[Coco] Question re: Cart slot decode

[Roger Taylor]

At 07:16 PM 2/2/2009, you wrote:
>On Mon, 2 Feb 2009, Darren A wrote:
>
>>>On Mon, 2 Feb 2009, Stephen Castello wrote:
>>>
>>>I guess that settles it.  There's a considerable quantity of erroneous
>>>information out there, as I read about four different resources that claim
>>>the SCS range is ff40-ff5f.
>>
>>---
>>
>>Settles what?
>>
>>The SCS range is FF40 - FF5F.
>
>I was confusing myself.  I understand now that the SCS range is 
>FF40-FF5F, but all accesses between FF40-FF7F will enable the bus 
>transceiver on the MPI and allow data flow back and forth. (As will 
>assertion of CTS* and/or SLENB*).
>
>Wrong terminology on my part.  The fact that other types of hardware 
>sit above FF5F is orthogonal to the fact of where the SCS are lies.
>
>I'm still learning the CC3.  If this were an Apple 2, I'd have this 
>level of detail engraved on the inside of my eyelids :-).
>
>Steve



Can't a pak also just decode directly from the address lines?  Aren't 
the SCS and CTS signals just shortcut decoders and also annoying in 
that they ghost the addresses?



-- 
Roger Taylor

http://www.wordofthedayonline.com