TRS-80 Model 1
Donor: Alan Draves
Location: Williamsburg, VA
Tandy/Radio Shack's first PC. The Model 1 came with
4Kb RAM standard. The built in Basic, called Basic Level
1, was extremely limited. It had only 26 possible
variables, labelled A-Z of course, and one and only one
integer array variable, called A(). The monitor was
basically an RCA TV with the tuner removed. Storage was
on cassette tape. Most Model 1s were upgraded to 16Kb and
Level 2 Basic. Additional expandibility was gained
through the Expansion Interface. This fair sized box
connected to the back of the Model 1 via a short ribbon
cable. The monitor then sat on top of the Expansion
Interface. With an Expansion Interface, you could add
additional memory, control serial devices, use two tape
decks instead of just one, and control up to four floppy
This particular Model 1 has 16KB RAM, an Expansion
Interface, and three floppy drives. One floppy isn't
quite working and the monitor crackles like a bowl of
Rice Krispies, but the system works great otherwise.
There were a number of DOSs available for the TRS-80
family. Tandy/Radio Shack's TRSDOS was generally regarded
as being pretty crummy. Third-party DOSs were much more
usable. This particular Model 1 came to me with both
TRSDOS 2 and NewDos/80, one of the more popular
This particular Model 1 also came with a Pascal
compiler, a COBOL compiler, and loads of games. The games
are very good and very playable, especially considering
the limited graphics available.
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