Hello.
I have an image file of an DEC RX02 diskette obtained with Catweasel (.DMK).
I would use this image on SIMH, but I have no clue about the way to
convert it to SIMH format.
Any idea?
Thanks
Andrea
Hiya Folks,
First off, Merry Christmas and a Happy and healthy New Year to everyone
here!
I've been working with a couple of developers during the last few months
to get 3 of my HP PA-RISC boxes back up and running with Debian HPPA
Linux. Debian dropped support for hppa a few years ago, due to lack of
certified developers (DD's), but a few die-hards managed to keep it
going outside of the normal repositories at http://www/parisc-linux.org
. We would really like to see the port listed as an active architecture
again in the Debian repos, but in order to do so, they require at least
5 *active* developers to maintain the port.
Thanks to Helge Deller (Germany), John David Anglin (Canada), and a few
custom kernel re-writes, we now have a stable 32 & 64 Bit SMP kernel
(currently at 3.11-1 'unstable' and 3.11.2 'experimental'), and we have
3 buildd servers running on 2 different machines (at my location),
generating up-to-date packages for download at
http://www.debian-ports.org . Dave Anglin is currently working on
setting up another buildd on one of his machines to balance the load out
a bit. :)
Bottom line is, people can now 'debootstrap' new installs on their
hardware with a basic 'lifimage' CD available for download at:
http://ftp.parisc-linux.org/debian-ports/unstable-boot-image/lifimage
and a network connection, to pull the necessary packages from
debian-ports.org.
We are in desperate need of additional developers familiar with working
with the older HP PA-RISC hardware, and know something about coding for
this architecture in Linux, and especially somebody that may know a bit
about back-engineering some of the HP graphics cards to support Xorg and
a regular GUI desktop. As it stands, we only have graphics support for
the rare, and usually expensive, ATI FireGL-UX PCI-X type cards, and
it's still a bit buggy.
So dig out your old HP RISC boxes and dust them off, and see if you can
get them loaded up and running, and more importantly, if you're
interested in having an up-to-date Linux distribution that actually
makes these bullet-proof servers and workstations usable again, contact
me off-list and I'll get you connected with Dave Anglin and/or Helge
Deller, two of the main forces in this project at the moment, and they
can get you pointed in the right direction, if you're up for some
development work!
You can see a bit of our current progress (mainly with my original
Visualize J6750 workstation), and two (new to me) machines that were
donated by a former developer in the project, in my website hosted on
the J6750 along with 2 of the buildd servers, a full, *current*, LAMP
server to handle the website, and numerous other little projects, all
running on 2 - 875mhz. PA-RISC processors and 7 gb. or so of RAM. You
can see that here: http://www.landcomp.net:884/wp/ along with my newly
acquired RP-2470 (A500) server, and another J6000 series workstation.
We're still deciding what kind of tricks we want to make it do, so it's
offline at the moment, but ready to go, for graphics development or
whatever. :)
Happy Holidays, and we hope to hear from you soon! :)
Dave L.
--
Dave Land
Land Computer Service xmechanic at landcomp.net
ICQ: 676030523
If you live in the Denver area, there is a recycler that has lots of old
Apple/Mac stuff.
Contact me off list for address.
Cindy Croxton
Electronics Plus
1613 Water Street
Kerrville, TX 78028
(830)792-3400 phone (830)792-3404 fax
AOL IM elcpls
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Message: 4
Date: Wed, 25 Dec 2013 21:25:16 -0500
From: Joe Giliberti <starbase89 at gmail.com>
Subject: Amiga 4000 power supply specs
Hello
I have an Amiga 4000 040 with what I think is a fouled up power supply. I
am looking for info as to what voltages should be where so i can determine
if the PSU is the problem. Any help is very much appreciated.
Thanks
Joe
------------------------------
According to the schematic there is a power connector (CN160) which has the
following pin-outs:
Pin 1: FAIL signal (470R pull-up to +5v) by plug chamfer
Pin 2: -12v
Pin 3: +12v
Pin 4: Ground (opposite pin 1)
Pin 5: Ground
Pin 6 +5v (1.8A poly-switch protection, opposite pin 3)
I don't think the schematic is model-specific. Good luck!
Jim
Hi guys,
Does anyone have a spare 5.25-inch half-height MFM or RLL ("ST506"
interface) hard drive?
I'm trying to resurrect an AT&T UNIX PC, but its Microscience HH-1090
drive is basically a brick. I can format it with the Diagnostics disk,
but the install floppy falls down when it tries to 'mkfs' the root
filesystem. Running mkfs manually produces a "write error" message.
Mapping the bad block doesn't help in the least, and the diag floppy
reports 76 bad block table (remap) entries when I run the S4TEST (expert
mode) disk diagnostic...
Anything <= 1400 cylinders and 8 heads would work fine (though I could
always lie to the machine and specify a lower head and cylinder count)
but ideally I need (cylinders * heads * 16 * 512) to be >= 40MB.
There's a bit more about this requirement and why here --
http://unixpc.taronga.com/faq/part2/faq-doc-6.html
The machine may have a WD2010 controller (I'm not sure, I need to crack
'er open and check) but it certainly doesn't have the P5.1 upgrade PAL.
Thanks,
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/
Hello
I have an Amiga 4000 040 with what I think is a fouled up power supply. I
am looking for info as to what voltages should be where so i can determine
if the PSU is the problem. Any help is very much appreciated.
Thanks
Joe
Folks,
I am teaching a course on the history of computing. I am looking for
cardboard or paper models of the IBM 360 computing system to help my
students visualize what a computer center of the 1970s would look
like. Does anyone know of a source for these models?
Thanks!
Ellis
After a trade session with Henk, I got a Siemens PT80 teleprinter ;)
I'm trying to find some info on the net but there is very little info about
the PT80, the PT80i is mentioned a lot because it was one of the first
inktjet printers.
But info about the PT80 is very sparse, so I'm looking for some kind of
service and installation info so I can connect and use the 'beast'.
I know it uses a current loop connection, but the connection board has more
connection points then used at the moment, and I reverse engineered the
polarity and Tx and Rx connections, but I'm also looking for the
possibility to address the puncher and punch reader from outside the PT80.
So if one of you has info..
-Rik
I have a trs-80 model III. It seems to work ok except that some of the characters on the screen are wrong...the computer works even though some of the characters on the screen are wrong (and they seem consistently wrong...a "?" always displays as the same bad character.
Does this sound like video ram? Or something else?
Any troubleshooting info out there?
Thanks.
-Bob
Hi, All,
Years after we were discussing the LPFK in detail, I have managed to
be home long enough to find mine and hook them up. I've also dug into
the innards a little bit to understand how to wire up a cable, and it
brings me to a question... what is pin 4?
According to the old discussions, pin 4 was described as +5V or "+5V
through a pullup" since there was clearly not a direct path from pin 3
to pin 4. My tracing of the board shows me that pin 3 is indeed +5V
in, but pin 4 is connected to +5V through a signal diode, *and* to
ground through a diode, *and* (through a small resistor) to both
inputs on one of the gates in the 74LS00 whose output is RESET.
So... it looks like a diode-clamped input for resetting the 8031. My
question is, given that one diode drop is 0.7V (I don't think these
are zeners, at least they are in orange glass packages with a yellow
stripe, not a silver package with black stripe and numbers like the
zeners I recognize), can you safely put more than 6V on this input or
not? i.e., is it meant to be connected to RTS or DTR so that the host
can easily reset it? I know more modern serial ports (those without
1488s and 1489s, for instance) don't often hit +/-12V, but I know
nothing about what the LPFK was supposed to connect to, so I can't
guess what serial voltages the LPFK would have to accommodate. Does
anyone have a pinout or a good description of the original IBM cable?
To connect up my LPFKs, I bisected an old 8-pin DIN cable and added a
DE9, and for the interface, hacked a Keyspan-brand RS-232 dongle to
sever RI from pin 9 and to bring up +5V from the USB connector. I've
seen other serial devices (like those used with a POS) that have
power-over-serial on pin 9, so I know it was commonly done for
embedded devices, but I can't seem to find a good name for the
practice (I was planning on marking altered devices with "P9" so I
know that pin 9 is powered.
It's fun finally getting some practical experience on the real
hardware and to see the sample code I wrote five years ago for Phil
Pemberton's library in action.
Thanks for any info,
-ethan
