Reading HP series 80 ROMs

From: vassilip_at_dsl.cis.upenn.edu <(vassilip_at_dsl.cis.upenn.edu)>
Date: Sat Oct 19 16:36:02 2002

gil smith <gil_at_vauxelectronics.com> wrote:
>From: john_shadbolt_at_talk21.com
> > [...]I have performed the following on my HP-85, I assume this
> > will work on a 86/87/9915.
> >1. Determine the ROM number for the ROM. You may have this anyway (as
> >it is used for error messages). For example my guess for the HP 85 EMS
> >ROM is that it is 317 octal / 207 decimal (the same as for the HP 87
> >EMS ROM which I do have). To check run the command:
>
> >
> >MEM 60000:207,2

Actually, on the HP86 and HP87 the ROM-id is in *octal* so the correct
command (for these machines) would be:

   MEM 60000:317,2

Also, since the HP-8[67] have larger screens, the MEM command dumps memory
in multiples of 8 bytes. So the above command is equivalent to:

   MEM 60000:317,10

(the number of bytes is also in octal).

So much for compatibility between the various Series 80 models.

**vp
Received on Sat Oct 19 2002 - 16:36:02 BST