The Psion Organiser II Forum (http://forum.psion2.org/YaBB.pl)
User Forum >> Help >> Digitron Datalogger SF10 Cable
(Message started by: amgt36 on Aug 17th, 2019, 11:23pm)

Title: Digitron Datalogger SF10 Cable
Post by amgt36 on Aug 17th, 2019, 11:23pm
Hello Psion aficionados,
Does anyone have access to a Digitron Datalogger SF10 Cable and could confirm the pinout wiring for me please? I seem to be having issues with the TXD and Screen lines.
Also, whilst I have your attention, do we have anywhere a copy of the two utilities from the SFFD3 floppy disk? Known as LOGLINK and COMLINK, they were supplied by Digitron on a diskette. Having contacted Digitron recently, they no longer have the files, the company having been bought out a number of times apparently and the data lost and neither of my Dataloggers came with a floppy disk.
Regards,
Dave.

Title: Re: Digitron Datalogger SF10 Cable
Post by MartinReid on Aug 18th, 2019, 8:28am
Dear Dave

Jaap has some of the Digitron SF-10 'stuff' on his web site...

https://www.jaapsch.net/psion/packs.htm

and here

https://www.jaapsch.net/psion/galdev2.htm#digitron

Jaap visits the forum regularly.

Sincerely and in good faith
Martin

addendum

Appendix B of the The SF10 Logger Manual shows the TDX on PIN1.

https://www.jaapsch.net/psion/mandigitron.htm

Title: Re: Digitron Datalogger SF10 Cable
Post by jaap on Aug 19th, 2019, 1:00pm
As Martin wrote, the pinout diagram for one end of the cable is in the manual on my site:
https://www.jaapsch.net/psion/mandigitron.htm#cB

I'll try to dig up my cable and see how it is wired up to the DB25 plug at the other end.

I own the SFFD3 diskette, but unfortunately it seems unreadable in the floppy disk drive I have. If anyone else has a better drive and the tools to retrieve the content even if corrupted, I'll gladly post the diskette to them.


EDIT:

I have  now checked the wiring of the SF10 PC cable.
Number the male 5-pin end like this:

1-2-3
-4-5-
It also has an outer ring around them, that I'll call pin 0.


Number the female DB25 end like this:

-1--2---3---4---5---6---7---8---9---10--11--12--13
--14--15--16--17--18--19--20--21--22--23--24--25--

Then the connections are:

0 to 13
1 to 12
2 not connected
3 to 11
4 to 10, 8, 6, and 19
5 to 7

Title: Re: Digitron Datalogger SF10 Cable
Post by starhawk on Aug 19th, 2019, 9:52pm
Jaap, is your floppy drive a USB model? Those will almost always fail to read 720k disks. I have an operational 486 Toshiba T3400CT, but I don't have recovery software. I can look into that tho.

Title: Re: Digitron Datalogger SF10 Cable
Post by amgt36 on Aug 20th, 2019, 2:50am
Thanks for the replies gents, especially the pinouts, Jaap.

The pin numbers you give seem to be reversed from mine, there being no numbers on the outside face of a DB25 free socket connector. I'd opened my connector and read the numbers from the inside face and can recognise a mirrored arrangement of your connections. Similarly there are numbers marked on the outside of the sealed male 5-Pin plug which I used a magnifying glass to read.

I like your designation of pin zero, that's cool.

So my pinout is as below:

5-Pin 0 to DB25-Pin 1(Protective Ground)
5-Pin 1 to DB25-Pin 3(TXD)
5-Pin 2 to DB25-Pin NC - (Given as TRIG in Digitron literature)
5-Pin 3 to DB25-Pin 2(RXD)
5-Pin 4 to DB25-Pin 7(Signal Ground)
5-Pin 5 to DB25-Pin 4,6,8,20(RTS,DSR,DCD,DTR)

This ties in exactly with yours and shows that I do indeed have a problem, I suspect at the DB25 end. My 5-Pins 1 & 0, and hence DB25-Pins 1 & 3 are shorted together where the screen has most likely been crushed into the cable cores in the clamp. I'll see if I can strip the sheath back and have a closer look.

Thanks again, and if "starhawk" is able to read your disk, that would be great. I also have a 486 machine with a 1.44MB/720KB floppy drive and will happily spin your disk if you wish.

Regards,

Dave.

Title: Re: Digitron Datalogger SF10 Cable
Post by jaap on Aug 20th, 2019, 5:42am

on 08/19/19 at 21:52:31, starhawk wrote:
Jaap, is your floppy drive a USB model? Those will almost always fail to read 720k disks. I have an operational 486 Toshiba T3400CT, but I don't have recovery software. I can look into that tho.

I didn't know that. I'll try to find a USB floppy drive that does handle them and see if that works.


on 08/20/19 at 02:50:20, amgt36 wrote:
The pin numbers you give seem to be reversed from mine

Sorry, my numbering for both plugs is looking from the outside into it, which I guess is not standard. If I look closely, the numbering visible on both plugs is the mirror of what I used.

Title: Re: Digitron Datalogger SF10 Cable
Post by jaap on Aug 21st, 2019, 7:21pm
With a new USB floppy disk drive I have been able to read my SSFD3 disk. It contains the LOGLINK program, version 2.03. It does not have COMLINK, because according to the readme file it had become redundant, with LOGLINK being able to do the same when called with a particular command line parameter.

It can be found on this page:
https://www.jaapsch.net/psion/progs2.htm#pc
Direct download link:
https://www.jaapsch.net/psion/software/pc2/sffd3.zip

Thanks starhawk for telling me it was the drive that was the problem, not the disk.

Title: Re: Digitron Datalogger SF10 Cable
Post by amgt36 on Aug 21st, 2019, 11:25pm
WooHoo!!!

Rock 'n' Roll ...  ;D

Nice one chaps, just shows what a bit of teamwork can achieve!!

I've even fixed my wobbly SF10 Cable.

Thanks for sharing your files, Jaap.

Regards,

Dave.

Title: Re: Digitron Datalogger SF10 Cable
Post by starhawk on Aug 23rd, 2019, 6:04am
Glad to help :)

I didn't know there was such a thing, BTW, as a USB floppy drive that *could* read 720k disks...



The Psion Organiser II Forum » Powered by YaBB 1 Gold - SP 1.1!
YaBB 2000-2002,
Xnull. All Rights Reserved.