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Notes |
Manufacturer |
Processor Technology Corporation (US) |
|
Model |
Sol-20 |
|
Date Launched |
Late 1976 |
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Price |
$1649 as a kit or $2129 ready assembled, for the 'System II' which included 8 KB of RAM, a TV monitor and a cassette recorder. |
|
Microprocessor type |
Intel 8080 @ 2 MHz |
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ROM size |
1 kilobyte |
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Standard RAM |
Minimum 1 kilobyte. |
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Maximum RAM |
64 kilobytes total RAM + ROM + PROM. |
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Keyboard type |
Typewriter style with numeric pad |
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Supplied language |
None built-in but BASIC-5 was supplied on tape. |
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Text resolution |
64 x 16 characters |
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Graphics resolution |
None |
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Colours available |
Monochrome |
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Example Screenshot |
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Sound |
None |
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Cassette load speed |
1200 baud |
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Dimensions (mm) |
Not known |
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Special features |
The first self-contained desktop computer, with an integral keyboard and video display adaptor (suitable for modified TV, or video monitor), plus serial and parallel interfaces, as standard. |
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Good points |
Could be expanded via the five internal S-100 slots. |
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Bad points |
By the standards of 1976 the Sol-20 had few faults. Perhaps the main one was that because of the way the ROM and display were memory mapped, it could not have more than 48 KB of contiguous RAM and thus could not run most CP/M programs (which needed 64 KB of RAM.) |
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How successful? |
Around 10,000 were sold, a relatively large number for an early desktop computer. |
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Comments |
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