On Sun, 2002-12-29 at 13:20, Uwe Hees wrote: > I have #defined all debugging symbols an compared the debugging output > of a simple "echo at > /dev/ttyS0" on both machines, the C600 and the > G3. Unfortunately there is no significant difference. > > Is somebody out there who can either reply "I have seen this problem > before" or "The serial port runs fine on my C600"?
It could be the line drivers not beeing properly enabled. Those are controlled by "magic" bits in the mac-io ASIC. I don't know the details about the C600, can you send me a tarball of /proc/device-tree and the output of /proc/cpuinfo please ? Also, if you have MacOS (old one, not X), please install MacsBugs and do a "dm f3000038" in it and tell me the resulting value, when both the serial port is closed and opened. Ben.
