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6,654 pages: 1,289 machines, 702 software, 460 companies, 64 history, 17 articles, 59 fun.
4,336 media files so far; references to files not downloaded yet are left out.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ
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co-authored by Claude Opus 5.5
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---
title: Texas Instruments Computer 99/8
categories:
- Computers
types:
- Home Computer
origins:
- U.S.A.
years:
- '1983'
cpus:
- TI TMS 9995
params:
name: Computer 99/8
company: /companies/texas-instruments
company_name: Texas Instruments
specs:
- label: NAME
value: Computer 99/8
- label: MANUFACTURER
value: Texas Instruments
- label: TYPE
value: Home Computer
- label: ORIGIN
value: U.S.A.
- label: YEAR
value: '1983'
- label: END OF PRODUCTION
value: '1983'
- label: BUILT IN LANGUAGE
value: TI Extended Basic II
- label: KEYBOARD
value: QWERTY full-stroke keyboard, 54 keys
- label: CPU
value: TI TMS 9995
- label: SPEED
value: 10,7 MHZ
- label: CO-PROCESSOR
value: TMS 9918A (Video Generator)
- label: RAM
value: |-
64 kb (up to 15Mb !)\
61 kb free with Basic
- label: VRAM
value: 16 kb
- label: ROM
value: 220 Kb
- label: TEXT MODES
value: 32 x 24 (16 colors) / 40 x 24 (2 colors)
- label: GRAPHIC MODES
value: 64 x 48 (with 4x4 graphic symbols), 256 x 128 (16 colors), 256 x 192 (16 colors)
- label: COLORS
value: '16'
- label: SOUND
value: 3 channels & 5 octaves, speech synthesizer built-in
- label: I/O PORTS
value: Tape, RGB video out (DIN), Joystick, HexBus connector, Expansion port (16 bits), Cartridge slot (GROM port)
- label: OS
value: P-System
- label: PRICE
value: planned for 600$
tabs:
- photos
- emulators
- links
- docs
- videos
photos:
- title: KEYBOARD/LABEL
subtitle: ''
text: ''
image: null
emulators:
- title: Mess emulator
url: http://www.mess.org
platform: MS DOS
text: Emulates all of the TI-99 versions, including the Geneve card
- title: PC99
url: http://pw2.netcom.com/~mjmw/index.html
platform: MS DOS
text: Quality emulator for the TI 99/4A
- title: Classic99
url: http://www.harmlesslion.com/software/Classic99
platform: Windows
text: Open Source & freeware TI-99/4A emulator for Windows 9x
- title: Win994a
url: http://www.99er.net/win994a.shtml
platform: Windows
text: Win994a is a TI-99/4A simulator written by Cory Burr that installs and runs in Windows
- title: MacV9T9 official homepage
url: http://perso.club-internet.fr/pytheas/english/MacV9T9.html
platform: Apple
text: MacV9T9 is a TI99 emulator for the Macintosh
links:
- title: planet-99.net
url: http://www.planet-99.net/
text: Lots and Lots of 4A software on this site. Disks, Cartridges, Articles - the lot!
- title: Somtimes
url: http://sometimes.99er.net/
text: Demo cartridges
- title: TI-99 4/A Forever !
url: http://www.ti99.com
text: Excellent site with special pages about the Computer 99/8
- title: TI-99 4/A Webring
url: http://e.webring.com/hub?ring=ti994a
text: You know what it is ;-)
- title: TI-99 Forever !
url: http://www.ti99.com
text: Excellent site by Fabrice Montupet
- title: TI-99/4 Home Page at 99er.Net
url: http://www.99er.net/
text: THE us site to visit !
- title: Web Wiz CAPTCHA
url: http://www.webwizcaptcha.com
text: Discussion about Texas Instruments computers
docs:
- title: USER'S REFERENCE GUIDE
url: http://www.classiccmp.org/dunfield/ti/index.htm
cover: null
text: |-
[**USER'S REFERENCE GUIDE**](http://www.classiccmp.org/dunfield/ti/index.htm)written by Texas Instruments
 compiled/archived by Dave Dunfield\
 type of document : PDF\
 source : [Daves Old Computers](http://www.classiccmp.org/dunfield/)
- title: BEGINNER'S BASIC
url: http://www.classiccmp.org/dunfield/ti/index.htm
cover: null
text: |-
[**BEGINNER'S BASIC**](http://www.classiccmp.org/dunfield/ti/index.htm)written by Texas Instruments
 compiled/archived by Dave Dunfield\
 type of document : PDF\
 source : [Daves Old Computers](http://www.classiccmp.org/dunfield/)
- title: BASIC REFERENCE CARD
url: http://www.classiccmp.org/dunfield/ti/index.htm
cover: null
text: |-
[**BASIC REFERENCE CARD**](http://www.classiccmp.org/dunfield/ti/index.htm)written by Texas Instruments
 compiled/archived by Dave Dunfield\
 type of document : PDF\
 source : [Daves Old Computers](http://www.classiccmp.org/dunfield/)
- title: GETTING STARTED WITH THE TEXAS INSTRUMENTS TI99/4A
url: http://shawweb.myzen.co.uk/stephen/book.htm
cover: /media/museum/docs/couvs/vide.gif
text: |-
[**GETTING STARTED WITH THE TEXAS INSTRUMENTS TI99/4A**](http://shawweb.myzen.co.uk/stephen/book.htm)written by Stephen Shaw
 compiled/archived by Stephen Shaw\
 type of document : HTML\
 source : [Stephen's Main Web Page](http://shawweb.myzen.co.uk/stephen)
- title: PROGRAMMING DISCOVERY IN TI BASIC STUDENT GUIDE
url: http://www.99er.net/docs.html
cover: null
text: |-
[**PROGRAMMING DISCOVERY IN TI BASIC STUDENT GUIDE**](http://www.99er.net/docs.html)written by Texas Instruments Computer Advantage Club
 compiled/archived by Rich at www.99er.net\
 type of document : Unknown\
 source : [TI-99/4A Home Computer Page](http://www.99er.net/)
- title: TI-99/4A CONSOLE & PERIPHERAL EXPANSION SYSTEM TECHNICAL DATA
url: http://www.99er.net/docs.html
cover: null
text: |-
[**TI-99/4A CONSOLE & PERIPHERAL EXPANSION SYSTEM TECHNICAL DATA**](http://www.99er.net/docs.html)written by Texas Instruments
 type of document : PDF\
 source : [TI-99/4A Home Computer Page](http://www.99er.net/)
- title: SPEECH SYNTHESIZER MANUAL
url: http://www.99er.net/docs.html
cover: null
text: |-
[**SPEECH SYNTHESIZER MANUAL**](http://www.99er.net/docs.html)written by Texas Instruments
 type of document : PDF\
 source : [TI-99/4A Home Computer Page](http://www.99er.net/)
- title: DISK MEMORY SYSTEM MANUAL
url: http://www.99er.net/docs.html
cover: null
text: |-
[**DISK MEMORY SYSTEM MANUAL**](http://www.99er.net/docs.html)written by Texas Instruments
 compiled/archived by Rich at www.99er.net\
 type of document : Unknown\
 source : [TI-99/4A Home Computer Page](http://www.99er.net/)
- title: RS232 INTERFACE CARD MANUAL
url: http://www.99er.net/docs.html
cover: null
text: |-
[**RS232 INTERFACE CARD MANUAL**](http://www.99er.net/docs.html)written by Texas Instruments
 compiled/archived by Rich at www.99er.net\
 type of document : Unknown\
 source : [TI-99/4A Home Computer Page](http://www.99er.net/)
- title: DATA RECORDER MANUAL
url: http://www.99er.net/docs.html
cover: null
text: |-
[**DATA RECORDER MANUAL**](http://www.99er.net/docs.html)written by Texas Instruments
 compiled/archived by Rich at www.99er.net\
 type of document : PDF\
 source : [TI-99/4A Home Computer Page](http://www.99er.net/)
videos:
- title: TV commercial featuring Bill Cosby
url: https://www.youtube.com/watch?v=OhsgvW9P7tI
text: 'Length: 30 s'
comments:
- author: Andy (USA)
date: Wednesday 17th June 2015
text: The Myarc Geneve was not a "clone" of the 99/8. It used the same CPU, but absent were the Hex Bux interface, built-in speech, and the built-in USCD Pascal system. It also used a totally different operating system. People have compared it to the 99/8 but it''s in no way a "clone" of the 99/8.
- author: frank (us)
date: Monday 30th July 2012
text: http://montreal.kijiji.ca/c-acheter-et-vendre-ordinateurs-Texas-Instruments-Computer-99-8-W0QQAdIdZ400504807
- author: Stephen Boutillette
date: Tuesday 8th November 2011
text: Dan you are right. I knew a few members of the North Jersey TI Users club that had them. Myarc was based in Basking Ridge, NJ and it was called the Geneve. Some used the PE box or a PC case to hose the parts. I know that at least one was still in use in the late 1990s.
- author: Dan Cochran (Leesport, PA)
date: Friday 2nd September 2011
text: If I remember right, a company called Myarc produced a clone of this computer. I never saw one in person, but I saw ads for it in a TI-oriented magazine.
- author: Alice Myers (Washington)
date: Friday 7th July 2006
text: The codename for the 99/8 was indeed the Armadillo. My memory is that it was virtually ready for production when marketing studies determined that the price-point they would be able to be sold for was lower than the cost of making them. If I remember correctly, competitors were pricing so low that everybody was probably losing money with each computer sold. I suspect the mind-set was "the last company to run out of money will be the winner."
related:
- /museum/texas-instruments-ti-99-2
- /museum/texas-instruments-ti-99-4a
- /museum/texas-instruments-ti-99-4a-beige
oc_id: 268
source:
url: https://web.archive.org/web/20230606203013/http://www.old-computers.com/museum/computer.asp?c=268
date: '2023-06-06'
---
The 99/8 was intended as an upmarket companion to the [TI 99/4A](/museum/texas-instruments-ti-99-4a/) . Something like a small business computer. However, at TI they didn't think it would generate any income, so it was never released.
It has built-in features which were optional in the 4A : The speech synthesiser and the Pascal UCSD ROM card. It is a prototype computer and was never marketed.
---
Very interesting information from **CC Clarke**\
As a young electronic technician at TI, I labored in the "trenches" during the Home Computer Wars of the early eighties. It was brutal. Our 99/4A was technologically superior to the Comodore 64, but was marketed against the VIC 20 in price.\
The 99/8 (codenamed: **Roadrunner**) was supposed to remedy that situation. It was more advanced, cheaper to produce, (the bottom line was ALWAYs the decisive factor in corporate decision-making) and used the existing TI HexBus interface, touted as the emerging interface standard at TI.\
Unfortunately, TI got a very bloody nose when it voluntarily recalled thousands of 99/4A AC transformers due to a perceived fusing issue.
Thousands of 99/8s were built and warehoused (before being destroyed) after it was discovered they couldn't meet FCC EMI specs without expensive design changes.\
In 1982/83, TI was losing more money in their Lubbock Consumer Products Division than they could justify. and the 99/8's problems made it cheaper to bury than bring to market. A few escaped and are considered collector's items.