Mainboard 81-240
81-240 General Info
The 81-240 Mainboard was used for both the Kaypro II '83 and Kaypro 4 '83 machines. According to reports it detected if it was reading a single or double sided drive and would continue to function based on that data.
The previous board for the Kaypro II was the 81-110.
The universal board would replace it for the K2 '84 and K4 '84.
81-240A Machines
| Serial Num | Board Num | QC Sticker | Monitor ROM | Char ROM | Notes |
|---|---|---|---|---|---|
| #16679 | 30484 | none | 81-232 | 81-146 | Likely a FrankenKaypro due to multiple parts from multiple eras. |
| #17083 | 53883 | M-681? | 81-232 | 81-146 | FrankenKaypro? |