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QWIKSCRN.DOC
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1986-12-27
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QWIK Screen - Video I/O Routines.
(C) Copyright by Michael J. Acker.
MJA Software May 24, 1986
DESCRIPTION:
QWIK Screen is a resident program that replaces the Video
Bios routines on the IBM-PC. The main purpose of Qwik screen
is for faster screen updates in the text mode. This program
will support the graphics modes with only a small degradation
in performance. But, if your applications require exstensive
use of the graphics display modes then Qwik screen is not the
video updating program that you're looking for. For those of
you who use your IBM-PC in the text mode the majority of the
time, you will notice a substantial increase in the speed at
which Qwik screen updates your video.
Without the device driver Ansi.sys installed you will see
an increase of 10 to 60 % in video performance depending on
each individual application. PC-DOS makes use of the Bios
TTY function to update the screen. The IBM Bios can update
the screen at the rate of approx 550 characters per second,
where as the faster code contained in Qwik screen will update
at the rate of approx 1000 characters per second.
With the device driver Ansi.sys installed you will see an
increase of 5 to 40 % in video performance depending on each
individual application. The Ansi.sys device driver makes use
of the position cursor and write character functions of the
Bios to update the screen. Using these two functions of the
Bios the screen is updated at the rate of approx. 600 characters
per second, where as the faster code contained in Qwik screen
will update the screen at the rate of approx 800 characters per
second. Ansi.sys takes some of the screen updating functions
away from the Bios; therefore Qwik screen can not give the same
increase in performance as seen when Ansi.sys is not installed.
If you find this program beneficial and use it all then a
suggested contribution of $ 5.00 would be greatly appreciated.
I have other Bios enhancement routines available for the IBM
PC and compatables.
1) An interrupt driven printer routine with up to 64k buffer.
2) A keyboard enhancement routine that allows for a 256
character keyboard buffer and speeded key repeat.
3) An enhanced print screen program that when used with any
print spooler will make the print screen instantaneous.
If you are interested in any of these other programs or
wanted to send your contribution immediately. Please direct
your correspondence to:
MJA Software
Michael J. Acker
4206-45th Street
Lubbock, Texas 79413
USAGE:
Qwik screen replaces the Bios routines, now contained in ROM,
on your IBM-PC; therefore, Qwik screen must be resident before
any other programs that "hook" themselves to the Bios interrupt
vectors for video I/O. A good time to load Qwik screen is upon
bootup in your Autoexec.bat. The following is a description of
how to invoke Qwik screen and make use of the available options.
QWIKSCRN - Simply loads and becomes resident replacing
the current video bios routines contained
in ROM. Users with an IBM Color/graphics
board may experience glitches during screen
scrolling but this can be elimated with the
/C option.
QWIKSCRN /C - This option makes Qwik screen compatable
with the bios routines for scrolling the
screen on a color monitor.
QWIKSCRN /B - This option causes the cursor to be changed
to a blinking block instead of an underline.
QWIKSCRN /F - This option will give another 10 % increase
in performance by use of a different cursor
positioning routine contained in Qwik screen.
Some applications turn the cursor off for
strictly cosmetic appearences, so this
option may cause cosmetic results that are
displeasing and therefore should not be used.
Any combination of these options can be used when Qwik screen
is invoked but for ease of parsing the command line they must be
each seperated by a backslash. (ex. QWIKSCRN /C/B/F)
----------------end-of-author's-documentation---------------
This disk copy provided as a service of
The Public (Software) Library
Disks in the library are updated monthly.
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The Public (Software) Library
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(713) 721-6104
Please direct shareware payments and specific questions about
this program to the author of the program, whose name appears
elsewhere in this documentation. If you have trouble getting
in touch with the author, we will do whatever we can to help
you with your questions.