Silver TI-GRAPH LINK USB w/ TI-92+ and TILP 2

[Christopher Howard]

Hi, I've got a TI-92+ and a separately purchased Silver TI-GRAPH LINK
USB cable. I use free software OSes, so I am attempting to connect to
the TI-92+ via TILP 2, in order to install new programs and maybe new
OS. When I try, TILP 2 is not detecting the calculator, though it seems
to detect that the cable is connected. If I try manually setting the
parameters I get error 11 resource not available. I've tried using TILP
2 I built myself under Guix OS, and also an older build from standard
Debian 9 package, but get the same error. I'm wondering if the cable I
bought is bad. I am wondering if there is anyone else on the list with
similar setup, maybe using TILP 2 from Debian/Ubuntu, and is or isn't
having the same problem.

--
Christopher Howard
p: +1 (907) 374-0257
w: https://librehacker.com
social: https://gnusocial.club/librehacker
gpg: ADDEAADE5D607C8D (keys.gnupg.net)

[Lionel Debroux]

Hi,

> I've got a TI-92+ and a separately purchased Silver TI-GRAPH LINK USB
> cable. I use free software OSes, so I am attempting to connect to the
> TI-92+ via TILP 2, in order to install new programs and maybe new OS.
> When I try, TILP 2 is not detecting the calculator, though it seems
> to detect that the cable is connected. If I try manually setting the
> parameters I get error 11 resource not available. I've tried using
> TILP 2 I built myself under Guix OS, and also an older build from
> standard Debian 9 package, but get the same error. I'm wondering if
> the cable I bought is bad. I am wondering if there is anyone else on
> the list with similar setup, maybe using TILP 2 from Debian/Ubuntu,
> and is or isn't having the same problem.

You're probably running TILP without being root (which is definitely
what you should be doing, don't worry), so: did you set up the udev
rules on that computer, so that you unprivileged user account can access
the SilverLink and other direct USB TI calculator devices ?
When it completes successfully, the standard install script, for which a
shortlink is https://ti-pla.net/tilpinst , mentions the documentation
file which describes the procedure for setting up the udev rules.
The online version of that file is
https://github.com/debrouxl/tilibs/blob/master/libticables/trunk/CONFIG
, the relevant section mentions /etc/udev/rules.d/69-libticables.rules .

I hope that this helps :)


Bye,
Lionel Debroux (current maintainer of libti*/gfm/tilp).


PS: FWIW, if you haven't found about them yet, there are two third-party
GPL'ed OSs for the TI-68k series:
* PedroM, which attempts to maintain quite a good level of compatibility
with assembly programs targeting TI's OS ("AMS"), as well as the TI-68k
variant of the DBUS protocol used for communicating with the calculator
through the link cable;
* Punix OS, which is a *nix derivative, and is in an earlier development
phase.
PedroM has a CAS with multiprecision computation support, so PedroM can
perform some computations that AMS can't; however, AMS can do lots of
things that PedroM can't: various CAS computations, function graphing,
unit computations, TI-Basic programming, etc.

Usage of these third-party OS is supposedly scarce in the real world,
especially for Punix OS, but they might be relevant to your free
software interests, so I thought I'd mention them :)

[Christopher Howard]

Hi, thank you for the response. I do actually run as root, since when I
don't, I get a permissions error, different from the "resource not
available" error I have been seeing. In Guix it is a bit of work to
install UDEV rules because you have to create a system service for
that, to integrate them into the system profile. Howewer, I did also
test on Debian 9 system, with the repo package, which does install the
udev rules in the standard place. So I know usb device permissions are
not the problem in this case.

I was hoping somebody might have a TI-92+ and the silver cable, to try
to reproduce my error in TILP on a Gnu/Linux system. If they couldn't,
then I would try buying another cable.

--
Christopher Howard
p: +1 (907) 374-0257
w: https://librehacker.com
social: https://gnusocial.club/librehacker
gpg: ADDEAADE5D607C8D (keys.gnupg.net)

On Tue, 2020-05-05 at 17:12 +0200, 'Lionel Debroux' via ticalc.org-