[Coco] [Color Computer] Coco3 GIME Chip Question

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Question regarding operation of the GIME Chip in the Coco3.

 

If $FF90 bit 6 (MMUEN) is cleared, I understand that the MMU Registers are
disabled, and ram is the logical address space from $70000 to $7FFFF.

In this case, what values are present in the MMU Registers $FFA0-$FFAF? Do
they retain their previous values? Or will they hold the values of $38-$3F

cooresponding to the $70000-$7FFFF logical address space? If this is the
case, will they revert back when MMUEN is set again?

 

-Walt Zydhek