On Oct 25, 10:30, Ethan Dicks wrote:
>
> --- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote:
> > On several occasions I asked for 'An ST506 interface hard disk of about
> > 50Mbytes' and had to explain what I meant...
>
> Yes, but how many heads did it have? Was it an ST506-interface drive
> or an ST412-interface drive? It's being pedantic, but there is a
> single-line difference. One could imagine a controller that could
> handle a real ST-506 but not a real ST-412 drive. AFAIK, by the time
> PCs supported the ST-225, it was a moot point, but pre-PeeCee controllers
> might not be happy.
Or the other way around; IIRC most ST-412 style drives would accept slow
step pulses. I have an ST-506 style drive that won't work on almost any
controller I have because it can't keep up with fast step pulses that an
ST-412 would buffer.
--
Pete Peter Turnbull
Network Manager
University of York
>> that the pin sticking thru the back side would have a blob of solder
>> around it that would have a crack in it, and possibly be seperated from
>> the board. If I remember right, it was a red cable in a group of cables,
>> located kind of in the center of the board.
>
>In the middle of the board there's J4, which is the cable to the logic
>board. I've never had dry joints there.
Yes, J4 is what I was thinking of here. This is the one that commonly
cracked, and carried the smack the case repair tip from Apple. I am
amazed you haven't seen it go, I think every Mac Plus I repaired had
signs of that joint having been overheating and arcing (one was so bad,
the PCB was eaten out around the connector, and the insulating cover had
a hole burned thru it). Most were cracked and needed to be resolded. Of
course, mine all would have looked worse, as for quite some time, they
were all treated with the case smacking... and many of the staff didn't
understand to hit it gently, to jar the connection, not punch it to knock
the mac off the desk (I started doing repairs when I came in one day to
hear a chorus of *SMACK* &#@&$(@#&*# *SMACK* going up and down the
halls... but back then I was part time, so things had to get pretty bad
before anyone called me to come in)
>> The final common problem was a bad diode near the bottom of the board.
>
>The component reference for that would be interesting. Maybe one of CR21,
>CR20, CR26 (recitifer diodes for the 3 main supply lines)?
The one I was thinking of is CR20. (I am almost positive that is the one,
I have to base it off my notes unless I am going to actually open one of
the repaired macs and have a look)
-chris
<http://www.mythtech.net>
The problem is not the need for an inverter but the right cab kit so it
all come out to the right connector.
Allison
-----Original Message-----
From: Ethan Dicks <erd_6502(a)yahoo.com>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Thursday, October 25, 2001 1:46 PM
Subject: Re: first step getting VAX 6000-400 booted ...
>
>--- Gunther Schadow <gunther(a)aurora.regenstrief.org> wrote:
>> - The DMB32 parallel printer is not a Centronics interface. But
>> I may actually have a printer to go with it. A BIG thing, not
>> heavy but taking up precious space if I put it into my
>> basement.
>
>We used to use an LP25 on our DMF32 (Unibus ancestor of the DMB32). It
>was a Dataproduct printer with a DEC badge. I do recall seeing a simple
>circuit somewhere involving an inverter or two to attach a Centronics
>printer to an LPV11. It shouldn't be a complicated matter to examine
>which signals on the DP port are low-true and which ones are low-true
>on a "Centronics" port and deduce which handshaking lines need inverted.
>
>-ethan
>
>
>
>__________________________________________________
>Do You Yahoo!?
>Make a great connection at Yahoo! Personals.
>http://personals.yahoo.com
This is easy...
LAV-11 with DMF32 cab kit. The latter is needed for the correct
connector.
I did this the first time in 1984 after being told you cant connect a
LP25
(Dataproducts I/F) to an 11/23... The bet was $1, I won. I still have
that
LAV-11 and the 11/23.
Allison
-----Original Message-----
From: Tony Duell <ard(a)p850ug1.demon.co.uk>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Thursday, October 25, 2001 5:22 PM
Subject: Re: first step getting VAX 6000-400 booted ...
>> I'm not Antonio or Allison, but I can answer this question. The "Data
Products"
>> parallel port works with printers with a "Data Products" parallel
interface. I've
>> used a couple of different printers with this interface. It's been a
while so I
>> can't remember the official name of the interface. The printers I
used were made
>> by Data Products and OEMed to other manufacturers (including DEC).
>
>IIRC, the Data Products interface is pretty similar to Centronics. I am
>working from a dim memory here, but it's something like either the
strobe
>or busy/ready, or both need to be inverted to link a Centronics printer
>to a Data Products host interface. You'll have to get the pinouts and
>match up signals, of course, but generally it can be got to work with
>only a couple of inverters.
>
>-tony
> > What's the deal with the BASIC in ROM on these machines? Any other
early
> > PeeCee's have this feature?
>
> It's standard Microsoft cassette BASIC. Similar to (say) TRS-80 CoCo
> BASIC.
>
> The true-blue IBM PC. PC/XT (and therefore PortablePC), PC/AT, PCjr, etc
> all have BASIC in ROM. I don't think it was ever licensed to clones, and
> I don't think any clone company ever wrote a ROM BASIC from scratch. So
> pretty much the only place you'll find it is in IBM machines.
Tony, I think you are correct as I've never seen a clone mb with BASIC in
ROM, but I *have* seen clone boards -- including early Pentium boards --
which would cough up "no rom basic" if they didn't find a bootable device.
Oddly enough the text of this message is always displayed in 40-column
low-res mode. Doesn't this suggest that part of the ROM BIOS code was
"borrowed" from early IBM code?
Glen
0/0
Hi guys,
Dunno if anyone can help here, but I was recently given a Tandberg TDC
3325 and some tapes. The guy who gave this to me had it working in a PC
with a SCSI controller running linux. I've not got any documentation for
this drive at all, so I'd like to know what the SW1 dipswitch sets (I've
worked out 1-3 are SCSI ID)
Now I'd like to use this drive in my MV3100 to backup the VMS 5.4
install before I ditch it and start over with VMS 7.x.
I put the drive in, and turned on the VAX - so far so good...
>>> show dev
VMS/VMB ULTRIX ADDR DEVTYP NUMBYTES RM/FX WP DEVNAM REV
------- ------ -------- ------ -------- ----- -- ------ ---
ESA0 SE0 08-00-2B-23-3D-21
DKA300 RZ3 A/3/0/00 DISK 121 MB FX RZ23L 252B
...HostID.... A/6 INTR
MKB400 TZ12 B/4/0/00 TAPE ........ RM ...........
...HostID.... B/6 INTR
>>>
It's picking up the drive then (I tried it as MKA400 too - same result)
So I start VAX/VMS 5.4 abd login as SYSTEM...
$ initialise mkb400: foo
%INIT-F-DRVERR, fatal drive error
$
It doesn't run the tape at all when I do this, only when you first
put the tape in. The activity LED comes on when you put a tape in, and
doesn't flicker.
I'm at a loss - could it be it's not 512 byte blocks? If so, can anyone
tell me how to change it.
I tried it on both SCSI channels, so it shouldn't be a termination issue.
Any ideas people?
--Matt
Richard Erlacher stated as follows:
> Joseph Kaye sprach thusly:
> > I got an Altos 586 from a friend a while ago, with an external 2400 baud
> > modem and a Wyse (50?) terminal. There were no Unix install disks
> > included. I am looking to reinstall the OS, does anyone know where I
> > could get a copy of the Xenix that it uses?
>
> Are you sure it uses XENIX? I gave one of these to Will Jennings, along
with
> the companion tape drive, a couple of years back. Perhaps he can help you.
There were Altos' that ran MP/M-II, and others than ran XENIX... ISTR
that the 586 was the squarish-box that ran MP/M-II, while the other
model that had a hi-techish, Datageneralish look to it ran XENIX.
We had both...
Regards,
-dq
Anyone out there own an ICL Perq?
Ive got one in storage, working last time I looked. Seem to be interesting
beasts, a small mini with a very early Unix (Release 3), bitmapped display,
'puck' pointing device and a primitive graphical interface. Possibly one of
the first bitmapped display Unixes?
Anyone have more info or history?
Cheers.
--
Mike McCauley mikem(a)open.com.au
Open System Consultants Pty. Ltd Unix, Perl, Motif, C++, WWW
24 Bateman St Hampton, VIC 3188 Australia http://www.open.com.au
Phone +61 3 9598-0985 Fax +61 3 9598-0955
Radiator: the most portable, flexible and configurable RADIUS server
anywhere. SQL, proxy, DBM, files, LDAP, NIS+, password, NT, Emerald,
Platypus, Freeside, TACACS+, PAM, external, Active Directory etc etc
on Unix, Win95/8, 2000, NT, MacOS 9, MacOS X
In a message dated 10/25/2001 2:12:40 PM Central Daylight Time,
ernestls(a)home.com writes:
<< -----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Mike Ford
Sent: Thursday, October 25, 2001 10:09 AM
To: classiccmp(a)classiccmp.org
Subject: Periodic rants on eBay
Love it or hate it, eBay is the most credible source of pricing or value
that I know of. Last night, really the past week, I have been digging
deeply into the purchases I have made in the last few months, and I found a
really cool looking box, HP SureStore 12000e. 10 minutes on the HP site,
and I knew all about the buttons on the front, but not what the damn thing
WAS. 2 minutes on eBay and I knew I had a nice 48 GB DDS tape array storage
thing worth $175 or so, that had drivers for windows etc. that I could
download for free (and had the links to do so in the eBay ad).
Yes, I agree about ebay being a knowledge base as well as a place to sell.
I've learned a lot from browsing through the ads, and it's also a good place
to see pictures of items that I'm curious about. Sure, most of the photos
are terrible but if all you want to do is see what something looks like,
then it's helpful.
About pricing though, it gives you a general idea of what something is worth
on the open market but it's also very much a hit and miss kind of thing. For
example, a while back I saw an Apple 3.5 unidisk drive sell for about
$100.00. Suddenly, five more drives appear from various sellers who see that
they have a hot item, and in essence the market is then flooded. That causes
the price to fall on drives offered after that. So what is the value of one
of those drives? Also, the more an items is listed (like an Apple IIe) the
better the statistical data becomes. Some will say that the value of an item
is exactly what someone will pay for it at a particular time, and that's
true but you can also say that generally speaking, an item's approximate
value is what people will likely pay for it. An Altair will likely sell for
more than $1000 but how much more? If I try to sell an Apple II clone on
ebay, one day it will go for $30 and the next it might go for $70.00
depending on who sees it. What is it's approximate value? If I start the
auction a $1.00, the bidding might end at $100.00 but if I start it at
$30.00, the auction might end at $32.00. >>
blech, can we not go into ebay arguments again? If anyone wants to rehash it,
go back and reread the archives. All I can say is prices vary widely. I've
sold similar junk only have something sell for a high price and then
something else go for much lower. People get ebay stupid and will overbid on
many things.
> > > XBI E
> > > 1+ DWMBA/B (2107) 000A
> > > 3+ DMB32 (0109) 0004
> > > 5+ CIBCA-B (0108) 41C2
> > > 6+ TBK70 (410B) 0307
>
> DMB32 8 x Serial for terms. Plus a couple of strange parallel ports on a
> single 50(?) pin d connector that I have never
> found anything compatible with. Someone suggested it was a "Data Products"
> Parallel port x 2, whatever that is.
> Antonio or Allison, either of you know what you can use with it?
I'm not Antonio or Allison, but I can answer this question. The "Data Products"
parallel port works with printers with a "Data Products" parallel interface. I've
used a couple of different printers with this interface. It's been a while so I
can't remember the official name of the interface. The printers I used were made
by Data Products and OEMed to other manufacturers (including DEC).
> CIBCA-B for speaking to HSC's or other CI equipped Vaxen. If you don't have
> a HSC, pull the cards, as some of your error msgs that are confusing the
> issue are coming from there. LEave the cab kit in in case you want to put
> them back later if you get something that speaks CI. (Caveat: If you do you
> MUST have a Star Coupler as well)
The CI will work with HSJ controllers as well. I agree that if you don't have
a StarCoupler then you'll want to remove the cards. Also, if you do ever get
CI storage, be careful with the CI cables. They can't be bent beyond a certain
radius or they'll break.
Also, if you do get any CI storage (or another node with CI), you may be tempted
to directly connect without a StarCoupler. Some people have gotten this to work,
but it is not recommended and can cause damage.
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Enthusiasts Club at http://www.dittman.net/
