The PDP-9 at the RICM uses a bunch of B602 Pulse Amplifiers. One in the
Processor Microcode clock circuit is intermittent. The transistors are
listed in the Schematic as DEC-6A and DEC-6B. The parts are marked
DEC-2894-3A and DEC-2894-2B.
Can I substitute 2N2894 parts for these transistors?
--
Michael Thompson
So, I've got a PC here with a brain-dead BIOS that only acknowledges 3.5"
HD drives. Ugh. I can hook up a 5.25" HD drive instead and override the
BIOS type when booting Linux (passing "floppy=0,2,cmos" to the kernel), and
that seems to work.
However, when hooking up a (good) 5.25" DD drive (and using
"floppy=0,1,cmos") I consistently get I/O errors.
Anyone have any theories as to what the problem might be? Maybe the FDC in
the machine just plain doesn't support 250k/s transfer rates (unfortunately
I don't have any 3.5" DD media to test that by formatting a disk in a 3.5"
HD drive) - but that would seem like a weird feature to abandon?
Formatting 5.25" DD media in the HD drive *appears* to work, but I assume
that will be using a 300k/s rate rather than 250 (and of course the
narrower head width makes it pointless anyway)
I can haul another PC out of storage with a better BIOS/FDC, but I'm still
curious as to what the problem might be with this setup. Linux just
identifies the FDC as a "post-1991 82077" (for which 250k support is
claimed), but I expect it's a reimplementation within a larger I/O chip
rather than a discrete FDC IC.
cheers
Jules
After a few hours' work, my old 300MHz beige G3 tower, pulled from a
dank corner of the garage, is up and running again with a stonking
384MB of RAM and a clean install of MacOS 9.2.2. All praise to the
University of Glasgow for hosting free International English (etc.)
versions of the 9.x updaters!
http://www.gla.ac.uk/~gwm1h/macos9/
--
Liam Proven * Profile: http://lproven.livejournal.com/profile
Email: lproven at cix.co.uk * GMail/G+/Twitter/Flickr/Facebook: lproven
MSN: lproven at hotmail.com * Skype/AIM/Yahoo/LinkedIn: liamproven
Tel: +44 20-8685-0498 * Cell: +44 7939-087884
I always love dragging out the Atari 400 and taking those classic games for
a spin. Here is another one of my video remakes for those who might be
interested. http://youtu.be/UNf8OQaud2M
Tez
looking to run one of my computers on 98se and am looking to find the
updates for 98se the archived updates and not the unofficial service
pack but the updates all the way up to july 2006 if anyone knows where
to get them let me know
The slowly-growing document archive at Chicago Classic Computing now
has an RSS feed! Now you can receive notice of newly-posted scans on
your desktop, in your pocket or on whatever device you've hacked
TCP/IP and RSS onto. The address is:
http://chiclassiccomp.org/docs/content/rss.xml
Thanks much legalize for his script and AEK and others for their help
getting it going on our site.
-- jht
Hi,
Just to announce the second Vintagebytes.ch retrocomputer meeting in
Lucerne, Switzerland:
We meet on February 12th again with a presentation on replica's (KIM-I,
Apple I, PDP-8 ) and subsequently, we will host a KIM-I repair fest. Well,
two of us bring our sickly KIMs along, and there will be a third working
one too. Three KIMs in a room - that's a KIM party. Feel free to bring any
other vintage machine along too of course.
More details are on our web site http://vintagebytes.ch/ .
We look forward to meeting up with any of you living in the area!
Cheers,
Oscar.
Hello everyone,
FYI as of today I am no longer associated with the Living Computer Museum.
Cheers -- Ian
--
Ian S. King, MSCS ('06, Washington)
Ph.D. Student
The Information School
University of Washington
Madness takes its toll - please have exact change.
I'm trying to get TME[1], a Sun emulator, compiled and I'm running into
trouble. First, the Makefile is set to interpret all warnings as errors,
so I can't get past the complaint about libtme/module.c assigning a value
to a variable but not doing anything with it. I disabled this in
configure.in, but when I rebuild the configure script with
aclocal && automake -a -c -f && autoconf, I get a complaint like this:
thoth:/usr/local/src/tme-0.8$ make
cd . && /bin/bash /usr/local/src/tme-0.8/missing --run automake-1.11 --gnu
Makefile.am:7: `pkglibdir' is not a legitimate directory for `DATA'
make: *** [Makefile.in] Error 1
Any ideas?
[1] http://people.csail.mit.edu/fredette/tme/
--
David Griffith
dgriffi at cs.csubak.edu
