On Thu, Feb 03, 2022 at 06:06:10PM +, Peter Coghlan via cctalk wrote:
> Today I finally managed to check it out. The ceramic F4A mains input fuse
> beside the power switch on the back panel had blown. When I opened it up,
> I found a POWER-ONE MAP80-4000 power supply. The main chopper transi
If it's only got 18 pins (per the subject line) then I don't think it
can be a 27S29. Based on the label my guess would have been a PAL/GAL
of some kind, but I can't immediately think of any standard parts that
would have had less than 20 pins there either...
p.
On Mon, Jun 01, 2020 at 02:55:03P
On Sat, May 02, 2020 at 10:22:02AM -0700, Alan Perry via cctalk wrote:
> >sc0 at vme24d16 20 vec 0x40
> >sd0 at sc0 slave 0
> >si0: sc_cmd: scsi bus continuously busy
> >sc0: resetting scsi bus
> >sd1 at sc0 slave 1
Not that I know these particular devices, but is it at all possible one
of
On Thu, 2019-03-28 at 17:02 +, Phil Blundell via cctalk wrote:
> I'll see if I can locate my unit later and confirm that.
FWIW...
https://photos.app.goo.gl/2mohWXwcdBS8uE9T9
p.
On Thu, 2019-03-28 at 09:43 -0700, Al Kossow via cctalk wrote:
> Does anyone have a working Apollo 3C505 ISA ethernet board handy to look at?
I have a 3c505 somewhere but I don't think it is an Apollo one.
The Linux kernel configuration help message from that era read:
tristate "Apollo 3
On Mon, 2019-03-18 at 13:03 +0100, GerardCJAT via cctalk wrote:
> The TECHNICAL problem : I am repairing a not so old electric typewriter.
> I need to replace what I call : a flexible printed circuit ( strip / ribbon /
> what's the "correct" word ??? ) *** AND *** the associated connector
> I sea
On Fri, 2018-12-07 at 14:18 -0500, Paul Koning via cctalk wrote:
> Does a plain LCD panel have delay? If not, what about a TV used as a
> monitor?
Depends what you mean by a "plain LCD panel". If you mean the glass
itself, no, they generally scan synchronously to the input signal and
don't have
On Tue, 2018-04-03 at 21:07 +0100, Ian Frost via cctalk wrote:
>
> Recently booted up my B&W Powermac G3, all came up fine including the
> 17” CRT monitor. However after a second or so, the
> monitor gives a ‘popping’ sound and the image on the screen expands
> then shrinks. This repeats every fe
On Mon, 2018-01-29 at 16:06 -0500, David Bridgham via cctalk wrote:
> For those of you who are following along with our QSIC project, today
> we
> booted v6 Unix successfully for the first time. We'd first tried
> this a
> week or two back but discovered that Unix does use partial block
> reads
>
On Mon, 2018-01-08 at 09:13 -0600, John Welch via cctech wrote:
> Does anyone know this board? I think it may be a SCSI controller. I
> cannot tell if it is Unibus or Qbus.
According to:
http://www.dilog.com/unibus.html
it's:
SU723A
SCSI, TMSCP, 7drives, Quad Height.
and (judging from the URL
On Fri, 2017-10-27 at 13:38 -0700, Brent Hilpert via cctalk wrote:
> I wonder if they were just trying to draw an analogy between the
> inherent dynamic operation requirements of magnetic logic and the
> dynamic operation requirements of some (many?) NMOS designs (not
> really inherent to NMOS).
O
On Mon, 2017-10-23 at 20:14 -0500, Jules Richardson via cctalk wrote:
> There appears to be a photo of the internals here, if that helps at
> all:
>
> http://museum.ipsj.or.jp/computer/device/magnetic_disk/images/0011_03
> _l.jpg
>
> ... it's a little small, so hard to tell what's going on for su
On Mon, 2017-10-23 at 21:45 +0100, Rob Jarratt via cctalk wrote:
> I am now looking at the H7826 PSU that came with a TURBOchannel
> Extender. It
> looks like there may have been capacitor leakage and some heatsinks
> will
> need to be replaced. I have posted pictures here:
>
>
>
> https://robs
No, that was what I was thinking of with the "some sort of latch"
comment. Where is the head lock?
Thanks
Phil
On Mon, 2017-10-23 at 10:19 -0500, Tom Uban wrote:
> I assume you've released the head lock?
>
> On 10/21/17 1:31 PM, Phil Blundell via cctalk wrote:
>
Anybody familiar with the internals of these disks? I have one here
which seems to have the positioner stuck at track zero. I'm not sure
whether it's likely to be just a bit sticky and in need of some
assistance or whether there is some sort of latch involved, and I am a
bit reluctant to just pul
On Thu, 2017-10-05 at 11:50 -0700, Chuck Guzis via cctalk wrote:
>
> What I found curious was the CDC manual that called SCSI "SASI
> subset".
> To me that says that SASI was the more elaborate protocol and SCSI
> initially picked and chose from it.
I think that's just bad/ambiguous wording and t
On Tue, 2017-10-03 at 18:56 +0100, Pete Turnbull via cctalk wrote:
> So there's clear proof that at least three companies in the UK were
> using the term IDE before (or at least by) 1990. I never heard it
> called anything else in that timeframe.
That pretty much matches my recollection also.
On Tue, 2017-09-26 at 14:19 -0400, Ethan via cctalk wrote:
> I don't know if it's a good idea to low level format a drive or not.
Low-level formatting (which, at the time, was just called "formatting")
used to be quite a routine operation on ST-506 MFM and RLL hard disks.
They usually came comple
On Fri, 2017-08-04 at 15:04 -0400, Noel Chiappa via cctalk wrote:
>
> And this path allowed us to get rolling without having to go through
> the PC-board fab cycle... (including the complexity of doing boards
> with gold fingers).
Just as an aside on that, I doubt you really need the hard gold fi
On Fri, 2017-08-04 at 09:17 -0800, David Bridgham via cctalk wrote:
>
So my question is: do industrial SD cards exist?
Yes they do. Most of the big card manufacturers have an "industrial"
range, for example:
https://www.sandisk.co.uk/oem-design/industrial/industrial-cards
There are also specia
On Fri, 2017-08-04 at 07:20 -0700, Al Kossow via cctalk wrote:
>
> Can you actually buy SATA PHYs in small quantities now
> or even SATA to PATA bridges?
I can't think of anybody who makes discrete SATA PHYs, and there isn't
a standardized interface for the other side of the PHY so I suspect
ther
On Fri, 2017-08-04 at 08:53 -0400, Noel Chiappa via cctalk wrote:
>
> But are SD cards really that unreliable?
It depends on exactly how you measure "reliable". There are a few
different things going on, and it differs from one SD card to another.
Firstly, there are multiple types of flash mem
On Fri, 2017-07-28 at 18:04 +0100, Rob Jarratt via cctalk wrote:
> Anyone have any thoughts on whether those data signals look right?
It doesn't look obviously wrong. If the vertical scale is 2V per box
then the amplitude is probably about right for 74LS logic. I think you
said this was on a sha
On Sun, 2017-05-21 at 10:08 +0100, Aaron Jackson via cctalk wrote:
> I won't post it again to avoid spamming people, but just one reminder
> to
> say that the below still available. I did have some interest from
> abroad
> but shipping would be far too expensive and difficult.
I'd be interested if
On Thu, 2017-02-02 at 17:25 +, Bill Gunshannon wrote:
>
> What version of GCC is being used here? I thought they removed
> support for the PDP-11 more than a deacde ago.
GCC does still have a pdp11 backend today. It doesn't seem to be very
actively maintained, and how well it works nowadays
On Sat, 2017-01-14 at 08:48 +, Rob Jarratt wrote:
> Has anyone had experience of using an item like this for soldering
> and PCB
> inspection work?
>
>
>
> https://www.amazon.co.uk/AmScope-Widefield-Binocular-Inspection-Micro
> scope/d
> p/B005C75IVM/ref=sr_1_fkmr0_1?ie=UTF8
Yes, I have on
On Fri, 2017-01-13 at 11:18 -0500, Paul Koning wrote:
> >
> Just yesterday I was looking at roughly the opposite question: how to
> make a DVD (in the USA) that my sister in Holland would be able to
> use. The impression I got is that PAL DVD players will usually
> accept NTSC DVDs, and modern PA
On Fri, 2017-01-13 at 08:38 -0500, Noel Chiappa wrote:
> > From: William Degnan
>
> > some are made to handle both pal and ntsc automatically. ...
> not sure
> > if they still do all that for LCD tv's but why not?
>
> Well, one thing most LCD's don't handle is interlaced video, so tha
On Fri, 2017-01-13 at 05:47 -0500, Corey Cohen wrote:
> So I have a friend who is originally from the U.K. He has his old
> BBC micro from when he was a kid and wants to be able to use it here
> in the states. His parents threw out his old TV in the U.K.
>
> Is there a way to use a BBC Micro
On Wed, 2016-08-17 at 16:59 -0500, j...@cimmeri.com wrote:
> Hi, Chuck. Excellent question -- and they do respond per your minimum, but
> beyond that, I'm not sure.
What device type do they report to IDENTIFY? There were some early tape
drives which presented as direct-access (not sequential-ac
On Thu, 2016-07-21 at 17:20 +0200, Liam Proven wrote:
> On 21 July 2016 at 16:45, Lars Brinkhoff wrote:
> > I have both the ARM and the 6502 instruction sets very fresh in my mind
> > right now. I don't see how the ARM could be a 6502 knockoff, even
> > without that sauce. Care to explain in mor
31 matches
Mail list logo
