MAP-80 256K RAM Card
This high density memory card was the first from MAP-80 Systems. It has the dubious privilege of having the most complex configuration of just about any card devised. Follow the documentation, it works, don't and it will never work! The card supports all Nascom / Gemini addressing modes making it compatible across the range.
One odd item on this card is the support for address line A19 to give 1MB of address space. The 80-BUS does not have this line allocated so one of the unused lines was used, much to the annoyance of Gemini from a compatibility point of view.
Technical Details
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