[Coco] GIME DRAM address mappings

[RETRO Innovations]

On 9/28/2017 7:58 AM, Robert Gault wrote:
> Jim,
>
> This is outside of my area of knowledge but your description doesn't 
> seem quite the same as that in the Coco3 service manual. I could be 
> wrong. :)
>
> Page 15-  Memory Management Unit (MMU)
> This only deals with the stock 125K-512K addressing.
The information on page 15 is correct, in that the top 3 bits of the 
virtual address are mapped to the top 6 bits of the physical address.  
My information does not contradict that, it only states that the 
multiplexed address lines come out slightly different from the GIME.
>
> Page 97  Pin layout and rough details of the inside contents of the GIME
Can you be more specific?  I don't see any contradiction on first 
glance, but happy to be wrong.
>
> Robert
>
>

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