diff --git a/build.sh b/build.sh
index 43bd5d2..851f2ca 100755
--- a/build.sh
+++ b/build.sh
@@ -14,6 +14,7 @@ then
 	echo "Formatting.."
 	clang-format -i src/uxn.h
 	clang-format -i src/uxn.c
+	clang-format -i src/devices/system.c
 	clang-format -i src/devices/screen.h
 	clang-format -i src/devices/screen.c
 	clang-format -i src/devices/audio.h
@@ -62,8 +63,8 @@ fi
 
 echo "Building.."
 ${CC} ${CFLAGS} src/uxnasm.c -o bin/uxnasm
-${CC} ${CFLAGS} ${CORE} src/devices/file.c src/devices/mouse.c src/devices/controller.c src/devices/screen.c src/devices/audio.c src/uxnemu.c ${UXNEMU_LDFLAGS} -o bin/uxnemu
-${CC} ${CFLAGS} ${CORE} src/devices/file.c src/uxncli.c -o bin/uxncli
+${CC} ${CFLAGS} ${CORE} src/devices/system.c src/devices/file.c src/devices/mouse.c src/devices/controller.c src/devices/screen.c src/devices/audio.c src/uxnemu.c ${UXNEMU_LDFLAGS} -o bin/uxnemu
+${CC} ${CFLAGS} ${CORE} src/devices/system.c src/devices/file.c src/uxncli.c -o bin/uxncli
 
 if [ -d "$HOME/bin" ]
 then
diff --git a/src/devices/system.c b/src/devices/system.c
new file mode 100644
index 0000000..3b76b5d
--- /dev/null
+++ b/src/devices/system.c
@@ -0,0 +1,23 @@
+#include "../uxn.h"
+
+#include <stdio.h>
+
+/*
+Copyright (c) 2022 Devine Lu Linvega, Andrew Alderwick
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE.
+*/
+
+static const char *errors[] = {"underflow", "overflow", "division by zero"};
+
+int
+uxn_halt(Uxn *u, Uint8 error, char *name, Uint16 addr)
+{
+	fprintf(stderr, "Halted: %s %s#%04x, at 0x%04x\n", name, errors[error - 1], u->ram[addr], addr);
+	return 0;
+}
diff --git a/src/uxncli.c b/src/uxncli.c
index 5b8d1dc..692ed6c 100644
--- a/src/uxncli.c
+++ b/src/uxncli.c
@@ -115,15 +115,6 @@ nil_deo(Device *d, Uint8 port)
 
 #pragma mark - Generics
 
-static const char *errors[] = {"underflow", "overflow", "division by zero"};
-
-int
-uxn_halt(Uxn *u, Uint8 error, char *name, Uint16 addr)
-{
-	fprintf(stderr, "Halted: %s %s#%04x, at 0x%04x\n", name, errors[error - 1], u->ram[addr], addr);
-	return 0;
-}
-
 static int
 console_input(Uxn *u, char c)
 {
diff --git a/src/uxnemu.c b/src/uxnemu.c
index e7455bd..8aaba28 100644
--- a/src/uxnemu.c
+++ b/src/uxnemu.c
@@ -410,15 +410,6 @@ do_shortcut(Uxn *u, SDL_Event *event)
 		restart(u);
 }
 
-static const char *errors[] = {"underflow", "overflow", "division by zero"};
-
-int
-uxn_halt(Uxn *u, Uint8 error, char *name, Uint16 addr)
-{
-	fprintf(stderr, "Halted: %s %s#%04x, at 0x%04x\n", name, errors[error - 1], u->ram[addr], addr);
-	return 0;
-}
-
 static int
 console_input(Uxn *u, char c)
 {