- them NGen's. They were Intel based, and by the time I left B38 had '386
- chips fitted in them.
-
- The really neat thing about them, was that the modules (extras disks,
- floppy's, etc) were added by just addding another "slice". The main
- processor box was just slightly smaller than a Sun IPC/IPX box on its
- side, to add another one just plugged in the another box, via some clip
- mechanism, I never ever had to open a box. Power supplies were
- separate, and consisted of "power-bricks" which one just plugged in to
- the slices as one needed to.
-
- The Operating System CTOS/BTOS version 2 (when I left), was probably
- one of the best documented OS's I had seen since Unix Version 7, the
- documentation was all based on the Systems Programming Language, which
- was a superset of Pascal. It was a pleasure to use. We actually used C
- on it, which wasn't quite as well integrated as the Pascal, but still
- more than adequate. We ported Sperry's DCA architecture to run on it,
- to allow a B20 to appear like a real Sperry host.
-
- When we had the '286 and above versions, CTOS supported memory
- management and multitasking long before DOS and its successors managed
- to provide it. The main problem, I guess was the price, and lack of
- marketting, lack of support of fancy graphics and screens. They were
- and still are quite popular in Local Government and Banking markets.
-
- Convergent also used to make minis running CTOS, and at one point sold
- Unix Servers to Unisys which had CTOS underlying them. Nowadays I
- believe Convergent/CTOS (or whatever it now called) is POSIX
- compliant.
-
-
- -- Steve
-
- Arpa Email address: cobrin.sbd-e@RX.Xerox.COM
- +------------------------------------------+---------------------------------+
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