(There's no video for RamDisk (1984) yet. Please contribute to MR and add a video now!)
RamDisk is probably the first ram disk utility for Macintosh, since it came out in 1984. It allows very simply to use some of your Mac's free RAM as a disk. RamDisk uses the disk ID # 11, therefore, make sure that there is no disk attached onto this driver ID (there shouldn't be really!)
RamDisk also offers the driver to automatically attach at boot time which is a nice automation addition.
Fun fact: RamDisk 1.0 MIGHT be related to RAMDisk 3.x since STR ressource ID #133 = "Sacrificial goat" in RamDisk 1.0 and an icon of a goat is on the ram disk made under RAMDisk 3.x but... it's uncertain.
RamDisk.sit (9.49 KiB / 9.71 KB)
RAM Disk Utility v1.0 (26 May 1984) / compressed w/ Stuffit
Warning: Since this is a very simple 1984 program, please note that it freezes the whole computer under anything above System 6.
Emulating this? It should run fine under: Mini vMac