diff --git a/programs/boot.vc5asm b/programs/boot.vc5asm
index 61df3e7..e0bfff9 100644
--- a/programs/boot.vc5asm
+++ b/programs/boot.vc5asm
@@ -75,13 +75,20 @@ key_press_int:
 
     mov [rsp], r1
     add rsp, 2
-    call print_char
+    call term_putc
     sub rsp, 2
 
 .leave:
     reti
 
-print_char:
+const term_width 20
+
+term_y:
+    dw 0
+term_x:
+    dw 0
+
+term_putc:
     mov [rsp], rbp
     add rsp, 2
     mov rbp, rsp
@@ -139,7 +146,7 @@ print_u16:
 
     mov [rsp], r0
     add rsp, 2
-    call print_char
+    call term_putc
     sub rsp, 2
 
     mov r2, [rsp-2]