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From: dg@lakart.UUCP (David Goodenough)
Newsgroups: comp.os.cpm,comp.sources.wanted
Subject: Wanted - information on the Mostek 3801
Message-ID: <715@lakart.UUCP>
Date: 13 Oct 89 17:39:51 GMT
Reply-To: dg@lakart.UUCP (David Goodenough)
Followup-To: comp.sources.wanted
Distribution: usa
Organization: Lakart Corporation - The ultimate in broadcast automation
Lines: 22

I'm posting this to comp.os.cpm, since the question relates to a chip in
my Televideo 803 CP/M machine. If anyone can recommend a better newsgroup
to post to, please do so. Followups will go to comp.sources.wanted, or
you can just E-mail them to me.

The serial I/O chip in the Televideo 803 appears to be a hybrid cross
between a CTC, PIO, and SIO, all in one package: the Mostek 3801. As
delivered, the cpu has to poll the chip to receive incoming characters.
I would like to write a serial driver that uses interrupts, but I haven't
been able to find how to get the chip to generate an interrupt. I have
run tests with all the vectors in the interrupt table filled in, but my
suspicion is that I have to set a bit somewhere in a register to allow
the chip to generate interrupts for received characters.

Any ideas, hints, information, anything????

			Thanks in advance,
-- 
	dg@lakart.UUCP - David Goodenough		+---+
						IHS	| +-+-+
	....... !harvard!xait!lakart!dg			+-+-+ |
AKA:	dg%lakart.uucp@xait.xerox.com			  +---+