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AlphaTekk Software
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Nibbles 68k
Get the latest version now!
View the Program Instructions!
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General Program Information
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The classic snake game of Nibbles (or worms or snakes, etc.)
Basically, this is a game in which you run around the maze trying
to eat fruit while not running into walls or yourself. There are
multiple speed and difficulty settings, and it is a very fun
game. Read the instructions for more information.
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Program Features
- Works on all AMS Versions.
- Works on the TI-89 and TI-92+.
- Quick control response due to low-level keyboard reading.
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Screenshots
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Revision History
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Version 4.3
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Significant code rewrite.
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Efficiency updates.
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Now reads keyboard from custom interrupt.
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Added game clock based on custom interrupt.
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Changed cheat key.
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No longer need to compile separate versions.
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There are now only 5 speed settings.
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Version 4.2
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Replaced interrupt disabling with redirecting so clock
keeps running.
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Updated the program to compile on latest TIGCC (0.96b8).
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Minor code cleanup.
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Version 4.1
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Version 4.0
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Added game logo and graphic-based messages.
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Tweaked keyboard routines for smoother input.
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Changed speed delays (again).
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Added 5-user hiscore board with external score
saving so the program can be archived.
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Revamped intro/options screen for a nicer look.
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Changed difficulty settings.
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Version 3.3
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Improved program efficiency by using low-level keyboard reading.
The keys should no longer be 'jerky'.
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The delay settings are more accurate and spaced out.
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Version 3.2
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Revamped many code sections to improve efficiency.
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Uses a singular array for level storage for added efficiency. Requires
TIGCC 0.9 to compile to take advantage of the GNU ld linker.
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Version 3.1
- Fixed the phantom apple bug, where apples would not be displayed sometimes.
- Fixed the delay handling so the speed settings are more diverse and realistic.
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Version 3.0
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Completely rewritten from scratch by me using TIGCC
(see tigcc.html for more information)
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Apples look more like apples. They are no longer simple blocks.
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The graphics are done with 8-bit sprites now.
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Works under ALL current AMS versions without recompiling except TI-92+
1.00 which has too many bugs. NOTE: IF YOU RUN THIS PROGRAM ON TI-92+
WITH AMS 1.00, IT WILL CRASH YOUR CALCULATOR, GUARANTEED!
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Rereleased under the GNU GPL free software license
(see license.html for more information)
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Uses ROM calls for most (99%) functionality to maintain
compatibility among AMS versions.
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The apple and life indicators are not 4 bytes long instead of 8.
The capacity has been increased from 10 to 16 marks.
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Wait key routine waiting now puts the calculator in idle mode to save battery
life. You can power off the calculator by hitting the ON key when it is in
a wait key loop.
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Changed the victory bonus to 10,000 points per difficulty level.
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Fixed the score display routine so it can display values greater than
655350 (at least 7 digits are possible, but it's hard to get such a high score)
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Changed messages to use dialog pop-up boxes for important messages
(end game dialogs, player died dialogs, etc.)
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Cheaters now have their score reduced to 0 at end game.
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Cheat key was changed, but it is the same key for skipping a level as it is
for infinite lives. But the first time you press it, it gives you infinite
lives, the second (and higher) time you press it, it skips a level.
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High score screen now uses (somewhat more) centered text.
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BSS sections are no longer used as they are not supported natively by the TIOS
(hence, nostub programs cannot use them, only DoorsOS and kernel programs can).
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Version 2.5
- Fixed the program to work with AMS 2.03 using B. Lesteven's AMS 2.0x kernel.
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Version 2.4
- Added BSS sections to reduce program size (made the program 140 bytes smaller).
- Added support for AMS 1.05 (DoorsOS 1.0 Beta 1 untested, but Beta 2 works)
- Added support for TI-92 Plus (AMS 1.00/1.01 and DoorsOS Beta 1 untested)
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Version 2.3
- Fixed bug where the lives display would lock up the calculator if you got more than 10 lives.
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Version 2.2
- Fixed bug where the lives display would display more lives than you had left.
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Version 2.1
- Fixed score bug where score would be erased at 65000 points even if you were not cheating.
- Fixed ESC key bug where it would ignore quit commands during the intro and configuration screens.
- Added variables to control difficulty level options for easy customization.
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Version 2.0
- Completely reworked source code.
- Works with PlusShell 1.0a and DoorsOS 1.0.
- Revamped display methods to work with TI-89 calculator.
- Added 3 difficulty levels for added play control.
- Added scoring system and high score board.
- Revamped intro screen.
- Added infinite lives cheat code.
- Optimized source.
- Changed block size to 8x5 pixels for extra level complexity.
- Rewrote levels for more accurate display on TI-89 screen.
- Added support for TI-92 Plus arrow keys. Should work on TI-92 Plus now.
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Version 1.1.0a
- Recompiled for PlusShell 1.0 compatibility.
- Added remaining lives/apples display to top of screen.
- Thanks to Mike Ingoldby for these revisions.
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Version 1.1.0
- Removed library calls. The Utility Library (util.89z) is no longer required.
- Better documentation. Added game play and installing sections.
- Included information on creating new levels.
- Added a "What's New" file since we now have more than 1 version.
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Version 1.0.0
- Premier Release of Nibbles-89!
- Changed level data to reflect difference in screen size.
- Changed start key to enter key.
- Changed boss key to equal key.
- Changed pause key to enter key.
- Slowed game down because it ran too fast.
- Changed flib library calls to util library calls. The util library is required.
- Fixed Arrow Key Codes to work with the TI-89.
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