1MA7-0166 (HP85) ROMS - Free

[cruff]

(08-09-2015 02:59 PM)Bruce Larrabee Wrote:  Hello - I have a bunch of chips marked 1MA7-0166. I believe they are upgrade ROMS for the HP85. Or something close to that.

Do you know any more about them? Does 0166 represent a revision of the 0066 ROM? If my aging eyes read them correctly, my 85B has the following ROMs installed on the system board, with one empty socket for another.

soldered: 1MA7-0060, 1MA7-0063, 1MA7-0066, 1MA7-0068
socketed: 1MA7-0087, 1MA7-0088, 1MA7-0096

The part numbers do not seem to correspond to the ROM select codes from what I can see. Also, the 85B service manual does not list the ROM part numbers on the logic board parts list, but the 85A manual does.