> Seems a little less-likely to be the problem, given(?) as well that you have
> fairly consistent (is deterministic overstating it?) behaviour.
Yeah. We've gotten to the point now where enough layered problems have been
cleared away that the remaining behavior is quite deterministic.
> If
On 2/6/19 10:42 PM, Brent Hilpert via cctalk wrote:
> Well, maybe they changed the hinge design slightly for the model you're
> looking at.
> Here are some pics of the 7970A with the transport open at 90 deg:
> http://madrona.ca/tmp/HP7970A/hingeTop.jpg
>
On 2019-Feb-06, at 10:37 PM, Fritz Mueller via cctalk wrote:
>> 4116 datasheet specs 2mS, my calcs give a refresh period of 1.5mS, the
>> 14.5uS from the manual would give 1.86 mS, 7% shy of 2.
>> The schematic specs 1% resistors, and the parts list does appear to spec a
>> high-tolerance
On 2019-Feb-06, at 7:48 PM, Chuck Guzis via cctalk wrote:
> On 2/6/19 6:33 PM, Brent Hilpert via cctalk wrote:
>
>> Granted you could drill the holes from the rear of the flange,
>> however from what I can see the hinge design doesn't look like it
>> will allow the transport frame to swing far
> 4116 datasheet specs 2mS, my calcs give a refresh period of 1.5mS, the 14.5uS
> from the manual would give 1.86 mS, 7% shy of 2.
> The schematic specs 1% resistors, and the parts list does appear to spec a
> high-tolerance "1%200PPM" cap.
>
> Although there are the internal voltage divider Rs
On 2/6/19 6:33 PM, Brent Hilpert via cctalk wrote:
> Granted you could drill the holes from the rear of the flange,
> however from what I can see the hinge design doesn't look like it
> will allow the transport frame to swing far enough to clear access
> for the screwdriver shaft to tighten the
It looks like the question boils down to either "how did that part of
the binary get to that part of memory?", or "how did we end up
executing out of that part of memory?"
More the former, I think...
Noel, is it possible for you deduce where Unix _should_ be placing these
"bad" bits
> From: Fritz Mueller
> It looks like the question boils down to either "how did that part of
> the binary get to that part of memory?", or "how did we end up
> executing out of that part of memory?"
More the former, I think.
UISA0 contains 001614, and physical memory at 0161400
I'm wondering if anyone knows of any CP/M software using GSX-80, which
could be an interesting demo, or game. I have found Kasekastchen (
http://atariage.com/forums/topic/244781-kaesekaestchen-a-new-gsx-based-game-for-pcw-cpc-and-other-cpm-machines/)
(misspelled without accents to make the
> From: Jon Elson
> I'm thinking it is bad memory. ... I think it is just a bad memory chip
Nothing so simple, I'm afraid! The memory actually contains:
PA:171600: 016162 004767 000224 000414 016700 016152 016702 016144
and it's _supposed_ to be holding:
PA:171600: 110024 010400
On 2/6/19 6:25 PM, Jon Elson via cctalk wrote:
I'm thinking it is bad memory. It seems unlikely bus problems could
alter only ONE BIT per word, so I think it is just a bad memory chip,
and finding multiple words where the 01 bit is now turned on sure
looks like that kind of problem.
On 2019-Feb-06, at 4:19 PM, Chuck Guzis via cctalk wrote:
> On 2/6/19 2:29 PM, Brent Hilpert via cctalk wrote:
>
>> (I take it you mean "now look at the -left- side".)
>
> Well, you know, my *other* right... :)
>
>> However, looking at my 7970A, it appears you could separate the cast-Al
>>
On 02/06/2019 05:39 PM, Fritz Mueller via cctalk wrote:
On Feb 6, 2019, at 2:24 PM, Brent Hilpert via cctalk
wrote:
Is the schematic available for the memory board at-issue?
Curious myself to see what approach for refresh DEC used.
Yes, here:
On 02/06/2019 04:24 PM, Brent Hilpert via cctalk wrote:
On 2019-Feb-06, at 1:21 PM, Noel Chiappa via cctalk wrote:
From: Brent Hilpert
what about the refresh circuitry of the memory board?
...
It might also explain why a number of 4116s were (apparently) failing
earlier in the efforts ...
On 02/06/2019 12:53 PM, Noel Chiappa via cctalk wrote:
If so, i) we're down to one problem (good news), and our problem turns into
finding out how that section of the code got trashed (bad news).
I'm thinking it is bad memory. It seems unlikely bus
problems could alter only ONE BIT per
On 2019-Feb-06, at 5:29 PM, Paul Koning wrote:
>> On Feb 6, 2019, at 8:25 PM, Brent Hilpert via cctalk
>> wrote:
>> On 2019-Feb-06, at 5:11 PM, Fritz Mueller via cctalk wrote:
> On Feb 6, 2019, at 2:24 PM, Brent Hilpert via cctalk
> wrote:
>
> Is the schematic available for
On 2019-Feb-06, at 3:39 PM, Fritz Mueller wrote:
>> On Feb 6, 2019, at 2:24 PM, Brent Hilpert via cctalk
>> wrote:
>>
>> Is the schematic available for the memory board at-issue?
>> Curious myself to see what approach for refresh DEC used.
>
> Yes, here:
>
> On Feb 6, 2019, at 8:25 PM, Brent Hilpert via cctalk
> wrote:
>
> On 2019-Feb-06, at 5:11 PM, Fritz Mueller via cctalk wrote:
On Feb 6, 2019, at 2:24 PM, Brent Hilpert via cctalk
wrote:
Is the schematic available for the memory board at-issue?
Curious myself to
On 2019-Feb-06, at 5:11 PM, Fritz Mueller via cctalk wrote:
>>> On Feb 6, 2019, at 2:24 PM, Brent Hilpert via cctalk
>>> wrote:
>>>
>>> Is the schematic available for the memory board at-issue?
>>> Curious myself to see what approach for refresh DEC used.
>>
>> Yes, here:
>>
>> On Feb 6, 2019, at 2:24 PM, Brent Hilpert via cctalk
>> wrote:
>>
>> Is the schematic available for the memory board at-issue?
>> Curious myself to see what approach for refresh DEC used.
>
> Yes, here:
> http://bitsavers.trailing-edge.com/pdf/dec/pdp11/memory/MP00672_MS11L_engDrw.pdf
On 2/6/19 2:29 PM, Brent Hilpert via cctalk wrote:
> (I take it you mean "now look at the -left- side".)
Well, you know, my *other* right... :)
> However, looking at my 7970A, it appears you could separate the cast-Al
> transport frame from the chassis box
> by unscrewing the 4 exterior
Jack Harper wrote:
I got both drives into the rack this past weekend and I am an old guy
(67) - I carefully stared at the thing before I started and finally
figured out that I could, in fact, lift the drive from a waist high
cart for a few seconds, but definitely could not lift it or lower it
> On Feb 6, 2019, at 2:24 PM, Brent Hilpert via cctalk
> wrote:
>
> Is the schematic available for the memory board at-issue?
> Curious myself to see what approach for refresh DEC used.
Yes, here:
http://bitsavers.trailing-edge.com/pdf/dec/pdp11/memory/MP00672_MS11L_engDrw.pdf
There is
On 2019-Feb-06, at 12:24 PM, Chuck Guzis via cctalk wrote:
> On 2/6/19 11:25 AM, Jay West wrote:
>
>> Yes, it's all "standard 19 inch" but. the HP gear and mounting
>> kits of that time expected certain things to be present in the rack
>> design/construction well beyond just the space
On 2019-Feb-06, at 1:21 PM, Noel Chiappa via cctalk wrote:
>> From: Brent Hilpert
>
>> what about the refresh circuitry of the memory board?
>> ...
>> It might also explain why a number of 4116s were (apparently) failing
>> earlier in the efforts ... replacing them might have just replaced them
I an next door, give us the address please...
Thanks,
Randy
From: cctalk on behalf of Ali via cctalk
Sent: Wednesday, February 6, 2019 9:07 AM
To: 'General Discussion: On-Topic and Off-Topic Posts'
Cc: 'Electronics Plus'
Subject: RE: Another dealer going
This keyboard has now been sold!
Cindy Croxton
Electronics Plus
1613 Water Street
Kerrville, TX 78028
830-370-3239 cell
sa...@elecplus.com
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
On 2/6/19 1:23 PM, Tomasz Rola via cctalk wrote:
> On Wed, Feb 06, 2019 at 10:13:57PM +0100, Tomasz Rola via cctalk
> wrote: [...]
>> quite a few compilers in there:
>>
>> http://aminet.net/tree?path=dev
>
> And on page 1 of 5 in /dev/asm section I have spotted at least two
> disassemblers,
On Wed, Feb 06, 2019 at 10:13:57PM +0100, Tomasz Rola via cctalk wrote:
[...]
> quite a few compilers in there:
>
> http://aminet.net/tree?path=dev
And on page 1 of 5 in /dev/asm section I have spotted at least two
disassemblers, there might be more. Caution: never used any.
> From: Brent Hilpert
> what about the refresh circuitry of the memory board?
> ...
> It might also explain why a number of 4116s were (apparently) failing
> earlier in the efforts ... replacing them might have just replaced them
> with 'slightly better' chips, i.e. with a
I have a copy of the source for a set of 68k tools (compiler, assembler,
loader, etc)
which was based on work done by Chris Terman at MIT. This work was done back in
the mid 80s, so some work is likely needed to compile with modern tools. Let me
know if you would like a copy.
On 2/6/19 10:27 AM,
On Wed, Feb 06, 2019 at 06:44:27PM +0100, Götz Hoffart wrote:
> Hi,
>
> I could offer Lattice C 3 and 5 for 68k / Atari ST.
>
> Regards
> Götz
Lattice was the thing, back when I had Amiga. Too bad I could not
afford a harddisk :-).
BTW, I just recalled the Aminet is still there and seems to be
Hi,
I could offer Lattice C 3 and 5 for 68k / Atari ST.
Regards
Götz
... auf dem Sprung ...
> Am 06.02.2019 um 17:21 schrieb Tomasz Rola via cctalk :
>
>> On Wed, Feb 06, 2019 at 03:08:14PM +, Phil Pemberton via cctalk wrote:
>> Hi,
>>
>> I'm (still) trying to reverse-engineer a ton of
Leslie is preparing a list.
She has also contacted another friend who is quitting the biz, to see if
they want to get rid of equip.
Cindy Croxton
Electronics Plus
1613 Water Street
Kerrville, TX 78028
830-370-3239 cell
sa...@elecplus.com
---
This email has been checked for viruses
On 2019-Feb-06, at 10:53 AM, Noel Chiappa via cctalk wrote:
>
> I'm not sure that's going to tell us much: the latest development is that
> Fritz looked at the actual memory contents again, and it is once again
> trash; _almost_ identical to what was there before:
>
> PA:171600: 016162 004767
I know there's an old (I think) official Sega Genesis devkit that's,
erm, "around" on various console homebrew sites. No idea which exact C
compiler is included, but it's not too difficult to find.
On 2/6/19 11:25 AM, Jay West wrote:
> Yes, it's all "standard 19 inch" but. the HP gear and mounting
> kits of that time expected certain things to be present in the rack
> design/construction well beyond just the space between the vertical
> posts.
>
> As I recall, on the left, the flange
1 keyboard PN 3201072-01 still in plastic and foam (Type 5)
1 metallic type mousepad, never used
1 mouse 370-1170-01, used
1 cable 530-1594-01 used
1 cable 530-1662-01 new
1 cable 530-1442-02 used
1 battery holder that is plugged into the 530-1594-01, used, no battery
installed
These are
Pics of equipment on request.
Hi, we occasionally get some.
For example, we have the following:
2x Phones ROLM 61000 in boxes (see photos) ('86 year of manufacture); Bunch
of (see photos):
FAX-MODEM USRobotics 33.6K Model 0459 PN: 00083907
FAX-MODEM USRobotics
At 12:26 PM 2/6/2019, Ethan Dicks via cctalk wrote:
>OTOH, at home, I'd had an Amiga since 1986 and used a variety of
>native tools (Lattice C later SAS/C, and various assemblers either
>commercial or from a Fish Disk).
Somewhere I have the DOS-hosted C compiler for the Amiga that was part
of the
> From: Phil Pemberton
> * Anything not on this list ;)
The TRIX project at MIT-LCS did a 68K compiler very early on (soon after the
first 68K wa released)x, using Steve Johnson's Portable C Compiler as a base.
Noel
Chuck wrote...
--
The HP disk array rack is a pretty standard 19" EIA rack, with some extra slots
for mounting the disk drive slides.
Looking at the 7970, without the mounting kit, it's a standard 19" wide.
The right side flange has holes for mounting; the left side (the side with the
> From: Mattis Lind
>> we've also looked at what's in memory at that location, and the low
>> part of the text segment seems to be correct, but there was junk at
>> the top, around the target of the JSR (i.e. at 'csv'). Not just one
>> word, but everything around that location
On 2/6/19 10:09 AM, Jay West wrote:
> I have not looked at my 7970's in quite some time, but I had thought the
> previous discussion was for mounting the 7970's in an HP rack. Not all later
> HP racks, but the 2 or 3 series that were predominant around the time of the
> 7970's, had a very
Preowned Barcode Ltd
John Gallant
Halifax NS Canada
PH (902) 468 8210
Cell (902)719 6031
Email: sa...@preownedbarcode.com
This gent has stuff from the 80s and 90s in the barcode and scanner
departments.
Not affiliated with seller, etc.
Cindy Croxton
Electronics Plus
1613 Water
On Wed, Feb 6, 2019 at 10:27 AM Ethan Dicks wrote:
> On Wed, Feb 6, 2019 at 9:08 AM Phil Pemberton via cctalk
> wrote:
> > I'm (still) trying to reverse-engineer a ton of M68K ROM code which was
> > apparently compiled with a circa-1990 C compiler.
>
> > Does anyone have copies of any of the
Chuck's retension levers any chance this is on thingiverse or would you
be willing to send me the .stl file so I can 3dprint my own? :)
I have not looked at my 7970's in quite some time, but I had thought the
previous discussion was for mounting the 7970's in an HP rack. Not all later
HP
Last May Steve auctioned off the assets, and and printer/plotter co bought
the name and website. Steve retired to Hawaii. All is gone L
Cindy Croxton
Electronics Plus
1613 Water Street
Kerrville, TX 78028
830-370-3239 cell
sa...@elecplus.com
---
This email has been checked for
Phil
I doubt if its relevant but I think I have Sozobon C for the Atari. There
was also a Mark Williams "C"
https://en.wikipedia.org/wiki/Mark_Williams_Company
http://www.atari-forum.com/viewtopic.php?t=25148
and of course various GNU ports.
Dave
> -Original Message-
> From:
At 01:59 PM 2/5/2019, you wrote:
by my lonesome, I was determined not to repeat the process. The rack,
VTW, is from an old HP Storage Array, which has a nice anti-tip pullout
on the bottom.
I constructed a dolly for the HP drive that allows me to roll it around
where I need it. It's low enough
A Plus Computer Products
5115 N. Douglas Fir Road
Suite N
Calabasas, CA 91302
Leslie Foumberg, Owner
Leslie Foumberg [les...@apluscp.com]
You might try emailing her directly.
I have sent her an email letting her know she might start getting some
oddball requests. Also requested a spreadsheet of
At 06:53 PM 2/5/2019, you wrote:
Some years ago, Jay recommended a Genie Load Lifter to me (thank
you!), and I was fortunate enough to get two of them as "new old
stock" for about half price. They're relatively inexpensive and
absolutely invaluable. Put a 200lb unit into the top of a full
> Calabasas, CA
Well for a change it is someone just next door so I can definitely take a
look. I wonder if they have anything available. Do you have contact
info/address?
-Ali
>
> -Original Message-
> From: Ali [mailto:cct...@ibm51xx.net]
> Sent: Tuesday, February 05, 2019 2:57 PM
>
On Wed, Feb 6, 2019 at 9:08 AM Phil Pemberton via cctalk
wrote:
> I'm (still) trying to reverse-engineer a ton of M68K ROM code which was
> apparently compiled with a circa-1990 C compiler.
I used to do a lot of m68k ROM code development c. 1985-1993...
> Does anyone have copies of any of the
On Wed, Feb 06, 2019 at 03:08:14PM +, Phil Pemberton via cctalk wrote:
> Hi,
>
> I'm (still) trying to reverse-engineer a ton of M68K ROM code which
> was apparently compiled with a circa-1990 C compiler.
>
> Does anyone have copies of any of the following -- or any other C
> compilers for
On 2019-02-06 10:08, Phil Pemberton via cctalk wrote:
> Hi,
>
> I'm (still) trying to reverse-engineer a ton of M68K ROM code which was
> apparently compiled with a circa-1990 C compiler.
>
AT B1 UNIX?
And, we did at this time a lot on the OS/9 on microware. But I shink
there is still a
Hi,
I'm (still) trying to reverse-engineer a ton of M68K ROM code which was
apparently compiled with a circa-1990 C compiler.
Does anyone have copies of any of the following -- or any other C
compilers for the 68K which were around at that time?
* Sierra Systems 68000 C compiler (was
Hi,
I have looked into my PDP-8/a computers now. The small one have the
limited function board that you want. That is the machine that should be
identical to yours.
In my big PDP-8a/420 I have the same board as you have "have.jpg" but in
another revision (no IDC header connector, just the DIL
Hi Paul
I have put pictures of the boards here:
http://pdp8.se/slask/LFB
have.jpg is the board I have and want.jpg is the one
I'm looking for.
The identifying numbers are in aproximately the same
place. But you can clearly see that the "want" board
is much simplified and if I interpret the
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