			CHK - Calculate Checksums
			=========================

 CHK   is  a  small  program  designed  to  calculate  Files-11  block
 checksums.  the format of a request to CHK is:-

	CHK Filespec/CK:blknum

 where  Filespec  is  the  specifier  of the file containing the block
 whose  checksum  is  to  be  calculated, and blknum is the number (in
 octal) of the block itself.


 The main use of CHK is to calulate File Header checksums when zapping
 fileheaders  in  [0,0]INDEXF.SYS,  but  it  may  be used anywhere the
 standard Files-11 checksum method is used.
