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TI calculator port of Marble Madness from the NES


Matthew Shepcar


Release Date

July 13, 1998


TI-82, TI-83, TI-85, TI-86



Vertigo is a TI calculator port of the NES game Marble Madness. The game was programmed in assembly by Matthew Shepcar, and released for the TI-82, TI-83, TI-85, and TI-86 calculators. The game is quite challenging, although the goal is simple: to guide your ball to the gem stone on each of the fifty levels. The levels are split into five worlds, and to complete the game you must win a challenge mode game on each.

The levels are displayed from an isometric 3D view, and on the TI-85 and 86 they are shown in greyscale. Unfortunately, the screen on TI-82 and 83 calculators is quite small and is too slow for greyscale to be effective, so the game may be harder simply because the display isn't as clear.

Significance of Product

  • Why product was important to TI community
  • Any controversy or interesting circumstances surrounding product
  • Awards won, fond memories that people have


  • How to use the product
  • Can copy the author's readme file (if available)

Development History

v0.8 - 13th July [86]

Initial release (TI-86 only)

v0.9 - 14th July [83/86]

Option to view scores from main menu added
TI-83 version also released

v0.91 - 15th July [83/86]

Customisable keys added
New title logo

v0.92 - 18th July [82/83/86]

Suicide button added (it is possible to get trapped on some levels)
You can now create new worlds if no worlds are installed :)
TI-82 version released!!

v0.93 - 20th July [82/83/85/86]

Fixed serious TI-82 bug which caused system vars to be corrupted
(window range etc.)
Acceleration constant increased - world 2 level 4 now possible :)
Contrast increased by 2 settings on loading on the 85/86
Down can now be used as a custom key and minus can't. *grin*
TI-85 version released (without editor)
Source code released: ENJOY!! :)

v0.94 - 3rd September [82/83/85/86]

Fixed high score table initialisation for new worlds (no more fuzzy
patterns :)
Wrote VertLCon 0.5
Increased bounciness constant - world 2 level 2 now easier again
Fixed bug which caused the ball to roll UP very steep slopes
Added link routines to allow world transfer from main menu
Got the TI-85 level editor working :)


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