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[[Image:2018-09-03-IIgs_ROM1_Adapter-Face-Wiki.png|thumb|Apple IIGS ROM1 Adapter<br>Current version from ReActiveMicro|link=https://wiki.reactivemicro.com/i ...wer software like GS/OS. It's user installable, and removable in case the IIGS needs to be downgraded. And unlike other solutions, this one does not bloc ...