🚀 go-pugleaf

>>   I'm planning on incorporating a screen saver into my program.
>>From what I gather, I'll need to hook onto 2 interrupts, 0x1C and
>>0x09.  My hook to interrupt 0x1C will increment a counter every
>>time it is called and if the counter is greater than a certain
>>amount of time, blank the screen.  My hook to interrupt 0x09 will
>>unblank the screen and clear the counter if the screen is already
>>blanked, otherwise it will just clear the counter.  Can someone
>>tell me if this will work or have any suggestions/improvements?

  This is neccessary only if you are writing a TSR (memory resident
program) or want the screen saver to act as a TSR. If you are not
writing a TSR it is not neccessary (and not nice) to hook the 
interrupts. 

  Instead, write a routine in your program that gets called 
periodically (e.g., a keyboard input routine.) Inside this
routine, keep a counter of some sort, and clear the screen when
the counter exceeded a certain value. After that you just wait
for a keystroke then restore the screen. If precise timeing is
required you can use the neccessary function calls in the language
to determine the time before clearing the screen.

  Note that it is not a good idea for a screen saver routine to
completely blank the screen. A better idea is to write a message
on screen indicating what happened, and rewrite this message on
different locations periodically.

  Ya-Gui Wei