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Alpha Syntauri keyboard interface
- Subject: Alpha Syntauri keyboard interface
- From: mjmahon@aol.com (Michael J. Mahon)
- Date: 07 Oct 2003 07:08:20 GMT
- Newsgroups: comp.sys.apple2
- Organization: AOL http://www.aol.com
- Xref: archiver1.google.com comp.sys.apple2:168
The Alpha Syntauri synthesizer keyboard supported velocity-
sensing, with a keyboard matrix that had SPDT switches for
each key. The controller measured the time required for a
key to go from fully up to fully down and computed the velocity
of the keypress.
This probably required a processor on the controller board,
both for scanning speed and for dedicated attention.
Does anyone have one of these controllers who could give
me some hints about the circuit and firmware?
-michael
Check out amazing quality sound for 8-bit Apples on my
Home page: http://members.aol.com/MJMahon/