Re: "Co-Processor" Apple ?

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

Wayne Stewart replied:

>Michael J. Mahon wrote:
>
>> Very interesting, Wayne.
>> 
>> Is there any information on how the TransWarp slows down
>> temporarily when accessing a 5.25" disk, for example?
>> 
>> I'm looking for things that _all_ accelerators had to support
>> to minimize the number of different approaches.
>
>It doesn't mention any software method of doing that, maybe because it 
>wasn't felt neccessary. There's a switch for every slot and that decides 
>if the Transwarp slows down to access that slot.

Hmm--an unfortunate lack of technical documentation...  ;-(

I suppose it would be necessary to do experiments to verify that
it uses the "slow down for x milliseconds whenever a slot y device
select address is referenced" approach.  But it's hard to imagine
a generally useful approach that could work otherwise for any
card in any slot.

The speaker and paddle trigger are a couple of other usual
"slowdown" candidates, though perhaps for shorter periods.

-michael

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