RAMFast Revision D by Sequential Systems (1994)

The RAMFast Revision D SCSI Card used DMA and an onboard RAM cache to make it the fastest SCSI interface produced for the Apple II. The standard 256 KB cache can be upgraded to 1 MB. The card supports up to 12 partitions per drive and allows up to 12 partitions to be active at one time. If you have more than 12 partitions, they can be "switched" to allow access to all of the volumes. Partitions can be mapped to ProDOS 8 "virtual" slots. A ROM disk on the card contains the GS/OS driver and utility software for partitioning, formatting, backing up, switching and mapping volumes. Pressing a number key from 1 to 9 at startup selects the logical drive to boot from. Pressing 0 (zero) at startup enters the utility program on the ROM disk.

Note that there is a bug in ROM version 3.01e that will trash your hard drive if you use the RAMFast Utilities built-in backup function.

(Photo Courtesy of JM Boutillon)

RAMFast Revision C by C.V. Technologies (1990)

An earlier version of the RAMFast, revision C, was produced by C.V. Technologies. The revision C card is a "full-length" expansion card. It supported up to 8 partitions and allowed them to be mapped to other slots.

Like the Revision D, the Revision C card had a built-in ROM disk that held the GS/OS driver and the RAMFast Utilities program.

The Revision C card has DIP switches for setting the termination power, ROM select, Machine type, DMA compatibility, IIgs motherboard type, ROMdisk disable, and drive search timeout. (Note that the Revision D card does not have DIP switches. These functions are handled through the RAMFast Utilities or are not required.)