#366 Fixes for breakage caused by 2Kb page size change

[Fredrick Meunier]

The change to the 2K memory page size ([r5223]) missed several assumptions made about MEMORY_PAGE_SIZE, particularly in the snapshot code.

This patch has the fixes I've identified from doing an audit of the code using the MEMORY_PAGE_SIZE macro. I've tested the IF2 support so far, Beta 128, Opus, +D and IF1 TODO (any help welcome).

[Fredrick Meunier]

New patch with fixed saving of IF1 with custom ROMs.

Beta 128, Opus and +D TODO

[Fredrick Meunier]

Now tested Beta 128 and +D with good results, Opus snaps with custom ROMs look bad though.

Opus TODO

[Fredrick Meunier]

This patch makes IF1 look better (we will just save 8K IF1 ROM images and only load the first 8K of a saved ROM as that is all we support anyway).

Opus still TODO

[Sergio Baldoví]

There is a bug when uncompressing the opus custom rom. I guess the function was copied from plusd, where ROM and RAM have the same size.

[Fredrick Meunier]

Thanks Sergio, that looks good now - I think we can commit the lot and will be OK to close this one.

[Fredrick Meunier]

Committed in [r5501], [r5502], [r5503] and [r5504].