Author: Brian Richardson
Date: 11:00:12 05/16/01
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On May 16, 2001 at 11:45:08, Robert Hyatt wrote: >On May 16, 2001 at 09:10:42, Joshua Lee wrote: > >> >>>>>Burroughs B5500 >>>> >>>>very slow >>> >>>About 1 MIPS was claimed, not sure if it was true. Very weird machine with a 47 >>>bit word, stack based. The instruction set was optimised for small code size >>>rather than speed. The operating systems were multi-user multi-tasking, but >>>there was no memory protection in the hardware. The compilers were supposed to >>>generate code that never mangled other programs memory, and you weren't supposed >>>to use assembler. I never got to use one (i'm not sure if any were even sold in >>>my country) so i can't vouch for how well it all worked. I have worked on a B5500. To the best of my recollection, it was a 48 bit machine with a stack architecture. The instruction set was designed to optimize Algol code (most of the operating system was written in Algol MCP - master control program and CANDE control and edit interface). I also _think_ it was the first system with virtual memory (which would imply some protection scheme). Brian >>> >>>I didn't know anyone wrote a chess program for these. >>> >> >>All i could find about this one so far is that COKO III was written in FORTRAN >>IV and had been executed on IBM 7044, 360/50, 65, 91 PDP 10, UNIVAC 1108 and >>the B5500/6500. also The Marsland Chess Program. I am sure i will end up finding >>some other hardware to ask about so look out for my posts i will use the same >>name. Thankyou > > >Ed Kozdrowicki sent me a copy of the source code for Coko IV, about 80,000 >lines of Fortran. It was the second source program I saw (other than mine) >and played with. It was lost 20+ years ago unfortunately. I also had a >copy of the greenblatt program source (dec assembly language) but it was also >lost many years ago.
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