This zip file contains information about software drivers and installation procedures.
The QD6580 driver version is Ver.3.7. The driver adds enhanced IDE mode 4
There are four drivers in the zip file
1.QD6580.SYS DOS enhanced driver
2.QDICTRL.386 WINDOWS 3.1 or 3.11 enhanced driver
3.QDI1S506.ADD OS/2 2.1 enhanced driver
4.ATDISK.SYS WINDOWS NT enhanced driver