The GW4401A 64-pin ROM SIMM replaces the ROM SIMM of a 
Macintosh II-series or Macintosh SE/30 computer. 
GW4401A comes preprogrammed with a customized 
Macintosh ROM which enables 32-bit clean addressing 
as well as a 1.5 MB ROM disk preloaded with System 7.0 
and various utilities.