diff --git a/src/fib.z80 b/src/fib.z80
index 06cabed..f90c789 100644
--- a/src/fib.z80
+++ b/src/fib.z80
@@ -1,7 +1,15 @@
-.org $0000
+_ram_start equ 0x1000
+
+#target rom
+
+#code _HOME, 0          ; Non-banked part of memory
+
+#data _DATA, _ram_start ; Uninitialized variables
+
+#code _HOME
 main:
 init:
-	ld hl, out
+	ld hl, _DATA
 
 	ld a, (amount)
 	ld d, a
@@ -25,7 +33,7 @@ loop:
 	jp nz, loop
 
 verify_init:
-	ld hl, out
+	ld hl, _DATA
 
 	ld a, (amount)
 	ld d, a
@@ -40,12 +48,6 @@ verify:
 done:
 	halt
 
-
-amount:
-	.db 10
-x:
-	.db 0
-y:
-	.db 1
-
-out .equ $1000
+amount: db 10
+x: db 0
+y: db 1