49 		mov dx,msg_ancient_err  define
106 		mov di,FileName  define
162 		mov dl,[DriveNo]  define
170 		mov dx,[bx+dpbSectorSize]	; Save sector size  define
185 		mov ds,ax  define
209 		mov dx,FileName  define
219 		mov dx,SectorBuffer  define
240 		mov dx,msg_filesystem_err  define
243 		mov dx,msg_read_err  define
246 		mov dx,msg_write_err  define
251 		mov dx,msg_error  define