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Your first chess program.
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H.G.Muller



Joined: 10 Mar 2006
Posts: 12912
Location: Amsterdam
PostPost subject: Re: Your first chess program.    Posted: Fri Apr 20, 2012 6:10 pm Reply to topic Reply with quote
In 1977, when I was working on my bachelor's degree in chemistry, a friend of mine, (who had a real job, and the money that came with it, but no knowledge of electronics), had bought a kit for home-building a computer, which he wanted to use to automate his model railway. When the system did not work after he soldered the components together, he brought it to me for troubleshooting, because I had an oscilloscope. In the two weeks that the computer was at my place, I wrote a Chess program for it in assembly code. (Well, more in machine code, actually: I had to poke the hexadecimal instructions into memory, as there was no symbolic assembler.)

The home-built system was based on a 1MHz 6800 CPU, had a 2KB memory card, a video card with 40 x 25 character resolution, 2KB of ROM for what we would now call the BIOS, and storage of programs on audio tape at 300 bits per second. The Chess program ('Usurpator I') did pretty much fill the entire 2KB RAM, and could not castle or e.p. capture. It could win KQK, though.
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Subject Author Date/Time
Your first chess program. Dan Honeycutt Fri Apr 20, 2012 1:07 pm
      Re: Your first chess program. Martin Sedlak Fri Apr 20, 2012 1:28 pm
            Re: Your first chess program. Sam Hamilton Fri Apr 20, 2012 2:15 pm
            Re: Your first chess program. Joshua Shriver Sun Apr 22, 2012 4:54 am
                  Re: Your first chess program. Ted Wong Sun Apr 22, 2012 6:28 am
      Re: Your first chess program. Thomas Petzke Fri Apr 20, 2012 2:02 pm
      Re: Your first chess program. Don Dailey Fri Apr 20, 2012 4:07 pm
      Re: Your first chess program. Gerd Isenberg Fri Apr 20, 2012 5:31 pm
      Re: Your first chess program. H.G.Muller Fri Apr 20, 2012 6:10 pm
      Re: Your first chess program. Jan Brouwer Fri Apr 20, 2012 7:05 pm
            Re: Your first chess program. Mark Lefler Sat Apr 21, 2012 11:59 pm
                  Re: Your first chess program. Don Dailey Sun Apr 22, 2012 12:11 am
                        Re: Your first chess program. Ed Schroder Sun Apr 22, 2012 8:28 am
                              Re: Your first chess program. Don Dailey Sun Apr 22, 2012 11:23 am
                              Re: Your first chess program. J. B. Buijs Sun Apr 22, 2012 2:03 pm
                                    Re: Your first chess program. Don Dailey Sun Apr 22, 2012 2:22 pm
                                          Re: Your first chess program. Dan Honeycutt Sun Apr 22, 2012 4:18 pm
                                                Re: Your first chess program. Don Dailey Sun Apr 22, 2012 4:23 pm
                                                      Re: Your first chess program. Dan Honeycutt Sun Apr 22, 2012 4:31 pm
                                                            Re: Your first chess program. Ed Schroder Sun Apr 22, 2012 5:11 pm
                                                                  Re: Your first chess program. Julien MARCEL Sun Apr 22, 2012 7:35 pm
      Re: Your first chess program. Robert Hyatt Fri Apr 20, 2012 7:34 pm
            Re: Your first chess program. Julien MARCEL Fri Apr 20, 2012 11:33 pm
      Re: Your first chess program. J. B. Buijs Sat Apr 21, 2012 6:27 am
      Re: Your first chess program. Evert Glebbeek Sat Apr 21, 2012 6:32 am
      Re: Your first chess program. Jon Dart Sat Apr 21, 2012 7:27 pm
            Re: Your first chess program. Martin Brown Mon Apr 23, 2012 10:19 am
                  Re: Your first chess program. Jon Dart Tue Apr 24, 2012 12:01 am
      Re: Your first chess program. Harald Lüßen Sat Apr 21, 2012 11:20 pm
            Re: Your first chess program. F. Bluemers Sat Apr 21, 2012 11:44 pm
                  Re: Your first chess program. Harald Lüßen Sun Apr 22, 2012 8:43 am
                        Re: Your first chess program. Matthias Hartwich Mon Apr 23, 2012 8:11 pm
                              Re: Your first chess program. Thorsten Czub Tue Apr 24, 2012 6:50 pm
      Re: Your first chess program. Joshua Shriver Sun Apr 22, 2012 4:43 am
      Re: Your first chess program. Ron Murawski Mon Apr 23, 2012 12:16 am
            Re: Your first chess program. Vincent Diepeveen Mon Apr 23, 2012 8:38 am
            Re: Your first chess program. Evert Glebbeek Mon Apr 23, 2012 8:45 am
                  Re: Your first chess program. Ron Murawski Wed Apr 25, 2012 4:45 am
      Re: Your first chess program. Martin Brown Mon Apr 23, 2012 9:36 am
      Re: Your first chess program. John Merlino Tue Apr 24, 2012 1:06 am
            Re: Your first chess program. Vincent Diepeveen Tue Apr 24, 2012 5:28 pm
                  Re: Your first chess program. John Merlino Tue Apr 24, 2012 6:41 pm
      Re: Your first chess program. Oscar Toledo G. Fri May 04, 2012 5:28 pm
      Re: Your first chess program. Giorgio Medeot Thu May 10, 2012 3:50 pm
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