Unlike other memory expansions, Gemini tracks the ASIC unlocking and mapping, and disables itself for the 4000-7FFF range when the ASIC is mapped there. This avoids memory corruptions for software that uses the ASIC and extended memory at the same time.
[http://shinra.cpcscene.net/gemini.html Gemini expansion on Shinra Official website]
[[Category:Memory expansions]]
[[Category:Peripherals]]