[rescue] Sun SpeakerBox Docs

[Don Y]

Janet Campbell wrote:
> On Sun, 18 Jun 2006, Don Y wrote:
> 
>> I want to *almost* use it as intended but without having to stick
>> to Sun's I/F -- though I may not have any choice, there (due to
>> their choice of components).  But, I want/need to know how
>> many of the "controls"/indicators are independant vs. hardwired,
>> etc.  (e.g., the power indicator, etc.)
> 
> I'm pretty sure that all of the controls and indicators go through the 
> bus to the host, including the power light.
> 
> The CHI bus was pretty neat at the time - in theory you could string up to 
> four devices along it, and have mostly-independant codecs handling their 
> own sound streams.  I don't think that Sun ever added support for more 
> than one, though - the LX had an onboard codec and could use the 
> speakerbox one if it was plugged in, but didn't use both simultaneously.
> 
> There's enough documentation on the bus to use it if you really want to, 
> given a sync parallel bus to interface with - it'd likely be a first-class 
> pain, though.

Yeah, I was hoping to bypass the CODEC and take advantage of
all the peripheral circuitry -- i.e. remove the CODEC and
run pigtails to those foils.  Hence the advantage of having
a schematic!

But, I can probably *infer* what's connected to those pins
and get a "90% solution" without too much effort.  Shirley
less than would be involved trying to trace all the foils
on the board(s)!