TI-H: TI-85 MIDI interface

To: ti-hardware@lists.ticalc.org
Subject: TI-H: TI-85 MIDI interface
From: "Mikko Kuorelahti" <mk_kopi@hotmail.com>
Date: Sat, 23 Aug 1997 08:12:35 PDT
Reply-To: ti-hardware@lists.ticalc.org

 I have been an owner of a TI85 for several years now, I have programmed 
some small programs/games for ZShell, but for the last 6 months I have 
been so lazy that my calc has been in my drawer without batteries the 
whole time. After visiting the new ticalc.org site I decided to post 
some of my experiments with the TI85 to the mailinglists. This list 
seemed appropriate since the experiment, which I would like to see 
finished is almost complete (for the research) except for the hardware 
part.
 
 The TI-85 link port is capable of sending/recieving data at the speed 
of the MIDI transmission protocol, so a MIDI interface for the TI85 
would be simply a matter of timing and hardware. The timing part is done 
- I dug out my Z80 code and found my sources for a MIDIlib (well 
actually someones wavlib with some nop's and loops added for timing 
purposes), which I would be more than happy to send to anyone interested 
in this. A MIDI output port for the TI85 would be extremely cheap to 
make, to my understanding a +5V DC source and a transistor would be 
enough.

If interested, read 
http://sunsite.unc.edu/emusic-l/info-docs-FAQs/MIDI-doc/MIDI-Primer.txt



--- Köpi Kuorelahti ---


P.S. The policy of not being able to send messages without joining the 
ti-hw maillist limits my using of it (HotMail is buggy enough already) , 
so I will be unsubscribing quite soon. If you want to contact me, do it 
personally, not via the mailinglist


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