Re: Have any of you put this chip in your //gs?

[mjmahon@aol.com (Michael J. Mahon)]

Roy wrote:

>Michael J. Mahon wrote:
>
>> Bill Garber wrote:
>> 
>> 
>>>Are you saying they have broken the 64K barrier on
>>>a machine with only 16 address lines? I suppose that
>>>if you were to switch at each 64KB and at each 4 MB
>>>which would be 64K of 64K, then you could go as high
>>>as you want, but you would need to go pretty fast to
>>>make it worthwhile. Ok, I'll agree that there is reason
>>>to have so much ram.
>> 
>> 
>> Actually, 4MB is just 64 x 64KB, or a 6-bit bank number.
>> 
>> Since 8-bits is a convenient size, a typical extended banking
>> scheme will permit 256 x 64KB, or 16MB of memory.
>> 
>> RAMWorks and similar cards use such an 8-bit bank number,
>> and the design naturally extends to 16MB.
>
>Correct me if I'm wrong, but didn't the AE cards basically just work 
>with the AUX bank? Nah, that can't be right!

If you mean, was the AE bank number only used when the
//e AUX bank was selected, the answer is yes.

So the //e with an AE card has a two-level bank switched solution:
the //e softswitches control bank switching between main and AUX,
and the AE extension controls bank switching _within_ the AUX
bank.

-michael

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