diff --git a/cpu/Makefile b/cpu/Makefile
index 63e786f..6a2f36f 100644
--- a/cpu/Makefile
+++ b/cpu/Makefile
@@ -14,9 +14,22 @@ wave: ${VVP}
 	vvp ${VVP} -lxt2
 	gtkwave test.lx2 gtkwave_savefile.gtkw
 
-${VVP} : ${SOURCES} ${INCLUDES}
+${VVP} : ${SOURCES} ${INCLUDES} boot_code.txt
 	iverilog -g2012 ${SOURCES} -o $@
 
 .PHONY: clean
 clean:
-	rm -f ${VVP} test.lx2
+	rm -f ${VVP} test.lx2 boot_code.txt boot_code.bin
+
+boot_code.txt:boot_code.bin
+	dd if=/dev/zero bs=1 count=256 of=boot_code.stage status=none
+	dd if=boot_code.bin of=boot_code.stage conv=notrunc,nocreat status=none
+	xxd -ps -c 2 boot_code.stage > boot_code.txt
+	rm boot_code.stage
+
+boot_code.bin:boot_code.asm
+	as86 -0 $< -b $@
+
+.PHONY: dumpas
+dumpas: boot_code.bin
+	objdump -D -b binary -m i8086 boot_code.bin
diff --git a/cpu/memory.v b/cpu/memory.v
index b33d009..2761a47 100644
--- a/cpu/memory.v
+++ b/cpu/memory.v
@@ -1,5 +1,5 @@
 module rom(input [19:0] address,output wire [15:0] data ,input rd,input cs);
-reg [15:0] memory [0:15];
+reg [15:0] memory [0:127];
 initial begin
 	$readmemh("boot_code.txt", memory);
 end