This driver was obtained at Panasonic's site. It is the DOS driver and works in the Compaq Presario CDS520 Machine. They also list a 578x.zip for Win 3.1. Just loaded in a modified Windows 98 startup disk and now able to load W98 from CD Rom.
The following files are found inside the driver download file.
|57XOS2.EXE||47.4 KB||26 Jul 1996|
|57XDOS.EXE||53.4 KB||26 Jul 1996|