Hardware solutions to Linux accessibility

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Both the speaquilizer and braillex had that great advantage to them.

The real problem is the pci and before that, the vesa local bus and all
that.
Sure, I guess the ultimate solution is to somehow add code onto a video card
or something... or in this day , perhaps an externa computer which takes
care of video work for the main system...
I've seen some sgis that do that.

Unfortunately, this doesn't seem like it would work out of the box with
modern systems.  although there could be a convention with some systems out
there to tell it to display to something via bios or some kind of hardware
arrangement.

This really is the problem with virtually all the hardware out there...
whether it be a tivo, some computer you walk up to or any other kind of
highly computerized device.
Life would be much easier if you could just somehow tell it to display
somewhere else ...  alternative input seems to be much easier.

I did see a mac once, which was custom built for high end graphics work of a
particular kind.  it could have different plotters and displays connected to
it over it's ethernet connection, which it was aware of as it was brought
up.  I'm not sure what had to be done to make that happen, but it was pretty
cool.  I saw some potential then.


Anyone notice you can't even buy isa video cards now?  and some computers
don't have the slots?  I guess it doesn't pay to make cards like that now
when we dont settle on an archetecture for more then a few years.

I've heard some rumblings of embedded rt linux doing the graphics work for
some systems.  that would be as close to hardware as I think you'll see.
You could just add some code into the rom of the rt linux system to redirect
the video read information to another port and the main processor would
never know.

then your bluetooth aware speech synth would tell you when things started
happening?  oh wait, sorry that was a dream I had last night.

Joel

-----Original Message-----
From: blinux-list-admin@redhat.com
[mailto:blinux-list-admin@redhat.com]On Behalf Of Tim Pennick
Sent: Thursday, October 18, 2001 7:54 AM
To: blinux-list@redhat.com
Cc: Tim Pennick
Subject: Hardware solutions to Linux accessibility


Hi All,

Discussions recently about serial access to Linux, as well as Carl Dahlke's
work on kernel adapters made me think once more about whether it wouldn't be
possible with today's technology to re-explore the idea of braille/speech
using access via expansion slots on PC's.  Admittedly my understanding of
how
this works, and indeed of the hardware side of things in general means that
I
can't actually hazard much of a suggestion as to the way forward on this.
My
prompt for thinking about this was that by pure chance, I still happened to
have a hardware driven Braillex display connected to a machine I was trying
to
install Linux on, that I hadn't realised would work with Linux.  After
several
posts to this list earlier in the year, I was very grateful to receive
helpful
suggestions on how to get this working, and it is really so much easier to
use, and gives acess so much earlier in the boot/install process that it
seems
a shame to abandon it without some sort of discussion about revisiting this
solution.

The hardware solution became more or less obsolete for Windows access, when
screens could no longer be relied on to be a fixed size, (although thinking
about it, I'm not sure why this should have been such a problem).  For
25-line
X 80-column screens, its very hard to beat.  When I switch on my machine, I
see the memory check, and BIOS password prompt, and then all the information
even before the kernel is booted.

Even though I've tried brltty, and found it to be an excellent piece of
software, it still doesn't provide the snappy response to braille navigation
functions as the hardware solution.

Obviously the disadvantages are pretty numerous as well, though I'm not sure
how many of these are features of the age of the technology.  You have to
install a video card which is compatible with the Brailex interface card.
The
display is then driven vai a cable which connects to the braillex card
rather
than to one of the standard ports.  The keyboard connects to the machine via
the Braillex, so that cursor routing can be carried out via the keyboard
cable.

All of which means that its certainly not as easy to walk up to a machine
and
set up access to it, as it would be using brltty or speakup etc.

Anyway, this seems to have turned into vague meanderings rather than any
specific suggestions, but I'm interested to know if anyone else thinks the
hardware solution still has some miles left in it.

Regards,

Tim Pennick



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