can read character from keyboard now

boot/Makefile

@@ -1,19 +1,25 @@
-include ../*.inc
+SDIR ?= ../
+BDIR ?= ./
 
-PROG=boot
-CSRCS= $(wildcard *.c)
-SSRCS= $(wildcard *.S)
-OBJS = $(SSRCS:.S=.o) $(CSRCS:.c=.o)
+PROG = boot 
+SRCS = srt0.S gdt.S boot.c
+OBJS = srt0.o gdt.o boot.o
 
-CFLAGS+=-c -fno-pie
-CPPFLAGS+=-nostdinc -DLOADADDR=$(LOADADDR) -DLINKADDR=$(LINKADDR) -DBOOTMAGIC=$(BOOTMAGIC)
-LDFLAGS+= -s -T ld.script -Ttext=$(LINKADDR) --no-omagic -M
+ESRCS = console.c print.c a20.c
+OBJS += $(ESRCS:.c=.o)
+
+include $(SDIR)/Makefile.inc
+
+CFLAGS += -no-pie 
+CPPFLAGS += -DLOADADDR=$(LOADADDR) -DLINKADDR=$(LINKADDR) -DBOOTMAGIC=$(BOOTMAGIC) -DBOOTSTACKOFF=$(BOOTSTACKOFF)
+CPPFLAGS += -I $(SDIR)
+LDFLAGS += -s -Ttext=$(LINKADDR) -T ld.script --no-omagic -M
 
 ${PROG}: $(OBJS)
 	@rm -f $(PROG)
 	$(LD) $(LDFLAGS) -o $(BDIR)/$(PROG) $(OBJS)
 
-$(OBJS): conf.h pio.h
+$(OBJS): $(SDIR)/u.h def.h dat.h fn.h
 
 clean:
-	rm -f $(PROG) $(PROG).bin *.o
+	rm -f $(PROG) $(OBJS)