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Genius G540 EPROM programmer: what’s inside and initial startup

Buying a G540 programmer

I have been collecting old EPROM chips for many years. Now I was curious what data these hold exactly. I am not looking for program data but more for character maps, hidden “Easter eggs” . Something like this Hack a day[1] post.

So I went to ebay an bought one of this widespread available “Genius G540[2]” EPROM programmers. Continue reading Genius G540 EPROM programmer: what’s inside and initial startup


  1. Hack a day on hidden photographs in old Mac ROM chips  
  2. G540 programmer on ebay