"Bill Sudbrink" <bills(a)adrenaline.com> said:
> I brought this up some time ago, but never
> got a satisfactory answer...
>
> When I use the above combination (regardless
> of CPU board), while the system in general
> works fine, the deposit/examine functionality
> of the front panel stops working. Somebody
> said they knew of a fix, but then never posted
> anything else. I've looked at the schematics
> (I have them for both items) and can't for the
> life of me see anything that would conflict.
>
> Any help greatly appreciated.
Here is some of the IMSAI front panel gottas:
MWRITE pin 68 - This signal needs to be generated
by one source and one source only. It is generated
by the IMSAI front panel (by a deposit) so make
sure this signal is disabled on the CPU board when
used with the IMSAI front panel.
PROT & UNPROT pins 20 & 70 - The IEEE 696 standard
says that these pins will be at ground. Some
motherboards ground these lines. But grounding
these pins on the IMSAI front panel will disable
the front panel. To fix this, cut the traces,
on the front panel, right at edge connector
pin 20 and 70.
Data Out Bus - When the IMSAI front panel does
a deposit operation, it expects the the data
on the Data In Bus to be reflected on the
Data Out Bus. Some later CPU boards disabled
the Data Out Bus to cut down on bus noise
especially above 2MHz.
Regards,
--Doug
=========================================
Doug Coward
@ home in Poulsbo, WA
Analog Computer Online Museum and History Center
http://www.best.com/~dcoward/analog
=========================================
> Here is a link to a Compaq web site that lists VUP ratings:
Those aren't VUP ratings. It isn't even accurate, since the
heading is "VAX system performance comparison--performance listing"
and there are Alpha systems mixed in.
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Ethusiasts Club at http://www.dittman.net/
On September 20, Geoff Reed wrote:
> You know.... every time I see For Auction and rare in the same sentence, I
> want to flog the author with a coho salmon....
Kinky.
-Dave
--
Dave McGuire
Laurel, MD
This is semi-ontopic since I'm building the system to emulate a PDP-10.
Anyway I just got a pair of Intel D810EMO motherboards for free. I plan to
add a DIMM, CPU, small HD, and a PS. Probably won't even bother with a
case as I'd like to save space.
Anyway, it's been a long time since I had much to do with PC's I've got the
following questions.
Is a Pentium III 800EB and a 800B processor the same thing?
Can a Mac USB keyboard (from my G4/450) be used on a PC?
Zane
--
| Zane H. Healy | UNIX Systems Administrator |
| healyzh(a)aracnet.com (primary) | OpenVMS Enthusiast |
| | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| PDP-10 Emulation and Zane's Computer Museum. |
| http://www.aracnet.com/~healyzh/ |
Does anyone have a copy of CP/M TEX (preferably for CP/M-86)?
The manual is available form the usual places, unfortunately the binary
is not.
Thanks,
--
Steve Kostecke <steve(a)kostecke.net>
> > There are some inaccuracies, though. For instance, the /90 and /90A
> > are shown to have the same TPS, but the /90A is faster. The numbers
> > for the /90 and /90A are also wrong as far as I can tell (the numbers
> > more closely match what I first posted rather than what I determined
> > experimentally).
>
> One remark here. The TPS numbers not always seem to be "logical". Please
> notice,
> that a lot of the benchmark is influenced by the I/o & disk system. So a
> faster CPU not always
> has a better TPS number. You can see it many times if you really look
> into it.
That's true, but the /90A has quite a bit more cache, which should
influence the TPS rating.
> And, the 4000/90 & /90a are workstations. So TPS is not of so much value
> to this ...
>
> > There's also a lot of holes in the list.
>
> So fill them ;-)
I was planning on doing that in the next few days. Standardizing will
take a bit of work, though.
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Ethusiasts Club at http://www.dittman.net/
Hello Salo,
> is there any 3 BNC -> 5 BNC cable out there? maybe that would
> solve my problem.
I have never seen anything like this. While it is easy enough
to join two or three signals ( Software Integrators and Mirage,
the makers of Fixed Frequency Video Cards for PC's used to
do it by soldering a couple of resistors on the back of their
video cards, one from H to green, and the other from V to green,
taking care of sync type, while frequency timings were still taken
care of in their customized video bios's ), it would be way beyond
my ( practical only, and limited at that ) level of knowledge
to know how to strip the sync signals off the green line, and
individually separating them at that, to properly make that signal
into a separate sync video signal.
Sincerely,
Bennett
salo wrote:
>
> On Thu, Sep 20, 2001 at 02:41:17PM -0400, Info from LSI wrote:
> > If you don't mind experimenting, under the hood, and can do so
> > without electrocuting yourself, I believe on the left side of
> > the monitor you will find some adjustments, some of which might
> > be labeled, horizontal frequency, horizontal phase, horizontal
> > size, horizontal center, etc. You might try tweaking some of
> > those and seeing if that stabilizes the image.
>
> i tried these already. some little changes occur but nothing big and nothing
> which could indicate better state - just change. i do not think this is the
> way it will work.
>
> i am not familiar with so old monitors (i was 10 and knew nothing about any
> other hardware than PC and 8bits at the time it was constructed ;)) is there
> any 3 BNC -> 5 BNC cable out there? maybe that would solve my problem.
>
> > Or you might try a 5 BNC variety Sony multisync, just hooking
> > up R, G, and B.
> >
> > or if you have a multisync with a HD15M pigtail, I have hooked
> > these up by coming out of computers with BNC video out by
> > connecting to a BNC to HD15 cable hooked up so that the BNC's
> > are to the computer, then used a HD15F-HD15F gender changer to
> > join the BNC to HD15 cable to the monitor's HD15M pigtail.
>
> yes, i could use another monitor, but i want to use this one.. it is looking
> fine and i do not want to throw it out :(
>
> > Just some experimental options to possibly try.
>
> thanks anyway
>
> regards,
>
> --
> -- salo <salo(a)Xtrmntr.org> ASCII Ribbon campaign against /"\ --
> -- <salo(a)silcnet.org> e-mail in gratuitous HTML and \ / --
> -- Microsoft proprietary formats X --
> -- http://Xtrmntr.org/salo.pgp / \ --
Hi:
I came across on of these and don't know exactly what it is. It doesn't
look like any OScope that I've ever seen. Any HP gurus out there that
recognize it?
Rich
Rich Cini
Collector of classic computers
Build Master for the Altair32 Emulation Project
Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/
/************************************************************/
> At 12:08 PM 9/20/01, Emmanuel replied to my question with :
> >http://www.netbsd.org/Documentation/Hardware/Machines/DEC/vax/sections.html
> >;-)
>
> (the VAX hardware reference), however this reference is unreliable when it
> comes to VUPs ratings.
> Eric has confirmed that it was correct on the ones I asked about, we
> already had the 4000/100 vs 4000/90 vs 4000/700 discussions :-)
There are some inaccuracies, though. For instance, the /90 and /90A
are shown to have the same TPS, but the /90A is faster. The numbers
for the /90 and /90A are also wrong as far as I can tell (the numbers
more closely match what I first posted rather than what I determined
experimentally).
There's also a lot of holes in the list.
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Ethusiasts Club at http://www.dittman.net/
