Re: Getting files off a 7300--Mission accomplished

[Chris Zach via cctalk]

Working on it. Question: Was the 67mb drive in a 7300/3B1 a miniscribe 6085?

C

On 7/20/2020 2:58 PM, Ian Finder via cctalk wrote:

I may be able to track down floppies for 7300 TCP, if we can confirm it is
extinct in the wild...

On Mon, Jul 20, 2020 at 1:31 AM Al Kossow via cctalk 
wrote:


On 7/19/20 12:42 PM, Chris Zach via cctalk wrote:


Now I have a big crate with "Convergent technologies" sitting in my

truck, I'll have to figure that one out next. Also more Perq manuals and

floppy disks.


Probably a miniframe or mightyframe, considering the 7300 is a Convergent
machine under the ATT badge.

Could you tell if TCP/IP is installed, since it has the rare Ethernet card
in it.

I don't know if 7300 TCP software is archived anywhere.

Re: Getting files off a 7300--Mission accomplished

[Chris Zach via cctalk]

That could be helpful. There seems to be a need for it (at least one), 
and it's going to take awhile to sift thorough everything to find all 
the disks.


Also I'm wondering if this system had a 70mb disk originally and was 
replaced with a 40mb disk from another 7300. That could explain why the 
TCP drivers are not on it, they might be on a crashed disk somewhere in 
that pile of stuff.


Dig we must...

CZ

On 7/20/2020 2:58 PM, Ian Finder via cctalk wrote:

I may be able to track down floppies for 7300 TCP, if we can confirm it is
extinct in the wild...

On Mon, Jul 20, 2020 at 1:31 AM Al Kossow via cctalk 
wrote:


On 7/19/20 12:42 PM, Chris Zach via cctalk wrote:


Now I have a big crate with "Convergent technologies" sitting in my

truck, I'll have to figure that one out next. Also more Perq manuals and

floppy disks.


Probably a miniframe or mightyframe, considering the 7300 is a Convergent
machine under the ATT badge.

Could you tell if TCP/IP is installed, since it has the rare Ethernet card
in it.

I don't know if 7300 TCP software is archived anywhere.

Re: Getting files off a 7300--Mission accomplished

[Ian Finder via cctalk]

I may be able to track down floppies for 7300 TCP, if we can confirm it is
extinct in the wild...

On Mon, Jul 20, 2020 at 1:31 AM Al Kossow via cctalk 
wrote:

> On 7/19/20 12:42 PM, Chris Zach via cctalk wrote:
>
> > Now I have a big crate with "Convergent technologies" sitting in my
> truck, I'll have to figure that one out next. Also more Perq manuals and
> > floppy disks.
>
> Probably a miniframe or mightyframe, considering the 7300 is a Convergent
> machine under the ATT badge.
>
> Could you tell if TCP/IP is installed, since it has the rare Ethernet card
> in it.
>
> I don't know if 7300 TCP software is archived anywhere.
>
>
>
>
>

Re: Fan problem with DEC H7822 power supply in MicroVAX 3100

[Peter Coghlan via cctalk]

On 07/20/2020 10:55 AM, Peter Coghlan via cctalk wrote:
>
> I was thinking about wiring them to 5V because it was only 
> marginally
> overheating after running for a long time.  However, I 
> started
> poking around with the multimeter and discovered a low 
> resistance

> across one of the connectors for the fans.  This led me to a
> 1N759A 12V 400mW zener diode which read about 20 Ohms in both
> directions.  Looking at the H7821, there was a 1N4742 12V 
> 1W zener
> diode in a similar position.  It had much more plausable 
> readings
> so I borrowed it and fitted it to the H7822 in place of 
> the dud
> 1N759A.  The fans are spinning nicely now with about 7.5 
> to 8V
> across each one.  This was a lot easier than I was 
> expecting :-)

>
Wow, lucky it didn't smoke anything.  there must be a series 
resistor somewhere that probably got pretty hot.




It looks like the zener is connected between the adjust terminal
of a heatsink mounted LM337T adjustable negative voltage regulator
and the positive connection to one of the fans.  Also connected
to the adjust terminal is what looks like a thermistor mounted on
the heatsink of a MBR3045, presumably a switching transistor.
Perhaps the zener didn't end up carrying much current, however if
that is the case, it is a bit strange that it failed.

Regards,
Peter Coghlan.



Jon

windows program to read papertape from reader through serial port

[Bill Degnan via cctalk]

Hi - I read on teraterm's forum or something like it that teraterm is not
really equipped to receive an inbound papertape reader dump into an ascii
file.  What do those of you who have both windows and a tape reader use?
RealTerm?  If so, what settings?  I have been wresting with this for a
while...I am told my DSI NC 2400 needs hardware flow control
Thanks
BIll

Re: Interested in Microport 286 System V?

[Al Kossow via cctalk]

On 7/20/20 9:43 AM, Cameron Kaiser via cctalk wrote:

Hi, Warren. We've spoken a few times through the decades, but a have a
friend with a delightful relic of PC Unix history: the original 286 UNIX
port, well before SCO with Xenix.
Bela is in Mountain View, CA so he's on the wrong continent for you, but I
figured you might know of an appropriate home for this.


Bela Lubkin


Waait. Is this somehow related to the Armory?



I know Bela, and will be picking it up from him tonight

Re: Fan problem with DEC H7822 power supply in MicroVAX 3100

[Jon Elson via cctalk]

On 07/20/2020 10:55 AM, Peter Coghlan via cctalk wrote:


I was thinking about wiring them to 5V because it was only 
marginally
overheating after running for a long time.  However, I 
started
poking around with the multimeter and discovered a low 
resistance

across one of the connectors for the fans.  This led me to a
1N759A 12V 400mW zener diode which read about 20 Ohms in both
directions.  Looking at the H7821, there was a 1N4742 12V 
1W zener
diode in a similar position.  It had much more plausable 
readings
so I borrowed it and fitted it to the H7822 in place of 
the dud
1N759A.  The fans are spinning nicely now with about 7.5 
to 8V
across each one.  This was a lot easier than I was 
expecting :-)


Wow, lucky it didn't smoke anything.  there must be a series 
resistor somewhere that probably got pretty hot.


Jon

Re: Interested in Microport 286 System V?

[Cameron Kaiser via cctalk]

> > Hi, Warren. We've spoken a few times through the decades, but a have a
> > friend with a delightful relic of PC Unix history: the original 286 UNIX
> > port, well before SCO with Xenix.
> > Bela is in Mountain View, CA so he's on the wrong continent for you, but I
> > figured you might know of an appropriate home for this.
>
> Bela Lubkin

Waait. Is this somehow related to the Armory?

-- 
 personal: http://www.cameronkaiser.com/ --
  Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckai...@floodgap.com
-- Two can live as cheaply as one, for half as long. --

Re: Fan problem with DEC H7822 power supply in MicroVAX 3100

[Peter Coghlan via cctalk]

Jon Elson wrote:

On 07/20/2020 07:00 AM, Peter Coghlan via cctalk wrote:
> I have a MicroVAX 3100 which has a H7822 power supply.  The power supply
> and the machine itself mostly work (there is a problem with the SCSI
> interfaces but that's another story) except that the two fans in the
> power supply don't run.  If left on for a long time, the machine gets
> too hot and a thermal trip operates, shutting it down.
>
> The fans are DC 12V 0.2A and if I connect them to +5V or +12V, they
> work fine and don't draw excessive current so there would seem to be
> a problem with the section of the power supply which drives the fans.
> Unfortunately, it's operation is not obvious and the power supply is
> a pig to work on.
Yes, it probably has a temperature sensor and a fan speed 
controller.  If you don't care about noise, you

could probably just rewire the fans to 12 V directly.



I was thinking about wiring them to 5V because it was only marginally
overheating after running for a long time.  However, I started
poking around with the multimeter and discovered a low resistance
across one of the connectors for the fans.  This led me to a
1N759A 12V 400mW zener diode which read about 20 Ohms in both
directions.  Looking at the H7821, there was a 1N4742 12V 1W zener
diode in a similar position.  It had much more plausable readings
so I borrowed it and fitted it to the H7822 in place of the dud
1N759A.  The fans are spinning nicely now with about 7.5 to 8V
across each one.  This was a lot easier than I was expecting :-)



Jon

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

[Ethan O'Toole via cctalk]

In theory console can be set to anything but its usually 9600/8/n/1 as 
I’m sure you’ve tried.


Oh yea, I see the diags at that speed but everything else is noise. Memory 
is kind of hazy since it was 2008 era, but back then I had a Livingston 
Portmaster PM-25 hooked to all the colo hosts and I seem to recall this 
Sun box never working right. But the owner had it working over ethernet 
and didn't care.


I spent all weekend camping / diving so I didn't get back to it. But going 
to try to dump the contents of the NVRAM into a file to back it up. Then I 
will see if things are plain text or not. If not, maybe try all FF's so I 
have a working NVRAM to satisfy it. If it is text, there is definitely a 
checksum as I recall. But maybe I can just nuke out the serial console 
statement (graphics console disable), and then it will complain about a 
checksum mismatch but continue to go?


With the NVRAM out I get graphics console but can never type and it seems 
to halt.




On some suns unplugging the serial cable is the equivalent of sending a break, 
so might be worth a try?
Suns do require full hardware signalling on the console connection so might be 
worth checking.


Hmm I tried sending hard breaks via Putty / Hyperterminal. I was using an 
older Dell laptop with a physical RS232 port on it (not USB dongle.) But I 
will try that. Also I can't remember how the serial port A works with 
regards to the lights out management port? That serial data is somehow 
split between the two?


I will definitely mess with it this week. Motivation is high to get it 
working then find it and the ultra 5 a home.


Thanks for the reply! Will poke then report back.

- Ethan


--
: Ethan O'Toole

Re: Interested in Microport 286 System V?

[Bob Smith via cctalk]

Bela Lubkin

We have a winner! Al Kossow does want it -- he didn't say whether for
Bitsavers or Computer History Museum...
2 · Like · React · Reply · More · Yesterday at 4:53 AM
Warner Losh replied · 3 replies

On Mon, Jul 20, 2020 at 4:11 AM Robert Lipe via cctalk
 wrote:
>
> Hi, Warren. We've spoken a few times through the decades, but a have a
> friend with a delightful relic of PC Unix history: the original 286 UNIX
> port, well before SCO with Xenix.
>
> Bela is in Mountain View, CA so he's on the wrong continent for you, but I
> figured you might know of an appropriate home for this.
>
> https://m.facebook.com/story.php?story_fbid=3516115585074301=10276824078&_rdr
>
>
> Thanks for all you've done to preserve UNIX.
>
> RJL

Re: Fan problem with DEC H7822 power supply in MicroVAX 3100

[Jon Elson via cctalk]

On 07/20/2020 07:00 AM, Peter Coghlan via cctalk wrote:

I have a MicroVAX 3100 which has a H7822 power supply.  The power supply
and the machine itself mostly work (there is a problem with the SCSI
interfaces but that's another story) except that the two fans in the
power supply don't run.  If left on for a long time, the machine gets
too hot and a thermal trip operates, shutting it down.

The fans are DC 12V 0.2A and if I connect them to +5V or +12V, they
work fine and don't draw excessive current so there would seem to be
a problem with the section of the power supply which drives the fans.
Unfortunately, it's operation is not obvious and the power supply is
a pig to work on.
Yes, it probably has a temperature sensor and a fan speed 
controller.  If you don't care about noise, you

could probably just rewire the fans to 12 V directly.

Jon

Re: Getting files off a 7300--Mission accomplished

[Chris Zach via cctalk]

And one big binder (8.5*11) called Reference Manual which seems to have 
all the theory of operation and whatnot.


C

On 7/20/2020 10:31 AM, Chris Zach via cctalk wrote:

Let's see. Key floppies I have right now include:

System Software V 3.51 EIA RAM Combo board expansion disk
Tape backup Diagnostics
Tape backup system drivers
Tape backup 1.0
Telephone manager disk
Communications patch
Async Terminal Emulation disk

In the back of the owner's manual there are two disks GSS drivers, 1 and 2

And two oddballs
Encryption set version 3.51 1 of 2
Encryption set version 3.51 2 of 2

For Ethernet I have a red book with the Enhanced TCP/IP WIN/3B user's 
guide and Enhanced TCP/IP Win 3B Lan Interface programmer's reference 
manual. And the TCP/IP Administrator's guide. No floppies unfortunately.





On 7/20/2020 4:20 AM, Al Kossow via cctalk wrote:

On 7/19/20 12:42 PM, Chris Zach via cctalk wrote:

Now I have a big crate with "Convergent technologies" sitting in my 
truck, I'll have to figure that one out next. Also more Perq manuals 
and floppy disks.


Probably a miniframe or mightyframe, considering the 7300 is a 
Convergent machine under the ATT badge.


Could you tell if TCP/IP is installed, since it has the rare Ethernet 
card in it.


I don't know if 7300 TCP software is archived anywhere.

Re: Getting files off a 7300--Mission accomplished

[Chris Zach via cctalk]

Let's see. Key floppies I have right now include:

System Software V 3.51 EIA RAM Combo board expansion disk
Tape backup Diagnostics
Tape backup system drivers
Tape backup 1.0
Telephone manager disk
Communications patch
Async Terminal Emulation disk

In the back of the owner's manual there are two disks GSS drivers, 1 and 2

And two oddballs
Encryption set version 3.51 1 of 2
Encryption set version 3.51 2 of 2

For Ethernet I have a red book with the Enhanced TCP/IP WIN/3B user's 
guide and Enhanced TCP/IP Win 3B Lan Interface programmer's reference 
manual. And the TCP/IP Administrator's guide. No floppies unfortunately.





On 7/20/2020 4:20 AM, Al Kossow via cctalk wrote:

On 7/19/20 12:42 PM, Chris Zach via cctalk wrote:

Now I have a big crate with "Convergent technologies" sitting in my 
truck, I'll have to figure that one out next. Also more Perq manuals 
and floppy disks.


Probably a miniframe or mightyframe, considering the 7300 is a 
Convergent machine under the ATT badge.


Could you tell if TCP/IP is installed, since it has the rare Ethernet 
card in it.


I don't know if 7300 TCP software is archived anywhere.

Re: Getting files off a 7300--Mission accomplished

[Chris Zach via cctalk]

It did not seem to work and ping from the command line was not found. So 
it might not be on there.


That said I picked up a bunch of manuals and one of them was on TCP for 
the 7300 (red ATT manual). Maybe some floppy disks in there. I'll also 
keep an eye out for loose 5.25 floppies if this is that rare (have 
focused on 8 inch as they seem to be the ones for the Perqs)


C


On 7/20/2020 4:20 AM, Al Kossow via cctalk wrote:

On 7/19/20 12:42 PM, Chris Zach via cctalk wrote:

Now I have a big crate with "Convergent technologies" sitting in my 
truck, I'll have to figure that one out next. Also more Perq manuals 
and floppy disks.


Probably a miniframe or mightyframe, considering the 7300 is a 
Convergent machine under the ATT badge.


Could you tell if TCP/IP is installed, since it has the rare Ethernet 
card in it.


I don't know if 7300 TCP software is archived anywhere.

Fan problem with DEC H7822 power supply in MicroVAX 3100

[Peter Coghlan via cctalk]

I have a MicroVAX 3100 which has a H7822 power supply.  The power supply
and the machine itself mostly work (there is a problem with the SCSI
interfaces but that's another story) except that the two fans in the
power supply don't run.  If left on for a long time, the machine gets
too hot and a thermal trip operates, shutting it down.

The fans are DC 12V 0.2A and if I connect them to +5V or +12V, they
work fine and don't draw excessive current so there would seem to be
a problem with the section of the power supply which drives the fans.
Unfortunately, it's operation is not obvious and the power supply is
a pig to work on.  It consists of two double sided PCBs connected by
short leads and having live parts on both boards making it difficult
to get access to both sides of the board where the fan circuit is when
the power is on.

I don't have an identical working power supply to compare the faulty
one to but the fan circuit looks superficially similar to the one in
the H7821 which I do have working examples of so that may be a way
to proceed.

Does anyone have a service manual for the H7822 or H7821 or know how
the fan circuit is supposed to work in these power supplies?

Regards,
Peter Coghlan.

Re: Anyone out there that can read 7 track / 556 BPI tapes?

[ED SHARPE via cctalk]

there was a  7970b hp tape drive that  was  7  track drive  at one  tine  I  
had  the  fortune  to get one that  came  from a 2000 system that  wrote 
telemetry  from crash dummies and found  a  good  customer   for it.   all  
that  aside...   it would interface   with  an hp 2100  or  21mx  if  you  can  
find  one  it  will probably  work  and  work  well as all the  7970  series  
tape  drives served us  wonderfully. Nowwish  I  has  saved it...  but...at 
the  tie   the money  paid  for  that  parts  2000 system We got  plus  a 
number of  months  rent  for the business  ca. 1981 and  most important  that  
2000  donor  system gave  us  an XYD   board  for the  core array  that  a 
month  later we needed when one of ours  croaked Ed#   SMECC Museum Project  In 
a message dated 7/20/2020 1:10:59 AM US Mountain Standard Time, 
cctalk@classiccmp.org writes: 
Hi, I bumped into an old friend of mine today.  We both talked about a pair 
ofmachines we worked on that no longer exist as far as we cant tell.  Theywere 
both Adage machines and had the same base digital architecture.  Theirnames are 
Ambilog 200 and AGT-30.  The Ambilog was the predecessor to theAGT line.  The 
AGT came in 3 flavors, AGT-10, AGT-30 and AGT-50.  The 30seems to have been the 
most prevalent. They were 30 bit, one's complement machines.  The Ambilog had a 
beautifulconsole that used an IO Selectric.  It was designed as a 2D vector 
graphicsmachine. Here's an image of the Ambilog 200: Ambilog 
200
 The AGT/30 was a very advanced 3D vector machine.  The XYZ signals for 
thedisplay came from a 4 x 3 "hybrid" matrix multiplier which allowed for 
3Dimaging with Z axis depth cueing.  The matrix multiplier was a 19 in rackof a 
dozen discrete 15 bit multiplying D to A converters.  About once ayear it had 
to be re-calibrated due to long term drift. Here's a link to an image of an 
AGT-30: Adage 
AGT-30
 And here is it's 1.5 seconds of fame from the SciFi classic "Dark Star": 
AGT-30das Blinkenlights  Anyway, it turns 
out he has quite a few of the source and backup tapes.Unfortunately they are 7 
track 556 BPI.  So the question is: is thereanyone out there that can assist 
with either reading these tapes or (betteryet) has a 7 track tape head we could 
buy? Our goal is to preserve this forgotten machine designed at the start of 
thecomputer graphics era.  Writing a full emulator is our goal. I live in the 
Bay Area.  Maybe those of you with connections to CHM couldsee if we could read 
the tapes on the 1401.  Or maybe one of you has a 7track driver in your junk 
file.  All we really would need is the head andwe could put it on an existing 
drive.  As a last option, a commercial taperecovery vendor although that is 
probably too pricey. Thanks, Marc Howard

Re: Getting files off a 7300--Mission accomplished

[Al Kossow via cctalk]

On 7/19/20 12:42 PM, Chris Zach via cctalk wrote:

Now I have a big crate with "Convergent technologies" sitting in my truck, I'll have to figure that one out next. Also more Perq manuals and 
floppy disks.


Probably a miniframe or mightyframe, considering the 7300 is a Convergent 
machine under the ATT badge.

Could you tell if TCP/IP is installed, since it has the rare Ethernet card in 
it.

I don't know if 7300 TCP software is archived anywhere.

Anyone out there that can read 7 track / 556 BPI tapes?

[Marc Howard via cctalk]

Hi,

I bumped into an old friend of mine today.  We both talked about a pair of
machines we worked on that no longer exist as far as we cant tell.  They
were both Adage machines and had the same base digital architecture.  Their
names are Ambilog 200 and AGT-30.  The Ambilog was the predecessor to the
AGT line.  The AGT came in 3 flavors, AGT-10, AGT-30 and AGT-50.  The 30
seems to have been the most prevalent.

They were 30 bit, one's complement machines.  The Ambilog had a beautiful
console that used an IO Selectric.  It was designed as a 2D vector graphics
machine.

Here's an image of the Ambilog 200: Ambilog 200


The AGT/30 was a very advanced 3D vector machine.  The XYZ signals for the
display came from a 4 x 3 "hybrid" matrix multiplier which allowed for 3D
imaging with Z axis depth cueing.  The matrix multiplier was a 19 in rack
of a dozen discrete 15 bit multiplying D to A converters.  About once a
year it had to be re-calibrated due to long term drift.

Here's a link to an image of an AGT-30: Adage AGT-30


And here is it's 1.5 seconds of fame from the SciFi classic "Dark Star": AGT-30
das Blinkenlights 

Anyway, it turns out he has quite a few of the source and backup tapes.
Unfortunately they are 7 track 556 BPI.  So the question is: is there
anyone out there that can assist with either reading these tapes or (better
yet) has a 7 track tape head we could buy?

Our goal is to preserve this forgotten machine designed at the start of the
computer graphics era.  Writing a full emulator is our goal.

I live in the Bay Area.  Maybe those of you with connections to CHM could
see if we could read the tapes on the 1401.  Or maybe one of you has a 7
track driver in your junk file.  All we really would need is the head and
we could put it on an existing drive.  As a last option, a commercial tape
recovery vendor although that is probably too pricey.

Thanks,

Marc Howard

Interested in Microport 286 System V?

[Robert Lipe via cctalk]

Hi, Warren. We've spoken a few times through the decades, but a have a
friend with a delightful relic of PC Unix history: the original 286 UNIX
port, well before SCO with Xenix.

Bela is in Mountain View, CA so he's on the wrong continent for you, but I
figured you might know of an appropriate home for this.

https://m.facebook.com/story.php?story_fbid=3516115585074301=10276824078&_rdr


Thanks for all you've done to preserve UNIX.

RJL

Re: Anyone out there that can read 7 track / 556 BPI tapes?

[Chuck Guzis via cctalk]

On 7/18/20 7:37 PM, Marc Howard via cctech wrote:
> Hi,

> I live in the Bay Area.  Maybe those of you with connections to CHM could
> see if we could read the tapes on the 1401.  Or maybe one of you has a 7
> track driver in your junk file.  All we really would need is the head and
> we could put it on an existing drive.  As a last option, a commercial tape
> recovery vendor although that is probably too pricey.

I can do it (and do it routinely for government entities).  But I'm in
Oregon.

--Chuck

Re: Getting files off a 7300--Mission accomplished

[Chris Zach via cctalk]

Thanks David, and everyone else for helping me with getting these files 
off. Starting on Friday I hooked up a serial cable and null modem to my 
laptop PC, got getty running, and logged into this 7300 as install.


Escalated to root and went over to his directory. The big problem is the 
system did not have kermit but it *did* come with an XModem like program 
that I could hook up to with a simple Xmodem protocol on the PC. 
Uploaded Kermit, and sure enough it works...


From there it was a matter of copying the files and . files in his home 
directory, then tarring and compressing the big directories. This let me 
know just how far we had come: It would take 10+ minutes to compress a 
6mb tar file, but when I decompressed it on my Mac Mini it would take 
well under a second. We have come a long way...


After moving all the files and directories I patted the computer on the 
top of the monitor and said to it "Well Done, though good and faithful 
servant" then did a rm -r on the rdd directory. Now I can put it up for 
sale and give the money to his mom.


Today I went over to her house with a 40 page folder of some of his 
writings. Bob was among other things an amazing author, and the items on 
this computer spanned his life from 1986 to about 1993. She was very 
happy to see his writings and poems, in a way it gave her a chance to 
get to know him again even after all these years


Now I have a big crate with "Convergent technologies" sitting in my 
truck, I'll have to figure that one out next. Also more Perq manuals and 
floppy disks.


It's never a dull moment. But it's nice I was able to use my forensics 
skills to bring an old friend to life again...


CZ


On 7/16/2020 10:05 PM, David Gesswein via cctech wrote:

On Mon, Jul 13, 2020 at 06:12:34PM -0400, Chris Zach wrote:

Anyone know the best way to get files off an AT 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...)



You may have finished by now but since I have done that reasonably recently I 
though I would
document what I did/found.

Probably the best way was the serial already discussed since you can start it 
running and
let it run without needing to interact. I used kermit.
Copy here
http://unixpc.taronga.com/csvax/

Kermit setting I used on Linux
set line /dev/ttyUSB2
set speed 9600
set send packet-length 1000
set file names literal
SET CARRIER-WATCH OFF

kermit settings I used on 3b1
set window 3
set receive packet-length 1000
set file names literal
set file type binary

I had enabled login on the serial port and had logged in so didn't need the set 
line.


You have the floppy drive. The normal 3b1 format is 8 or 10 sectors but it can 
with the
proper software read & write DOS disks.
Later versions of the OS came with msdos command to read floppies and md_write 
and md_format.
You probably want to use them to install mtools which are nicer for using msdos 
floppies.
Binaries in above directory.


/dev/fp021 is floppy first partition, /dev/fp020 is full disk


Also found this page on transfering files that gives another method.
https://rhodesmill.org/brandon/notes/unixpc/transfer.html

If you have a floppy or hard drive image such as from my emulator there are 
tools to
work with them. https://github.com/dgesswein/s4-3b1-pc7300
Since mounting was done as Linux kernel driver its going to be work to get it 
to build on
current Linux. I have a fedora core 20 system I keep around that the driver 
works with.


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?


Never had access to a machine with Ethernet so can't help.