You may want to have a peek at the sync separator I built for my 9000-340. The
schematics are available over
at VintHp
I am also in the process of building a PS/2 and USB to HIL adapter:
http://www.dalton.ax/hpkbd/hil/
As for disks. This is one option: http://www.dalton.ax/hpdisk/ Ansgar's HPDr
We were cleaning the basement yesterday and I came across some Xerox stuff from
the 1980's. For the 860 there
are program listings and disk format documentation. For the 820 I have BIOS
listings and service manuals for
the monitor they used.
Ny company happened to work with RX here in Finland an
OK. As usual was the problem quite evident, once I understood it... I have two
A400 boards.
On that board I tested with I never took note of switch 8. It was unfortunately
set to OFF indicating that
there was backup power for memory. Thus the power lost flag was never set,
which caused the p
Yes. I tried Operas Aria and asked a bit about HP1000 A-series. I started by
asking the difference between
A900 and A400 and got a reply that was partly correct, then followed up with
some specific questions about the
A400 that I happen to know rather well. It insisted that it had only 32Mb and
Hi!
I have been mostly lurking here, but I have been designing a DRAM board for the
HP1000 A-Series, using a more
modern 72-pin SIMM. The A400 can adress 32Mb of parity ram so I use 17 bits on
a 64Mb SIMM. I have taken
inspiration from the original HP12103X boards and tried to keep away from
es
