Xref: utzoo comp.unix.xenix:2706 comp.unix.wizards:9976
Path: utzoo!attcan!uunet!munnari!otc!metro!physiol!shocking
From: shocking@physiol.su.oz (Stephen Hocking)
Newsgroups: comp.unix.xenix,comp.unix.wizards
Subject: ADC boards under SysV
Keywords: DT2801, agony, masochism
Message-ID: <285@physiol.su.oz>
Date: 18 Jul 88 09:38:26 GMT
Organization: Physiology Dept., Univ. of Sydney, NSW, Australia
Lines: 18

G'day all,

	I've been given the delightful task of writing a device driver under
	Uport SystemV/AT for a Data Translations DT2801 ADC board. Has
	anybody ever tried to do this particular combo before? I've taken a
	good squizz at Bill Reeves' driver under BSD, but remain slightly in
	the dark about the problems involved. The board has this peculiar
	(in the Unix context anyway) feature of being a character oriented
	device with the ability to do DMA transfers. Of course, I can tell
	the system not to swap it out, and bump up its prioirity, but I cant
	guarantee exclusive access to the bus etc etc. Anybody got any
	ideas, past experience etc?

		Cheers,
		Stephen

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