Mainboard 81-110: Difference between revisions
Jump to navigation
Jump to search
FrankRahman (talk | contribs) (Created page with "==81-110 General Info== The 81-110 Mainboard was the original Kaypro board and debuted with the first Kaypro II machines. It's design was based on the Ferguson Big Board. ([https://retrocmp.de/kaypro/kay-p2_hrdw.htm#mb-kII Thomas Brase]) It was exclusively used in the Kaypro II and for the most part was replaced by the 81-240 sometime in 1983. ==81-110A== The 81-110A is notable for 4 unpopulated chips locations from the Ferguson Big Board design (CTC, Monitor ROM, an...") |
(No difference)
|
Latest revision as of 12:55, 6 August 2025
81-110 General Info
The 81-110 Mainboard was the original Kaypro board and debuted with the first Kaypro II machines. It's design was based on the Ferguson Big Board. (Thomas Brase)
It was exclusively used in the Kaypro II and for the most part was replaced by the 81-240 sometime in 1983.
81-110A
The 81-110A is notable for 4 unpopulated chips locations from the Ferguson Big Board design (CTC, Monitor ROM, and 2 74LS chips).
|
|
|
|
81-110B
The B board in extremely rare. It apparently had some technical problems that required the rapid update to the B1 board. It's design allowed for the total chips used to be reduced from 83 (A board) to 72 (B board).
|
|
|
|
81-110B1
|
|
|
|
