Date   : Fri, 13 Oct 1989 17:39:51 GMT
From   : mirror!ima!cfisun!lakart!dg@CS.BU.EDU (David Goodenough)
Subject: Wanted - information on the Mostek 3801

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               +---+
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