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- QWIK Screen - Video I/O Routines.
- (C) Copyright by Michael J. Acker.
- MJA Software May 24, 1986
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- 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.
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- 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.
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- 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.
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- 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.
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- 1) An interrupt driven printer routine with up to 64k buffer.
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- 2) A keyboard enhancement routine that allows for a 256
- character keyboard buffer and speeded key repeat.
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- 3) An enhanced print screen program that when used with any
- print spooler will make the print screen instantaneous.
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- If you are interested in any of these other programs or
- wanted to send your contribution immediately. Please direct
- your correspondence to:
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- MJA Software
- Michael J. Acker
- 4206-45th Street
- Lubbock, Texas 79413
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- USAGE:
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- 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.
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- 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.
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- QWIKSCRN /C - This option makes Qwik screen compatable
- with the bios routines for scrolling the
- screen on a color monitor.
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- QWIKSCRN /B - This option causes the cursor to be changed
- to a blinking block instead of an underline.
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- 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.
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- 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)
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