Re: HP 16C Badge (logo)

[Raymond Wiker via cctalk]

> On 10 Jul 2020, at 21:21 , William Sudbrink via cctalk 
>  wrote:
> 
> This is not exactly vintage computer, but it is very close.  A friend just
> gave me an HP 16C calculator in excellent, working condition, EXCEPT the 16C
> badge (or logo if you prefer) is missing.  I seem to recall that, some years
> ago, someone on this list knew of a source for replacements but I can't find
> it in the archive.  So, I'll ask, does anyone know where to get a
> replacement 16C badge?
> 


There was an announcement on hpmuseum.org  some time 
back: https://www.hpmuseum.org/forum/thread-13014.html 
 

Small C ver 1.00 source?

[Will Cooke via cctalk]

I'm trying to find source files for the very first, original, ver 1.00(?) small 
C compiler.  I have the DDJ issue with the printed source (minus the assembly 
language runtime libs.)  I have found all sorts of derivative works, but I 
haven't found files of the original version.  My old eyes aren't up to typing 
in 13 pages of scanned copy of printed dot matrix listings.

Does anyone know where a downloadable copy of these files can be found?  Or 
have a copy they could send?

Thanks,
Will

"A designer knows he has achieved perfection not when there is nothing left to 
add, but when there is nothing left to take away." --  Antoine de Saint-Exupery


"The names of global variables should start with// "  -- https://isocpp.org

Re: Small C ver 1.00 source?

[Chuck Guzis via cctalk]

On 7/13/20 5:22 AM, Will Cooke via cctech wrote:
> I'm trying to find source files for the very first, original, ver 1.00(?) 
> small C compiler.  I have the DDJ issue with the printed source (minus the 
> assembly language runtime libs.)  I have found all sorts of derivative works, 
> but I haven't found files of the original version.  My old eyes aren't up to 
> typing in 13 pages of scanned copy of printed dot matrix listings.
> 
> Does anyone know where a downloadable copy of these files can be found?  Or 
> have a copy they could send?
> 
> Thanks,
> Will
> 
> "A designer knows he has achieved perfection not when there is nothing left 
> to add, but when there is nothing left to take away." --  Antoine de 
> Saint-Exupery
> 
> 
> "The names of global variables should start with// "  -- 
> https://isocpp.org
> 
  Isn't it on the DDJ Resource CD?

http://twimgs.com/ddj/sdmediagroup/images/sdm1123195158574/ddj_devnetwork_small_c.zip

--Chuck

Lear Siegler ADM-2?

[jackson22 via cctalk]

Hi everyone,


I’m currently looking for a Lear Siegler ADM-2 terminal to purchase from
someone for use in a future short film I’m creating. Afterwards I’d house
it in my personal museum.
If anyone has one or you know someone who owns one and could be interested
in selling, let me know. I’d pay very well. I could also do a trade, I have
quite a few rare terminals in my own collection. I’m familiar with old
computers and know how to work around them, it could be in any condition.
It would be in good hands.

You can also Email me at jacksonharringto...@gmail.com

Thanks.

TM848 repair?

[Jim Brain via cctalk]

Anyone on list repair or rehab Tandon TM848 drives?  I have a 4 or so of 
the slimline drives from some Tandy Model 12/16b units that don't seem 
to spin at all, and I've hooked them up to the same PSU that a TM848E 
successfully runs on, so I am guessing it's not a PSU issue. (Though, my 
understanding of 8" drives is extremely minimal, so...)


If I could get just 2 of them working, that'd put a few 12/16b units 
back in operation.


Jim

--
Jim Brain
br...@jbrain.com
www.jbrain.com

Re: TM848 repair?

[Mike Stein via cctalk]

Shouldn't be too difficult to troubleshoot; have you got the manual?

Start by checking the 24V > 12V regulator...

m

- Original Message - 
From: "Jim Brain via cctalk" 
To: "General Discussion: On-Topic and Off-Topic Posts" 
Sent: Monday, July 13, 2020 2:18 PM
Subject: TM848 repair?


> Anyone on list repair or rehab Tandon TM848 drives? I have a 4 or so of 
> the slimline drives from some Tandy Model 12/16b units that don't seem 
> to spin at all, and I've hooked them up to the same PSU that a TM848E 
> successfully runs on, so I am guessing it's not a PSU issue. (Though, my 
> understanding of 8" drives is extremely minimal, so...)
> 
> If I could get just 2 of them working, that'd put a few 12/16b units 
> back in operation.
> 
> Jim
> 
> -- 
> Jim Brain
> br...@jbrain.com
> www.jbrain.com
>

Re: TM848 repair?

[Chuck Guzis via cctalk]

On 7/13/20 11:18 AM, Jim Brain via cctalk wrote:
> Anyone on list repair or rehab Tandon TM848 drives?  I have a 4 or so of
> the slimline drives from some Tandy Model 12/16b units that don't seem
> to spin at all, and I've hooked them up to the same PSU that a TM848E
> successfully runs on, so I am guessing it's not a PSU issue. (Though, my
> understanding of 8" drives is extremely minimal, so...)
> 
> If I could get just 2 of them working, that'd put a few 12/16b units
> back in operation.

The Tandon 848 is not one of my favorite drives.  There is an option not
to pass the Motor On/ signal unless a disk is loaded and the drive door
is closed.  Check U16 pin 8, which should be high for MOTOR ON.

It seems more like an oversight that all 4 drives don't spin.  Be aware
that the 848's motor controls are different from 5.25", where one line
controls all motors.  The 848 uses pins 4,6,8 and 24 on the interface to
control the motor--each drive has a jumper that dictates which line will
be used. (MC 1-4).

--Chuck

Re: TM848 repair?

[Chuck Guzis via cctalk]

On 7/13/20 12:00 PM, Mike Stein via cctalk wrote:
> Shouldn't be too difficult to troubleshoot; have you got the manual?
> 
> Start by checking the 24V > 12V regulator...

Second that!  I've had to replace more than one regulator on 848s; also
the 100 ohm resistor (R1) and electrolytic capacitor(C6) on the input
side of the regulator.

--Chuck

Re: TM848 repair?

[Jim Brain via cctalk]

On 7/13/2020 2:00 PM, Mike Stein wrote:

Shouldn't be too difficult to troubleshoot; have you got the manual?

Start by checking the 24V > 12V regulator...


As for a manual, I have this:

https://www.scss.tcd.ie/SCSSTreasuresCatalog/hardware/TCD-SCSS-T.20141115.002/Tandon-TM848-Specification-and-Schematic.pdf

I don't see the VR section in that, though.

Re: TM848 repair?

[Jim Brain via cctalk]

On 7/13/2020 2:02 PM, Chuck Guzis via cctalk wrote:

On 7/13/20 11:18 AM, Jim Brain via cctalk wrote:

The Tandon 848 is not one of my favorite drives.  There is an option not
to pass the Motor On/ signal unless a disk is loaded and the drive door
is closed.  Check U16 pin 8, which should be high for MOTOR ON.

I will do so.


It seems more like an oversight that all 4 drives don't spin.  Be aware
that the 848's motor controls are different from 5.25", where one line
controls all motors.  The 848 uses pins 4,6,8 and 24 on the interface to
control the motor--each drive has a jumper that dictates which line will
be used. (MC 1-4).


Yep, one of the drives was set to DS2, so I moved it back to DS1 so I 
could test as a primary drive.  I agree the drives would be different 
from 5.25" ones, but I connected them to the same PSU that runs my 
TM848E successfully.  It seems strange that a working PSU that drives a 
TM848E would not supply enough or the right voltage for a TM848-02.


Jim

Re: TM848 repair?

[Chuck Guzis via cctalk]

On 7/13/20 12:18 PM, Jim Brain via cctalk wrote:
> On 7/13/2020 2:00 PM, Mike Stein wrote:
>> Shouldn't be too difficult to troubleshoot; have you got the manual?
>>
>> Start by checking the 24V > 12V regulator...
> 
> As for a manual, I have this:
> 
> https://www.scss.tcd.ie/SCSSTreasuresCatalog/hardware/TCD-SCSS-T.20141115.002/Tandon-TM848-Specification-and-Schematic.pdf
> 
> 
> I don't see the VR section in that, though.

If it's the same document that I have, PDF page 18, second-to-last page
of schematics, near the bottom, near the legend "DC POWER CONNECTOR"

--Chuck

Re: Small C ver 1.00 source?

[Phil Budne via cctalk]

I can't make ANY assertions about version or pedigree of the files
(which came to me in 1981 when I was using a PDP-10), but they APPEAR
to be from Ron Cain himself, from SRI-KL (TOPS-20):

ftp://ftp.ultimate.com/pdp10/c80.tar.gz

Which contains runtime files from November 1979, and compiler files
dated June 1981.

Re: Small C ver 1.00 source?

[Will Cooke via cctalk]

> On July 13, 2020 at 10:57 AM Chuck Guzis via cctech  
> wrote:
> 
> On 7/13/20 5:22 AM, Will Cooke via cctech wrote:> I'm trying to find source 
> files for the very first, original, ver 1.00(?) small C compiler. I have the 
> DDJ issue with the printed source (minus the assembly language runtime libs.) 
> I have found all sorts of derivative works, but I haven't found files of the 
> original version. My old eyes aren't up to typing in 13 pages of scanned copy 
> of printed dot matrix listings.
> > Does anyone know where a downloadable copy of these files can be found? Or 
> > have a copy they could send?
> > Thanks,Will
> > "A designer knows he has achieved perfection not when there is nothing left 
> > to add, but when there is nothing left to take away." -- Antoine de 
> > Saint-Exupery
> > 
> > "The names of global variables should start with // " -- 
> > https://isocpp.orgIsn't it on the DDJ Resource CD?
> http://twimgs.com/ddj/sdmediagroup/images/sdm1123195158574/ddj_devnetwork_small_c.zip
> --Chuck

Unfortunately, no.  That was one of the first places I looked.  They have the 
2.1 version from the Small C handbook (James Hendrix) and some other 
derivatives, but not the original 8080 version 1.0.

Thanks,
Will

Re: Small C ver 1.00 source?

[Chuck Guzis via cctalk]

On 7/13/20 10:07 AM, Will Cooke via cctech wrote:

> Unfortunately, no.  That was one of the first places I looked.  They have the 
> 2.1 version from the Small C handbook (James Hendrix) and some other 
> derivatives, but not the original 8080 version 1.0.
> 
> Thanks,
> Will

SIMTEL20 claims to have 1.1, but I don't know how it differs.

--Chuck

Re: Small C ver 1.00 source?

[Will Cooke via cctalk]

> On July 13, 2020 at 1:17 PM Chuck Guzis via cctech  
> wrote:
> 
> On 7/13/20 10:07 AM, Will Cooke via cctech wrote:
> > Unfortunately, no. That was one of the first places I looked. They have the 
> > 2.1 version from the Small C handbook (James Hendrix) and some other 
> > derivatives, but not the original 8080 version 1.0.
> > Thanks,WillSIMTEL20 claims to have 1.1, but I don't know how it differs.
> --Chuck

Hi Chuck,
Thanks.  I found the one(s) on Simtel and they weren't the right ones.  I 
"think" the 1.1 that is on there is for the IBM PC  (8088) or maybe the Z-80.   
In any case, I think it's been found.

Thanks for helping.
Will

Re: Small C ver 1.00 source?

[Chuck Guzis via cctalk]

All I've been able to find is the source for 1.1 on github, which was
laboriously reconstructed from an OCR of the original article.

--Chuck

Re: Small C ver 1.00 source?

[Will Cooke via cctalk]

> On July 13, 2020 at 1:30 PM Phil Budne  wrote:
> 
> I can't make ANY assertions about version or pedigree of the files(which came 
> to me in 1981 when I was using a PDP-10), but they APPEARto be from Ron Cain 
> himself, from SRI-KL (TOPS-20):
> ftp://ftp.ultimate.com/pdp10/c80.tar.gz
> Which contains runtime files from November 1979, and compiler filesdated June 
> 1981.


Hi Phil,
Thanks!  That sure looks like the right one.  It is 8080 code, the comments and 
docs mostly match what is published from a quick look.  I will look into it 
more when I am home and have some time.  But I do believe that is the 
"original" as published in DDJ.

Notes and justification
I started looking for this mainly because I wanted to play with it.  I want to 
actually use it to write some code and see how hard it is to write usable code 
with the limited subset of the earliest released version.  But when I started 
looking I was shocked that I couldn't find the original.  There are dozens, at 
least, of derivatives in various versions.  Z80, 8088, 6502!, TI 9900 I think 
and more.  Floating point, structs, optimizers, etc.  I personally think this 
was a VERY important piece of software.  I think the number of derivatives 
speaks volumes of how important it was.  But I couldn't find the original.  I 
feel it should be preserved.  Even the DDJ Small C CD ROM didn't have it!  
(They only used 34Megs of the Disk so they had plenty of room.)  
Anyway, it looks like Phil found it.  I appreciate all the efforts getting it.
Does anyone have any suggestions as to where it should go for safekeeping?  I 
plan on putting it on my web site, but that is far from an archival solution.

Thanks,
Will

Re: Small C ver 1.00 source?

[Chuck Guzis via cctalk]

On 7/13/20 11:59 AM, Will Cooke via cctech wrote:

> Thanks.  I found the one(s) on Simtel and they weren't the right ones.  I 
> "think" the 1.1 that is on there is for the IBM PC  (8088) or maybe the Z-80. 
>   In any case, I think it's been found.
> 

The github one:

https://github.com/trcwm/smallc_v1

is the 8080 version, 1.1 and claims to be a transcription from the
original DDJ article.

--Chuck

Re: Small C ver 1.00 source?

[Will Cooke via cctalk]

> On July 13, 2020 at 2:13 PM Chuck Guzis via cctech  
> wrote:
> 
> On 7/13/20 11:59 AM, Will Cooke via cctech wrote:
> > Thanks. I found the one(s) on Simtel and they weren't the right ones. I 
> > "think" the 1.1 that is on there is for the IBM PC (8088) or maybe the 
> > Z-80. In any case, I think it's been found.The github one:
> https://github.com/trcwm/smallc_v1
> is the 8080 version, 1.1 and claims to be a transcription from theoriginal 
> DDJ article.
> --Chuck


Thanks, Chuck,
It's interesting I didn't find that one.  There are various others on Github 
but I didn't see that one.  I will do a file comparison between that one and 
the one Phil provided.

Thanks,
Will

Re: Small C ver 1.00 source?

[ben via cctalk]

On 7/13/2020 1:20 PM, Will Cooke via cctalk wrote:

It's interesting I didn't find that one.  There are various others on Github but I 
didn't > see that one.  I will do a file comparison between that one and the 
one Phil provided.

Thanks,
Will



I have modified copy for the IBM PC, by CAPROCK SYSTEMS,
but ALAS can't find the orginal source.
Anything after 1.1 8080 has the switch statement and the weird P-code?
Ben.

Re: Small C ver 1.00 source?

[Will Cooke via cctalk]

> On July 13, 2020 at 3:38 PM ben via cctalk  wrote:
> 
> On 7/13/2020 1:20 PM, Will Cooke via cctalk wrote:> It's interesting I didn't 
> find that one. There are various others on Github but I didn't > see that 
> one. I will do a file comparison between that one and the one Phil provided.
> > Thanks,WillI have modified copy for the IBM PC, by CAPROCK SYSTEMS,but ALAS 
> > can't find the orginal source.Anything after 1.1 8080 has the switch 
> > statement and the weird P-code?Ben.

Hi Ben,
I'm pretty sure I have the source now for the one published in DDJ.  I've got 
two sources to compare.  (Someone sent me the CAPROCK SYSTEMS one off list)

It appears that there is no coordination of version numbers after 1.0 up to 
2.1.  It seems there are completely different versions/modifications with the 
same version number (e.g. 1.1).  Various versions in the 1.x line have all 
sorts of mods.  Many of them are native code, but may be for 8080, 8086, Z80, 
6502, or various others.  Not sure when or where the p-code came in.  2.1 was 
the updated "official" version published by James Hendrix in "The Small C 
Handbook" as well as in DDJ, I believe.  After 2.1 it diverges again, I think.  
Ver 2.1 has the for, switch, etc stuff added and appears to be the most common. 
 All this is from my digging and I'm certainly not an expert.

Thanks for helping,
Will

Re: TM848 repair?

[Mike Stein via cctalk]

- Original Message - 
From: "Chuck Guzis via cctalk" 
To: "Jim Brain via cctalk" 
Sent: Monday, July 13, 2020 3:29 PM
Subject: Re: TM848 repair?


> On 7/13/20 12:18 PM, Jim Brain via cctalk wrote:
>> On 7/13/2020 2:00 PM, Mike Stein wrote:
>>> Shouldn't be too difficult to troubleshoot; have you got the manual?
>>>
>>> Start by checking the 24V > 12V regulator...
>> 
>> As for a manual, I have this:
>> 
>> https://www.scss.tcd.ie/SCSSTreasuresCatalog/hardware/TCD-SCSS-T.20141115.002/Tandon-TM848-Specification-and-Schematic.pdf
>> 
>> 
>> I don't see the VR section in that, though.
> 
> If it's the same document that I have, PDF page 18, second-to-last page
> of schematics, near the bottom, near the legend "DC POWER CONNECTOR"
> 
> --Chuck



Which document is that? I find it on PDF page 85 of the OEM Operating and 
Service Manual TM-848-1 and TM-848-2 Disk Drives, Sheet 4 of 5.

m

Re: TM848 repair?

[Jim Brain via cctalk]

On 7/13/2020 2:29 PM, Chuck Guzis via cctalk wrote:


If it's the same document that I have, PDF page 18, second-to-last page
of schematics, near the bottom, near the legend "DC POWER CONNECTOR"

--Chuck


Eyesight is failing. I had the same doc.

--
Jim Brain
br...@jbrain.com
www.jbrain.com

Re: TM848 repair?

[Jim Brain via cctalk]

On 7/13/2020 2:11 PM, Chuck Guzis via cctalk wrote:

On 7/13/20 12:00 PM, Mike Stein via cctalk wrote:

Shouldn't be too difficult to troubleshoot; have you got the manual?

Start by checking the 24V > 12V regulator...

Second that!  I've had to replace more than one regulator on 848s; also
the 100 ohm resistor (R1) and electrolytic capacitor(C6) on the input
side of the regulator.

--Chuck


Thanks for the tip.  On one, the 10ohm (yep, 10) is cooked, so I need to 
get another one.  Looks like 1/2W, but anyone know for sure?  The 
schematic just notes the resistance and identifier.  It could be 1W...


The other 1 I have on the bench looks to have a good resistor, but I 
will check the VR next.


Jim

--
Jim Brain
br...@jbrain.com
www.jbrain.com

Re: TM848 repair?

[Jim Brain via cctalk]

On 7/13/2020 3:57 PM, Mike Stein via cctalk wrote:



As for a manual, I have this:

https://www.scss.tcd.ie/SCSSTreasuresCatalog/hardware/TCD-SCSS-T.20141115.002/Tandon-TM848-Specification-and-Schematic.pdf


I don't see the VR section in that, though.

If it's the same document that I have, PDF page 18, second-to-last page
of schematics, near the bottom, near the legend "DC POWER CONNECTOR"

--Chuck



Which document is that? I find it on PDF page 85 of the OEM Operating and 
Service Manual TM-848-1 and TM-848-2 Disk Drives, Sheet 4 of 5.


It's the first one I linked (above).  It looks to be an older manual.  I 
agree the one you linked has more information, so I grabbed both.


Jim

Getting files off a 7300

[Chris Zach via cctalk]

Anyone know the best way to get files off an AT&T 7300/3B1 computer? 
This one has a lot of Perq stuff in a directory as well as hilarious 
things you can do with RP06 disk platters (ah, when we were young...)


It does have an AUI Ethernet port on the back, but doesn't appear to 
have TCP/IP installed. Maybe I can install TCP and find my old Synoptics 
10bt to AUI adapter?


CZ

Re: TM848 repair?

[Jim Brain via cctalk]

On 7/13/2020 2:11 PM, Chuck Guzis via cctalk wrote:

On 7/13/20 12:00 PM, Mike Stein via cctalk wrote:

Shouldn't be too difficult to troubleshoot; have you got the manual?

Start by checking the 24V > 12V regulator...

Second that!  I've had to replace more than one regulator on 848s; also
the 100 ohm resistor (R1) and electrolytic capacitor(C6) on the input
side of the regulator.

--Chuck


You, my good man, need some funds.  I will send funds so you can grab a 
beer or something!


The one unit has a bad resistor (need to order), while the other has a 
shorted C6 (temp replaced with a radial cap while I order one of those.  
That one boots now.


I was dreading trying to debug these things, and no doubt they won't all 
be this easy, but some early success foes wonders for confidence to 
continue.  Thanks for the help!


Jim


--
Jim Brain
br...@jbrain.com
www.jbrain.com

Re: TM848 repair?

[Chuck Guzis via cctalk]

On 7/13/20 2:05 PM, Jim Brain via cctalk wrote:
 --Chuck
> 
> Thanks for the tip.  On one, the 10ohm (yep, 10) is cooked, so I need to
> get another one.  Looks like 1/2W, but anyone know for sure?  The
> schematic just notes the resistance and identifier.  It could be 1W...

Given the power consumption (up to 1.2A) on the 24V line, I'd play it
safe and go with 2W.

--Chuck

Re: Getting files off a 7300

[Bill Gunshannon via cctalk]

On 7/13/20 6:12 PM, Chris Zach via cctalk wrote:
Anyone know the best way to get files off an AT&T 7300/3B1 computer? 
This one has a lot of Perq stuff in a directory as well as hilarious 
things you can do with RP06 disk platters (ah, when we were young...)


It does have an AUI Ethernet port on the back, but doesn't appear to 
have TCP/IP installed. Maybe I can install TCP and find my old Synoptics 
10bt to AUI adapter?




Didn't it have one serial port?  Kermit"

bill

Re: TM848 repair?

[Chuck Guzis via cctalk]

On 7/13/20 3:23 PM, Jim Brain via cctalk wrote:

> You, my good man, need some funds.  I will send funds so you can grab a
> beer or something!
> 
> The one unit has a bad resistor (need to order), while the other has a
> shorted C6 (temp replaced with a radial cap while I order one of those. 
> That one boots now.
> 
> I was dreading trying to debug these things, and no doubt they won't all
> be this easy, but some early success foes wonders for confidence to
> continue.  Thanks for the help!

Don't mention it--happy to help out!

--Chuck

Re: TM848 repair?

[Jim Brain via cctalk]

On 7/13/2020 5:23 PM, Chuck Guzis via cctalk wrote:

On 7/13/20 2:05 PM, Jim Brain via cctalk wrote:
  --Chuck

Thanks for the tip.  On one, the 10ohm (yep, 10) is cooked, so I need to
get another one.  Looks like 1/2W, but anyone know for sure?  The
schematic just notes the resistance and identifier.  It could be 1W...

Given the power consumption (up to 1.2A) on the 24V line, I'd play it
safe and go with 2W.

--Chuck

I also am at a loss on the 4u7 cap.  The one I am replacing is a black 
unit with a tapered + end, but I am not finding exact duplicate.


Will this work:

https://www.digikey.com/product-detail/en/nte-electronics-inc/NEH4-7M50AA/2368-NEH4-7M50AA-ND/11644580


--
Jim Brain
br...@jbrain.com
www.jbrain.com

Re: TM848 repair?

[Jim Brain via cctalk]

On 7/13/2020 6:10 PM, Chuck Guzis via cctalk wrote:

Don't mention it--happy to help out!


I am especially impressed, for a few reasons.  Backstory:

 * I snagged 2 Model 12s at a CoCoFEST! a number of years ago during
   the show auction.  NO KBs
 * I then spent too much I am sure buying extra boards from a chap
   outside Atlanta who seemed to have sold these units for years.
 * Peter Cetenski was gracious enough to get me a few bootable floppies
   to try.
 * Then, when picking up the Atlanta parts in Chicago (they came via
   someone's back seat, I by plane), Jason Timmons loaded me up with
   more Model II stuff (external drive, front bezels, and a few Model
   IIs, including a batch of KBs.
 * Finally, at Tandy Assembly 2018, I picked up 2 external HDDs for not
   much coin)
 * But, I have been sitting on all this collection in unusable form
   since then.  It's taking up valuable space and I know I don't need
   it all, so I really need to get the units working I want, and then
   move the rest to a new home.
 * Still, all of the units collectively seemed a daunting task,
   especially in light of my not knowing anything about the platform. I
   don't even know how to list a dir in TS-DOS 2.0a (or whatever it is
   called).  LS-DOS uses dir, so there's that.

Of the 4 units, 1 requires a new resistor (well, at least 1 new 
resistor), 2 were bad caps (now booting), and 1 has a good mech (swapped 
logic board with another one), but the logic board has another issue.  
Resistor is good, cap is good, and VR is outputting 11.9VDC.  The 
stepper moves when booted, and the drive motor also looks to be running 
well.  I can see the LED showing the index pulses, but not sure where I 
should start (I have it sitting in a working mech, so I know all mech is 
at least marginally OK (was booting from the mech with another logic board).


Jim

--
Jim Brain
br...@jbrain.com
www.jbrain.com

Sun E250, NVRAM edit? (Serial Speeds, no console, etc)

[Ethan O'Toole via cctalk]

Hello,

  I have an E250 Sun that belonged to a friend that passed away around 
2008. It was colocated at a colocation office I had running in Virginia 
Beach.


  I pulled it out of storage, and would like to check if his public 
website is archived on it. Archive.org only has bits of it. Odds are low 
since it wasn't the main server, but worth a shot.


  I tried the usual Serial port A, but all I get is garbage. Tried all the 
common baud rates I could think of. If it's switched to diag mode, the 
diag stuff comes across in 9600bps.


  I tried the RSC port, it wants a password. Don't know it, didn't see 
anywhere online on how to reset it.


  I tried hooking up a console. Finally get the power brick in for the 
Samsung 770TFT LCD monitor I've held onto (it has 13w3.) At first it 
wasn't working. Tried both Type 5 and type 6 keyboards attached. No 
console.


  I found by removing the NVRAM, it will finally throw console. But no 
keyboard input. Stop-A, nothing. If I shove the NVRAM back in while it's 
running it immediatley goes black.


  Anyone know if the NVRAM strings are stored in plaintext in the NVRAM 
IC? If I were to dig out all the hardware that should be able to dump that 
chip is it something that is human readable / editable? I've done the 
coin cell hack on them before, but from memory the keyboard worked and it 
wasn't a big deal to do program in replacement MAC. But this is different, 
I need options removed.


  I'm thinking this thing has values in the NVRAM that are turning off the 
console and doing something funky to the serial baud rate. Or perhaps the 
baud rate in Solaris is set to something funky.


- Ethan

Re: TM848 repair?

[Chuck Guzis via cctalk]

On 7/13/20 4:58 PM, Jim Brain via cctalk wrote:
> On 7/13/2020 5:23 PM, Chuck Guzis via cctalk wrote:
>> On 7/13/20 2:05 PM, Jim Brain via cctalk wrote:
>>   --Chuck
>>> Thanks for the tip.  On one, the 10ohm (yep, 10) is cooked, so I need to
>>> get another one.  Looks like 1/2W, but anyone know for sure?  The
>>> schematic just notes the resistance and identifier.  It could be 1W...
>> Given the power consumption (up to 1.2A) on the 24V line, I'd play it
>> safe and go with 2W.
>>
>> --Chuck
>>
> I also am at a loss on the 4u7 cap.  The one I am replacing is a black
> unit with a tapered + end, but I am not finding exact duplicate.
> 
> Will this work:
> 
> https://www.digikey.com/product-detail/en/nte-electronics-inc/NEH4-7M50AA/2368-NEH4-7M50AA-ND/11644580

Yes, that will work, but so will almost any garden-variety electrolytic
rated at 35-50WVDC.  The cap doesn't handle any AC--it's there mostly to
keep the voltage regulator from oscillating.

--Chuck

A tool many of you may make find useful!

[Dave Dunfield via cctalk]

Continuing to let you all know about developments, I do expect that
many of you are facing a similar
problem - trying to condense and preserve a lifetime of "collecting
digital stuff".

The DFF utility has been very helpful, however once I started
organizing my files, I realized that although
there are a lot of duplication, much of it is was downloaded at
different times and/or from different sites making much of it
different, many vendors don't go out of their way to make file
content/purpose obvious
in the names, and many files are dependent on other files - so
manually reorganizing the data is NOT
always easy.

The best solution I have come up with so far is to invent a new
archive format designed to eliminate
duplicate data but capable of recreating the entire original directory
trees (or parts thereof).  To that end
I created the two utilities described below (now included in the web
archive).  -- yeah, I do seem to have a
fair bit of spare time on my hands these days...

;=BDA - Build Dave's Archive
;=EDA - Extract Dave's Archive
  Dave's Archives contain the smallest possible representation of a complete
  directory tree:
   - Only one copy of the data for duplicate files is stored.
   - Duplicate filenames are stored only once.
   - Path information is stored only once per directory, and only additions
 to a path are stored (adding/removing from last path).
  eg: Starting with a large DIR of support files for one of my systems. This
  has duplicates and a lot of pre-compressed install files:
314 dirs, 930 files using 3,762,691,033 bytes.
  Just "ZIP"ing it I get: SysSupt.zip 3,352,081,951 bytes
  7zip does a bit better: SysSupt.7z  3,245,871,362 bytes
  Running BDA, I get:
SysSupt.DA1 9,404 bytes
and SysSupt.DA2 1,912,855,711 bytes
  Big improvement, but no compression yet, using ZIP and 7zip I get:
SysSupt.zip 1,636,965,417 bytes
and SysSupt.7z  1,609,663,862 bytes
  And YES, using ZIP/7zip to extract the .DA's, then EDA gives me a directory
  with exactly the same content that I started with.

Like my other tools, these can deal with BIG directory trees, and the
output file format is well documented
should you ever want to recover the files by other means.

Sorry if I've not responded to messages here, tend not to follow the
list directly much these days due to the high content, but you can
always reach me through the link on my site - might take me a few days
to respond, but I do get to it from time to time...

Dave
-- 
--
Personal site: http://dunfield.maknonsolutions.com
--

Re: Getting files off a 7300

[Phil Budne via cctalk]

UUCP?

Re: Getting files off a 7300

[Ethan Dicks via cctalk]

On Mon, Jul 13, 2020 at 11:12 PM Phil Budne via cctalk
 wrote:
> UUCP?

Definitely a good method, especially if you don't have Kermit already.

-ethan

Re: Getting files off a 7300

[Chris Zach via cctalk]

That's A surprisingly good idea. I used a 7300 with uucico back in 
the 80's to route mail along with my Pro/350 running Venix to Yafc and 
the internet. I wonder if I can still do it.


One oddity: The system came up but was faulting out on ports tty1 and 2. 
Editing /etc/inittab fixed that, but the system *does* have a two serial 
port card expansion module. Wonder if the modules have to be in specific 
slots or something...


C

On 7/13/2020 11:21 PM, Ethan Dicks wrote:

On Mon, Jul 13, 2020 at 11:12 PM Phil Budne via cctalk
 wrote:

UUCP?


Definitely a good method, especially if you don't have Kermit already.

-ethan

Re: Getting files off a 7300

[Chris Zach via cctalk]

Now that I think about it, I could probably make a tarball, use uuencode 
to turn it 7 bit, then cat it, then use uudecode on a mac to turn it 
back into a tarball.


Always a way to do something. Time to raid the pdp11 for some null modem 
gear...


On 7/13/2020 11:21 PM, Ethan Dicks wrote:

On Mon, Jul 13, 2020 at 11:12 PM Phil Budne via cctalk
 wrote:

UUCP?


Definitely a good method, especially if you don't have Kermit already.

-ethan

Re: Small C ver 1.00 source?

[Grant Taylor via cctalk]

On 7/13/20 1:06 PM, Will Cooke via cctech wrote:
Does anyone have any suggestions as to where it should go for 
safekeeping?


Some combination of Internet Archive, BitKeepers, and TUHS would be my 
minimum recommendation.


As you say, it's small.  It wouldn't be hard to hold on to.



--
Grant. . . .
unix || die

Re: Getting files off a 7300

[Grant Taylor via cctalk]

On 7/13/20 9:12 PM, Phil Budne via cctalk wrote:

UUCP?


I'm glad that someone else said UUCP.  I was thinking UUCP.



--
Grant. . . .
unix || die

Re: Small C ver 1.00 source?

[ben via cctalk]

On 7/13/2020 6:14 PM, Grant Taylor via cctalk wrote:

On 7/13/20 1:06 PM, Will Cooke via cctech wrote:
Does anyone have any suggestions as to where it should go for 
safekeeping?


Some combination of Internet Archive, BitKeepers, and TUHS would be my 
minimum recommendation.


As you say, it's small.  It wouldn't be hard to hold on to.



Well you need to add a (compiler) executable file, and a linker and a 
assembler. Source code is still easy to find, but system

software is a pain to find. You can't call Microsoft up and ask
for 8 or 16 bit software any more. 90% of the  DOS archives are gone. dd 
is also a handy thing to have on a PC.


Under DOS BOX I use small C 2.2 to compile small C 1.1.
The assembler and linker I use, just have ample memory for the
symbol tables so you can't make big changes.
Ben.