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- Appendix for Explosiv 2.10 (cont)
-
-
-
- Commonly Asked Questions About
- Explosiv 2.10 for DOS
-
-
-
- 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 every possible display, etc., this uses about
- 28K. 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".
-