[sdiy] What To Do With Old Computer Junk

Scott Gravenhorst music.maker at gte.net
Sun Sep 16 14:39:13 CEST 2001


And there is S-DIY here.  

I have long wanted to be able to extract a clock from
the MIDI F8 clock messages.  So I rummaged and found
a 486-133 (didn't need to be that fast, it was what I
had).  Also a PC-MIDI card.  All other junk standard.
Old 400 meg IDE drive.  Anyway, I put the DOS from
windows 98 on it and wrote a little C program that watches
the MIDI input port for F8 messages.  Each time one 
comes in, the program causes the DTR line to
toggle.  Each clock causes the line to alternate between
high and low.  Right now I have it blinking a light on
an old 9600 baud external modem.

Now I can use this signal to do LFO synching, and other
things that my FatMan normally wouldn't do.  I'm thinking
of using a PLL to multiply it's frequency for more options.

The program is a DOS program, uses COM1: and a MIDI port
at the standard default address.  It's also completely
THRU brain dead; this box must be the last device on the
MIDI chain.  Any interest in the code can be directed 
to me privately.

This program was made possible by the book:
"C Programming for MIDI", by Jim Conger

=========================================================  
- Government: The other religion.
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-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
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