Hi,
I recently acquired a pair of HP 2100A minicomputers locally for very
cheap. Don't think I could get much more local that a guy literally at the
end of my street. He bought them at an auction over ten years ago, never
powered them on, and left them in his garage since. They've likely never
be
Alright, thanks for all the helpful tips and information.
I guess what I'll do when disassembling it is note down every electrolytic,
and probably just throw them all into a Digikey order that I'm working on
for other repairs.
Probably will give reforming a try if it seems practical, but I assume
Well I'm hoping for the memory section that I can find at least one of the
4 core boards that works right away. I've got an 8k driver board I can swap
it so I could run the system on only a single core board if needed. I'd
probably write a short program to do a bunch of memory writes, reads, and
su
I've also got two additional boards in a bag that I haven't taken out yet
https://goo.gl/photos/D4quXT992Y6huQoAA . They're in there quite tightly,
but I did take a peek at some of the chips that I could see from the edge.
Couldn't read the part number, but they were Intel chips and almost looked
t
Another possibility could be self-modifying mode, something somewhere else
could be writing over this code once it's running. Though that would be
assuming it's in RAM. Though the code around these instructions seems
confusing. Looking at the values it almost looks like it's ASCII text and
not actu
resumable some other
constant data, or some delimiters related to the strings.
Hayden
On Wed, Jan 11, 2017 at 10:16 AM, Hayden Kroepfl
wrote:
> Another possibility could be self-modifying mode, something somewhere else
> could be writing over this code once it's running. Though that
.
>
> I'll have a closer look at DASMx's parameters when I get home, that's the
> freeware one but it seems to make a better job of it than the commercial
> version, though both the D8741A and ROM dumps produce the same unknown
> opcodes.
>
> If anyone knows
I had this just last weekend. No mail from the list starting early
morning on the 4th and didn't start getting new mail till the morning
of the 6th. During that time the website wasn't responding for me
either.
--
Hayden
On Tue, Nov 7, 2017 at 2:07 PM, Rob Jarratt via cctalk
wrote:
>
>
>> -O
