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Int 21 Fn 25C1  P - Phar Lap 386/dos-extender - Release MS-dos Memory Blo  [E]

   AX = 25C1h
   CX = real-mode paragraph address of memory block to free

Return: CF clear if successful
       EAX destroyed
   CF set on error
       AX = error code
       07h MS-DOS memory control blocks destroyed
       09h invalid memory block address in CX

See Also: AX=25C0h,AX=25C2h
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