SynthModules

I have two versions of code running.  One is a polled I/O mode which
supports both MIDI input and output.  This works just fine.  I have
it running in a simple loop-through mode removing the MIDI active
sensing bytes from the stream.

I also have a version that runs with interrupt driven MIDI input into
a buffer and polled MIDI output.  I also have it running in a simple
loop-through mode and it works well but occasionally I get one bad
note. I haven't been able to track it down as I cannot use debug mode
at all with interrupts enabled.  I'll have to figure out a way to
determine what is being sent to the synthesizer and see if I can
track it backwards.

This took a lot more time than it should of.  So many items are not
documented well.  Thanks to all, especially Grant, who offered
suggestions and insight.

I still seem to have issues with variables that are bytes. 
Manipulating these bytes seem to clobber the bytes next to them.  It
all works fine if I make them all words.  Anyone else seen this?

I'll keep playing with this but will post the code if someone else
wants to start messing with it.

Dave

Hi Dave,

Congratulations!

Please do pass the code along. The whole idea behind the PSIM
(and the reason I agreed to participate in developement) is the 
public domain code to run on it.

If I make any tweaks or change it into something else, I will of 
course post it back to everyone.

Gary Chang had the idea of using the PSIM with a MIDI 
sequencer as a control voltage recorder/playback unit. What 
Subotnick called the "ghost electronics". If it works out, I'll pass it 
along.

--- In SynthModules@yahoogroups.com, "djbrow54" 
<davebr@e...> wrote:
> I have two versions of code running.  One is a polled I/O mode 
which
> supports both MIDI input and output.  This works just fine.  I 
have
> it running in a simple loop-through mode removing the MIDI 
active
> sensing bytes from the stream.
> 
> I also have a version that runs with interrupt driven MIDI input 
into
> a buffer and polled MIDI output.  I also have it running in a 
simple
> loop-through mode and it works well but occasionally I get one 
bad
> note. I haven't been able to track it down as I cannot use debug 
mode
> at all with interrupts enabled.  I'll have to figure out a way to
> determine what is being sent to the synthesizer and see if I can
> track it backwards.
> 
> This took a lot more time than it should of.  So many items are 
not
> documented well.  Thanks to all, especially Grant, who offered
> suggestions and insight.
> 
> I still seem to have issues with variables that are bytes. 
> Manipulating these bytes seem to clobber the bytes next to 
them.  It

> all works fine if I make them all words.  Anyone else seen this?
> 
> I'll keep playing with this but will post the code if someone else
> wants to start messing with it.
> 
> Dave