Port Expander Info...?

[Ludis Langens]

daklein at netzero.net wrote:
> 
> Does anyone know how a 'port expander' works?  Reading TH's file explains
> some of it to me, but does anyone have pink book sort of info about this
> sort of chip?  Specifically how what looks like a config register for it works.

What "port expander"?  Do you mean one of the chips in a P4 ECM?  The
Intel 8243 used with Intel 8048 microcontrollers?  Something else?

-- 
Ludis Langens                               ludis (at) cruzers (dot) com
Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/
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