🚀 go-pugleaf

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)