At
The Big Book of Amiga hardware there's a disk called "Test and Demo Software for the Commodore A2320 (Amber) scandoubler and FlickerFixer" available for download - that's probably what you are searching for (the A3000's onboard sd/ff is practically identical to the A2320).
Goto "Drivers and installation", then scroll down to the "Gfx_Video_NonRTG" paragraph.
