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- The following is a list of commonly asked questions about the
- explosiv screen saver :
-
-
-
- Q. How much memory does explosiv use as a screen saver?
-
- A. Both versions of explosiv make every effort to use as little
- memory and as few resources as possible. In the case of explosiv
- for DOS the memory usage depends a great deal on how many features
- you wish to have. As a simple screen blanker explosiv uses
- about 1K while if you load fireworks with font saving explosiv
- uses about 16K. Explosiv can be configured such that
- only the display you've requested is loaded for the monitor you
- have ( thus minimizing its usage of memory ).
-
-
-
- Q. When explosiv for DOS starts the program underneath is completely
- stopped. Can this be fixed?
-
- A. No. DOS is a single tasking operating system. This means that only
- one program can be run at a time. So explosiv can run the animation
- routines only if it stops the currently executing program. The
- "blank" display works differently since all it does is turn the screen
- off. It can then let the underlying program continue while it is
- waiting for a key press.
-
-
-
- Q. Explosiv occasionally blanks the screen even if I'm in text mode.
- Why doesn't it run the animated display instead?
-
- A. When explosiv has been inactive the specified time interval it runs
- a series of tests to determine whether or not it will be able to
- correctly save and restore the state. It will blank the screen if
- it decides that it won't be able to restore the state perfectly.
- This ensures that the screen saver will, hopefully, never disturb
- any aspect of the original display.
-
- Of course, explosiv cannot restore every state. There are certain
- hardware limitations that just cannot be overcome. For instance,
- you will find that on your EGA the border color may not be restored
- correctly. There is no way for explosiv to read the border color
- and it must assume that it is black.
-
- If you wish to disable blanking, turn the animated display off
- or simply disable the screen saver you may use the "+on", "-on"
- and "off" switches, respectively. These switches are provided
- so that in rare case that explosiv does not select the proper
- screen saving mode you may manually override it. Hopefully,
- you will never find a program in which this is necessary.
-
-
-
- Q. How do I get explosiv to work properly with my Hercules graphics
- card?
-
- A. The hercules graphics card has some very different characteristics
- from other cards. In particular, there is no reliable way to
- detect whether you are in text mode or graphics mode. So
- explosiv, once active, does not know whether it should restore
- the screen to text mode or to graphics mode. To further
- complicate things there are two possible graphics modes ( more
- specifically, graphics pages ) that the card can be in.
-
- However, explosiv provides switches that allow you to manually
- tell explosiv into which mode it should restore the screen.
- To restore the screen to text mode ( which is the default )
- use the "on" switch. To restore the screen to graphics mode
- use either "+on" or "-on". To disable the screen saver use
- the "off" switch.
-
- For example, if you have a program that runs in graphics mode
- you need to write a small batch file with the lines
-
- @echo off
- explosiv +on
- graphics program
- explosiv on
-
- Run the batch file and see if explosiv properly restores the
- screen. If it does not work replace the "+on" with "-on" and
- try again. If this does not work then explosiv must be
- disabled while you are running this program. You may do this
- by replacing "-on" with "off".
-
-