Module Name:	syssrc
Committed By:	chopps
Date:		Tue Jan  4 06:36:30 UTC 2000

Modified Files:
	syssrc/sys/dev/ic: hd64570.c hd64570reg.h hd64570var.h

Log Message:
convert to support non-dma IO (for the isa Riscom/N2).
allow the user to set and use the internal baud rate generator
fix the transmission ring logic to support more than 1 frame per interrupt
add autodetection of the base clock frequency.
cleanup the receive ring logic
support dynamically resizing the low-water mark on the fifo in response
	to buffer underruns on transmit.


To generate a diff of this commit:
cvs rdiff -r1.7 -r1.8 syssrc/sys/dev/ic/hd64570.c
cvs rdiff -r1.2 -r1.3 syssrc/sys/dev/ic/hd64570reg.h \
    syssrc/sys/dev/ic/hd64570var.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.