This page describes a project to create a CompactFlash / IDE Interface card for Apple II computers. The card is ProDOS 8 compatible, and GS/OS compatible with an extra driver. I did the original wire-wrap prototype over the span of several months. This project is very much a case of old technology (the Apple II computer) meets new (CompactFlash cards and Altera CPLDs).
It’s always impressive to see what a computer geek with some time on their hands can come up with.