🚀 go-pugleaf

I am currently working on a project which involves data acquisition.  I need
to read the parallel port at an average rate of every 35 microseconds.
Therefore, I really can't use interrupts.  I don't think I can service
an interrupt in 35 usec, and even if I could, I would starve my real-time
data processing.  What I would like to do, is put the data in a buffer, and
have my A500 periodically empty the buffer in the tightest loop possible.
I could tie a buffer empty signal to the pout or select line or something
like that.  I looked at the hardware RKM for some help, but found it terse
at best.  If someone could answer my questions, or direct me to a book 
with decent information, it would be appreciated.

1.	How do I "own" the parallel port resources?

2.	Am I required to use the ACK signal?  I really don't need to use it
	but I was wondering if it must be asserted after the data strobe to
	reset internal latches, etc.  If I must assert ACK, can I tie it
	to the data strobe?

3.	How do I read the POUT and SEL pins?

4.	How do I force the data pins to be always in the reading direction?
	I really don't want to deal with a bi-directional interface.

5.	When the Amiga powers up, will there be any data on the data lines?
	(I don't want to blow any drivers by hooking up my device before I
	have a chance to tell the parallel port that it needs to be in
	reading mode.)

I would really appreciate getting some answers to these questions, or
being directed to a book that has the info I'm looking for.  Actually,
a book would be best.  I am writing this in behalf of my brother, whose
machine is not on the net.  Please send your responses to rbw@spock.byu.edu
if its not too much trouble.  Thanks.

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