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- $INCLUDE: 'C:\FG\INTRFACE.FOR'
-
- PROGRAM MAIN
-
- INTEGER*4 ORIGINAL, MEM0, MEM1, MEM2
- INTEGER*2 MODE, OLD_MODE
- INTEGER*2 STATUS
- INTEGER*4 FG_MEMAVAIL
- INTEGER*2 FG_ALLOCATE, FG_FREEPAGE
- INTEGER*2 FG_GETMODE, FG_TESTMODE
-
- WRITE(6,*) 'Which video mode?'
- READ(5,*) MODE
-
- IF (FG_TESTMODE(MODE,0) .EQ. 0) THEN
- STOP 'Your system does not support that video mode.'
- ELSE IF (FG_TESTMODE(MODE,3) .EQ. 0) THEN
- STOP 'Your system does not have enough memory.'
- END IF
-
- ORIGINAL = FG_MEMAVAIL()
- OLD_MODE = FG_GETMODE()
- CALL FG_SETMODE(MODE)
- MEM0 = FG_MEMAVAIL()
- STATUS = FG_ALLOCATE(1)
- MEM1 = FG_MEMAVAIL()
- STATUS = FG_ALLOCATE(2)
- MEM2 = FG_MEMAVAIL()
-
- STATUS = FG_FREEPAGE(1)
- STATUS = FG_FREEPAGE(2)
- CALL FG_SETMODE(OLD_MODE)
- CALL FG_RESET
-
- WRITE(6,*) 'origanally =', ORIGINAL
- WRITE(6,*) 'after setmode =', MEM0
- WRITE(6,*) 'after 1st page =', MEM1
- WRITE(6,*) 'after 2nd page =', MEM2
- WRITE(6,*) 'at end =', FG_MEMAVAIL()
-
- STOP ' '
- END