added rules for constructing hard disk images (better(?) for usb sticks)

diff --git a/Makefile b/Makefile
index 1a2fcb4..2055efd 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -11,7 +11,12 @@ LDFLAGS = -m elf_i386 -T game.ld -print-gc-sections
 QEMU_FLAGS = -fda floppy.img -serial file:serial.log -d guest_errors
 
 .PHONY: all
-all: floppy.img
+all: floppy.img disk.img
+
+disk.img: boot.img blank.img
+       cp blank.img $@
+       dd of=$@ if=$< conv=notrunc
+       dd of=$@ if=blank.img bs=1 seek=440 skip=440 count=70 status=none conv=notrunc
 
 floppy.img: boot.img
        dd of=$@ if=/dev/zero bs=512 count=2880
@@ -20,6 +25,10 @@ floppy.img: boot.img
 boot.img: bootldr.bin $(bin)
        cat $^ >$@
 
+blank.img: Makefile
+       dd if=/dev/zero of=$@ bs=512 count=8192
+       echo start=2048 type=c | sfdisk $@
+
 bootldr.bin: $(elf)
        objcopy -O binary -j '.boot*' $< $@
 
@@ -65,7 +74,7 @@ sym: $(name).sym
 tools/csprite/csprite:
        $(MAKE) -C tools/csprite
 
-data/sprsheet.inc: data/sprsheet.png
+data/sprsheet.inc: data/sprsheet.png tools/csprite/csprite
        tools/csprite/csprite -n sprsheet -s 32x32 $< >$@
 
 #data/sprsheet.inc: data/sprsheet.png