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From: cwd@cuae2.UUCP (Chris Donahue)
Newsgroups: net.micro.att
Subject: Re: What is a 3B2/400?
Message-ID: <357@cuae2.UUCP>
Date: Wed, 10-Jul-85 09:26:59 EDT
Article-I.D.: cuae2.357
Posted: Wed Jul 10 09:26:59 1985
Date-Received: Fri, 12-Jul-85 00:53:10 EDT
References: <1129@hou5e.UUCP> <348@cuae2.UUCP> <1950@ukma.UUCP>
Reply-To: cwd@cuae2.UUCP (Chris Donahue)
Followup-To: Replacement disksfor the 3B2/300
Organization: AT&T-IS, /app/eng, Lisle, IL
Lines: 33
Keywords: new product, faster, bigger, etc.
Summary: 

The AT&T 3B2/400 Computer was announced about 2 weeks ago. The 3B2/400 is
architecturally the same as a 3B2/300, but several capacity upgrades and
performance upgrades are included.

The 3B2/400 is based on the WE32100 at 10MHz versus the WE32000 at 7.2MHz
in the 3B2/300. The WE32100 has a 64 instruction cache on the chip and
boosts the 3B2/400s MIP rate to 1.1 MIPs (versus .65 for the 3B2/300).

The 3B2/400 supports the WE32106 Math Accelerator Unit (MAU). The MAU
supplies hardware floating point support which the 3B2/300 sorely needed
in some cases.

The 23MB cartridge tape is integral to the unit along with the floppy disk
drive. Two hard disks (any combo of 30 and 72MB) can reside internal to the
3B2/400 (one disk internal to the 3B2/300).

Up to 4MB of main memory can reside in the box (2MB for the 3B2/300).

The I/O backplane contains 12 I/O slots versus 4 for the 3B2/300.
(1 slot is used by the cartridge tape controller so 11 are available).

The 3B2/400 will support up to 25 users versus 8-12 supported by the 3B2/300.

Size wise, the 3B2/400 is about twice as high as the 3B2/300 and a little
bit larger in footprint.

I don't think I missed anything.

End of product summary.

Chris Donahue
AT&T Info. Sys.
Application Engineering