website/content/museum/tandy-radio-shack-trs-80-model-100-102.md

title, categories, types, origins, years, cpus, params

title	categories	types	origins	years	cpus	params
Tandy Radio Shack TRS-80 Model 100 / 102	Computers	Home Computer	U.S.A.	1983	Intel 80c85	name company company_name specs tabs photos adverts hardware screenshots links docs comments oc_id source TRS-80 Model 100 / 102 /companies/tandy-radio-shack Tandy Radio Shack label value NAME TRS-80 Model 100 / 102 label value MANUFACTURER Tandy Radio Shack label value TYPE Home Computer label value ORIGIN U.S.A. label value YEAR 1983 label value BUILT IN LANGUAGE Enhanced version of Microsoft BASIC label value KEYBOARD Full-size typewriter style keyboard\ 8 function keys label value CPU Intel 80c85 (code and pin compatible with 8085) label value SPEED 3 MHz label value RAM 8 kb, up to 32 KB (29638 bytes free)\ by incremental 8 kb RAM pack on PCB label value ROM 32 kb (up to 64 kb) label value TEXT MODES 40 x 8 (LCD screen) label value GRAPHIC MODES 240 x 64 (Full-Dot matrix) label value COLORS monochrome label value SOUND Beeper label value SIZE / WEIGHT 30 (w) x 21.5 (D) x 4.5 (H) cm. label value I/O PORTS Centronics\ Tape\ Bar Code\ RS232\ Phone\ System Bus label value BUILT IN MEDIA User RAM battery backup label value POWER SUPPLY 6v DC - 1.1 w or 4 x AA alkaline-manganese batteries label value PERIPHERALS Disk-drive\ Printer\ Acoustic modem label value PRICE $799 - £499 photos adverts hardware software links docs title subtitle text image TANDY MODEL 100 null title subtitle text image MODEL 100 null title subtitle text image MODEL 102 Notice some differences in arrangement of the function keys with model 100. null title subtitle text image MODEL 100 (BOTTOM) null title subtitle text image 100-102 LABELS null title subtitle text image REAR CONNECTORS The main difference between two versions is the System Bus connector that is featured only on the 102 version. **(1)** Modem DB9 connector and switches\ **(2)** Tape recorder DIN plug\ **(3)** Phone line DIN plug\ **(4)** Parallel printer 26 pin connector - Tandy specific\ **(5)** Battery backup On/Off switch\ **(6)** Expansion Bus 40 pin connector - Only featured on 102 version\ **(7)** RS232 DB25 commector\ **(8)** Reset switch null title subtitle text image DISPLAY CLOSE-UP null title subtitle text image SCREENSHOTS **Top**: When the computer is switched on, one can select one of five software available in ROM. **Bottom**: 225 characters are available in ROM, including international accent letters and graphic characters. null title subtitle text image TANDY LEATHER CASE null title subtitle text image MODEL 100 BOX null title subtitle text image MODEL 102 BOX null title subtitle text image SAME HARDWARE BASE Like Philips which sells in Europe a part of its products range under Radiola or Schneider brands names, or Sharp pocket computers, also sold under Tandy name with minor design changes, these three computers (<$475$>Olivetti M10, <$334$>NEC 8201, <$233$>Tandy Mod. 100)are, in fact the same model, manufactured by Kyocera company. If hardware part is basically the same, external design may differ. Olivetti propose a tilting display, Nec adds arrows keys, etc. Major purpose of this partnership is to reduce study and manufacturing costs. The same model, designed and manufactured by a single company should be 25% more expensive. null title subtitle text image MODEL 100 MANUAL null title subtitle text image MODEL 102 MAINBOARD **(1)** External power supply jack. Power is supplied by a 6V AC adaptor\ **(2)** Serial RS232 DB25 connector\ **(3)** Reset switch\ **(4)** Keyboard connector\ **(5)** 40-pin system bus connector\ **(6)** User RAM battery backup and switch\ **(7)** Printer 26-pin connector - Tandy specific\ **(8)** Phone DIN plug\ **(9)** Tape recorder DIN plug\ **(10)** Modem DB9 conector and switches\ **(11)** Optional software ROM socket\ **(12)** 32 KB RAM chips\ **(13)** Basic language and buit-in software ROM - (c) Microsoft\ **(14)** 8085 processor - Here an OKI version\ **(15)** 8155 I/O chip\ **(16)** Universal Asynchronous Receiver Transmitter (UART) CDP 6402 chip\ **(17)** Beeper\ **(18)** Power switch\ **(19)** Display contrast adjustment null title subtitle text image MODEL 100 MAINBOARD **(1)** Cassette, Phone, Printer, Serial connectors and Reset switch. Notice that there is no bus connector in Model 100\ **(2)** LCD display connector\ **(3)** Internal batteries and external power supply connectors\ **(4)** Keyboard connectors\ **(5)** Basic interpreter and built-in software ROM\ **(6)** 8085 processor, 6402 UART and 8155 I/O chips\ **(7)** Each 4 KB module is composed of 2 x 6117 chips (2K x 8 bits)\ **(8)** Hitachi 6264 8 KB chip\ **(9)** Modem DB9 connector and switches null title subtitle text image CLOSE-UP RAM memory chips null title subtitle text image MODEL 100 CONNECTED TO A MAC This Model 100 is connected to a Mac thanks to a MacDOS II kit. null title subtitle text image MODEL 100 CONNECTED TO A PC This Model 100 is connected to a PC thanks to a LapDOS II kit. null title subtitle text image U.S. AD. JUNE 1983 First advert of the Model 100. null title subtitle text image SUITCASE Tape-recorder + computer + acoustic coupler null title subtitle text image PORTABLE DISK-DRIVE This is a 3''1/2 diskdrive for TRS-80 Model 100/102 and 200. It has a capacity of 100 kb formated. It can run on 4 AA batteries or a 6 volt adapter. null title subtitle text image 3.5'' DISK-DRIVE UNIT This unit is connected to the serial port of the computer\ Run with batteries or AC adaptor. null title subtitle text image FIRST LAPTOP 300-BAUD MODEM Laptop Compters Talk on the Phone Line!!!!! Back in 1985 Scott Stogel of California developed a 300 baud modem used in the very first laptops such as the Tandy 100 and NEC 8201 (and even the original Kyocera 85).\ This modem was essentially the first laptop modem and soon morphed into Touchbase series of the battery powered "portable modems". Over 5 years brand names included Technigroup, TravelComm 1200, WorldPort 1200, 2400, 9600 were produced.\ The value became clear as reporters traveling worldwide who began to 'transmit' their text stories to their home offices.\ It is said that a TravelComm 1200 modem even ended up on an early NASA space shuttle. I used mine to connect to BBS's (pre-internet newgroups) Prices ranged from $129 to over $700 for this modems... most about the size of a package of cigarettes.\ By 1992, TouchBase Systems was sold to U.S. Robotics and the product line lived on for several more years....\ Touchbase staff continued on in the computer business... laptop modems to connect on the phone line became standard... then the internet happened .... Thanks to John, a former owner of the original 3oo baud and TravelComm null title subtitle text image ACOUSTIC COUPLER null title subtitle text image BARCODE READER null title subtitle text image 8K RAM UPGRADE null title subtitle text image BOOSTER PAK The Booster Pak is snapped onto the bottom of the Tandy 100/102. It features: - 136k of RAM memory (96k available for files)\ - 64k of ROM software\ - 16 socketed slots for 32k RAM and/or ROM software chips\ - 2 Tandy MOLEX ROM sockets\ - Provision for a built-in Nicad battery pack\ - Provision for a built-in 1200 baud Hayes compatible modem\ - Continuous RAM software built-in (no bank switching or copying)\ - File folders/subdirectories supported\ - TS-DOS disk software built-in\ - X-TEL communications software built-in\ - TELCOM supports file upload/downloading to Booster Pak\ - Long life lithium battery for RAM backup (rated 7 years)\ - BASIC access programming to virtual RAM\ - ROM environment software (mix and match any ROM software)\ - ROM software applications from 32-480k in size\ - Fast action Asteroids game (with great graphics) built-in The perfect add-on ! null title subtitle text image BOOSTER PAK Inside null title subtitle text image 8 ROM EXPANSION PACK With this addon you can add up to 256k of ROM software to the Tandy or NEC laptop. This slim-design 8-chip ROM pack is approximately 1/2 inch thick and 2.5" wide. Attaches directly under the model 100, 102, 200 or NEC 8201/8300. Only one connection is required to the existing ROM socket. Switching from one ROM software to another is done all by software. This expansion pack was sold with TS-DOS ROMs and Sardine as an option. Sardine package includes: T-Word word processor, Sardine proof reader / spelling checker and the Random House American dictionary. 8-ROM Expansion pack with Sardine Plus & TS-DOS = $299 (1988, USA)\ 8-ROM Expansion pack with TS-DOS only = $169.95 (1988, USA) null title subtitle text image COMPLETE SYSTEM ! This is a Model 100 with most of its peripherals : - the DVI (Disk Video Interface)\ - a serial 5''1/4 floppy drive (right)\ - a thermal printer\ - a 3''1/2 5 serial floppy drive (on top of the DVI)\ - a barcode reader (on top of the 3''1/2 disk-drive) The DVI is an excellent device which adds a 5''1/4 floppy-drive and enables to use a monitor as the main screen (40/80 x 24) ! null title subtitle text image DISK VIDEO INTERFACE from Tandy The DVI is an excellent device which adds a 5''1/4 floppy-drive and enables to use a monitor as the main screen (40/80 x 24) ! null title subtitle text image TALK TO PCS OR MACS ...used to connect a Tandy Model 100/102/200 (or NEC 8201/8300) to PCs or Macs. null title subtitle text image CLOSE-UP A complete full-featured ROM-based application package for Model 100, 102, and NEC8201 owners. ROM includes T-WORD (full featured word-processing and print formatting- includes chain-printing from disk), T-BASE (relational database with mail merge to T-WORD), IDEA! (a thought organizer and outliner), and VIEW80 (see up to 60 char/line in T-WORD, T-BASE, BASIC and TELCOM). Includes auto-loaders for disk-based TS-DOS and Sardine programming. null title subtitle text image MODEL 100 STARTUP SCREEN This is the startup screen of a 24 kb Model 100. null title subtitle text image MAIN SCREEN This is the main screen with the built-in applications listed. It's an upgraded computer with 32 kb RAM. null title subtitle text image ULTIMATE ROM The Ultimate ROM, from Traveling Software, was a very useful tool for professional users.\ When inserted in the optional ROM socket and called by CALL 63013,0 from BASIC, it offered:\ **T-WORD** A full-featured word processor allowing professional looking text to be printed to any kind of parallel or serial printers.\ **T-BASE** A professional database and reporting tool that could be configured for any kind of requirements. null title subtitle text image LAPDOS / MACDOS LapDos II and MacDos II was special versions of LapLink allowing a connection between an PC or MAC and the Tandy portable disk drive trough a serial communication at speeds up to 19200 bauds. Thanks to Jonathan Sturm null title url text Club 100 - by Raymond Walden http://www.club100.org/index.html Loads of stuff including many programs for your Tandy portable computer ! title url text San Francisco Chronicle http://www.sfgate.com/cgi-bin/article.cgi?file=/chronicle/archive/2001/07/22/BU160803.DTL San Francisco Chronicle article about the Tandy 100 title url text Tandy laptops forum http://www.tandy102.bravehost.com/ Posts and chat around Tandy 100, 102, 200 systems title url text The TRS-80 Model 100 News http://209.196.30.88/servlet/Pt1?+TRS-80^Model^100 title url text Web Wiz CAPTCHA http://www.webwizcaptcha.com Discussion about Tandy computers title url cover text TANDY 102 - OWNER'S MANUAL http://www.club100.org/library/libdoc.html null [**TANDY 102 - OWNER'S MANUAL**](http://www.club100.org/library/libdoc.html)written by Tandy Corporation  compiled/archived by Charles Good\  type of document : PDF\  source : [www.club100.org](http://www.club100.org) title url cover text TANDY 102 - TECHNICAL REFERENCE MANUAL http://www.club100.org/library/libdoc.html null [**TANDY 102 - TECHNICAL REFERENCE MANUAL**](http://www.club100.org/library/libdoc.html)written by Tandy Corporation  compiled/archived by Charles Good\  type of document : PDF\  source : [www.club100.org](http://www.club100.org) title url cover text TANDY 100 - QUICK REFERENCE CARD http://www.club100.org/library/libdoc.html null [**TANDY 100 - QUICK REFERENCE CARD**](http://www.club100.org/library/libdoc.html)written by Tandy Corporation  compiled/archived by Charles Good\  type of document : PDF\  source : [www.club100.org](http://www.club100.org) title url cover text TANDY 100 - SERVICE MANUAL http://www.club100.org/library/libdoc.html null [**TANDY 100 - SERVICE MANUAL**](http://www.club100.org/library/libdoc.html)written by Tandy Corporation  compiled/archived by Charles Good\  type of document : PDF\  source : [www.club100.org](http://www.club100.org) title url cover text TANDY 100 - TECHNICAL REFERENCE MANUAL http://www.club100.org/library/libdoc.html null [**TANDY 100 - TECHNICAL REFERENCE MANUAL**](http://www.club100.org/library/libdoc.html)written by Tandy Corporation  compiled/archived by Charles Good\  type of document : PDF\  source : [www.club100.org](http://www.club100.org) author date text Jim Newton (USA) Friday 17th December 2010 In 1983, I was a journalist working for a news service in Atlanta when Radio Shack came out with the model 100. Since I was the bureau chief, I bought one for our staff (mostly me) to use. It only had an 8-line monochrome screen and 16k memory, but the model 100 served me well until Tandy came out with the model 200 in about 1985. It had 32k memory and a 16-line screen (40 characters per line) with the screen on a hinged top that folded down over the keyboard like today''s laptops. The model 100 was more like today''s notebooks. I would take the Model 100 (and later the 200) to meetings, write my story from the meeting site, find a phone, hook up my portable modem with an RS232 cable, and transmit my copy back to the modem on the office typesetting equipment. It sure beat calling the story in and dictating it by phone to a colleague. Plus, I could cover the news at night and have the story waiting in the office when I went to work the next mornning, and it was in the memory of the typesetting unit. What a technological revolution the Model 100 was for workikng journalists. I loved it. I liked the model 200 so much that I bought one personally, and still have it in my closet. I even bought a Radio Shack printer and a floppy disc drive for storage of stories I had written, and still have the disc drive for it. Both the model 100 and 200 were workhorse equipment for journalists in the 1980s. Glad to read about other journalists who loved this little machine. It changed my life. $ Jim Newton, retired journalist, Clinton, Ms author date text Mark Wigginton (USA) Tuesday 21st April 2020 As a reporter in Los Angeles I used the model 100 to cover both the Emmy''s and Oscars, using the phone cups to transmit the story back to the newspaper. It was magic. author date text Phil Cantor (United States) Sunday 23rd July 2017 I used one of these during my junior year of college in 1984. I was doing an internship at NIH in Washington DC and used this to write papers and communicate with my friends back in Iowa... racking up big phone bills using the modem to tie into the mainframe. My roommate created a huge poster of an orca using ASCII which he then printed using a dot matrix printer in his lab. It was a lot of fun... my first laptop. author date text Fynn Sunday 5th March 2017 VirtualT Is The Only Emulator author date text Chulang Searales (Barbados West Indies) Sunday 16th January 2011 I have a T100 now. the 3.6V memory battery has leak. I have to replace that as well as the contrast knob. It willl be fun getting it back up and working author date text Marty (Woodstock, IL USA) Thursday 24th June 2010 I was cleaing out the closet and found my Model 100. I turned it on and it still works and ther date time was within an hour. I had forgot I still had it. I have had it since 1980. If the batteries weren''t dead in 10 years Maybe I should use this in stead of buying an iPad. After seeing that otheres are still using their Model 100s I will learn how to live with only 24k of ram. I used to!\ I think it is time to change tos internal NiCad batteries first. 30 years is a little long for them. author date text webb (sydney australia) Saturday 15th September 2007 I have 2 tandy 102's and did not know they were even good for keeping the door open. But there are people out there still using them so i have a pair of 102's and they are in brandnew condition still in lether cases and both come in a wooden case aswell. author date text Josh Carlson (Alabama) Monday 23rd July 2007 I have had a model 100 for several years now. I LOVE the thing. It's impossible to break! It always works, there is not enough of a system there to crash and it sips battery power. Makes a great serial console for some of my old machines. Great system that is still *very* usable! author date text js (nowhere) Sunday 22nd July 2007 I once had a Kyocera Kyotronic 85, which was Kyocera's internal version. Didn't come with as much software as the 100/102 though. author date text thomas (alabama) Tuesday 10th April 2007 for the last 4 weeks i have been takeing notes with the model 100 it works great only problem is the sceen flikers every now and then but my teacher don't care and it has hellped my typeing i wish tandy still made computers,i am debateing on buying the TSR-80 model 3 yea for tandy author date text Chulang Searles (Barbados(West Indies)) Tuesday 15th August 2006 I had broughone in th eUK after using one here. It was a fantastic laptop. I hoope to find one soon. MInes had stop working author date text Mnem (Canada) Friday 16th December 2005 The printer port isn't percisley "Tandy proprietary" as stated on the connector diagram. You can actually plug the connector from a motherboard header plug for an AT style parrallel port backplate connector right into that port and then just plug a standard printer port into the other end. Only thing you have to figure out is how to set your printer to do a line feed on LF only instead of LF&CR as the Model 100 doesn't print out CR characters. This can usually be done by either holding down a combination of buttons on your printer whilst you turn it on to get into the settings mode, or via dip switches somewhere on the printer on most older printers. Check your printer manual to find the exact method. author date text Aaron (Indiana) Saturday 17th September 2005 I came across one of these a year or so ago. I would have loved to have kept it, but had no use for it and needed the money at the time. One interesting thing is the carrying case that i had. I didnt see it on the accessories page. It was a velvet (or some other very soft, fuzzy cloth) lined pleather bag with RadioShack Tandy Portable Computer stamped into the cover. Sadly, i have no high-resolution pictures of it, but i do have a picture you can view at http://img288.imageshack.us/img288/7316/img000022fc.jpg take a look if youre interested. author date text Andy (Manchester) Monday 21st March 2005 I have a Tandy 102 and an EPROM programmer on the PC. I've noticed a spare standard ROM socket inside the 102. Does anyone know of any links to sites containing ROM images? author date text Arthur Kaufman (UK) Friday 5th November 2004 I have two Tandy 200's and two 100's and use them as working machines, almost on a daily basis. I have also written an article on the Tandy 200. I did not know about your site until recently . These machines, apart from their obvious usefulness are great for touch typists, and unlike modern laptops, with the keys too close and the mouse in the way. Would like to know if there is anyone near Sheffield UK who still uses these machines.\ Looking forward to any replies... author date text Tom Morgan (Sacramento) Monday 12th April 2004 I worked for a company named System10 in San Jose and we used these computers for a budget priced UPS Manifest system in conjunction with our electronic postage scale and a printer. At the time we were one of three companies authorized to sell a UPS manifest system and these were popular due to the compact size. This was back in the early 80's. author date text Net Ranger (Orlando, FL) Tuesday 10th February 2004 For info on the model 100 and 102, check www.club100.org. you may also want to subscribe to the mailling list (check the site). A lot of people still use this machines and they can provide you with information. author date text Penni (Madison, WI) Thursday 5th February 2004 Looking for some help here, I have a Tandy 102 Digitgate manufactured for Radio Shack in 1988. Anyone out there have a clue a to what I am refering to? author date text M. Ayers (North Carolina) Thursday 6th November 2003 I wish I had known about this sight earlier. I just trashed 4 model 100's and 2 model 102's. We used to use them to collect behavior data, before lap tops. author date text grayfox (foxcom) Tuesday 28th January 2003 are there emulators for this computer yet\ if so let me know author date text Robert King (Georgia) Wednesday 30th October 2002 I have a Tandy 102 with an interesting accessory that I cannot figure out. It is a Datapac model 102/200 Ram Extension. I cannot figure how to use it. It also has a ROM chip in the chip slot titled EXECWS ver 08/04/87. It was used by a hospital at one time. 233 url date https://web.archive.org/web/20230605030605/http://www.old-computers.com/museum/computer.asp?c=233 2023-06-05

The Tandy 100 was actually a computer made in Japan by Kyocera. All the ROM programs were written by Microsoft, and even a few of them were written by Bill Gates (!) himself ! These programs include a text editor, a telecommunication program, which uses the built-in modem (300 baud), and a rather good version of BASIC (no big surprise there).

Kyocera made this computer for three main companies: Tandy, Olivetti (Olivetti M10) and NEC (PC 8201), these computers are the same except the case and some little differences in the programs and a few physical differences.

The operating system uses 3130 bytes of the 8 KB RAM. So the 8 KB models (Catalog # 26-3801) didn’t sell very well. But there was also a 24 kb model (Catalog # 26-3802), and one year later, Tandy replaced the Tandy 100 with the Tandy 102 (which has 24 kb RAM too), and later with the Tandy 200 (1985).

The Tandy 102 is 1/2 inch thinner and one pound weight different. The "Date-Bug" (random changing of the calendar) is also repaired from the Model 100. But many people still prefer the feel of the Model 100 as there are also more 100-only accessories on the used market than compatible accessories...

The CMOS CPU (80c85) allows to use the Tandy 100 for 20 hours with only 4 AA batteries (5 days at 4 hours/day or 20 days at 1 hour/day)!! The model 100/102 is still considered and used as an excellent machine, mainly to type texts when you're on the move (you can transfer them to modern computers) and even to send and receive emails !

Fun fact : its CPU was also used on the Mars Pathfinder probe's Sojourner rover !