GS-RAM

Up to 1.5 MEG on one card in 256Kx1 increments. A fully expanded GS-RAM operates at only 375 ma for extremely low power consumption. With an optional piggyback card, GS-RAM can be expanded even higher than 1.5 MEG, and is fully DMA (direct memory access) compatible.
Diagnostic software was part of the A2 Appleworks Expander 2.52 disks.
GS-RAM
GS-RAM - rev A
GS-RAM - rev D
GS-RAM - rev F
GS-RAM 2 Meg Expander
GS-RAM 2 Meg Expander - new revision
Manuals & files
Opens on ae.applearchives.com (not rehosted here).
Source page: https://ae.applearchives.com/apple_iigs/gs_ram/