Re: Strange keyboard problem

James Mastros (
Mon, 21 Apr 1997 15:23:35 -0500 (EST)

On Mon, 21 Apr 1997, Jeffrey Wiegley wrote:

> Etienne Bernard wrote:
> >
> > Hello,
> >
> > I use kernel 2.1.30 and since I connected my HP48SX calculator
> > (yes, yes :-) as a VT52 terminal on ttyS1, I sometimes have a problem with
> > my keyboard: it blocks, without any kernel message. All I have to do is
> > to log on and reboot (hard)...
> >
> > I don't think it's an hardware related bug, since I had no problem
> > before I connect this strange terminal. Here is an excerpt from my inittab:
> >
> > T1:23:respawn:/sbin/getty -L ttyS1 9600 vt52
> >
> > I use a P133 on an Asus P55T2/P4 motherboard, with 64 MB memory.
> >
> > My .config is:
> Darn, now I have to go buy a new HP calculator since this is just way
> too oddball
> and cool to do with a calculator and linux...

BTW, I would suguest a HP 48 GX, not a SX, since the S series is getting
kind of old.

In any case, wether or not the HP48 is emulating a VT52 correctly (it most
likely is), or even putting out proper signals to the serial port, these
(possibaly) bad inputs such as those should certinally not cause the
kernel to freeze (refergrator jokes non-withstanding). My guess to the
actual source of the problem is that the serial port is set to a faster
speed then a poor old HP48SX can handle (9600 bps, with a good emulator).

-=- James Mastros
The Man Who Dosn't Write E-Mails Shorter Then His