Geneve 9640

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Type Home computer
Release date 1987; 31 years ago (1987)
Operating system MDOS
CPU TI TMS9995 @ 12 MHz
Memory 640K RAM
Graphics 512×212, 512×424, 256-color

The Geneve 9640 is an enhanced TI-99/4A clone which was built by Myarc as a card to fit into the TI Peripheral Expansion System and used an IBM PC XT detached keyboard as well as a mouse. Released in 1987, it was in many ways similar to the earlier TI-99/8 which was in prototype form in early 1983. The Geneve, its custom ASIC chip, and the MDOS operating environment were designed by Paul Charlton.[1] The graphical swan on the boot up screen was designed by Mi-Kyung Kim.[2]

The unit included a faster processor (12 MHz TMS9995), enhanced graphics with 80 column text mode (via the Yamaha V9938 video display processor), 16 bit wide RAM, MDOS, and was compatible with nearly all TI software. An adapter was available from a company called Rave to allow the sidecar-only Speech Synthesizer to be installed inside the Peripheral Expansion System.

Bundled Software[edit]

  • Cartridge Saver, allowing most cartridges to be saved to and run from disk
  • GPL - program used to set up a 99/4a environment to run software saved by Cartridge Saver or most other 99/4a-specific software
  • Advanced BASIC, supporting 80 columns and compatible with TI BASIC and TI Extended BASIC
  • Pascal Runtime (not officially released by Myarc)
  • TI-Writer Word Processor, upgraded to 80 columns, increased speed
  • Microsoft Multiplan, upgrade to 80 columns, increased memory, and increased speed
  • MDOS, the Myarc Disk Operating System


  1. ^ "The TI-99 Home Computer Encyclopedia: Timeline 99 - 1987". Archived from the original on February 8, 2006. Retrieved 2008-12-26.
  2. ^ "John Birdwell Memorial Award". Archived from the original on 2013-04-15. Retrieved 2008-12-26.

External links[edit]