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Notes |
Manufacturer |
Tandy Radio Shack (US) |
Model |
TRS-80 Model I |
Date Launched |
August 1977 |
Price |
£300 approx. without monitor |
Microprocessor type |
Zilog Z80A @ 1.77 MHz |
ROM size |
4 kilobytes (original Level I) |
Standard RAM |
4 kilobytes initially |
Maximum RAM |
16 kilobytes internally |
Keyboard type |
Typewriter style |
Supplied language |
Tiny integer-only BASIC in Level I |
Text resolution |
32 x 16 or 64 x 16 characters |
Graphics resolution |
128 x 48 pixels |
Colours available |
Monochrome |
Example Screenshot |
|
Sound |
None |
Cassette load speed |
250 baud |
Dimensions (mm) |
400 x 190 x 76 |
Special features |
A matching monitor (actually an RCA television without a tuner) and disc drives were available. |
Good points |
Adequate specification for 1977. |
Bad points |
Level I BASIC was very limited and only had three error messages (WHAT?, HOW? and SORRY). |
How successful? |
A very popular early computer, including in small businesses and schools in the US, selling over 250,000 and perhaps close to 1 million units. |
Comments |
The first of the low-cost home computers, the TRS-80 had a large following in the US and was quite popular in the UK. |
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