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Path: utzoo!watmath!clyde!cbosgd!rlp
From: rlp@cbosgd.UUCP (Dazed and Confused)
Newsgroups: net.micro.atari
Subject: ST questions
Message-ID: <1714@cbosgd.UUCP>
Date: Fri, 27-Dec-85 11:42:13 EST
Article-I.D.: cbosgd.1714
Posted: Fri Dec 27 11:42:13 1985
Date-Received: Sat, 28-Dec-85 01:49:55 EST
Reply-To: rlp@cbosgd.UUCP (Dazed and Confused)
Followup-To: net.micro.atari
Distribution: net
Organization: AT&T Bell Laboratories, Columbus
Lines: 19

I have a few questions about the ST that I hope someone will be kind enough
to take the time to answer:

1) Can the GI AY-3-8910 programmable sound generator (PSG) be used as a D/A
   converter? My information from GI's catalog is incomplete. It seems there
   are three 4-bit (lo-fi, anyone?) logarithmic D/A converters on the PSG that
   normally take tone generator inputs, but there is an amplitude control
   register that specifies a 4-bit amplitude plus a 'mode' bit that the data
   sheets don't describe. My guess is that one of the modes tells the D/A
   to just output the 4-bit value in the register. Anyone know?

2) Is there a way (say from BASIC) to turn off all graphics DMA (similar to
   the DMACTL register of the 400/800)?

3) What is it that causes INTERPC's terminal software to crash the system
   (usually)?

						Thanks in advance,
						cbosgd!nscs!jmk (Joe Knapp)