If all else fails, I can take a voltmeter to my cable and make you a pinout table. Let me know.
Kevin
> Message: 3
> Date: Sun, 28 Apr 2013 09:24:27 -0400
> From: Rick Murphy <rick at rickmurphy.net>
> To: cctalk at classiccmp.org
> Subject: RRD50 Cable documentation
> Message-ID: <201304281324.r3SDOTpE032247 at rickmurphy.net>
> Content-Type: text/plain; charset="us-ascii"; format=flowed
>
> I'm in the process of trying to resurrect a MicroVAX-II system.
> I have a RRD50 cd reader and the associated KRQ50 controller. What I'm
> missing is the cable between the cabinet kit and the drive.
>
> I've tried various incantations, including a AUI cable (DA15 to DA15)
> and what I think is a straight-through cable. I also hooked the cabinet
> kit DA15M direct to the drive with no success.
>
> In most cases the drive spins up but when I try to boot it, the red
> error LED on the drive blinks then it spins down.
>
> So, I've got to build a cable. Does anyone have documentation of the
> pinout of what I need to build?
> Thanks,
> -Rick
Sent from my iPad
http://www.bbc.co.uk/news/technology-22249490
"Soon to be refurbished: The NeXT computer that was home to the
world's first website"
"Mr Noyes is reaching out to ask those who were
involved in the NeXT computers used by Sir Tim for
advice on how to restore the original machines."
--Toby
(NeXT owner)
After several days of trying to coax reliable results out of my Pioneer
DR-US124X CD drive on the CQD-220, I finally gave up and acquired a
proper Plextor drive. The Pioneer had various issues, some of which
may just be due to it being in bad shape - I'll have to test it out on
some of my Macs to see if that's the case. In case anyone stumbles
upon this in an archive, I thought I'd list the symptoms:
- After it warmed up, it would throw errors when operated in sync mode,
even in the CQD-220's built-in drive test
- When not in sync mode, it would work on the built-in test, but would
periodically just stop responding. VMS would eventually (after a
good 5 minutes or so) give up and declare it "not software enabled".
This had an annoying tendency to happen during lengthy installs.
- All the other drives in the SCSI chain (a hard drive, a Zip drive
and a Jaz drive) seemed to work just fine, so I'm relatively sure it
wasn't a termination issue.
And yes, the drive was jumpered to 512 byte blocks. It would boot the
VMS install CD without the jumper, but it would never proceed to
executing the standalone BACKUP program.
Someone was selling a 20x Plextor drive on eBay for a pretty good
price, so I snapped it up. It's worked 100% reliably since I plugged
it in. Perhaps their SCSI implementation is more compliant? All I
know is that they have an extremely good reputation, and their user
manuals seem to be cognizant of the various reasons you might want to
run in 512-byte block mode.
- Dave
>That was the end of my successes.
>
>testfdc sees the drive, but only 300kB DD seems to work. I tried making
>an image with the 1.2MB drive, but every sector said write error: no
>data, so I gave up.
>Then, I took a working Kaypro drive and put it in the PC, and tried
>testfdc. I overrode it as 360kb 5.25 drive, and testfdc finds the
>drive, but it immediately gives up stating "!No FDC Interrupt"
>
>So, if there is "a way to do it...", it continues to elude me.
An assortment of notes:
You need to boot to real/raw DOS ... IMD doesn't work under windows.
If you are booting from a floppy, know that IMD reconfigures the controller
rendering it inaccessable by DOS while IMD is accessing the disk - so
it can't read/write the image file from/to a different floppy. I have a boot disk
image on my site that boots and runs from a RAMdisk and contains network
tools to transfer the image off (or you can ZIP it to a floppy after IMD is
finished).
If you are booting to real/raw DOS ... does the drive work under DOS.?
Can you FORMAT 1.2M and 360k disks under DOS and read/write
them.? If not, you have a hardware problem (for DOS, make sure it is
configured correctly in BIOS - IMD doesn't use BIOS settings though).
Make sure you are using DD media, and NOT HD media - for 5.25"
diskettes, DD media usually has a reenforcing ring around the edge
of the center hole, and HD diskettes usually do not have it
1.2M drive spins at 360rpm ... DD drive spins at 300rpm ... my Keypro
disks were read on a real DD drive, so they are encoded at 250kbps.
If you write them to a 1.2M spinning at 360rpm, you need to set a speed
translate 250->300 in order for the density to come out right. My docs
and help contain more details on this.
I assume It goes without saying, but to use 1 2M drive, you need an
AT or later style controller capable of handing HD drives. If you use a
DD only controller, you need to tell IMD this - there's a command line
option - note that this would only work on DD drives (obviously).
I've had issues with 300kbps on certain controllers - mostly with single-
desnity (IIRC k4 disks don't use SD) --- I've got info on my site on
modifying 1.2M drive to run at 300rpm/250kbps which may work better
for you.
Also IIRC, some of my kay disks have an extra SD track-40 (41), which
existed on the original disks ... I doubt it's required, but I left the images
exactly as read when I posted them - if your setup only fails on track-40,
try the disks as they will probably work anyway.
1.2M drive is a 96tpi drive. Kaypro disks are for 48tpi drives - you will
need to set double-stepping when recreating the disks -- otherwise
you won't be able to read them in the 48tpi DD drive.
96tpi drives (like your 1.2M) lay down thinner tracks than 48tpi drives
(regular DD drives) - you may have issues reading disks that were
written on 48tpi, then re-written on 96tpi, then read on 48tpi ... note
that most of the time it works for me, and it would not be the cause of
errors writing and reading on the 96tpi drive ... only reading them on
the 48tpi after rewriting them on 96tpi ... you can bulk erase the disk
prior to creating it in the 96tpi drive if this is causing you grief.
If none of the above help, get back to me with exactly what your hardware
setup is, what media you are using, what speed your drive is running
(There's a test-RPM command in IMD) - and I'll try to come up with some
more suggestions.
Dave
PS: Regarding using TM-100 in PC ... I believe I have gotten one to work,
but I find more "modern" 1/2 height DD drives much easier to work with on
a PC - PC expects drive to be jumpered as drive 2 (or 1 if counting from
zero) and has issues with signals due to it's "rolled cable". IRC you need to
jumper the drive (or connector) to provide motor-on with select - it's been
quite a while since I worked with one of these drives on a PC.
PPS: I've got about 2 dozen "nearly new" Teac 1/2 height DD drives in
a box in my basement - If anyone needs one, get in touch with me and
we can work something out.
--
dave13 (at) Dave Dunfield
dunfield System/Firmware development services: www.dunfield.com
(dot) com Classic computers: http://www.classiccmp.org/dunfield
>Yes, it's possible to write a 360k disk in a 1.2MB drive. See
>http://www.classic-computers.org.nz/blog/2010-02-18-writing-cpm-from-1.2mb-…
Bulk-erasing before writing on a 96tpi and NOT re-writing on a 48tpi is a good tip,
and does work.
However (from the references web page):
>A further tip: when writing new floppies with IMD (to generate original Kaypro bundled
>software for example), I found it easiest to Format the floppy under 22DISK first, as it
>knows the correct settings for a Kaypro floppy, then use IMD to write to the formatted
>floppy. Doing this meant the only setting I had to set on IMD is the Double Step (as I
>have a 1.2MB (80 track) drive, not a 360KB (40 track) drive.
Makes no sense. IMD knows the exact format of the particular disk that it is writing
as this was determined at the time it was read, and is represented in the metadata
of the IMD file - it also formats the disk as it writes it, removing any previous formatting.
And ... if he's writing on a 1.2M drive (presumed in a HD controller) , he WILL need to
set a 250->300kbps translation in addition to double-stepping in order to write the disks.
Dave
--
dave13 (at) Dave Dunfield
dunfield System/Firmware development services: www.dunfield.com
(dot) com Classic computers: http://www.classiccmp.org/dunfield
The dawning of the Age of Aquarius. A new collection video looking at this
short-lived 1983 offering from Mattel.
http://youtu.be/YpzHPfqKLb8
Terry (Tez)
For those of you looking for recyclers in the UK where you might be able to
scrounge, or ask them to save interesting bits, please take a look at this
company. They caught my interest because they exclusively employ
disabled/disadvantaged workers. Nice to see a company that helps others
out!
About Haven Recycle
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The services we offer include removal and disposal of all waste electrical
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. Website
<http://www.linkedin.com/redirect?url=http%3A%2F%2Fwww%2Ehavenrecycle%2Eco%2
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. Industry
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. Founded
1946
_____
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.3272 / Virus Database: 3162/6281 - Release Date: 04/28/13
Tony Eros - if you want your SBC6120, please contact me off list (or just
respond to one of the other emails that I've sent you about it!).
That's it. Sorry to waste bandwidth on this, but Tony appears to be a
tough guy to get in touch with.
Bob Armstrong
I bought the Terasic DE0 a little while back.
This board is pretty decent, and I've used it for a few different projects.
Regarding documentation, the docs are overall pretty good. Pretty much
everything you need is either available at Terasic site if it's a
board-specific item, or at Altera's if it's FPGA specific.
I don't think I've looked for one thing ever that simply was missing, or
wrong. There was one thing I suggested they add as an FAQ, and despite
the fact that they told me they would, they haven't.
If you need to use pin K22, you need to look here
http://quartushelp.altera.com/current/mergedProjects/comp/comp/comp_tab_dp_…
and set the nCEO (or was it NCSO) pin as regular I/O.
Otherwise: you'll get a multiple drivers error during compilation, even
though YOU aren't driving it more than once.
This is important for VGA applications and affects one of the BLUE signals.
The user manual pretty much gives you everything you need
http://www.terasic.com.tw/cgi-bin/page/archive.pl?Language=English&Category…
The control panel is useful, but I think a lot of the sample apps use
NIOS, and unless you are going that route, the example code isn't helpful.
Quartus II (free version) is pretty decent, at least in comparison to
Xilinx's ISE (that I haven't used in a couple versions). It's smaller,
faster, lighter, and so on.
These tools are PIGS in general, so it's all relative.
Learn how to use SignalTap II, the built in the logic analyzer, and life
is very good.
Memory controllers are the bain of FPGA hobbyists, I made minor changes
to one I found online, and it works fine on the DE0. I'd give the link,
but it seems to have gone offline. I'm working on a local mirror on my site.
(http://web.archive.org/web/20130123011711/http://whoyouvotefor.info/altera_…)
Yes, SRAM is easier, but usually less plentiful. There aren't many other
options if you want a decent amount of memory.
Here's 16-channels of 5v conversion for $15 off the shelf
http://www.seeedstudio.com/depot/logic-sniffer-16bit-input-buffer-wing-p-72…
Here's what I created
http://techtravels.org/?p=488
Works pretty decent
Recommend
http://www.amazon.com/Bebop-Boolean-Boogie-Third-Edition/dp/1856175073/ref=…
and
http://www.amazon.com/FPGA-Prototyping-Verilog-Examples-Spartan-3/dp/047018…
or similar.
Hope this helps,
Keith
And nearly another year has passed by ...
This version includes:
- improved TCP/IP lost packet and retransmit support
- DHCP lease expiration detection and warning
- IRCjr: mIRC color codes, improved logging support, 132 column
awareness, bug fixes
- FTP client: user input can be longer now (2 lines), 125 responses from
the server handled better
- FTP server: improved compatibility with more clients.
- Telnet: improved emulation (scroll regions and DEC Origin Mode support)
- Many other small fixes and improvements ...
Everything is available at http://code.google.com/p/mtcp/ .
Mike