Mainboard 81-180

The 81-180 mainboard is used on the Kaypro 10 '83.

81-180 B

B ROMs

Monitor ROM No Label

Char ROM 81-187

81-180 C1

C1 ROMs

Monitor ROM 81-302

Char ROM 81-235 & 81-187

C1 Machines

79763 - MBN 15062
Loose - MBN ?420 (Sticker may be covering)

Some changes between 81-180 B and C1

The most significant changes between the boards includes:

• The movement of U72 from the middle bottom of the board to the right bottom
• U7 goes from being empty to unlabeled