41 MCODE - Copying bank-switched pages

[Ángel Martin]

(10-12-2014 11:00 PM)Monte Dalrymple Wrote:  The only way that I can think of to do something like this would be to reserve a RAM page to hold some kind of "valid" bit corresponding to each RAM page. You would need to manually set/clear the bits as you used pages though. Conceptually it's not much different from what I do in the Image Database and the Flash Database.

How about a reserved memory area with a bit set/clear status toggled or edited with any PLUG/Unplug action? That'll be just 122 bits (each one representing the latest action on each of the RAM block 0x805 up to 0x87F), so could be allocated within block 0x804 perhaps.

The updating could be done as part of the PLUG code - I guess.