20 Sep
2012
20 Sep
'12
2:37 p.m.
-----Oorspronkelijk bericht-----
Van: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
Namens Tony Duell
Verzonden: donderdag 20 september 2012 19:32
Aan: cctalk at classiccmp.org
Onderwerp: Re: Wanted : Dunp of HP9820 Peripheral Control II module
after all
I only have the PC1 but, the Australian HP museum
seems to have one
http://www.hpmuseum.net/display_item.php?hw=133 .
Achim Burger knows how to dump the ROM contents without opening the
case, he
It must be possible to read out the ROMs without opening the mosdule, ,thats; what hte HP9800 does when it runs said
programs. In fact, the only
signal
you can find internally and not on the moduel
conencotr is the -V Vbb bias
supply
(there's a -12V rail on the conenctor and a
potential divider ins the
mdoule). The
module, as I am sure you're aware is just 4 of
those HP512*8 ROMs and the
potential divider.
enter
made some small programs to do this and copy the
contents through the
rs232 interface.
Such a program would ahve to be in machien code, and there's no way to machien code o nteh keyboard on any of these machines.
I guess he's got
something on tape or cards to do it. Eitehr that, or he grabs the data
from the M
and T registers when the machine does the power-on memory scan.
find),
but I
Maybe you can do something with this info.
I will contact Achim (do you have his address? it's remarkably hard to don;t hold out much hope. I suspect he'd like all
the ROM images for his
HP9800e emulator (said package includes PC1 for the HP9820 and DataComm 1
foe the HP9830) and I would have thought he'd already asked the Australian
Museum.
Incidentally, if you want to know what I want it for, no I am not running
an
emualtor. Or writing an emualtor. Take a look at the
talks on the Sunday
of the
HPCC conference this year :-)
-tony
Interesting, very interesting...
The address is on its way.
-Rik