Keyboard models
Note KSN means Keyboard Serial Number
SMK
| SMK Keyboard Z (Tactile) | Found in #2775 - KSN 028401404 | |
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| SMK Keyboard E (Tactile) | Found in #288536 - KSN 068406464 | |
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| SMK Keyboard C (Tactile) | Found in #8409 - KSN 10820673, #12275 - 11821370, #12654 - 12822711, #43168 - KSN 12824823 (Kaycomp Keyboard) | |
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Keytronic
| Keytronics Keyboard A65-02207-2O1D (Capacitive) |
Found in #3590 - KSN 05420, #4207 - KSN 50845, (8/82), #4222 - 50996 (8/82), #4223 - KSN 55080 (8/82), #7954 - KSN 44011 (10/82) | |
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Type A vs Type B Keyboard
On early machines (at least below #20,000) There exists two types of Keyboards. In an early article they are defined as Type A and B. It turns out that this is a key indicator of who manufactured the keyboard and if it is a tactile switch or foam and foil keyboard. SMK appears to have only made the type A keyboards with tactile switches in the early days. Keytronics made the Type B keyboards with a foam and foil keyboard that degrades over time.
From the November 1983 Issue of Radio Electronics
| Type A | Type B | |
| External View |
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| Internal Key View |
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| Board Appearance |
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| Parts |  |
Single piece |
