yann64andClaude Opus 5.5
c913d792c4
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ
402 lines
24 KiB
Markdown
402 lines
24 KiB
Markdown
---
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title: Tandy Radio Shack TRS 80 MODEL III
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categories:
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- Computers
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types:
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- Home Computer
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origins:
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- U.S.A.
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years:
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- '1981'
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cpus:
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- Zilog Z80 then Z80A
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params:
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name: TRS 80 MODEL III
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image: /media/museum/photos/tandy_trs80-model3_1.jpg
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company: /companies/tandy-radio-shack
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company_name: Tandy Radio Shack
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specs:
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- label: NAME
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value: TRS 80 MODEL III
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- label: MANUFACTURER
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value: Tandy Radio Shack
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- label: TYPE
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value: Home Computer
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- label: ORIGIN
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value: U.S.A.
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- label: YEAR
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value: '1981'
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- label: END OF PRODUCTION
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value: Unknown
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- label: BUILT IN LANGUAGE
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value: TRS-80 Level II BASIC
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- label: KEYBOARD
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value: Full-stroke keyboard with separated numeric keypad
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- label: CPU
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value: Zilog Z80 then Z80A
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- label: SPEED
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value: 2.03 MHz
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- label: RAM
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value: 16 KB (up to 48 KB)
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- label: ROM
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value: 14 KB
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- label: TEXT MODES
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value: 32 or 64 columns x 16 lines
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- label: GRAPHIC MODES
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value: 128 graphic characters
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- label: COLORS
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value: monochrome
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- label: I/O PORTS
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value: Tape (500 or 1500 bauds), Centronics, RS232
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- label: BUILT IN MEDIA
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value: Zero, one or two 5.25'' disk-drives.
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- label: OS
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value: 'TRS DOS (other OSes were available : New DOS, LDOS, MultiDOS, ...)'
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- label: POWER SUPPLY
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value: Built-in power supply unit
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- label: PERIPHERALS
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value: Various Tandy peripherals
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- label: PRICE
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value: |-
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No disk model : AU$1450 (Australia, 1981)\
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$2495 in 1984 for a complete system with 2x360 KB drives, TRSDOS, 64kb Ram, software and printer
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tabs:
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- photos
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- adverts
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- hardware
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- software
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- emulators
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- links
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- docs
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photos:
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- title: REBADGED VERSION
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subtitle: ''
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text: |-
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A rebadged version sold by ADS Co. under the name DATAMAX.
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Thanks to **Jon Gilmore**
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image: /media/museum/photos/tandy_model3_adsclone_1.jpg
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- title: TYPING SCHOOL
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subtitle: ''
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text: In a few years traditional typewriters were replaced with computers. This revolution started around 1985. At the time, this school of the Pigier group was equiped with Tandy TRS80 models 1 and 3
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image: /media/museum/photos/tandy_trs80mod3_typingcourse_1.jpg
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adverts:
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- title: 'ISAAC ASIMOV AD #1'
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subtitle: ''
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text: This surprising advert is dated 1982.
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image: /media/museum/pubs/tandy_trs80-model3_pub_1.jpg
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- title: 'ISAAC ASIMOV AD #2'
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subtitle: ''
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text: |-
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Advert said:
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Our word processing system changed Isaac Asimov's mind about writing...\
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**"I may never use a typewriter again!"** Isaac likes the time he saves using SuperSCRIPSIT, our newest word processing program...
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image: /media/museum/pubs/tandy_model3_pub_2.jpg
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- title: US ADVERT APR. 1982
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subtitle: ''
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text: Courtesy of **[Attached](http://www.aci.com.pl/mwichary/)**
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image: /media/museum/pubs/tandy_model3_pub_s3.jpg
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- title: U.S. AD (1982)
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subtitle: ''
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text: ''
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image: /media/museum/pubs/tandy_model3_pub_1.jpg
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- title: FRENCH ADVERT (1982)
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subtitle: ''
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text: ''
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image: /media/museum/pubs/tandy_trs80-model3_dossier31.jpg
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- title: FRENCH ADVERT (JAN. 1982)
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subtitle: ''
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text: ''
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image: /media/museum/pubs/tandy_trs-80_model1_pub_avocats.jpg
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hardware:
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- title: REMOTE UNIT ACTIVE
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subtitle: Serial# 26-1210
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text: |-
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This rare unit is meant for teachers to control up to 16 TRS-80 Model 1 from a another TRS-80 equiped with min-disk. All the controled TRS-80 model 1 must be equiped with Level II.
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It cost 2895fr (France, 1981)
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image: /media/museum/hardware/tandy_trs80-m1_remote-unit-active.jpg
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- title: NETWORK II BOX
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subtitle: p/n 26-1211
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text: |-
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This box allowed up to 16 TRS computer to be networked. Three network boxes were released by Tandy (I, II and III).\
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The Network II required verbal communication between the server operator and the remote user, and data transfer had to be completed one user at a time.\
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The network III allowed automated control of the network so that users could easily access programs and data stored on the server's storage device.
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Thanks to **David Sutherland** for the pictures.
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image: /media/museum/hardware/tandy_network2_s1.jpg
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- title: DMP-200
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subtitle: ''
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text: 80-column, 100 cps dot matrix printer.
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image: /media/museum/hardware/tandy_model3_dmp200_s1.jpg
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- title: DAISY WHEEL PRINTER II
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subtitle: Serial# 26-1158
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text: |-
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This is a high-quality printer meant to be used with wordprocessors. Some interchangeable daisy-wheels were available (Courrier, Elite, Madeleine). It could print 163 characters per line (34cm), at a 43 cps rate.
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It cost 9595fr (France, 1981)
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image: /media/museum/hardware/tandy_trs80-m1_daisy-wheel-printer-2_1.jpg
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- title: LINE PRINTER I
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subtitle: Ref# 26-7017
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text: |-
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This printer was a custom version of the Oki Microline 80.\
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Printed lower and upper case on paper rolls or listing paper (24cm wide) from 40 to 80 columns/line, at a speed rate of 28 lines/minute.
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It cost 716 Euros in 1981 (France).
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image: /media/museum/hardware/tandy_model1_lineprinter1_s1.jpg
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- title: LINE PRINTER III
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subtitle: Serial# 26-1156
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text: This printer can print lower and upper case, at a speed rate of 120 c/s, on paper up to 38cm wide. It is conceived for intensive use ! It cost 9950fr in 1981 (France).
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image: /media/museum/hardware/tandy_trs80-m1_line-printer-3_1.jpg
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- title: LINE PRINTER VI
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subtitle: Serial# 26-1166
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text: |-
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This large printer can print lower and upper case, graphic characters and symbols at a speed rate of 100 c/s ! This is definately a professional printer.
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It cost 5495fr in 1981 (France).
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image: /media/museum/hardware/tandy_trs80-m1_line-printer-6_1.jpg
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- title: TP-10 THERMAL PRINTER
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subtitle: Box
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text: ''
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image: /media/museum/hardware/tandy_trs80_tp-10_thermal-printer_box.jpg
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- title: 15 MB HARD DISK UNIT
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subtitle: ''
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text: ''
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image: /media/museum/hardware/tandy_model3_15mbhddunit.jpg
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- title: EXATRON
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subtitle: Stringy Floppy drive
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text: |-
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The Exatron Stringy Floppy (ESF) was a low-cost data—storage system that fitted the gap, between cassettes and disk drives.\
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The system was based on a miniature endless—loop tape cartridge called a "wafer".\
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The amount of data that could be recorded on a wafer depended on the length of tape in it, typically, a 50—foot wafer could hold at least 40 KB of programs or data.
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**Matt** reports to us:\
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A curiousity about the model 1, CPU SPEED had a direct relatonship with STORAGE CAPACITY. if you doubled the clock speed of your MODEL 1 CPU you doubled the amount of data you could store on your stringy floppies. this is a feat that no other computer no matter how many ghz you have in your PC can do today without using compression.
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Thanks to **David Sutherland** for the pictures
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image: /media/museum/hardware/tandy_model3_exatronwafer_s1.jpg
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- title: EXATRON DRIVE FOR THE MODEL 3
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subtitle: ''
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text: Thanks to **www.turnkit.com/computers**
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image: /media/museum/hardware/tandy_model3_exatronwafer3_s1.jpg
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emulators:
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- title: David Keil's TRS-80 Model III/4/4P Emulator Page
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url: http://discover-net.net/~dmkeil/trs80/model4.htm
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platform: MS DOS
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text: This program emulates a complete TRS-80
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- title: Matthew Reed's TRS-80 Emulator Web Site
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url: http://www.arrowweb.com/mkr/
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platform: MS DOS
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text: This page offers shareware versions of a TRS-80 Model 4 emulator and a TRS-80 Model 1-2 emulator
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- title: TRS-80 Model III/4 Emulator
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url: http://www.vavasour.ca/jeff/trs80.html#model4
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platform: MS DOS
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text: This TRS-80 Model III/4 Emulator is a commercial product
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- title: 'xtrs: TRS-80 Model I/III/4 Emulator for Unix'
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url: http://www.tim-mann.org/xtrs.html
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platform: Unix / Linux
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text: xtrs is a Radio Shack TRS-80 Model I/III/4/4P emulator for Unix and the X Window System
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- title: 2nd life TRS 80 model III emulator
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url: http://www.users.zetnet.co.uk/atari_shack/emul8.htm
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platform: Atari
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text: TRS 80 model III emulator for Atari ST systems
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- title: TRS-80 Level I BASIC in a browser
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url: http://www.vavasour.ca/jeff/trs80.html#simulator
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platform: Other platform
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text: With this Java emulator, you'll be able to write a BASIC program directly in your browser!
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- title: Ira Goldklang's TRS-80 Revived Pages
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url: http://www.trs-80.com/trs80-e.htm
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platform: Multiplatform
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text: A complete list of TRS-80 emulators for various platforms !
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- title: MESS
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url: http://www.mess.org
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platform: Multiplatform
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text: MESS emulator also emulates a TRS-80 systems
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links:
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- title: 8bit-micro.com - Online TRS-80 Computer Magazine
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url: HTTP://WWW.8BIT-MICRO.COM
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text: Online Magazine dedicated to the TRS-80 and other Vintage - Monthly Issues
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- title: David's TRS-80 Page
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url: http://freespace.virgin.net/david.sampson/
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text: ''
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- title: Ira Goldklang's TRS-80 Revived Pages
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url: http://www.trs-80.com/
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text: Lof of infos about all TRS-80 computers
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- title: Java TRS-80 Model 1 BASIC Interpreter
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url: http://ganley.org/software/trs80.html
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text: ''
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- title: Mike's Personal Computer Museum
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url: http://personal.nbnet.nb.ca/mclays/trsmod1.html
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text: Level 1 & 2 Basic summaries, Tandy time-lines, price-list, etc ... !
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- title: RadioShackCatalogs.com
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url: http://www.RadioShackCatalogs.com
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text: Here, you can actually/virtually flip-through the pages to view the content of every RadioShack catalog!
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- title: The TRS-80 Home Page
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url: http://www.kjsl.com/trs80
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text: Full of infos
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- title: Tim Mann's TRS-80 Page
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url: http://www.tim-mann.org/trs80.html
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text: Infos, tools and home of xtrs, a Model I/III/4 emulator for Unix
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- title: Web Wiz CAPTCHA
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url: http://www.webwizcaptcha.com
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text: Discussion about Tandy computers
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docs:
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- title: TRS-80 MODEL III - OPERATION AND BASIC LANGUAGE OPERATION MANUAL
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url: null
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cover: /media/museum/docs/couvs/tandy_trs80model3_operation-and-basic-language-reference-manual.jpg
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text: |-
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**TRS-80 MODEL III - OPERATION AND BASIC LANGUAGE OPERATION MANUAL**\
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written by Radio Shack
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compiled/archived by Wade Fincher\
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type of document : PDF\
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size : 6 MB\
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source : [WinTRS80 homepage](http://asub.arknet.edu/wade/)
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- title: TRS-80 MODEL III - DISK SYSTEM OWNER'S MANUAL
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url: null
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cover: /media/museum/docs/couvs/tandy_trs80-model3_disk-system-operation-manual.jpg
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text: |-
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**TRS-80 MODEL III - DISK SYSTEM OWNER'S MANUAL**\
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written by Radio Shack
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compiled/archived by Wade Fincher\
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type of document : PDF\
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size : 18 MB\
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source : [WinTRS80 homepage](http://www2.asub.arknet.edu/wade/)
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- title: GRAPHICS BOARD MANUAL
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url: http://www2.asub.arknet.edu/wade/m3graphics.htm
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cover: /media/museum/docs/couvs/tandy_trs80-model3_graphics-board-manual.jpg
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text: |-
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[**GRAPHICS BOARD MANUAL**](http://www2.asub.arknet.edu/wade/m3graphics.htm)written by Radio Shack
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compiled/archived by Wade Fincher\
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type of document : PDF\
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source : [WinTRS80 homepage](http://www2.asub.arknet.edu/wade/)
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- title: DISK MODIFICATION KIT - SERVICE MANUAL
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url: http://www2.asub.arknet.edu/wade/m3diskinstall.htm
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cover: /media/museum/docs/couvs/tandy_trs80-model3_modification-kit.jpg
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text: |-
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[**DISK MODIFICATION KIT - SERVICE MANUAL**](http://www2.asub.arknet.edu/wade/m3diskinstall.htm)written by Radio Shack
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compiled/archived by Pete Bumgardner\
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type of document : PDF\
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source : [WinTRS80 homepage](http://www2.asub.arknet.edu/wade/)
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- title: MDX-6 DISK UPGRADE FOR MODEL III
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url: http://www2.asub.arknet.edu/wade/mdx6.htm
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cover: /media/museum/docs/couvs/tandy_trs80-model3_mdx6-upgrade.jpg
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text: |-
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[**MDX-6 DISK UPGRADE FOR MODEL III**](http://www2.asub.arknet.edu/wade/mdx6.htm)written by Micro-Design
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compiled/archived by Wade Fincher\
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type of document : PDF\
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source : [WinTRS80 homepage](http://www2.asub.arknet.edu/wade/)
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comments:
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- author: LaRoux King Gillespie (United States)
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date: Thursday 18th March 2021
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text: In the later years of TRS-80 Model III I bought a 5meg external hard drive. Then IBM PC came along and I switched to it. In Kansas City we had a Radio Shack Computer User forum that met once a month in the Olathe Kansas store to share stories of how to program and get things to work. It was a giant help for me. About 30 of us met there. Dad sold me the Mod III that he had just bought for $2500 in 1982/1983. I went without lunches for a year and half to pay for that. I gave a lecture to a wealthy women''s group on Ward Parkway in about 1984 or so and took my Mod III with me to demonstrate what a computer could do. I kept mentioning how useful the users group was. After 30 minutes a lady said, "Oh, you are not talking about a drug users group." It never occurred to me to explain what a computer users groups was.
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- author: LaRoux King Gillespie (United States)
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date: Thursday 18th March 2021
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text: I have some old radio shack programs. and Tandy tapes that could be read by Model III in my day. Who could I donate them to? Also I have several Basic program text books who to give to?
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- author: Chuck Rose (Vermont, USA)
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date: Friday 26th December 2014
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text: In 1983, I worked on one of these for a Radio Shack store that also rented VHS movie tapes. It was a 48k dual floppy machine with a printer attached. My mission was to write the BASIC software necessary to inventory and keep track of which movies were currently rented out. It also printed out the tapes that were available for a given month. I got this job because I had experience with Level II BASIC on the Model I machine. Great times! :)
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- author: Johannes (Switzerland)
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date: Wednesday 20th August 2014
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text: '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'
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- author: Scott (USA)
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date: Wednesday 4th June 2014
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text: |-
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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!
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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.
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Not seeking to sell...just posting for shared interest. :-)
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- author: Rob (California, USA)
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date: Monday 23rd July 2012
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text: |-
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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
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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.
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- author: Greg Brackett (United States)
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date: Tuesday 21st February 2012
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text: I have a TRS80 III and the wide printer. Purchased back in 1985. Last used about 1995. Has been stored in excellent condition. Lots of cables and misc. Several boxes of books, magazines and software for this computer. If someone is interested in them please contact me. flyrite777@juno.com
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- author: Greg Brackett (United States)
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date: Tuesday 21st February 2012
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text: I have a TRS80 III and the wide printer. Purchased back in 1985. Last used about 1995. Has been stored in excellent condition. Lots of cables and misc. Several boxes of books, magazines and software for this computer. If someone is interested in them please contact me. flyrite777@juno.com
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- author: Eric69 (Oullins / France)
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date: Tuesday 26th July 2011
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text: |-
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J''ai 2 ordinateurs à donner, TRS-80 Modèle III (64Ko, 2 flopy 5"1/4, + carte graphique) et TRS-80 Modèle IV (clavier accentué) , plus une imprimante daisyweel avec margueritte.\
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Le tout en parfait état.\
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Faire offre de rachat au prix des frais de port, ou venir chercher en france. Tel 0336 23 86 38 45. 033478 21 42 14\
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Urgent avant le 15 Aout 2011, date de destruction. Me contacter pour se mettre d''accord.
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- author: Dan Harvell (Spring Lake, MI)
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date: Sunday 23rd January 2011
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text: '@PAUL (FROM MICHIGAN) - I just left a job as "Computer Operator" that still prints reports off a line printer on good ol'''' greenbar paper. Stepping into that office is like stepping in a time machine! But, on topic, my experience with the TRS-80 Model III was in the 5th grade. My 5th grade teacher predicted that we would be looking up information on our computers, rather than libraries, by the time my 5th grade class was in college. We laughed at him, back then. He was right on the money.'
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- author: Kenneth (Iowa )
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date: Wednesday 10th February 2010
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text: This was my first computer and I remember typing in code so I could play games. My dad still has this. Any idea if it is worth anything today?
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- author: Francis Darmanin (Malta)
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date: Friday 24th October 2008
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text: I purchase a new TRS 80 Mod III at the beginning of the 80''s. This came with 48K of RAM and two floppy 5.1/4" drives. I had it sent over from UK. At the time I was very interested in Amateor radio just having obtained my Ham license. I learned to program in basic using the manual supplied with the machine and this was the basis of my working in the IT field. I also purchases a unit called Terminall which I could use with my TRS 80 and Transciever to send and receive RTTY (radio teletype). Radio teletype was the old type telex. At the time machines still used punched tape to send messages but the TRS 80 with Terminall did it using software. I still have the machine sitting covered in my garage. Hopefully someone will decide to open a computer museum and it will find its righfull place there.
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- author: Paul (Royal Oak, Michigan, USA)
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date: Tuesday 9th January 2007
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text: Back in 1984, my freshman year of highschool, our computer classes consisted of puchcards for FORTRAN programming and the good old "Trash-80" model III for BASIC and COBOL programming. I still remember the day I discovered the "dir" command and ran every single DOS command listed, up to and including format... which formatted the system drive for the network and killedeveryones projects. Live and learn. Oh, the days of 360K 5 1/4" disks and green-bar printouts.
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- author: Mary (indiana usa)
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date: Monday 27th November 2006
|
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text: Hey there just got one today from a computer recycle place for free. ummm but how do turn this thing on! :) i used the switch next to the keyboard but the screen is blank......is it damaged? or is there a seprate switch for the screen? it has two disk drives.
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- author: Jon N. (Los Angeles, CA)
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date: Wednesday 10th May 2006
|
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text: This was my second computer. I had the Model I, and with the FCC interference regulations that shut down the Model I, I was able to trade in my Model I on a new Model III. Al of the software that I had for both computers went with this model when I sold it.
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- author: Patrick Monks (USA)
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date: Saturday 11th February 2006
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text: One of the "New and Improved" features was placing the "Reset" button right next to the number pad so that anyone could hit it while you were working on it! Many of us who sold these taped our business cards OVER that recessed button. On the other hand, unlike the model 1, you did not have to reach around the back to press the reset button. A very common and necessary function.
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- author: Tim Alosi (Massachusetts)
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||
date: Friday 2nd December 2005
|
||
text: This was also my first computer. 48K of ram, floppy drive, and tape drive. .NET web services are a long way from the basic programs I used to write.
|
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- author: David Remacle (Belgium)
|
||
date: Tuesday 13rd January 2004
|
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text: Tandy TRS-80 was my first vision of the Computers. I Start learn Basic Language ont that computer.
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- author: J. Michael Butler (Earth)
|
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date: Friday 5th April 2002
|
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text: Cut my teeth on this one. It had 64k of memory, but only 48K was addressable. Rest was ROM. Mine came with one floppy. I remember adding the second one myself - instant computer technician. I also remember using a hole punch to create "flippies" - The drives were single sided. If you bought double sided diskettes, you could notch the other side and punch a couple of holes on either side of the case for the timing hole and - voila - you could flip the diskette and use the other side! Ah, the good 'ole days...
|
||
related:
|
||
- /museum/radionic-model-r1001
|
||
- /museum/sysdata-eletronica-jr
|
||
- /museum/tandy-radio-shack-trs-80-model-12
|
||
- /museum/tandy-radio-shack-trs-80-model-16
|
||
- /museum/tandy-radio-shack-trs-80-model-4
|
||
- /museum/tandy-radio-shack-trs-80-model-4p
|
||
- /museum/tandy-radio-shack-trs-80-model-i
|
||
- /museum/tandy-radio-shack-trs-80-model-ii
|
||
software:
|
||
- /software/attack-force
|
||
- /software/super-nova
|
||
- /software/typing-tutor
|
||
oc_id: 18
|
||
source:
|
||
url: https://web.archive.org/web/20230129160404/http://www.old-computers.com/museum/computer.asp?c=18
|
||
date: '2023-01-29'
|
||
---
|
||
|
||
The model 3 is generally regarded as the successor to the [Model 1](/museum/tandy-radio-shack-trs-80-model-i/). 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**:\
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||
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.\
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||
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.
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