Author: Robert Hyatt
Date: 12:00:02 05/17/99
Go up one level in this thread
On May 17, 1999 at 14:15:22, José de Jesús García Ruvalcaba wrote: >On May 17, 1999 at 09:28:31, Robert Hyatt wrote: > >>On May 17, 1999 at 00:36:39, James B. Shearer wrote: >> >>>On May 14, 1999 at 09:52:14, Robert Hyatt wrote: >>> >>>>On May 14, 1999 at 01:38:11, Gregor Overney wrote: >>> >>> <snip> >>> >>>>> >>>>>2) You still need to write the correct algorithms to make this chip work. And >>>>>those algorithms are pretty complex (see evaluation functions etc.) >>>>> >>>> >>>>But it has _already_ been done. All that is left is to use the "new" fab >>>>process to increase density and clock speed.. DB's chess chips only ran at >>>>20-24 megahertz. running that up to 16x faster seems quite easy with todays >>>>silicon capabilities as that would still be a modest < 400mhz processor. >>> >>> This assumes: >>>1) Hsu's startup has the right to use the IBM deep blue code. >> >>He's already publicly stated that he is doing this, so I would assume that >>permission has already been granted? >> >> >> >>>2) The IBM deep blue code (written for the big endian power chips) can be >>>trivially ported to the (little endian) Intel chips used in PCs. >>> I would doubt both of these assumptions. >>> James B. Shearer >> >>(2) is a non-issue. IE 'crafty' is much more 'endian' aware than DB, yet it >>runs on big-endian and little-endian machines with no problems at all. The >>PCI interface could 'correct' the endian-order of the data without the chip >>ever knowing... > > One of the very few things I do not like in crafty is the opening book's >sensitivity to endian-ness. Crafty is a great program anyway, even if I play >with a small book. This will be fixed one day. It isn't difficult, just time-consuming, as the best approach is to read in byte-by-byte and then shift/add things together to make a word. of course, the XDR routines could do that too, but since 'long long' is non-ANSI at present, that is touchy...
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