Charlie wrote:
> "David Empson"  wrote in message 
> news:1ivk1t0.1hybb3evsti5lN%dempson{at}actrix.gen.nz...
> 
>>vladitx  wrote:
> 
> 
>>SNIP <
> 
> 
>>>3) IIgs maximum RAM - banks $00 .. $7F are specified as RAM range.
>>>This makes exactly 8MB. But the manuals keep saying 8.25MB. What is
>>>the truth and where those 256KB came from?
>>
>>Anything saying 8.25 MB is simply wrong. The correct figure is 8.125 MB
>>(8 MB plus 128 KB).
>>
>>The extra 128 KB is the "slow" memory in banks $E0 and $E1.
>>
> 
> 
> Isn't there another 128KB of RAM dedicated to the sound generation chip?

That's 64K.

-michael

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