Does anyone have the manual or workbook for a DEC Computer Lab, which is a classroom logic trainer that was made by DEC back in the late 1960s? I recently acquired two of these interesting little pieces of computing history, along with the patch cords. I'd like to have the manual so I can learn more about it.
Thanks,
Ashley
Hi Guys,
I've just posted my utility which allows you to make Cromemco BOOT disk
via a serial cable and RDOS to my site:
http://www.parse.com/~ddunfield/museum/index.html
Go to the very bottom of the main page, and select "disks and images",
the utility is called RT050410.ZIP (I'll think of a better name later).
I've also posted CROMDISK.ZIP which contains:
CDOS disk configured for dual 5.25" drives
(It's easy to make an 8" disk from this)
Cromix in both 5.25" and 8" formats.
Please refer to the RT.TXT file enclosed for information on how it
all works.
NOTE: So far this has been tested and found to work on only my one
Cromemco system, which is a System-3 with ZPU, 256KZ and 16FDC (plus
a bunch of Tuarts, PRI and WDI boards which don't matter for this).
This machine has dual Tandon 8" drives, and I've got a pair of Teac
5.25" drive attached externally ...
The RDOS on the 16FDC is version 2.52 ... it is possible/likely that
I have done things which may not be compatible with other versions
of RDOS, please report your findings to me.
I'm supposed to be picking up two more Cromemco systems next week,
one of which I know has a 4FDC (I think the other is another 16FDC),
so I should be able to verify/fix operation with the 4FDC shortly.
If anyone happens to have a spare 64FDC, I would love to have one
available so that I can get it working with the full set.
Regards,
Dave
PS: Mike S. reports that the CDOS/INIT problem with 32k occurs only
when you are running it in 64k - on a true 32k only system, he says
it works OK - if you have only 32k, you may be able to skip the
intermediate disk - hopefully we can dig up a version of CDOS & INIT
which will resolve this little oddity.
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Collector of vintage computing equipment:
http://www.parse.com/~ddunfield/museum/index.html
I am looking for specifications for the 64 pin SIMMs used in the
Macintosh IIFX and one or two of the LaserWriters (IINT, IINTX?). I
have the pinout from the "Guide to the Macintosh Family Hardware" but
could use the physical dimensions, i.e. an engineering drawing. Any
special electronic considerations would be nice to know too. I'm
thinking about running off a few homebrew boards.
One of Apple's old Tech Notes states, "The IIfx has 64-pin SIMMs,
which are different from previous Macintosh models. Developers can
request mechanical drawings and electrical specifications of the IIfx
RAM SIMM modules from DTS. Please send the request with a mailing
address and include the words "IIfx SIMM information request" in the
title of the electronic mail request or letter to facilitate
handling."
But since that note was last updated in 1991, I'm guessing that
wouldn't work any more. But if one of you sent off for that
information way back when, I would love to see it.
My main concern is that the pinout lists a separate data pin for data
in and data out. So even though they are eight bit SIMMs, there is
a Data In [0:7] and Data Out [0:7] in the pin out. It's possible,
perhaps likely, that these are simply tied together, but it would be
nice to see some confirmation. The chips I've identified on IIfx
SIMMs don't appear to be dual ported and I don't see any extra
circuitry on the SIMM that could be making an adaptation, but I'm
working from JPEGs so far. If this looks feasible I'll actually
spring for a IIfx and a few SIMMs to work from.
On the other hand, if the SIMMs require some rare dual data ported
DRAM chips, then I'll drop the idea.
Jeff Walther
Hi everyone!
I have an old Portable PC that I put a 2MB memory card in, along with an
EGA card, sound card, and some other stuff. I'm doing my best to max it
out. Anyway, I'm having some trouble with hard disks. I have two hard
disk controllers: a Seagate ST02 SCSI/Floppy controller, and a Juko Labs
D16-X IDE controller. Now both of these cards work okay, except they
recognize some strange sizes for the disks. The only disk that seems to
show up correctly is a Quantum LP105S...the others I tried, all bigger
than a gig, are either not recognized, or recognized with the wrong
size. This is also the case with the IDE controller - everything is
recognized at 10MB. I purchased an LBA PRO card for my machine hoping
to overcome the large disk size problem, but all it does is freeze the
machine...however, if I remove the 8088 and replace it with a NEC V20, I
get the banner for the hard disk drive card, and THEN the machine
freezes.
So my questions are:
1. Does anyone know a good solution for putting a large drive in an XT,
while still leaving it an XT?
2. Should I leave the V20 in? I've heard it has compatibility issues
with some programs, but I'm not solid on my information.
Regards,
Julian
For those who care, work is progressing nicely on the Internet
re-implementation of the Commodore(tm) QuantumLink service. The hope is
to re-introduce the basic service on the 20th Anniversary of the Q-Link
introduction: November 1, 2005. There is still plenty to implement, and
information to load, but the infrastructure looks to be in place. We've
secured the quantum-link.org domain for information and the eventual web
portal.
As of this week, the service has been set up for continuous operation,
with new code drops loaded in the early mornings. the server can be
accessed at qlink.quantum-link.org:5190 by a real Commodore C64/128
using an RS232 interface cabled to the Internet via PC or
RS232-to-Ethernet adapter. The server can also be accessed via the VICE
and WinVICE C64 emulator. Details for both configurations are posted on
the www.quantum-link.org home page.
As of 8-30-2005, People Connection and all main information areas are
functional, as is email, online messages, and message bases. File
transfers will be implemented soon, and then the basic People Connection
games. Re-implementing Club Caribe and the Habitat system are also
goals of the project, though more ambitious and will not be attempted
before the launch.
Although the server is still in pre-alpha stage, it regularly hosts a
lively chat in the PC Lobby with a dozen or so users. I encourage you to
join us for some fun alpha and beta testing.
The system will be demonstrated and a discussion on the methods for
re-implementing this complex service given at the SWRAP EXPO in Chicago,
IL on September 17th, 2005.
Although many folks have given support to the project, a few deserve
special mention. I want to thank the following individuals:
Keith Henrickson, who spent countless hours with the Q-Link client
runnng in the VICE monitor deciphering and reverse engineering large
portions of the Q-Link command structure and verb set. Keith has also
continued to oncover new portions of the verb set, including message
bases and file transfers
Keith Elkin, whose archived videotaped Q-Link sessions proved
instrumental in setting message layouts, response strings, and timing.
Raymond Day, who managed to archive a trace of 2 actual Q-Link user
sessions. One provided the key to fully implementing the information
areas, and allowed the extraction of 200+ menu items and 100+ files from
the original system, and the other held information crucial to
implementing message bases and provided insights on how the file areas
operated.
The VICE Emulator team. Without this tool, development would not have
progressed to this state.
Jim
--
Jim Brain, Brain Innovations
brain at jbrain.comhttp://www.jbrain.com
Dabbling in WWW, Embedded Systems, Old CBM computers, and Good Times!
Hi, Still doing some shop cleaning.
IBM S/36 Model 5362 . looks complete , less Terminal.
This is a desk side system. looks to be in good condition.
Has not been tested or turned on. Has a 8" floppy and
hard drive. There are 2 manuals inside the case.
This is quit heavy. local pick only. 75.00
Also, last call on these. They are on "Death Row"
Grahman magnetics (Carlisle) "Inspector IV MPC"
Mag tape Evaluation system.
This is a Vacuum column Mag tape tester. has lots of LED's
and LED read outs . Quit a piece to watch run. Works.
This is quit heavy. local pickup only. Free to a good home
4) DEC HSC systems. models 60 to 90. no hard drives
These are quit heavy. local pick up only Free to a good home
I'm located in Kent Wa. south of Seattle
Thanks, Jerry
Jerry wright
JLC inc.
800-292-6370 PST
The question about the ttl oscillator jogged my memory.
Anyone recognize a line of "delay line" chips with names like TD25,
TD50, TD100, etc... The look they were expensive at the time, like $10
around 1976.
The TD100 pinout looks like this:
+------+
input | 1 14 | vcc
| 2 13 |
| 3 12 | 20ns
40ns | 4 11 |
| 5 10 | 60s
80ns | 6 9 |
gnd | 7 8 | 100ns
+------+
I don't have an exact part number or mfg. (I know where I can find one
but it's not easy and will take some work)
I want to model these in verilog but I'm not exactly sure how they work.
They are delay lines, but I'm not sure how they react. The input seems
to be a short pulse from high to low of about 40ns. I'm assuming this
produces an approx 40ns pulse after the prescibed delay, but I'm not
entirely sure.
I would love to see a few pages from a data book which describes how
these react (enough to model them correctly).
any pointers?
-brad
I haven't heard that name in a *long* time. They were originally in
Goleta California and IIRC moved somewhere down south in the 70's. What
information are you after?
A. G. Carrick wrote:
> I had previously asked about a disk platter I was trying to identify. I have
> a couple of more pictures of it as well as some items from another drive.
> The latter is stamped "INFOMAG". By doing some www research I thought I had
Hi everyone!
I have an old Portable PC that I put a 2MB memory card in, along with an EGA
card, sound card, and some other stuff. I'm doing my best to max it out.
Anyway, I'm having some trouble with hard disks. I have two hard disk
controllers: a Seagate ST02 SCSI/Floppy controller, and a Juko Labs D16-X
IDE controller. Now both of these cards work okay, except they recognize
some strange sizes for the disks. The only disk that seems to show up
correctly is a Quantum LP105S...the others I tried, all bigger than a gig,
are either not recognized, or recognized with the wrong size. This is also
the case with the IDE controller - everything is recognized at 10MB. I
purchased an LBA PRO card for my machine hoping to overcome the large disk
size problem, but all it does is freeze the machine...however, if I remove
the 8088 and replace it with a NEC V20, I get the banner for the hard disk
drive card, and THEN the machine freezes.
So my questions are:
1. Does anyone know a good solution for putting a large drive in an XT,
while still leaving it an XT?
2. Should I leave the V20 in? I've heard it has compatibility issues with
some programs, but I'm not solid on my information.
Regards,
Julian
