Using flashable Macintosh ROM SIMM

David Griffith dave at
Tue Apr 26 17:44:05 CDT 2016

I have a "MACSIMM" from GGLabs ( which I bought from 
their Ebay store.  Unfortunately they haven't followed up on my request 
for information on how to prepare a ROM image for use with the thing.  Has 
anyone else here used this or a similar device to hack the ROMs of the Mac 
SE/30, IIsi, IIci, or IIfx?  It's composed of four 39SF010A 32-pin PLCC 
chips the special 64-pin SIMM.

David Griffith
dave at

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