2020-07-01 16:22:16 +02:00
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GAMMON IV (VT100 ANSI EDITION)
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By: David C. Oshel 1219 Harding Ave. Ames, Iowa 50010
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2020-12-02 15:36:30 +01:00
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This is a patched version of “Gammon IV, Version 2.0, April 1, 1986”, a
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2020-07-01 16:22:16 +02:00
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full-screen backgammon for CP/M.
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I patched the game to use VT100 compatible escape sequences (including
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ANSI color).
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2020-12-02 15:36:30 +01:00
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Therefore, I removed most of the “user patch area” and hardcoded the
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2020-07-01 16:22:16 +02:00
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VT100 sequences in the C code, replaced the asm code of gotoxy() with C
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2020-12-02 15:36:30 +01:00
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code and removed the Kaypro graphics routines (and the “G(raphics”
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2020-07-01 16:22:16 +02:00
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command) as it is not needed for my VT100 version.
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BACKGMMN.COM is the compiled and ready-to-run game.
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Have fun playing!
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Anna Christina Naß acn@acn.wtf
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Compiling the game
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See Compiler/Compiling.md for information on compiling the game on CP/M.
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From the original Version 2.0 READ.ME:
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Improvements for Version 2.0 include:
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a) Several bugs and poltergeists, especially in the Arrange command,
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have been completely exorcised. No bugs have been found in the Play
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command for months; but, as before, Gammon IV will not invariably
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recognize a forced move, either in your play or in its own. Gammon
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IV knows and obeys all other official rules of backgammon.
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2020-12-02 15:36:30 +01:00
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b) There are no “hidden” commands anymore. All commands are now shown
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2020-07-01 16:22:16 +02:00
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in the command lines, including X(pert.
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c) Input error handling now documents the BAR, HOME and HELP commands,
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so first-time players do not need to read anything else in order to
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play the game successfully. The X(pert mode dispenses with these
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messages, so X(pert actually does mean expert, now!
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2020-12-02 15:36:30 +01:00
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d) The “break” command is Control-C again, instead of ESCAPE. It was
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2020-07-01 16:22:16 +02:00
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all too easy to hit ESC instead of 1 on the Kaypro keyboard, leading
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to an inadvertently paused game.
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e) The sanction against cheating (your opponent became Torve) has been
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removed.
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f) If the cube is doubled during the opening rolloff to see who goes
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first, and the cube value reaches 8, additional pairs on the dice
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2020-12-02 15:36:30 +01:00
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have no further effect. The cube’s opening value will not go
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2020-07-01 16:22:16 +02:00
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above 8.
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2020-12-02 15:36:30 +01:00
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The computer’s three styles of play have not been changed. Judging from
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the feedback I’ve received, Gammon IV plays acceptably well at the
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2020-07-01 16:22:16 +02:00
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current levels. All information needed to re-compile the program is
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included in the BACKGMMN.C file, including the details of C/80 3.1
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configuration. The compile and link steps are governed by BACKGMMN.SUB.
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This program is in the public domain, so distribute it freely.
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Enjoy!
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David C. Oshel
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1219 Harding Ave.
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Ames, Iowa 50010
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