HP 87: PLOT ROM B 00087-60929

[rprosperi]

(06-19-2018 06:35 PM)Michael Fehlhammer Wrote:  Thank you Bob, J-F and Martin!
@ Bob: I found Martin's System Inventory Tool and FDIO and will try to build a floppy disk with my old PC.
Following J-F's suggested procedure, I did a MEM dump with both the "strange" PLOT ROM B 00087-60929 and the "normal" Plotter Rom Rev. B.
In both cases the resulting byte sequence is exactly the same as the one J-F got from the emulator!
So we can be pretty sure that the plotter rom 00087-60929 is identical to 00087-15002. The reason for the existence of a separate order number has been well explained by Martin.

Michael,

Good news - you now know that it's a clone of the standard Plotter ROM

Bad news - now you can't sell it for as much, since it's now clear what it is...

But I suggest you get a copy of Martin's very useful utility working anyhow. It is quite helpful when you need to explore unknown ROMs and/or need to identify the keywords in a ROM.

Good luck!