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From: bayes@hpfcrj.HP.COM (Scott Bayes)
Newsgroups: comp.sys.hp
Subject: Re: Guts of the tone generator on the 320 system
Message-ID: <4680004@hpfcrj.HP.COM>
Date: Wed, 29-Apr-87 15:19:19 EDT
Article-I.D.: hpfcrj.4680004
Posted: Wed Apr 29 15:19:19 1987
Date-Received: Sun, 3-May-87 06:01:48 EDT
References: <1365@ucbcad.berkeley.edu>
Organization: HP/SSO Ft. Collins, CO.
Lines: 11

As far as I can see, Tom Lane's exposition of the H/W guts of the 4-voice
beeper is correct, at least as far as the hardware is concerned. I should
know, I have to maintain the document he mentioned, and that part hasn't
changed.

As far as talking with this device using HP-UX is concerned, check out
Peter Marvit's response. Putting the two responses together should give you 
a pretty good model right down to the silicon.

Scott Bayes
hpfcla!bayes