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From: wcs@ho95e.UUCP (#Bill.Stewart.2G202.x0705)
Newsgroups: net.micro.att
Subject: Re: 3b2/400 and floating point
Message-ID: <402@ho95e.UUCP>
Date: Sun, 12-Jan-86 00:24:00 EST
Article-I.D.: ho95e.402
Posted: Sun Jan 12 00:24:00 1986
Date-Received: Tue, 14-Jan-86 03:46:43 EST
References: <2403@gatech.CSNET>
Reply-To: wcs@ho95e.UUCP (Bill Stewart 1-201-949-0705 ihnp4!ho95c!wcs HO 2G202)
Distribution: na
Organization: AT&T Bell Labs, Holmdel NJ
Lines: 21

In article <2403@gatech.CSNET> hope@gatech.CSNET (Theodore Hope) writes:
>I recently unpacked and brought up a 3b2/400, which supposedly comes with the
>WECO 32??? math chip.  
The 32106 Math Acceleration Unit (floating point chip) is optional;
if you don't order it you don't get it.
>			Just to see how fast (or slow) the fp hardware is, I
>wrote a 4 line program, compiled it WITHOUT the infamous '-f' option, and got
>an Illegal Instruction trap.  When compiled WITH '-f,' the program worked.
>Here's the catch:  Since we didn't buy the Software Generation utilities
>(cc, as, ld, etc,) I moved them over from a 3b2/300 (no math chip).
The SGS for the 400 is new.  If you had the original 3B2/300 SGS,
you really don't want to use it for floating point anyway; it was a dog.
Get the new stuff.  (The software licensing agreements are also much
clearer when you buy the software.)

Disclaimer:  I'm speaking as an individual, and this posting is not a
statement of policy by AT&T or its subsidiaries.  (But they'd still
like you to buy the new stuff, and the old FP really *was* a dog :~).

-- 
# Bill Stewart, AT&T Bell Labs 2G-202, Holmdel NJ 1-201-949-0705 ihnp4!ho95c!wcs