RE: A89: Sound Progs

To: "'assembly-89@lists.ticalc.org'" <assembly-89@lists.ticalc.org>
Subject: RE: A89: Sound Progs
From: Mark Scott <mscott@canada.dbcity.com>
Date: Fri, 16 Apr 1999 11:52:11 -0500
Delivered-To: assembly-89-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-89@lists.ticalc.org
Reply-To: assembly-89@lists.ticalc.org


Yeah on my 85 if you plug it in the calculator freezes.  Just like if
you don't run your transfer program before you plug the link in (homeade
parallel).  I just only plugged in the headphones after the asm program
started.

Mark E. Scott Jr.
mscott@dbcity.net

-----Original Message-----
From: Patrick Sweeney [mailto:psweeney@geocities.com]
Sent: Friday, April 16, 1999 9:21 AM
To: assembly-89@lists.ticalc.org
Subject: Re: A89: Sound Progs



And on the 85, from what I hear, is that the headphones break the
circuit in the
jack, which, if not supplemented by external power, causes the calc to
slow
down.
I thought this was happening here too, but I guess not.
-Patrick



Justin Karneges wrote:

> Not bad, but here's a better one. =)
>
> The TI-83,86,89 and 92 all have auto uploading.  That is, the TI
Winlink
> software can upload files to these calcs without them being in receive
mode.
> How does this work?  Well the TI-OS normally checks the linkport in an
> interrupt to see what's going on.  Since the headphones don't comply
with
> the TI link protocol, the TI-OS constantly times-out every time it
tries to
> check the port thus slowing the calc down immensly.  Plug in a set of
> headphones when a program is running and you may not have this
problem.
> This, of course, depends on your calc and the program running.  If you
have
> the 83/86 then the TI-OS checks the linkport everytime GET_KEY is
called.
> If a program only uses direct input, then you'll have no problem.  The
89/92
> have an interrupt-based check and so it probably will take more than
just a
> program running to solve the problem.
>
> To prove my point, try plugging in a set of headphones while playing
SQRXZ
> on the TI-83 or TI-86.  No slowdown.  Quit the game and then you get
> slowdown.  Doh!  The general rule of thumb for using sound with your
calc is
> to plug in the headphones AFTER you start the sound-using program.
>
> -Justin Karneges [Infiniti]
>
> > That's a great answer... how about a more descriptive one?
> >
> > The 89's link port is powered by the 4AAA batteries, so when you
plug in
> > unpowered headphones, this really cut power from the rest of the
calc,
> > slowing it down.  If you plug powered speakers into the 89 port,
then you
> > won't notice this slow down as much.
> >
> > -Miles Raymond      EML: m_rayman@bigfoot.com
> > ICQ: 13217756       IRC: Killer2        AIM: MRayMan
> > http://www.bigfoot.com/~m_rayman/
> >
> > ----- Original Message -----
> > From: Patrick Sweeney <psweeney@geocities.com>
> > To: <assembly-89@lists.ticalc.org>
> > Sent: Thursday, April 15, 1999 5:44 PM
> > Subject: Re: A89: Sound Progs
> >
> >
> > > No it isn't.
> > >
> > > Wingman627@aol.com wrote:
> > >
> > > > Is it abnormal that when I plug headphones into my calc that it
> > "freezes"?
> >
> >