WD1007A-WAH
     
                                   DESCRIPTION
     
     The WD1007A-WAH controller interfaces up to two ESDI Winchester disk 
     drives with IBM PC/AT and compatibles.  Look-ahead caching and 1:1 
     interleave significantly improve data through-put and reduce disk 
     access time.  The feature 1 (F001) version includes the optional BIOS 
     which features shadow RAM.  This shadow RAM feature allows the WFDC 
     to interface with all types of ESDI drives without modifying the 
     system BIOS.  Option jumpers allow the BIOS to be mapped at one of 
     four address ranges.
     
     The following is a list of common ESDI drives and their manufacturers 
     which have been reported to be compatible with the WD1007A-WAH 
     controller:
     
     
     
     Controller:  WD1007A-WAH
     
     Drive                                  Formatted Capacity
     
     Toshiba         - MK153FA              74 Megabyte
                     - MK154FA              104 Megabyte
     
     Maxtor          - XT-4080E             338 Megabyte
     
     Micropolis      - 1353                 79 Megabyte
     
     CDC              - WREN III            106 Megabyte