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Path: utzoo!decvax!harpo!seismo!hao!hplabs!sri-unix!overman@AEROSPACE
From: overman@AEROSPACE@sri-unix.UUCP
Newsgroups: net.micro.pc
Subject: DOS 2.0 Slowness
Message-ID: <1912@sri-arpa.UUCP>
Date: Mon, 6-Jun-83 11:43:00 EDT
Article-I.D.: sri-arpa.1912
Posted: Mon Jun  6 11:43:00 1983
Date-Received: Mon, 13-Jun-83 10:54:30 EDT
Lines: 15

From:  overman at AEROSPACE (William T. Overman)

I have a program that uses the printer port extensively, sending
raster images to an Epson printer in graphics mode.  I've found that
the same exact program runs MUCH slower under 2.0 than 1.1 (a factor
of 2 to 5).  Does anyone know if there are additional
port-activity-generated interrupts in 2.0?  If so, is there a way to
turn them off?  Or is there just infinitely more overhead in the DOS
call in 2.0.  (An interesting sidenote: the IBM even under 1.1 is much
slower to DOS a byte out the printer port than my old Sol).

Another question: who do you call with such questions?  Microsoft
refuses to answer any.

Bill Overman