I'm having fun with my python disassembler (github: bsdphk/PyRevEng)
and a HP5370B image.
One of the things I have just discovered, is that the firmware has
support for an expansion ROM.
If you look at page 8-53 in the manual, it lists
"Err 3 Undefined Routine. For possible future use."
The code in question looks for a ROM at 0x4003 and gives Error 3,
if it is not there.
The current ROM space is from 0x6000-0x7fff, so there is at
least space for a doubling of the code in the HP5370B.
And there is an empty slot.
Imagine a board with EPROM + ARM chip w/USB interface...
HP5370B with built in allan-variance calculation, anyone ?
No, I don't have the time, but if I had...
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
[email protected] | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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