diff --git a/src/lsi/Makefile b/src/lsi/Makefile
index 9a82cc2..7e21f0e 100644
--- a/src/lsi/Makefile
+++ b/src/lsi/Makefile
@@ -5,6 +5,9 @@ PREFIX?=	/usr/local
 OBJS=	main.o vm.o plugins.o dmx.o midi.o beatdetect.o fft.o map3d.o mouse.o
 SRCS=	main.c vm.c plugins.c dmx.c midi.c beatdetect.c fft.c map3d.c mouse.c
 
+OBJS+=	abi.o
+SRCS+=	abi.c
+
 COMMONOBJS=	mem.o hash.o
 COMMONDIR=	../common
 
@@ -20,6 +23,12 @@ PROGOBJS=	${OBJS} ${COMMONOBJS:S/^/${COMMONDIR}\//}
 lsi: ${OBJS}
 	${LINK.c} -o ${.TARGET} ${PROGOBJS} ${LDLIBS}
 
+abi.c:	abispec makeabi
+	./makeabi abispec
+
+abi.lh:	abispec makeabi
+	./makeabi abispec
+
 install: lsi
 	${INSTALL} -d ${PREFIX}/bin
 	${INSTALL} -c lsi ${PREFIX}/bin/lsi
@@ -28,4 +37,4 @@ depend:
 	mkdep -- ${CFLAGS} ${CPPFLAGS} ${SRCS}
 
 clean:
-	rm -f ${OBJS} lsi
+	rm -f ${OBJS} lsi abi.c abi.lh
diff --git a/src/lsi/abi.h b/src/lsi/abi.h
new file mode 100644
index 0000000..b3759f4
--- /dev/null
+++ b/src/lsi/abi.h
@@ -0,0 +1,40 @@
+/* abi.h */
+
+typedef int (*vm_intfn)(void);
+
+/*
+ * We must include here all prototypes for functions which can be
+ * included in the ABI function table
+ */
+
+int vm_intfn_nop(void);
+int vm_intfn_global_store(void);
+int vm_intfn_global_load(void);
+int vm_intfn_global_array_store(void);
+int vm_intfn_global_array_load(void);
+int vm_intfn_printint(void);
+int vm_intfn_printreal(void);
+int vm_intfn_printstr(void);
+int vm_intfn_dmxsetchannel(void);
+int vm_intfn_dmxoutput(void);
+int vm_intfn_gettime(void);
+int vm_intfn_waittime(void);
+int vm_intfn_wait(void);
+int vm_intfn_wakeup(void);
+int vm_intfn_spawn(void);
+int vm_intfn_midi_read(void);
+int vm_intfn_beatdetect_read(void);
+int vm_intfn_beatdetect_phase(void);
+int vm_intfn_beatdetect_confidence(void);
+int vm_intfn_realtoint(void);
+int vm_intfn_inttoreal(void);
+int vm_intfn_map3d_setcal(void);
+int vm_intfn_map3d_calibrate(void);
+int vm_intfn_map3d_transform(void);
+int vm_intfn_map3d_setparams(void);
+int vm_intfn_map3d_load(void);
+int vm_intfn_map3d_save(void);
+int vm_intfn_sin(void);
+int vm_intfn_cos(void);
+int vm_intfn_random(void);
+int vm_intfn_mouse_read(void);
diff --git a/src/lsi/abispec b/src/lsi/abispec
new file mode 100644
index 0000000..0d35714
--- /dev/null
+++ b/src/lsi/abispec
@@ -0,0 +1,39 @@
+/* This should be a master file specifying all aspects of ABI */
+
+/* Function assignments */
+
+function nop
+function global_store
+function global_load
+function global_array_store
+function global_array_load
+function printint
+function printreal
+function printstr
+function dmxsetchannel
+function dmxoutput
+function gettime
+function waittime
+function wait
+function wakeup
+function spawn
+function midi_read
+function beatdetect_read
+function beatdetect_phase
+function beatdetect_confidence
+funciton realtoint
+function inttoreal
+function map3d_setcal
+function map3d_calibrate
+function map3d_transform
+function map3d_setparams
+function map3d_load
+function map3d_save
+function sin
+function cos
+function random
+function mouse_read
+
+/*
+ * The ABI should be identified by a SHA1 hash of this file
+ */
diff --git a/src/lsi/makeabi b/src/lsi/makeabi
new file mode 100755
index 0000000..78322bd
--- /dev/null
+++ b/src/lsi/makeabi
@@ -0,0 +1,50 @@
+#!/bin/sh
+
+INFILE=$1
+
+if [ "X${INFILE}" = "X" ]
+then
+	echo "Usage: $0 abispec"
+	exit 1
+fi
+
+ABI=abi.c
+HEADER=abi.lh
+
+FNCOUNT=0
+
+do_function()
+{
+	echo "	vm_intfn_${ARG1}," >>${ABI}
+	echo "fndefint ${ARG1} ${FNCOUNT};" >>${HEADER}
+	FNCOUNT=$((${FNCOUNT}+1))
+}
+
+cat <<EOF >${ABI}
+/* abi.c */
+/* autogenerated - do not edit */
+
+#include "abi.h"
+
+vm_intfn vm_intfn_table[] = {
+EOF
+
+cat <<EOF >${HEADER}
+/* abi.lh */
+/* autogenerated - do not edit */
+
+EOF
+
+while read TYPE ARG1 ARG2
+do
+	case "$TYPE" in
+		function) do_function
+			;;
+	esac
+done <${INFILE}
+
+cat <<EOF >>${ABI}
+};
+
+const int vm_intfn_size = sizeof(vm_intfn_table) / sizeof(vm_intfn);
+EOF
diff --git a/src/lsi/vm.c b/src/lsi/vm.c
index 5651695..1762158 100644
--- a/src/lsi/vm.c
+++ b/src/lsi/vm.c
@@ -67,78 +67,14 @@ struct hashentry *arrayhash[HASHSIZE];
 
 #define GLOB_MAXNAMELEN	1024
 
-int vm_intfn_nop(void);
-int vm_intfn_global_store(void);
-int vm_intfn_global_load(void);
-int vm_intfn_global_array_store(void);
-int vm_intfn_global_array_load(void);
-int vm_intfn_printint(void);
-int vm_intfn_printreal(void);
-int vm_intfn_printstr(void);
-int vm_intfn_dmxsetchannel(void);
-int vm_intfn_dmxoutput(void);
-int vm_intfn_gettime(void);
-int vm_intfn_waittime(void);
-int vm_intfn_wait(void);
-int vm_intfn_wakeup(void);
-int vm_intfn_spawn(void);
-int vm_intfn_midi_read(void);
-int vm_intfn_beatdetect_read(void);
-int vm_intfn_beatdetect_phase(void);
-int vm_intfn_beatdetect_confidence(void);
-int vm_intfn_realtoint(void);
-int vm_intfn_inttoreal(void);
-int vm_intfn_map3d_setcal(void);
-int vm_intfn_map3d_calibrate(void);
-int vm_intfn_map3d_transform(void);
-int vm_intfn_map3d_setparams(void);
-int vm_intfn_map3d_load(void);
-int vm_intfn_map3d_save(void);
-int vm_intfn_sin(void);
-int vm_intfn_cos(void);
-int vm_intfn_random(void);
-int vm_intfn_mouse_read(void);
 void vm_destroy(struct vm_thread *);
 void vm_unqueue(struct vm_thread *);
 void vm_queue(struct vm_thread *, int);
 
-typedef int (*vm_intfn)(void);
-
-vm_intfn vm_intfn_table[] = {
-	vm_intfn_nop,
-	vm_intfn_global_store,
-	vm_intfn_global_load,
-	vm_intfn_global_array_store,
-	vm_intfn_global_array_load,
-	vm_intfn_printint,
-	vm_intfn_printreal,
-	vm_intfn_printstr,
-	vm_intfn_dmxsetchannel,
-	vm_intfn_dmxoutput,
-	vm_intfn_gettime,
-	vm_intfn_waittime,
-	vm_intfn_wait,
-	vm_intfn_wakeup,
-	vm_intfn_spawn,
-	vm_intfn_midi_read,
-	vm_intfn_beatdetect_read,
-	vm_intfn_beatdetect_phase,
-	vm_intfn_beatdetect_confidence,
-	vm_intfn_realtoint,
-	vm_intfn_inttoreal,
-	vm_intfn_map3d_setcal,
-	vm_intfn_map3d_calibrate,
-	vm_intfn_map3d_transform,
-	vm_intfn_map3d_setparams,
-	vm_intfn_map3d_load,
-	vm_intfn_map3d_save,
-	vm_intfn_sin,
-	vm_intfn_cos,
-	vm_intfn_random,
-	vm_intfn_mouse_read,
-};
+#include "abi.h"
 
-const int vm_intfn_size = sizeof(vm_intfn_table) / sizeof(vm_intfn);
+extern vm_intfn vm_intfn_table[];
+extern const int vm_intfn_size;
 
 void stack_push(struct vm_thread *thread, stkentry e);
 void stack_pop(struct vm_thread *thread, int count);