Path: utzoo!attcan!uunet!lll-winken!lll-tis!ames!ucsd!rutgers!bellcore!faline!thumper!ulysses!andante!alice!debra
From: debra@alice.UUCP (Paul De Bra)
Newsgroups: comp.unix.xenix
Subject: Re: SCO XENIX/386 and a slow lp
Keywords: XENIX 386, lp is real slow
Message-ID: <8186@alice.UUCP>
Date: 11 Sep 88 15:44:16 GMT
References: <5470@killer.DALLAS.TX.US>
Reply-To: debra@alice.UUCP ()
Organization: University of Antwerp
Lines: 12

My only experience is with the XENIX 286 lp driver. The manual does give
a number of suggestions about how to solve the slow lp problem. For some
(most?) printers none of the suggestions work. The driver needs a complete
rewrite, and that's what i've done. Works fine now, with many printers.

Hope SCO will have a completely rewritten driver in their next release.

The easiest way to improve the driver is to make it polling, to make sure
you get a while line out with one interrupt instead of getting an interrupt
per character (which causes extremely slow output). A polling driver which
works will be busy-looping between chars for a short time, and this may
have a very negative effect on the overall performance while printing.
(but it prints fast).