Author: Robert Hyatt
Date: 10:01:14 07/11/02
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On July 11, 2002 at 12:19:40, Keith Evans wrote: >On July 11, 2002 at 11:57:05, Robert Hyatt wrote: > >>On July 11, 2002 at 09:03:20, Rolf Tueschen wrote: >> > >>>The Hsu team of IBM did avoid it by introducing GM Benjamin into the testings. >>>IMO he had to check nonsense and contradictions of the play in relation to the >>>books. >> >>Apples and oranges. The DB guys _never_ tried to tune their program while >>running at 1/1000th the speed of the real machine. That was the problem we >>fell into. They had access to their machine all the time and could test in >>any way they wanted. We had little access to the Cray except right before >>an annual computer chess tournament, so all our development was _forced_ >>onto a VAX, which was far slower. >> > >How did you do your Cray development on a Vax? Did Cray supply an emulator? > >Regards, >Keith No. We were a FORTRAN-based program, and we just ran the cray-optimized version right on the vax after compiling with the vax compiler. It was horribly inefficient since the vax didn't know beans about vectors but it ran perfectly, just slowly... We always had FORTRAN versions of everything, even if we rewrote things in Cray Assembly for speed. That way we could change the fortran first (a far easier task) to check out a new idea. If it worked, we then had to modify the assembly code (a much harder task).
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