TRS 80 ( Model Number: 26-01004) - 01 |
The Tandy TRS 80 model 1 was the first member of one of the most famous computer family. It was one of the first home computer and was launched at the same time as famous computers like the Apple II or the Commodore PET. It use a black & white TV set, made by RCA, without tuner as monitor. The earlier models use a poor basic called Basic Level 1 (the basic and the OS fits in the 4 KB ROM !). It was replaced later with the Basic Level 2 which needs a 12 KB ROM. To offset its poor characteristics, Tandy developed a device called Expansion Interface which brings a lot of new features : additional 16 or 32kb RAM, two tape unit connectors, a printer port, a floppy disk controller, a serial port and a real time clock. When it was connected to a floppy disk unit, the TRS 80 uses the TRS DOS operating system, it was pretty bugged and most of the TRS80 users prefered NEW DOS, it is an operating system done by a third-party company called Apparat. This OS was the real TRS 80 operating system. It was followed with the TRS 80 model II (business computer) and model III (the model III has almost the same characteristics as the model I). (www.old-computers.com) |
Manufacturer | Tandy Radio Shack | Name | TRS 80 |
Type | Homecomputer | Origine | USA |
Introduction Date | 1977 | End of production | ??? |
Built in Language | Basic Level 1 (4k ROM models); Basic Level II (12k ROM models) | Keyboard | Full-stroke keyboard, 53 Keys, optional numeric keypad |
CPU | Zilog Z80 | Speed | 1,77 Mhz |
Coprocessor | ??? | Amount of Ram | 4 kb / 16 kb depending on models (up to 48 kb) |
Vram | 1Kb | Rom | 4 kb (Basic Level 1) or 12kb (Basic Level 2) |
Text Modes | 32 x 16, 64 x 16 | Graphic Modes | 128 x 48 |
Colors | monochrom | Sound | None |
Size / Weight | ??? | Built in Media | None |
I/O Ports | Monitor, cassette interface, expansion port | OS | TRS DOS - NEW DOS |
Power Supply | External | Introduction Price | #26-1003: Model I, Level I, 16K = 700fr.(France,81); #26-1004: Model I, Level II, 4K = 640 fr.(France,81); #26-1006: Model I, Level II, 16K = $1099 |
Sold | ??? | Serial Number | 025561 |
Other Extras | None | Bought Where | Broechem |
Bought When | March 30, 2002 | Condition | Untested (No power supply) |
Price Paid | - | Specs of my Model | ??? |
Setup Today | ??? |
TRS 80-01: Bought via an ad on the internet (Broechem-Antwerp) on 30/03/2002 I paid 50 € for 5 C64 (2 boxed), a lot of magazines, books, lots of documentation, software, 2 C2N’s and a 1541 disk drive. I paid another 20 € for 3 TRS80-Model 1 and 2 ZX81 They came without power supply so I am unable to test them but maybe I’ll try the power supply of the coco2. |