Re: A89: Sound Progs
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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"?
> >
> >
References: