I have a PDP-11/34a UNIBUS system, and the RL11 controller just died on me.
I haven't a spare RL11 to diagnose it with, so I've been toggling in whatever
test programs I can find.
The RL02 drives I have, the cables and the packs are all verified good by
booting and testing them on an 11/53 system.
The symptoms are as follows:
o No drive will boot. CPU halts.
o Using vtserver, I can copy the first 8 blocks from any drive back to the
vtserver host, but then fails on block 8 with HNF (Header Not Found) in
the CSR. Always block 8 (blocks 0 thru 7 always read fine).
o A toggle-in oscillating head positioner test code (from the manuals) seems
to audibly indicate the head carriage is moving back-and-forth continuously.
o The machine seems otherwise unaffected. I can toggle in and test basic
machine functionality for memory, CPU, interrupts, etc.
It seems quite certain that I have a RL11 controller that has stopped working properly.
Not having any other UNIBUS disk systems or any way to boot XXDP, I can't do any further
testing.
The machine and disk were working fine, and I was even running diagnostics on it when the
failure occured.
My question is this: Is such a sector addressing failure at all common enough that
someone could suggest replacing one or more components on the RL11 controller before
I try to obtain a replacement and chuck this one into the trash?
Perhaps someone has a working controller they could sell?
Thanks in advance,
-scott
staylor (at) smedley (dot) mrynet (dot) com
At 05:37 PM 10/28/2006 William Donzelli wrote:
>>OK, so how much floor space does his largest computer use?
I worked with he IBM 7030 (stretch) many years ago and it took up a
very large room certainly much more than 500 sq ft. It was enormous.
Hi folks,
I unfortunately lost access to the net last
Sunday/Monday when my Dreamcast (model
HKT:3010 (Hong Kong)) started resetting itself
randomly (usually every 5-10 seconds). Despite
having another one (partially broken - the GD
disc drive doesn't work), a model HKT:3000
(Japanese), I was unable to sort the problem
out.
I did opened up the spare one as a test run
and gave it a good clean out. I checked it
still worked and, apart from the GD disc drive,
it did. I opened up the one I had been using
and, apart from a dead spder in there, it
wasn't at all dirty.
I looked over the connections and did
everything I could to try and get it working
again. It still resets itself randomly, making it
pretty useless other than for spare parts.
I have borrowed my dads one (model HKT: 3030
(UK/Europe?)) so I can get back online and
get a new one from eBay :)
While poking around inside the Dreamcast
games consoles I noticed some familiar
components which I has seen similar versions
of in my Amiga.
The first one is what I have dubbed the "power
towers" and they look like vertical batteries.
Usually come in groups of 5. Can anyone tell
me there name and/or what they do?
The second thing is the erm... plastic(?) "polo
mint" that has what appears to be copper
wire wrapped around it. Can anyone give me
(or send me in the right direction to find)
any information on it.
Thanks in advance,
Andrew B
aliensrcooluk at yahoo.co.uk
As far as the origins of DOS: How many of you have read the chapter on
Gary Kildall in "They Made America," by Harold Evans? A used copy can now
be had for cheap (bookfinder.com or amazon.com). Evans used Kildall's unpublished
memoir as one of his source documents. Of course, folks can always take issue with Kildall's
memory (or slant on things), but in the book, Kildall claimed that he _did_ strike a deal
with the IBMer's (including a hand shake -- after returning from his prior engagement with
Godbout[iirc]). If Gary's story was accurate, well, then this story would be one of the
largest cover-up's in the latter 20th Century. Like someone was kind enough to mention
on this discussion group, a year and a half ago, Paterson is suing Evans. Grab a copy of
the book. It's an amazing story. I cherish my copy...
And while we are on the topic of rumors(or perhaps, facts): It's rumored that the Caldera suit
(the one that started out as primarily a complaint about M$'s "aard code" (which was pretty much
the death knell for DRI) -- ended up morphing into something far greater. It's alleged that the
original complaints (by Kildall) were contained in the documentation that Ray Noorda got
when he purchased rights to DR-DOS (and related software. eg: CP/M). It's alleged that
it was incredibly damning evidence that M$ wanted to keep surpressed at all costs. In very
early 2000, Caldera did win its case for a undisclosed amount (I know that there are readily
available figures of the award, but some have stated that those figures were intentionally
low-balled).
True? I don't know, but I sure wish I had access to the 937 _BOXES_ (not pages) of
documents that were shredded. It does seem a little _odd_ that these historic documents
would be so conveniently turned into toilet paper.
http://www.theregister.co.uk/2003/05/22/sco_pulps_calderams_trial_archives/
I hope the truth eventually comes to light, but I'm not counting on it. Meanwhile,
it sure is interesting...
Regards,
Robert Greenstreet
On monday I am having 100 gallons of anti-fouling paint and two
Killowat linears delivered to the house. There is no room in the
garage. Today we are cleaning it out.
My wife sais, "you havent used it in 5 years junk it." I agreed.
Then I started picking things up and saying, "This is a good computer"
My wife says, "you havent used it since 1962, junk it." She is
right.
I have boxes of software and software and hardware manuals which I
estimate it would take me 3 days to catalog and put on ebay or offer
on this list. It will take less than 4 hours to carry it all to the
curb. AND I need the space monday, not a month from now.
I have boxes of laser printer parts and VGA cards and all manner of
CPUs and chips. They are all going.
I have boxes of pin feed paper that its easier to haul to the curb. I
have boxes of books that weigh to much to ship.
How do I quiet my consience that keep screaming at me, "Someone would
really like this."?
If there ia anyone in the Corpus Christi area that is interested, the
trash man wont be here till Wed and if it doesnt rain, some of this
stuff has value.
I have a 10 car garage and there are only 5 cars in it and I dont have
space for 100 gallons of paint!!!
--
Jim Isbell
"If you are not living on the edge, well then,
you are just taking up too much space."
>
>
>From: Fred Cisin <cisin at xenosoft.com>
>
>Tim Patterson never denied that QDOS ("Quick and Dirty OS") was based
>closely on CP/M.
>
>
Just FYI. Tim's last name is spelled 'Paterson'.
alan
Hi, all,
I've posted on the Spare Time Gizmos Yahoo Group, and I've written Jim
Kearney twice and no responses yet - I have a couple of IOB-6120s
that, due to the nature of the ECOs, I haven't yet installed SRAM on.
I'm having problems with the fix between the 74ACT138 and the BQ2201 -
what instructions I do have say to lift certain pins before installing
both chips, and I've done that; what I'm lacking is the specific
directions about how to connect the two with a green wire (where it
goes, possible track cuts, etc).
I have the directions for the resistor-and-FET fix to the SRAMs
themselves. I've decided to skip the 1/8W 10K resistors in favor of
1206 SMT resistors mounted flush to the SRAMs (I'm worried about
snagging something and busting off a pin). Unfortunately, without the
BQ2201 portion of the fix, my IOB-6120 is somewhat inert.
Thanks for any pointers,
-ethan
P.S. - I already have the info at http://www.jkearney.com/sbc6120/kit-A.htm
>
>Subject: Re: The Origins of DOS
> From: "Jim Isbell, W5JAI" <jim.isbell at gmail.com>
> Date: Sat, 28 Oct 2006 10:27:19 -0500
> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>
>TRS DOS market was prety big at the time. To begin with it was the
>ONLY desktop computer available in the mass marked....almost two years
>if memory serves me well. There were several "mini" computers around,
>but nothing like the RS computer with 8k of memory and a tape system
>for probgam loading/saving and BASIC.
>From inside Tandy (at that time) te most common units sold had 16k and
the L2 (12k) Basic with the 16k L1 basic using being a close second.
Rare was the 4k with L2. As to 8k that was either a user hack or
one of a short lived flavor using halfgood 16k parts both of which
were far less common.
>From experience and being active in computer world of the time S100
was the workhorse systems as were early Apple][ with disk and RS had
volumes of (>200,000 first year of sales) of the basic 4kl1 systems.
That was the 1978 view. By 1980 Apple][ with disk, TRS80 with EI
and disk were by far very prevelent though S100 crates were still
being used widely. Apple and RS were dualing for the then infant
personal desktop computer market and had put a lot (n > 50,000 with
disks) of machines out there.
The market from what I'd seen went from near 0 (under 10,000 home
computers existed) in 1974(december) to somewhere over 1,000,000
(possibly far more) by December of 1979. Explosive growth!
Several things drove this. Lower cost of hardware that included some
mass storage(minifloppy). Availability of more user friendly packaged
systems(no soldering or kits). The availability of software applications
editors, high level languages, software development packages and of
course the killer apps of early desktop word processing [Electric
pencil, Wordstar] and spreadsheets [visicalc].
Allison
>
>On 10/28/06, Chandra Bajpai <cbajpai at comcast.net> wrote:
>>
>> How big was the TRS-80 Market to support all thoses DOSes?
>>
>> I remember when NewDOS/80 and I just remember it being fast. Any idea who
>> wrote that?
>>
>> -Chandra
>>
>>
>> -----Original Message-----
>> From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
>> On Behalf Of Fred Cisin
>> Sent: Friday, October 27, 2006 10:24 PM
>> To: General Discussion: On-Topic and Off-Topic Posts
>> Subject: Re: The Origins of DOS
>>
>> On Fri, 27 Oct 2006, Warren Wolfe wrote:
>> > [TRS-DOS]
>> > It was its own universe, Jim. The links and questionable parentage
>> > of the original version of DOS are tied directly to CP/M, which was the
>> > first O/S for personal computers that any significant number of
>> > businesses embraced. And, Windows came out of the DOS world, and now
>> > dominates as few products have dominated before. (Note: I am NOT
>> > claiming this is a GOOD thing.)
>> >
>> > From what I can tell, TRSDOS was not a rip-off of anyone's software,
>> > and nobody bothered to rip it off, so it's pretty much out of the world
>> > of O/S scandal.
>>
>> There WERE several imitators of TRS-DOS (although still for TRS-80),
>> including NEWDOS, DOSPLUS, and the semi-legitimate offspring LDOS.
>>
>> > It actually was pretty decent, and had a few ideas of
>> > merit that didn't make it into the mainstream world for a while. It was
>> > just totally tied to Radio Shack computing, and suffered a mortal wound
>> > when IBM came out with their PC. No fault of its own.
>>
>> Rasio Shack AVOIDED expanding TRS-DOS into other semi-related hardware
>> platforms.
>>
>> --
>> Grumpy Ol' Fred cisin at xenosoft.com
>>
>>
>
>
>--
>Jim Isbell
>"If you are not living on the edge, well then,
>you are just taking up too much space."
I'm a very happy Cardinals fan stuck on the East Coast. Are there any St. Louis folks on the list who might be willing to pick me up a copy of the Post Dispatch for Saturday and Sunday? I would be happy to pay for the papers, shipping, and a little for your trouble...
Thanks!
-- Tony
I am looking for the Space Voyage program made by TSC back in the 70's. I would like to port it to the 68hc11. Do you know where I could get a copy of the listing. I had the book but lost it years ago. I have found the s19 files but the I/O and the ram location will have to be changed.
Thanks for your time
Sam Ammons
On 27 Oct, 2006, at 07:41, ard at p850ug1.demon.co.uk (Tony Duell) wrote:
> It's not that hard to trace out schematics of a classic computer [1],
Not all classic computers are micros. Fancy tracing the schematic for
my 500 square foot second generation mainframe? Fortunately I
have most of them, along with the 'address book' which lists every
logic signal, its sources (think wire-OR) and destinations. Its on
roughly A3 paper and is in two volumes four inches thick.
Welcome to the new chap.
BCD is not just a bit coding, its a card code as well. It lacks things
like parentheses and brackets but has things like 1/4, 1/2 and 3/4.
My 1301 uses it, though strangely there is not a one to one mapping
>from characters from the card reader to characters on the line
printer! The old Friden Flexowriters used a similar code too, though
they seem to have varied too. The old Elliott 920 code was different
>from the code used by my own Flexowriter (which could punch and
read 8 paper tape, or using the same mechanism, along the edge of
a punched card size medium which I think could be fan-folded. I
guess this allowed the operator to write on the rest of the card).
Roger Holmes
(Who has at home what might be a collection of the largest
computers in private ownership - unless you know different
as Esther Rantzen used to say on "That's Life").
Another Ebay find came in today, a 486 EISA motherboard and 5 cards.
The motherboards seems to be this model: http://artofhacking.com/th99/m/U-Z/31111.htm , but I can't find a company name on it anywhere. It has 8 EISA slots seems to be setup for a 486 DX. it looks like there are 2 DALLAS real time clocks on it, and the machine complains the eisa config battery is low. Are there any cheap hacks to get around this?
The cards that came are the following (all EISA):
HP 10Mb and 100Mb network card has a HP/AT&T 100VG chip
Aview 2e Video card, 1MB VRAM
Adaptec AHA-2740 and AHA-2740A SCSI 50 pin (no floppy controller) SCSI cards
Mylex DAC960-1/2 caching controller card with what looks like 16MB (maybe 4MB) of RAM installed (4x30 pin). The card has a nice big Intel i960 chip (first one I have).
When the machine boots I don't see any info on what processor the system has like you would normally see on a 486 system, and no BIOS screen for the SCSI cards comes up either (not that there is anything connected to them). The caching controller is odd looking because of the large SCSI connectors ( there appears to be a 50 pin SCSI internal , and 2 68 pin SCSI (one looks like a normal 50 pin but its long and has 68 pins, the other looks like a 68pin connector on newer cards but the pin spacing makes it look 3x longer). Is this a raid only card and do I need special cables for the 68 pin connectors or are there adapters for these?
I never used an EISA machine before (one of the reason I snagged these) and was wondering if there is anything special about them. Is there a standard configuration utility for EISA cards or do you need to find one for each card?
Also since this machine is all EISA slots would putting an ISA card in one of them slow the BUS down? I need to find an EISA floppy and I/O card to complete this, anybody have one they don't need?
TZ
Hi,
I just noticed there was a small typo-error in the list.
Item#26 should read as TQK50 tape controller (M7546) instead of the DEQNA which is listed in item #1 MicroVax II board set
Also item#31 should read as Emulex DH01
thanks and rgds
william
---------------------------------
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Contribute to the Yahoo! Time Capsule and be a part of internet history.
i have two omnibot 2000. one only needs gear in right
sholder the rest like new in org. box.#2lights lt&rt
head fw rev ok tape does not work rt arm goes up but
not down .make me fair offer and you can both.ihave no
idea of shiping coast.tim 501 362 8069 9am too8pm
Thank you Tim
Hello Henk,
You were right, my mailbox have been swampped and it will take me a while to sort out who needs what and how to cut the deal. some of the items I would gladly be "contributing" towards charitable cause with shipping cost covered, but certain items that are still of commercial value and purpose will have to be negotiated.
I am impressed by what I saw on your web site and the efforts in building a pdp museum. Will revert to you soonest, pls bear with it for a while.
Thanks to everyone for sending me your request, I promise to respond to your emails but can't be sure if I can accommodate all your needs!
Rgds
William
Hello William,
I read your post yesterday, but did not reply as I expect that
you will get *many* replies. This morning I re-read your message
and thought "Well, if I don't try I will sure not get lucky" :-)
So, I give it a try and send an e-mail ...
I am sure you will get plenty interest for the SCSI stuff, but
to maintain my collection (see www.pdp-11.nl ) I would love to
get the following boards:
> 3. PDP-11/34 UNIBUS board sets:
>
---------------------------------
What will the world find in 2020?
Leave a part of your 2006 in the Yahoo! Time Capsule. Contribute now!
>
>Subject: Re: Yet Another Old Cyber-Coot
> From: ard at p850ug1.demon.co.uk (Tony Duell)
> Date: Sat, 28 Oct 2006 00:08:13 +0100 (BST)
> To: cctalk at classiccmp.org
>
>> >
>> > I am not sure what you mean by 'in one package'. I personally think the
>> > Epson QX10 is one of the nicest CP/M machines ever, but that has a
>> > separate monitor and keyboard so it might not be 'one package'.
>>
>>
>> What I mean by "one package" is that the machine is a complete
>> computer -- monitor and keyboard built in. One plug, one diskette, and
>> you're off... My personal preference is for separates, in computers,
>
>Well, the Epson QX10 meets the second of those criteria. It's 3 units
>(processor box, keyboard, monitor), but there's only one mains cable (the
>monitor, and obviously the keyboard [1] take power from the PSU in the
>processor box).
Visual 1050, main box has two floppies and the monitor sits on top of it.
If you have the hard disk (sasi interface) then it's three. Z80, 128k
with 6502 to do monochrome text and graphics. Runs CP/MV2.2 and CP/M+.
For an all in one box, North*Star Advantage Z80, 128k One or two
floppies and hard disk Runs NS*dos, CP/M2.2 or UCSD PASCAL.
For laptop, PX8 with 120k ramdisk wedge. For totable Kaypro 4/84
with 360k 5.25 floppy, 720/781k 3.5" floppy, Turborom with personality
card, Handyman and Advent 1mb ramdisk.
In the range of sperates, will S100 do? I also have others.
>
>[1] Although I do have a keyboard from a Ramtek graphics unit which does
>have it's own internal mains PSU.
>
>> > I'm also partial to the RML380Z, but mainly becasue that was the first
>> > CP/M machine I used )at school).. And to be honest, CP/M was a let-down
>> > after the LDOS I used at home on my TRS-80 Model 1.
My $.02 is LDOS was later and had some good ideas but the software base
of applications was smaller.
>>
>> Perhaps... But CP/M was a hobbyist O/S that sort of became the
>> industry standard. Cool, in a way. The closest thing to THAT today is
>> Linux, and that's a tad bit complicated (and too good) for hacking it to
>> be much use.
>
>I've always thought the analogy is between CP/M and MSDOS (and not
>because of the obvious technical similarities). Both are pretty minimal
>OSes, both became industry standards, and in both cases there were often
>better choices available.
The biggest reason CP/M succeeded was it was good enough, easily ported to
new hardware and inexpensive. Because I abstracted the hardware sufficiently
the base of software grew as it ran on any machine that could run CP/M.
>> And, truth be told, it's clear that a lot of the people I've seen
>> post in the last 24 hours obviously know a lot more than I do about
>> quite a few things. That is as it should be. Normally, I'm the alpha
>> geek wherever I am, so it's refreshing to think I'll be LEARNING things
>> for a change. So far, it reminds me of the Aloha Computer Club back in
>> the 70s... Everybody is knowledgeable, and some VERY much so, but all
>> experienced in somewhat different areas. Seems like a friendly group,
>> too. I'm a painfully honest person (I know, I know, liars say that,
>> too) so I'll let people know when I don't know something. But, I have
>
>I think you are going to fit in here. I certainly consider that the day I
>stop learning is the day I die. And I think everyone here is basically
>very honset (certainly all the classic computer collectors I've met face
>to face are).
Roger That!
Clipped off the Monroe discussion. Nice machine but memory serves they
were not simple hardware!
Allison
Does anyone have a copy, or preferably a scan, of the Byte article c.
1976 entitled "WADUZITDO"? (It's an interpreted "high-level" language
so named by the author since everyone looked at his Altair or IMSAI
sitting there and asked, "So what does it do"?)
There were two versions (for 6800 and 8080) each of which occupied a
whopping 256 bytes! I recall toggling it into my homebrew 8080 machine
back in '79 and it actually worked and ran simple programs as promised.
I can't find the funny-smelling "wet" photocopy I made at the Computer
Science Center at U. of Md., last seen 25 years ago...
thanks
Charles
EBCDIC had all sorts of representations. The most variation was in the area of
control characters (0x00 to 0x3F). Most of the alpha symbols were pretty
standard. The best help was if you knew how cards were punched. That helped
quite a bit, but there were all sorts of wierdnesses. The most blantant one
was the translation of 0-2-8 (it is labeled that way on an 029 keypunch) into
0xE0. It didn't match the "pattern" at all. I helped design (with logic
gates) a converter from card code to EBCDIC and it wasn't fun. It was before
roms were wide spread which would make the job MUCH easier. Proper card codes
had only a single punch in rows 1-7 (or none) which can be coded as three bits.
The other rows (12, 11, 0, 8, 9) made up the other 5 bits. Shuffle that thru
a 1702 ROM (256 addresses, 8 bits) and you could (with proper programming) get
EBCDIC out the other end. The proper programming of the ROM is left as an
excercise to the reader.
Another observation:
A long time ago I wandered into the DMV to do some menial task, and they had a
big thick book of "taken" vanity plates. Having some time to waste, I looked
thru it and saw the plate "E2C5E7" listed, and also the plate "E2C5E7Y" listed.
Their interpretation is also left as an excercise to the reader.
So EBCDIC lives on in wierd ways, where numbers need to be collated AFTER letters.
--
Tom Watson
tsw at johana.com
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Tired of spam? Yahoo! Mail has the best spam protection around
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Apparently now that I actually need them, I can't find any of my RX02
controllers. Anyone have a spare RX211? Board is M8256, for a unibus box.
If you do have one available I'd be happy to trade for it or pay reasonable
sums of cash.
Thanks!
Jay West
Scribed by "Chuck Guzis" <cclist at sydex.com>:
> I was going over some old 8" Intel diskettes and discovered some that
> have the legend "MDS is a registered trademark of Mohawk Data Science
> Corporation"
>
> Does anyone remember when Intel started adding the asterisked text to
> "MDS"?
>
> Cheers,
> Chuck
All I know is some history: Mohawk Data Sciences did all sorts of things
in the 60's and 70's. Their main "claim to fame" was a key-to-tape machine
that was to replace keypunches (remember 029 keypunches) with something more
"modern". They did find some place, but I never used one. On the other hand
I was (un)fortunate to interface a Mohawk printer (a model 4330 to be exact) to
a larger computer (A Xerox Sigma 5) and it had (still has on the case) a nice
MDS logo. I suspect that Intel started using MDS as a marketing term and the
lawyers from Mohawk made a nice call on the phone.
Another observation: Later Xerox Sigma CPUs had a sticker (inside the control
panel door) indicating that the term "Sigma" was used under license from some
corporation (Sigma Relays?). They probably got a lawyer call as well.
Sometimes these things take a while (years), but eventually it all works out.
A recent (very bad) example was a guy called Mike Rowe (I think) who wanted to
sell software on the web. He got a "nastygram" from the guys in Redmond who
didn't appreciate it too much. I'm sure you can search for the end result.
Note to wise: If you think you have a trademark, do a little search. It might
save some real money at a later date.
--
Tom Watson
tsw at johana.com
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Tired of spam? Yahoo! Mail has the best spam protection around
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I have a bunch of spare parts sitting in my house for quite a while, all are good and many unused as these were formerly support spares or inventory left over. anyone interested pls contact me directly, main constraint is all these are located in Singapore so have to find a good way to get them over to whichever corner in the world!
1. MicroVAX II modules:
KA630-AA CPU board with 1MB memory
MS630-BB 4MB Memory
Emulex QD21 ESDI disk controller
DEQNA Ethernet controller
KDA50 SDI disk controller
KFQSA-AA DSSI-to-Qbus adapter
2. Digital VAXstation 3100 model 30 with:
52MB internal SCSI disk
1.3GB external SCSI disk
8MB memory
3. PDP-11/34 UNIBUS board sets:
M7891 (set of 2)
M8265/M8266
M7485/M7486
Emulex SC12 disk controller
Emulex TC13 tape coupler
4. SUN 4/65 SPARCstation 1+ with:
16MB memory
external Shoebox with 150MB QIC tape
327MB SCSI disk
external CDROM drive, Toshiba
external 4GB Baracudda Disk
5. Clearpoint DNX4RAM/8MB 8MB memory for Apollo DN4000 (unused)
6. Clearpoint DNXRAM/2MB 2MB memory for Apollo DN2000 (unused)
7. Clearpoint DCME-V88/16MB 16MB memory for VAX85XX
8. Clearpoint DCME-V78/8MB 8MB memory for VAX780 (unused)
9. Clearpoint DCME-V75/1MB 1MB memory for VAX750 (unused)
10. Clearpoint SNX2RAM/8MB 8MB memory for SUN 4/2XX, 3/2XX, 3/4XX (unused)
11. Camintonn CMX-1211D 12MB memory for MicroVAX 3100 (unused)
12. Camintonn CMX-871 8MB memory for DECstation 5000 200/240 (unused)
13. DATARAM DR650/32MB memory for VAX63X0 - VAX66X0 (unused)
14. DATARAM DR650/64MB memory for VAX63X0 - VAX66X0
15. DATARAM DR650/128MB memory for VAX63X0 - VAX66X0
16. DATARAM DR3100VS/16MB 16MB memory for MicroVAX 3100 (unused)
22. Clearpoint DCMS-TSB VAXBI-to-SCSI Diff tape controller for 8mm (unused)
23. CMD CQ0220A SCSI host adapter for Qbus, single ended
24. CMD CDI4000/SC DSSI-to-SCSI bridge adapter for 5.25" SCSI drives
25. Digital RQDX3 disk controller for Qbus
26. Digital DEQNA Ethernet controller for Qbus
27. Digital DPV11 single line sync comm controller for Qbus
28. Emulex UC06 SCSI host adapter for Qbus, Differential
29. Emulex UC07 SCSI host adapter for Qbus, single-ended
30. Emulex UC08-III Dual SCSI host adapter for VAX4000 Qbus
31. Emulex DA01 SDI Disk Channel Card for HSC controller
32. EXCELAN EXOS1219-08 Intelligent Ethernet controller for MVIII (unused)
33. Emulex P3000 4 port Print Server (unused), LAT/TCP with:
P3KDP Dataproduct I/F
P3KCEN Centronics I/F
P3KPC DB25 I/F
P3KSER Serial I/F
34. Emulex NJ01B-NT+ NetJet Print Server for HP MIO Printers (new), LAT/TCP
35. Emulex NJ01B-NT+ NetJet Print Server for HP MIO Printers, LAT/TCP, used
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Just saw these listed as "gold scrap", not sure if they are indeed HP
boards, but thought I'd pass it along. Looks like only about an hour and a
half to go on them, unfortunately.
-Toth
I have a qustion about powering the 8" disk drives I have connected to my disk duplicating computer. Specifically, what is the "best" power on sequence?
The drives I use are the Tandon TM848-2E. It requires 24V @ 750mA and 5V @ 450 mA to operate. Pretty easy so far.
I use an external power supply to power the drives. I want to add a relay powered by one of the diskette drive lines from the standard PC supply to turn this power supply on. Again, faily simple.
My question is what is the best order to turn things on. I've always turned the drive on before powering up the PC, and turned the drive off after powering off the PC. Does this really matter? I always make sure there is no disk in the drive before doing any power cycling.
To simplify matters, I could always just put everything on one big switch on the mains. You know, like using the power strip to power on/off.
Any opinions about this? Any suggestions?
Thanks,
Kelly