Click Here to visit our Sponsor
The Latest News ! The History of Computing The Magazine Forums Collectors corner Have Fun there ! Buy books and goodies
  Click here to loginLogin Click here to print the pagePrinter ViewClick here to send a link to this page to a friendTell a FriendTell us what you think about this pageRate this PageMistake ? You have mr info ? Click here !Add Info     Search     Click here use the advanced search engine

NCR

Decision
Mate
V
Browse console museumBrowse pong museum









 

ZX Spectrum goodies !

see details
MSX Retro Gamer goodies !

see details
Amiga Workbench goodies !

see details
Pixel adventurer goodies !

see details
Commodore 64 goodies !

see details
MZ-700 goodies !

see details
Apple II goodies !

see details
Atari ST bee icon goodies !

see details
Camputers Lynx logo goodies !

see details
Oric Atmos goodies !

see details
Commodore VIC-20 goodies !

see details
Destroy all humanoids ! goodies !

see details
Amstrad CPC-464 goodies !

see details
I love my Oric-1 goodies !

see details
READY prompt goodies !

see details
Horace is not dead goodies !

see details
H.E.R.O. goodies !

see details
Atari ST bomb icons goodies !

see details
Back to the roots goodies !

see details
1kb memory only...sorry goodies !

see details
Odyssey 2 / Videopac sprites goodies !

see details
Space Invaders - Retro Gamer goodies !

see details
Commodore 64 boot screen goodies !

see details
www.old-computers.com logo goodies !

see details
Space Invaders goodies !

see details
Odyssey 2 / Videopac Select Game prompt goodies !

see details







T > TANDY RADIO SHACK  > TRS 80 MODEL III     


Tandy Radio Shack
TRS 80 MODEL III

The model 3 is generally regarded as the successor to the Model 1. Its two 5.25" floppy disk drives could convert model 1 disks.

Initially Radio Shack wanted to sell both the model 1 and 3 at the same time, but the FCC forced them to stop selling model 1. Is so they were discontinued because of the excessive radio noise that they put out.

However, the Model 3 wasn't FULLY compatible with the model 1. There were differences in ROM which meant some programs had to be converted, especially those machine language ones that made ROM calls.

______________________

Model III configurations, by Dave Thompson:
TRS-80 Model III was sold in multiple configurations.
No hardrive configurations included:
Model III with Level 1 ROM, 8k RAM sold for US$799. Model III with Level 2 ROM, 16k RAM sold for $999.
The first floppy drive cost $849, and could store 168k. The second drive was cheaper, and could store more. The price difference is due to the first one included the drive controller. The increased space on the second drive (189k) was due to the first drive must also contain some TRS-DOS (the operating system).


Brandt Daniels adds:
There was also a TRS-80 VideoTex Computer terminal in 1980.

Mark Fowler reports:
I worked for a company in 1982 that had integrated a 5MB, and later a 10MB hard disk into the TRS80 Model III. It was then programmed in FORTRAN-66 as a dedicated medical records system, to mimic the pegbook accounting system in use in the 1980's. We introduced green phosphor, and later amber phosphor display tubes. Some systems were used with a modem to do simple email-type applications, and to access various bulletin boards.

ShareThis


 

At school we had the model I and the TRS80 model III was my first own computer. I still have it and it is still working and I also have lots of original documentation and tons of floppies. As I bought it once in Germany it has an extremely rare feature: German keyboard layout! So I''m very proud to have it $-) Would be happy to share memories about this machine if you like: jvogel@vetphys.uzh.ch

          
Wednesday 20th August 2014
Johannes (Switzerland)

My parents bought me a TRS-80 Model III as a high school graduation present in 1981. That was a sweet machine at that time. Of course, I didn''t have floppy disks because those were too expensive. OTOH, I did have the new *triple speed* audio cassette that could load data at a zippy 1500 bits per second!

I quickly outgrew the 16K of RAM and upgraded first to 32K and then maxed out at 48K. I still have the machine, and I still have the Model III ROM Commented book that has the assembly source code for the L2 ROM.

Not seeking to sell...just posting for shared interest. :-)

          
Wednesday 4th June 2014
Scott (USA)

This was my first computer. I bought it used (or perhaps I should say that my mom bought it for me as I didn''t have money at the time (Sound familar??)) for $1000 used. Came with two caes of disk, bunch of Load-80 tapes and several books. That night I was up until 5:00 A.M.w when my mom made me go to bed. I woke up 3 hours later and was back on the machine. True, the graphics sucked even at the time, but the games were still fun. I also had fun BBSing (but for some reason it wasn''t fun when the phone bill came looking as thick as a phone book ...just kidding, but the bill was no laughing matter. Still, it was fun trying to get on that popular BBS that ALWAYS had a busy signal....*SIGH* I tell you kids have SO EASY now a days with the Internet. Able to listen to any song you want right away w/o having to call a radio station asking the DJ to put it on wondering f he/she would, never getting a busy signal when you want to go online. In a weird way it was fun trying to get on that populat BBS$ LOL

How many of you remember paying $40 for a box of ten 5 1/4" floppies at Radio Shack? That''s something I don''t miss!!! I do remember an Elephant floppy I had that I used to boot the system. I used that sucker for a year at least and that floppy NEVER gave me a gram of trouble.

          
Monday 23rd July 2012
Rob (California, USA)

 

NAME  TRS 80 MODEL III
MANUFACTURER  Tandy Radio Shack
TYPE  Home Computer
ORIGIN  U.S.A.
YEAR  1981
END OF PRODUCTION  Unknown
BUILT IN LANGUAGE  TRS-80 Level II BASIC
KEYBOARD  Full-stroke keyboard with separated numeric keypad
CPU  Zilog Z80 then Z80A
SPEED  2.03 MHz
RAM  16 KB (up to 48 KB)
ROM  14 KB
TEXT MODES  32 or 64 columns x 16 lines
GRAPHIC MODES  128 graphic characters
COLOrsc  monochrome
I/O PORTS  Tape (500 or 1500 bauds), Centronics, RS232
BUILT IN MEDIA  Zero, one or two 5.25'' disk-drives.
OS  TRS DOS (other OSes were available : New DOS, LDOS, MultiDOS, ...)
POWER SUPPLY  Built-in power supply unit
PERIPHERALS  Various Tandy peripherals
PRICE  No disk model : AU$1450 (Australia, 1981)
$2495 in 1984 for a complete system with 2x360 KB drives, TRSDOS, 64kb Ram, software and printer





Google
 
Web www.old-computersc.com


 

More pictures
Adverts
Hardware Info
Software & screenshots
Emulators
Internet Links
Documentations
3D models
Mini-Forum

Click here to go to the top of the page   
Contact us | members | about old-computers.com | donate old-systems | FAQ
OLD-COMPUTERS.COM is hosted by - NYI (New York Internet) -