07-05-2022, 01:14 AM
(06-05-2022, 07:02 PM)Ashes Wrote: Is there possibly a way of working out the original configuration of a machine via the Serial Number? I have an idea that some of the Microbees I have are a little modified looking at the EPROMS in the core boards.Mostly no,
Many of the Microbee's came out of the factory with MOD's already fitted.
Your best starting place would be to find the board I'd's and revisions and get hold of the associated schematics from the Repository, but even that is only a rough starting point. You may then need to look at the Engineering Correction Notices (ECN's) and find which ones you may actually want to keep, many were critical improvements.
In the case of the Coreboard an owner may have added latter functionality to an early revision board to increase either RAM or ROM or both, I.E. PC85b from an original PC85 effectively doubling the number of PAK ROMs available.
Ernest