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17-01.FOR
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1995-01-20
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$INCLUDE: 'C:\FG\FASTGRAF.FI'
PROGRAM MAIN
INTEGER*4 ORIGINAL, MEM0, MEM1, MEM2
INTEGER MODE, OLD_MODE
INTEGER STATUS
INTEGER FG_ALLOCATE, FG_FREEPAGE, FG_GETMODE
INTEGER FG_SVGAINIT, FG_TESTMODE
INTEGER*4 FG_MEMAVAIL
WRITE(6,*) 'Which video mode?'
READ(5,*) MODE
CALL FG_INITPM
STATUS = FG_SVGAINIT(0)
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