Message-ID: <53@vice.UUCP>
Date: Mon, 12-Nov-84 12:36:42 EST
Article-I.D.: vice.53
Posted: Mon Nov 12 12:36:42 1984
Date-Received: Tue, 13-Nov-84 06:49:55 EST
Organization: Tektronix, Beaverton OR
Lines: 9

Recently, I put a 8087-4 on my XT.  I ran through DOS diagnostics
without any problem.  However, a small benchmark (about 10 lines
in basic) showed no sign of improvement in speed.  The benchmark
primarily consists of square root, exponential, and sin/cos.  It
took 400 seconds for w/ and w/o 8087.  Is it because BASIC
interpreter works much slower than those math operations?  Or it
is because 8087 compatability problem?  Or even it is simply a
bad chip?  Does anyone out there experience same sort of problems?
I appreciate it if somebody can give me some suggestions?

Message-ID: <2388@tekig.UUCP>
Date: Tue, 13-Nov-84 11:38:11 EST
Article-I.D.: tekig.2388
Posted: Tue Nov 13 11:38:11 1984
Date-Received: Thu, 15-Nov-84 03:08:54 EST
References: <53@vice.UUCP>
Organization: Tektronix, Beaverton OR
Lines: 10


 >  Recently, I put a 8087-4 on my XT.  I ran through DOS diagnostics
 >  without any problem.  However, a small benchmark (about 10 lines
 >  in basic) showed no sign of improvement in speed. 

The 8087 requires its own op-codes.  Basic written to be used on a system
without an 8087 will not generate these op-codes (unless there is some
switch in the basic operating system).  In order to use the 8087 you will
have to find some software that has these op-codes built in.  Turbo 
Pascal from Borland can compile to use the 8087.

Message-ID: <397@hoxna.UUCP>
Date: Fri, 16-Nov-84 08:57:42 EST
Article-I.D.: hoxna.397
Posted: Fri Nov 16 08:57:42 1984
Date-Received: Sat, 17-Nov-84 05:14:04 EST
References: <2388@tekig.UUCP>
Organization: Bell Labs, Holmdel NJ
Lines: 3

xxx
Computer Innovations C and most other good C compilers can compile
code for the 8087.

Message-ID: <1200001@ur-univax.UUCP>
Date: Tue, 13-Nov-84 14:24:00 EST
Article-I.D.: ur-univa.1200001
Posted: Tue Nov 13 14:24:00 1984
Date-Received: Sat, 17-Nov-84 05:21:59 EST
References: <53@vice.UUCP>
Organization: University of Rochester: Computing Center
Lines: 7
Nf-ID: #R:vice:-5300:ur-univax:1200001:000:246
Nf-From: ur-univax!dela    Nov 13 14:24:00 1984

The reason that your program didn't run faster is that the basic
interpreter doesn't take advantage of the 8087 in your machine;
basic remains blissfully ignorant of your attempts to make it's life
easier!

Gene Hartquist
rochester!ur-univax!del