Path: utzoo!attcan!uunet!snorkelwacker!apple!oliveb!bunker!wtm
From: campbell@hp-sde.sde.hp.com (Gary Campbell)
Newsgroups: misc.handicap
Subject: Re: Artic Vision and Procomm
Message-ID: <9927@bunker.UUCP>
Date: 1 Feb 90 17:57:22 GMT
References: <9875@bunker.UUCP>
Sender: wtm@bunker.UUCP
Reply-To: campbell@hp-sde.sde.hp.com (Gary Campbell)
Distribution: misc
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Index Number: 6542

Could you explain more about the tracking problem?  I have seen a
problem with Artic, and I was under the impression that it was the case
with many speech packages, but I don't know where I got that impression.
The symtom is that Artic speaks something that it passes on the way to
its destination.  If you are doing a single character or line move this
appears as saying the character moved from instead of the character
moved to.  I have never written a speech package, so I may be displaying
my ignorance here, but here goes...  If I were starting to write a
speech package (and especially if I didn't know about this problem) I
would try the following:
The cursor key interrupt service routine (isr) would first call the
normal BIOS cursor move routine.  When the code returns from this
routine, I would assume that the cursor was moved and initiate the
speech function.  (Then I would find all of the problems with doing it
that way and why it isn't that simple-- things usually aren't!)  If this
is the way many speech packages, or Artic work then:  Think about what
happens when you press a key (oh boy that was supposed to be the
keyboard isr, and I'm not going to have time to fix this before my
bus...)  But the code that is normally executed, instead of causing the
cursor to move, causes an escape sequence to be sent to the host.  The
host then sends one back to the PC, which causes its cursor to move...
but by this time the keyboard isr has returned to the speech package and
it assumes that the cursor has moved.  Some speech programs, like the VP
and JAWS (I assume) watch for the cursor to move before they speak.  Is
that what Provox does David?

Gary Campbell

never post whenb you have to hurry!!