I'm running NetBSD 1.1.  I dropped in com.c 1.65 from -current to
get the latest Hayes ESP code, but I can't seem to talk to anything
attached to the card.  The dmesg line says

com2 at isa0 port 0x3e8-0x3ef irq 7: ESP, 1024k fifo

I put the flags local and rtscts in /etc/ttys.  I tried to connect to
the port with cu, and after typeing the first character, it said

cu: write: Input/output error

Does anybody have any ideas?