Re: A89: Sound Progs

Re: A89: Sound Progs

• To: assembly-89@lists.ticalc.org
• Subject: Re: A89: Sound Progs
• From: TGaArdvark@aol.com
• Date: Fri, 16 Apr 1999 01:46:09 EDT
• Delivered-To: assembly-89-outgoing@towerguard.unix.edu.sollentuna.se
• Delivered-To: assembly-89@lists.ticalc.org
• Reply-To: assembly-89@lists.ticalc.org

> 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.

No, though it does probably drain the batteries faster, the
reason the calc slows down is because it triggers the
linkport interrupt.  It expects a data transfer and polls the
port, halting normal functions.  All CBL-compatible
calculators do this, even ones without silent linking
capabilities.

• Re: A89: Sound Progs
• From: "Miles Raymond" <m_rayman@bigfoot.com>

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