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52 lines
2.5 KiB
QBasic
52 lines
2.5 KiB
QBasic
' PQBC Screen Tester
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'-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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' This program looks big, but it is actually quite small. Run it through a
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' decommenter to see how small it is. Anyway, this program tests what screen
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' modes your graphics adapter supports. You can find one included with the
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' QuickBasic 4.5 examples, but this one is easier to manipulate and more
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' effective. This lists all the screen modes your computer supports, instead
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' of just a few. The REMs show the variables that can be manipulated.
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' This program is free to distribute as long as these first 12 lines of
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' comments are NOT removed and/or changed.
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' If you have questions/comments/suggestions, contact me at:
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' patz2009@yahoo.com
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REM Variables
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REM ------------------------
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REM works > a supported screen mode
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REM nogo > error handling variable
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REM test > the screen mode being tested
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REM list$ > list of supported modes
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'-------------------START-OF-PROGRAM---------------------------------
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ON ERROR GOTO handler
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works = 50 ' Later replaced by the first working mode
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test = 1 ' Activates first mode to test (start at
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' 1 to test all screen modes)
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starttest:
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IF test = 14 THEN GOTO ender ' Ends since there is no SCREEN 14
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IF nogo = 0 THEN SCREEN test ' Core tester - activates a screen mode
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IF nogo = 0 THEN LET list$ = list$ + "," + STR$(test) ' Creates a list of
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' working screen modes.
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IF nogo = 0 AND works = 50 THEN LET works = test ' Generates a working screen
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' mode to display working
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' mode numbers.
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nogo = 0 ' Replaces error handler.
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test = test + 1 ' Tests a new screen mode.
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GOTO starttest ' Restarts the test.
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'----------------Display-working-screen-modes----------------------
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ender:
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SCREEN works ' Uses a working graphics mode.
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PRINT "Your graphics adapter supports screen" ' Displays your working
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PRINT "modes 0"; list$; "." ' screen modes.
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' NOTE: All graphics adapters support SCREEN 0
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END
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'------------------Error-handling-variable-activater---------------
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handler:
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LET nogo = 1 ' Activates the error handling variable.
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RESUME NEXT
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'----------------------------------------------------------------- |