Tandy / Radio Shack · 1977
TRS-80 Model I
Sold in Radio Shack stores and affectionately nicknamed the "Trash-80".
Then vs now
| Maker | Tandy / Radio Shack |
|---|---|
| Released | 1977 |
| Processor | Zilog Z80, 1.77 MHz |
| Memory | 4 KB |
| Storage | Cassette |
| Launch price | $599.95 (about $3,110 in 2024 dollars) |
| Big in | USA, UK, Australia |
Launch price is for the base model in its home market and is approximate. US prices adjusted with the US Consumer Price Index (BLS).
Own one again
Affiliate links: if you buy through them we may earn a commission, at no extra cost to you. Disclosure
Where people started on one
Nobody has added the TRS-80 Model I yet.
Was the TRS-80 Model I your first computer?
Add it to the atlas in 20 seconds. No sign-up, no email.
Add my first computerMemories of the TRS-80 Model I
No memories yet. Add yours and be the first.
Questions and answers
When did the TRS-80 Model I come out?
The TRS-80 Model I was released in 1977 by Tandy / Radio Shack.
How much did the TRS-80 Model I cost when it was new?
About $599.95 for the base model at launch, roughly $3,110 in 2024 US dollars after inflation (US Consumer Price Index).
How much memory and speed did the TRS-80 Model I have?
4 KB of memory and a Zilog Z80 processor at 1.77 MHz. A typical 2025 flagship phone has about 2.1 million times more memory.
How many people had the TRS-80 Model I as their first computer?
Nobody has added it to the First Computer Atlas yet. If it was yours, add it.
Where was the TRS-80 Model I popular?
It was especially popular in USA, UK, Australia.
Can you still buy the TRS-80 Model I?
Only second-hand. Working units turn up on eBay and at retro computing fairs; boxed, tested machines cost the most. Check sold listings rather than asking prices to judge what one is worth.