This is what I found to work for this card. I can't guarantee it will work in all cases but found that this driver will most likely get your AVA-1502 SCSI card working. It is ment for the "Adaptec AHA 152x/AHA-1510 SCSI Host Adapter"
Already tried it? Give your review.
The following files are found inside the driver download file.
|WIN1520.EXE||82.8 KB||5 Nov 1991|
|README.TXT||1.9 KB||11 May 1992|
|SHOWSCSI.EXE||23.9 KB||11 May 1992|