Symbol: ZSWR10_UNDERRUN_ABORT
usr/src/uts/sun/io/zs_hdlc.c
1211
SCC_BIS(10, ZSWR10_UNDERRUN_ABORT); /* abort on underrun */
usr/src/uts/sun/io/zs_hdlc.c
1503
SCC_BIC(10, ZSWR10_UNDERRUN_ABORT);