Final cleanup

rom/extra.s

@@ -147,14 +147,6 @@ CLOSE:
 
 ; Default
 
-ISCNTC:
-        lda IO_KBD
-        cmp #$03
-        beq :+
-        rts
-:
-        jmp STOP
-
 SYS:
         jsr GTNUM
         lda LINNUM

rom/header.s

@@ -1,3 +0,0 @@
-.segment "HEADER"
-
-; Empty

rom/iscntc.s

@@ -1 +1,9 @@
-;!!! runs into "STOP"
+.segment "CODE"
+
+ISCNTC:
+        lda IO_KBD
+        cmp #$03
+        beq :+
+        rts
+:
+        jmp STOP

rom/msbasic.s

@@ -6,7 +6,6 @@
 .include "defines.s"
 .include "macros.s"
 .include "zeropage.s"
-.include "header.s"
 .include "token.s"
 .include "error.s"
 .include "message.s"