On Nov 29 2004, 0:18, Tony Duell wrote:
> Pete Turnbull wrote:
> > Sounds like mine. The one I have is a replacement, but almost
> > identical to the one my Dad bought in the mid-60s. It's about
115mm
> > wide x 55mm thick x 200mm long; it has three DIN sockets on the
>
> > panel. It takes five C-size cells. It originally came with a
slightly
>
> Yes. You could also feed in 7.5V through one of the sockets -- it was
a
> '240 degree' DIN socket used for external power, remote control, and
> monitoring earphone. One thing I must do is make a little adapter
with a
> power connector and a remote control socket wired to a suitable plug.
That's the one. I use that for power and remote from the Beeb.
> Ah, I was wondering if it would work with a Beeb... Mine alsoe needs
new
> drive belts, but otherwise is still operational. I have the schematic
> from the appropriate year of 'Radio and Television Servicing',
although
> sometimes oen was folded up inside the machine anyway.
I had to replace the drive belt in mine a few years back. I got a belt
>from CPC for a few pence.
--
Pete Peter Turnbull
Network Manager
University of York
Anyone else find that QFP-socketed chips in late 80's / early 90's
equipment are *really* prone to corroding and needing re-seating?
I've just had to re-seat several on this NCR Tower which were the cause
of all sorts of problems - yet I don't normally find that DIL chips need
any re-seating on equipment of this sort of age.
(I *think* QFP's the proper name - commonly used for 80186 / 80188 /
80286 chips, which have flat leads underneath the device)
Anyway, I now have a working NCR machine that chucks out more heat than
a small furnace and makes the lights go dim :-) (well, almost!)
cheers
Jules
>From: "Jules Richardson" <julesrichardsonuk(a)yahoo.co.uk>
>
>
>Anyone else find that QFP-socketed chips in late 80's / early 90's
>equipment are *really* prone to corroding and needing re-seating?
>
>I've just had to re-seat several on this NCR Tower which were the cause
>of all sorts of problems - yet I don't normally find that DIL chips need
>any re-seating on equipment of this sort of age.
>
>(I *think* QFP's the proper name - commonly used for 80186 / 80188 /
>80286 chips, which have flat leads underneath the device)
>
>Anyway, I now have a working NCR machine that chucks out more heat than
>a small furnace and makes the lights go dim :-) (well, almost!)
>
>cheers
>
>Jules
>
>
Hi
As usual, I will note here the virtues of using DC#4
silicon grease on the contacts to improve conductivity
and hold off corrosion.
Dwight
Hi Lawrence,
I know your post about the little electronic MECOS device you found in a box of junk is 2 years old, but do you still have it? A friend's father-in-law has such a thing that he's been wearing around his neck and swears it keeps him healthy. (We're not sure how.) It's wearing out and he wants a new one. If yours is still working, would you be willing to part with it?
Alison
A lot of class X1 supression caps seem to be self-destructing in vintage
equipment these days. I've got one in my NCR needing replacement, plus
we have an HP 3000, two Apple Lisas and an Apple /// all needing them
too... (they don't half smoke when they let go too :)
Looking around, it seems that everywhere these days sells class X2 caps,
and Y2(X1) caps. What's the modern-day replacement for a dead X1 cap?
X2, Y2(X1), or something else entirely?
I'm sure I've seen Y2 caps in old equipment as being a different thing
to X1, which is why I'm getting confused if they're now classed as the
same!
(Anyone have a source for 0.68uF X1 caps in the UK? Seems to be a very
uncommon value for supression caps - everyone does 0.47uF and then 1uF)
ta
Jules
I guess this confirms the rumor of Acclaim going belly up...
I just received an auction notification for Acclaim Entertainment in
Austin, Texas. I don't know if there will be any classiccmp related bits
for sale, but I thought at the very least folks here would want to know
about it. Inspection/Preview is Dec 13th, and the auction is on the 14th
and 15th. This looks like a huge auction compared to some of the large
foreclosure auctions I've been to in Texas.
See http://www.flsauction.com/ and http://www.shattuck.com/ for more info.
-Toth
I'm trying to do the same thing with some (downloaded) Teledisk images for an Altos 580 server which has a similar 96tpi floppy with no luck (a plea for help here).
My limited understanding is that these drives use double density media and that a standard 1.2 mb drives don't work too well with that (the manuals all say that writing out 360k AKA 40 track disks on a 1.2mb is a bad thing). Did you take the drive in the SB180 and put it in the Compaq, still calling it a 1.2, 360k or even a 720k 3.5? I tried that with a different (SA-465) 96tpi drive jumpered as drive 1 and it seemed to write disks with no reported problems on the Teledisk write. The Altos still didn't like the disk though but that might be a function of the original files (or something else I forgot to do).
Gary F.
------Oiginal below edited for brevity.-----
Message: 6
Date: Wed, 24 Nov 2004 19:48:18 -0500
From: "Richard A. Cini" <rcini(a)optonline.net>
Subject: RE: Making CP/M disk images
To: "'Dwight K. Elvey'" <dwight.elvey(a)amd.com>, "'General Discussion:
On-Topic and Off-Topic Posts'" <cctalk(a)classiccmp.org>
Message-ID: <000801c4d288$74daad50$6501a8c0@bbrk0oksry5qza>
Content-Type: text/plain; charset=us-ascii
Dwight:
Interestingly, Teledisk did skip every other track. These are DSDD disks
formatted on the SB180 machine using the "40 track" option. The drive in the
SB180 is a 96TPI drive (HD) and the disk on the PC side is a standard 1.2mb.
I'll have to see if Teledisk has any options that may address this. As I
recall, the number of configurable options was sparse, though.
This e-mail and any attachments may contain confidential and privileged information. If you are not the intended recipient, please notify the sender immediately by return e-mail, delete this e-mail and destroy any copies. Any dissemination or use of this information by a person other than the intended recipient is unauthorized and may be illegal. Unless otherwise stated, opinions expressed in this e-mail are those of the author and are not endorsed by the author's employer.
I'm finally getting around to trying to do something with my PDP-11/23
system and am having trouble creating bootable RT-11 V5 disks. I have
an RX02 drive and a set of RX01 distribution disks. I've tried booting
disk 1 of the RX01 distribution and that fails. Should I be able to
boot an RX01 on an RX02 drive? Also, I've tried copying disks using:
COPY/WAIT/OUTPUT:DY1: DY0:
and then
COPY/BOOT DY1:RT11FB.SYS DY1:
Unfortunately, that doesn't result in a bootable disk. In fact, when I
did it, it trashed the system disk in DY0 even though I removed it
before and replaced it with the source disk of the copy. Does this
sound like I've got a broken drive? I seem to be able to read either
RX01 disks or RX02 disks in DY1 without any problem. Also, the copy I
made in the first step above seems to be okay. It's just that I can't
boot the disk after the second COPY/BOOT step.
What dumb thing am I doing wrong?
Thanks,
David Betz
