This driver is available on the Windows 95 and 98 CD-ROM, but seemingly nowhere else (including HP's website). So, if you've misplaced your Windows disk, as I did, you're in trouble. Surprisingly, the drivers for all the other 500 series Deskjets (such as the 500C, 520, etc.) were incompatible.
The following files are found inside the driver download file.
|DMCOLOR.DLL||18.3 KB||11 May 1998|
|ICONLIB.DLL||118.1 KB||11 May 1998|
|FINSTALL.DLL||188.8 KB||11 May 1998|
|UNIDRV.DLL||197.7 KB||11 May 1998|
|HPDSKJET.DRV||90.6 KB||11 May 1998|
|UNIDRV.HLP||16.0 KB||11 May 1998|
|FINSTALL.HLP||21.5 KB||11 May 1998|