Subject: Re: iceBook ttyS1?
From: Timothy A. Seufert (tas@mindspring.com)
Date: Sun Nov 25 2001 - 00:37:12 MST
At 9:23 AM -0800 11/22/01, Romain Kang wrote:
>My curiousity is killing me. On the iBook dual USB (500 MHz),
>ttyS0 goes to the modem. Where does ttyS1 go?
>
>Nov 22 02:01:22 localhost kernel: ttyS0 at 0xd98dc020 (irq = 22) is
>a Z8530 ESCC (cobalt modem)
>Nov 22 02:01:22 localhost kernel: ttyS1 at 0xd98e3000 (irq = 23) is
>a Z8530 ESCC
The Z8530 ESCC serial controller has two channels. Apple has been
using it for a long time, and they aren't about to switch to a
different controller now. Since Apple decided many Macintosh designs
ago to kill legacy I/O ports, they simply don't use the second
channel.
-- Tim Seufert
This archive was generated by hypermail 2a24 : Sun Nov 25 2001 - 00:50:03 MST