Texas Instruments graphing calculators

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This article is about contemporary fan-made clones. For the 2011 source port, see nDoom.

In the mid-1990s, Texas Instruments held a virtual monopoly on graphing calculators in the academic sector. Most models supported third-party applications using a native assembly language as well as the entry-level TI-BASIC, and finished programs could be imported from a PC via serial cable rather than transcribed manually. These factors combined to foster internet file-sharing communities wherein many well-known games received TI calculator clones, including Doom.

None of these were true ports, even after the source release, owing to hardware limitations (the popular TI-83 for example had a 6-MHz processor, with 24K ROM and 32K conventional RAM). The standard approach was to superimpose crude imitations of Doom sprites on a wireframe background representing walls and floors.

ACME Software Doom II[edit]


Doom (author unknown, TI-82 BASIC)[edit]

Doom (author unknown, TI-83 BASIC)[edit]

Doom (Ashu Chaturvedi)[edit]

Doom (Josh Drubin)[edit]

Doom (Cliff Liang)[edit]


Doom86 (Ben Shelton)[edit]

Doom86, a TI-86 Basic game self-described as a "Doom-like game" was released in early March of 2000.[1]


A relatively polished assembler release for TI-83 and TI-83+, supporting multiple weapons, multiple levels, savestates, and OS multitasking. Later remastered as zDoom (no relation) to run on the TI-84+ as well.



In 2005 a second TI-Basic version of Doom was released that included converted sprites from the original game, an assembly programmer noted "I came to the conclusion that FPS games in TI-Basic are unplayable. Well, guess what - I was just proven wrong"[2] it was titled Doom486, and the engine was subsequently used to power a TI-85 port[3] and a TI-86 port of Wolfenstein 3D.[4]


Somehow this program draws recognizable grayscale reproductions of techbase map walls, Doom's title screen, and an intermission screen. It also features keys and a primitive automap. It runs on the TI-89, TI-92+, and Voyage 200.


Doom Collection[edit]

This TI-82 game had nine levels, and actually supported mods via a separate program which could edit the bundled levels in place.

Doom: Epoch Chron[edit]

Doom: Virtual Reality[edit]

TI Doom[edit]

Ultimate Doom[edit]

See also[edit]

External links[edit]



  1. https://www.ticalc.org/archives/files/fileinfo/115/11502.html
  2. https://www.ticalc.org/archives/files/fileinfo/373/37394.html
  3. https://www.ticalc.org/archives/files/fileinfo/374/37477.html
  4. https://www.ticalc.org/archives/files/fileinfo/384/38480.html