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From: wcs@ho95b.UUCP (59576)
Newsgroups: net.wanted,net.periphs,net.unix
Subject: RS-232 Question: Is CTS/RTS supported on System V ?
Message-ID: <233@ho95b.UUCP>
Date: Mon, 22-Oct-84 21:26:20 EDT
Article-I.D.: ho95b.233
Posted: Mon Oct 22 21:26:20 1984
Date-Received: Tue, 23-Oct-84 01:35:15 EDT
Organization: AT&T Bell Labs, Holmdel NJ
Lines: 21

I'm trying to interface an old printer which doesn't use XON/XOFF.
It has a hardware handshake on pin 19, indicating "buffer getting
too full", and drops DTR if the buffer overflows.  If the computer
responds by dropping DTR, it then does a page eject and goes off-line.

Is there any way I can get UNIX to use a CTS/RTS handshake, or to
interpret drop-DTR as "wait a sec" instead of "good-bye" ?
This would let me use pin 19 and some null-modem jumpers to get the
printer to work.  Otherwise I have to run the printer  at a
2/3 of its maximum speed and hope it doesn't overflow.

I'm running System V (release 2) on a VAX 11/780 with DZ-11s,
but advice based on other hardware or UNIX-versions will be gratefully
accepted as well.

			Thanks;  Bill Stewart ihnp4!ho95b!wcs
				 1-201-949-0705
-- 
			Bill Stewart
			AT&T Bell Labs, Holmdel NJ 1-201-949-0705
			...!ihnp4!ho95b!wcs