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1988-04-26
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89 lines
SUPERSCROLL => The Program
**This program is placed in the Public Domain providing
this DOC file is kept intact with the program**
***WARNING***
This program MUST!! be run from the CLI only!!!!!!
=================================================================
=======*******MAJOR BUG FIX NOW WORKS WITH ALL PAINT PROGRAMS====
=================================================================
SuperScroll will scroll extremely smoothly any IFF non_overscan picture
including HAM!
I left out Overscan in case in case anybody might see a use for this
Hack. This way they will have to send me Huge amounts of cash or
credit card #'s.
To use it, load up your favourite Paint program and display the pic you want.
Then pull down the screen so that you can see the WorkBench in behind. Then
just open a CLI window and type "SS" without the quotes natch.
When you have the screns arranges the way you want press the "ESC" key,
(ESCAPE), and your screen will be scrolled.
If your mouse pointer does not freeze then click again until it does.
That's it, just sit back and enjoy the show.
When you want to quit or try another just press the "ESC" key again to quit
Everything will be back to normal.
=========================================================================
========================IMPORTANT========================================
I only test for user input (ESC key & Mousebuttons) when the scrolling =
picture reaches the top of the monitor screen. Therefore wait until then=
to enter any input. =
========================================================================
QUIRKS--BUGS--
If you type "SS" and your mouse freezes immediately, do either:
1. Click the Left mouse button and wait, you may still
be able to scroll your screen
2. Click the Left button and think about rebooting because
your CHIP memory is becoming quite FRAGMENTED!!
This seems to happen after multiple(more than 10) changes in
Screen Formats ala Dpaint.
If A Vertival Bar appears just press the LEFT mouse button and try again. This
is the sprite for the Intuition pointer which does not like to
be turned off,(who does!).
Hi-Res Interlace and Lo-Res Interlace Ham screens have a "Shimmer" to them.
This requires an optimization of the code which I will do this Weekend.
I just found and fixed a major bug which was keeping this Hack from
working properly all of the time. I was doing 16 bit addition onto
a LONG(32 bit), memory location and I was not checking for overflow.
That is now fixed and this Hack should work with everything.
This Hack takes up HUGE amounts of memory. Each bitplane is doubled
in size so that I can easily scroll 2 screens worth. On a 512k CHIP
RAM machine you will not be able to load a 640*400 by 16 color pic.
You will notice a small BLINK when the scrolling picture reaches the
end of the second screen. This has been tuned for the best match in
640*200 mode where it is just barely noticeable. When I have more
time I will fine tune it for the other screen resolutions.
The LEFT and RIGHT mouse buttons are used to change scroll speeds.
In this version, until it is optimized, they will only work in
LOW and MEDIUM resolution.
**COMING UP**
1. A requester to accept multiple filenames of IFF pics to be scrolled
one after the other. This way rolling CREDITS could be displayed easily.
2. OVERSCAN!
Please let me know of any quirks or problems you encounter.
I can be reached and hollered at on PLINK as
SLEBANS
Stephen Lebans
110 Columbus Ave
Moncton, New Brunswick
E1A-5E4 CANADA