TC: int randbrd( struct fcb *fcbptr, int reccnt )

	- prototype in dos.h

	- randbrd() reads reccnt number of records using the open FCB via
	  fcbptr, as indicated by the disk record field of the FCB (via
	  INT 21,27)
	- returns:
	  0  all records read(written)
	  1  EOF reached & last record read is complete
	  2  reading records would have wrapped around address 0xffff
	  3  EOF reached & last record is incomplete
	- see	randbrw()