Fantasy EMS - Bugfixes and Alternate Register Sets - #235
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August 23, 2025 10:36
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LIM EMS 4.0 allows for a feature called "alternate register sets", which are sets of EMS mapping registers that can be swappable all at once. This is useful for faster multitasking as it does not require the mapping registers' contents to be copied to and from memory.
These changes add a port based API for up to four alternate register sets as well as bugfixes that smartestblob found with the original fantasy ems implementation.
( Unfortunately, the implementation of the alternate register sets leads to basically copy-and-pasting what was already an ugly, long array of page register definitions for their instantiation. If this could be shortened in some way it would be great. )