AS = as86
LD = ld86
CC = bcc
CFLAGS = -0
LDFLAGS = -0 ##-M


.SUFFIXES: .S .o

.S.o:
	$(AS) -o $@ $<

all: display.bin README.FreeBSD

# The .com file is only to shortcut the development cycles when
# modifying something, you won't have to reboot pcemu with the
# new image over and over again.
#
#all: display.com

display.com: display.o text.o crt0.o
	$(LD) $(LDFLAGS) -T 0x100 -o display.tmp crt0.o display.o text.o
	dd if=display.tmp of=$@ ibs=32 skip=1
	rm -f display.tmp

display.bin: display.o text.o lcrt0.o xcrt0.o
	$(LD) $(LDFLAGS) -T 0x7c00 -o display.tmp \
		lcrt0.o display.o text.o xcrt0.o
	dd if=display.tmp of=$@ ibs=32 skip=1 obs=720k conv=osync
	rm -f display.tmp

# o expand the tabs
# o translate german ISO characters into IBM437
# o finally convert all this into assembler .ascii/.byte pseudoinstr's
#
text.S: help.txt txt2asm.perl
	expand < help.txt |\
	tr '\344\366\374\304\326\334\337' '\204\224\201\216\231\232\341' |\
	perl txt2asm.perl > $@

# maintain the README.FreeBSD from the help.txt
# looks magic, 'eh? :^)
# The readme consists of everything from section 1 up to before the
# headline of section 3.  The highlighting characters will be removed.
#
# If you've never been using Perl before, don't worry.  Let the lines
# below stand as they do. :-)
README.FreeBSD: help.txt Makefile
	perl -e 'print "This is an excerpt of what you can see with";\
		print " the standalone \"system\".\n -- J\366rg\n\n\n";\
		while(<>) {last if /^[\001-\010\013-\037]1\./;}\
		do {tr[\001-\010\013-\037]//d; print;}\
		while(($$_=<>) && !m/^[\001-\010\013-\037]3\./);' \
	< help.txt > $@

reallyclean: clean
	rm -f display.bin README.FreeBSD

clean:
	rm -f *.tmp *~ *.core *.o *.s display.com text.S

pack: all clean
	rm -f ../../../files/bootstrapper.uu ../../../files/README.FreeBSD
	gzip --best --force display.bin
	uuencode display.bin.gz display.bin.gz > ../../../files/bootstrapper.uu
	cp -p README.FreeBSD ../../../files/README.FreeBSD
	rm -f display.bin.gz README.FreeBSD


unpack:
	rm -f display.bin README.FreeBSD
	uudecode ${FILESDIR}/bootstrapper.uu
	gunzip --force display.bin.gz
	cp -p ${FILESDIR}/README.FreeBSD README.FreeBSD