H89 CP/M hard-secored boot diskette

From: Tony Duell <ard_at_p850ug1.demon.co.uk>
Date: Fri Apr 4 18:39:35 2003

> Tony, if you have dumps of U516 and U517, would you mind making those
> available? Also, I have several revisions of each of these that I'd like to

Sure, I'll e-mail them to you...

> dump. How did you dump them? FWIW all of the boards I have have 444-66

The normal way. Open case, pull the chip, put it in the PROM programmer...

> (U517) and 444-83 (U516) and 444-61 (U550), except one spare, which is
> missing U517 and has U516=444-41 and U550=444-43.
> Dwight, Tony may have dumps of U518 (the MTR EPROM) as well, but if not, I

I do, it's MTR-90, probably the 40 track-only version, though.

Received on Fri Apr 04 2003 - 18:39:35 BST

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