Module Name:	src
Committed By:	wrstuden
Date:		Mon Nov 23 22:10:10 UTC 1998

Modified Files:
	src/sys/dev/ic: z8530tty.c
Log Message:
Changes to deal with mac serial ports having clock sources on DCD or CTS.

- When doing a first open, don't enable receive & status interupts before
the MD layer has had a chance to set things up.
- Enable logic to only enable DCD/CTS interupts if we are looking for/
expecting interupts on those pins. Disable otherwise.
- in zs_param, only pass up the state of ZSRR0_DCD if we have enabled
interupts on that pin.

Henry Hotz (<hotz@jpl.nasa.gov>) and Greg walsh <gwalsh@artec.com> have
tried these changes to get certain printers from hanging at boot. They
work in a 1.3.2 kernel for Greg.