Posted By
Hypex
on 2019-10-29
10:02:22
|  Re: Can PLA assist in memory expansion?
@MCes
Okay I can understand now. I could see what it was doing. Just was was unclear on where and what lines it did it with.
In that case, if it involves cutting traces, I would prefer not to. Sorry, letting the team down here I guess. 
Right now, there are solutions, internally, to deal with this cleanly. By putting a board between the TED or CPU and socket to intervene the lines. This could be another way to actvate a working expansion. But, if a board is going to be sandwiched between them, then it might as well contain memory. To which you have already addressed this. 
Another way to tackle it, I thought, is for the expansion ram to leave the first 16K alone and just add another 48K. That would avoid the internal and external conflict, since both would be wired to work together. However, if the internal lines are programmed for 16K only, and to mirror the lower 16K range into all 16K ranges, then that won't work either.
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