HP86 problem

[Paul Berger (Canada)]

(06-05-2020 12:48 PM)Alexkumt Wrote:  in my HP86 a 1MCB-0001 is mounted as controller, while normally 1MB2-001 is mounted.
What could be the differences?
Where can you find this component?

It seems to me that it was determined that the 1MCB-0001 is an equivalent part with possibly some minor changes to support national languages, a feature that was unique to the 86B. The picture of the board in your 86B that you posted previously clearly shows that it has the national language feature installed. Since these are custom chips designed for the Series 80 machines, at this point it is likely that the only source would be another machine.

Paul.