Hello, I am trying to set a computer running FreeBSD 4.8-STABLE so that it can boot using a serial console. To this effect I am trying to compile new boot blocks, but I get this error: casa# cd /usr/src/sys/i386/boot/biosboot && make cc -O2 -malign-functions=0 -malign-jumps=0 -malign-loops=0 -DBOOTWAIT=5000 -DTIMEOUT= -DBOOTSEG=0x1000 -DBOOTSTACK=0xFFF0 -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual -fformat-extensions -ansi -DCOMCONSOLE=0x3F8 -DCONSPEED=115200 -mpreferred-stack-boundary=2 -aout -nostdinc -I/usr/src/sys/i386/boot/biosboot/../../../../include -I/usr/src/sys/i386/boot/biosboot/../../.. -I/usr/src/sys/i386/boot/biosboot -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual -fformat-extensions -ansi -N -T 0 -nostdlib -static -o boot start.o table.o boot2.o boot.o asm.o bios.o serial.o probe_keyboard.o io.o disk.o sys.o serial.o: Undefined symbol `COMBRD' referenced from text segment serial.o: Undefined symbol `COMBRD' referenced from text segment *** Error code 1 Stop in /usr/src/sys/i386/boot/biosboot. casa# Can any one please help? federico