... Registers: ah = 42H 162 The Little Black Book of Computer Viruses al = Method of moving the pointer bx = File handle cx:dx = Distance to move the pointer, in bytes Returns: c = set if there is an error ... in one form or another 166 The Little Black Book of Computer Viruses Ray Duncan, Ed., The MS-DOS Encyclopedia (Microsoft Press, Redmond, WA) 1988, ISBN 1-55615-049-0 This is the definitive encyclopedia ... integer The methods of moving the pointer are as follows: al=0 moves the pointer relative to the beginning of the file, al=1 moves the pointer relative to the current location, al=2 moves the pointer...