I have an Apple IIc with 128 KB of RAM, about half of which goes unused. Since the IIc has only one drive, it would be convenient to use some of that unused RAM as a RAM disk. I know that this is available for ProDOS, but I use DOS 3.3. (And no, for various reasons I do not wish to switch to ProDOS.) Is there any RAM disk software or support currently available for DOS 3.3 systems?
For many questions in the early days, the answer was Beagle Brothers. In this case DiskQuik.
DISK DRIVE EMULATOR by HARRY BRUCE and GENE HITE
(REQUIRES APPLE IIe WITH EXTENDED 80-COLUMN CARD)
AN IN-MEMORY "DISK DRIVE"
DiskQuik acts like a disk drive connected to Slot 3, but it is much faster, quieter and more reliable.
In 1982 there was a product made by Sorrento Valley Associates called the App-l-Cache. It was both a language card and a ram disk. The nice thing is they gave you the source code to all the drivers. So if you know how to access the ram on the ii C maybe you can write a quick ram disk driver following their lead. All info on my git hub page https://github.com/pfiliberti/app-l-cache/