diff --git a/electric_duet/Makefile b/electric_duet/Makefile
index 49caa993..89326b3c 100644
--- a/electric_duet/Makefile
+++ b/electric_duet/Makefile
@@ -8,14 +8,14 @@ $(DOS33):
 	cd ../dos33fs-utils && make
 
 eduet.dsk:	$(DOS33) ED HIGHWIND.ED FIGHTING.ED SA.ED KERBAL.ED
-	$(DOS33) -y eduet.dsk BSAVE -a 0x900 ED
+	$(DOS33) -y eduet.dsk BSAVE -a 0x0C00 ED
 	$(DOS33) -y eduet.dsk BSAVE -a 0x2000 HIGHWIND.ED
 	$(DOS33) -y eduet.dsk BSAVE -a 0x2000 FIGHTING.ED
 	$(DOS33) -y eduet.dsk BSAVE -a 0x2000 SA.ED
 	$(DOS33) -y eduet.dsk BSAVE -a 0x2000 KERBAL.ED
 
 ED:	duet.o
-	ld65 -o ED duet.o -C ../linker_scripts/apple2_900.inc
+	ld65 -o ED duet.o -C ../linker_scripts/apple2_c00.inc
 
 duet.o:	duet.s
 	ca65 -o duet.o duet.s -l duet.lst
diff --git a/electric_duet/duet.s b/electric_duet/duet.s
index d4dac092..09999a95 100644
--- a/electric_duet/duet.s
+++ b/electric_duet/duet.s
@@ -33,6 +33,8 @@ MADDRH	EQU	$1F
 LOC4E	EQU	$4E
 LOC4F	EQU	$4F
 
+STARTADDR	EQU	$0900
+
 play_ed:
 	LDA	#$01		; 900: A9 01	; 2 *!*
 	STA	LOC9		; 902: 85 09	; 3
@@ -77,23 +79,23 @@ label4:
 play_note:
 	STA	DURATION	; 937: 85 08	; 3
 	JSR	sub1		; 939: 20 2D09	; 6
-	STX	$0983		; 93C: 8E 8309	; 4	self-modify EOR/CMP
+	STX	STARTADDR+$83	; 93C: 8E 8309	; 4	self-modify EOR/CMP
 	STA	LOC6		; 93F: 85 06	; 3
 	LDX	LOC9		; 941: A6 09	; 3 *!*
 label5:
 	LSR	A		; 943: 4A	; 2
 	DEX			; 944: CA	; 2
 	BNE	label5		; 945: D0 FC	; 4 *!*
-	STA	$097C		; 947: 8D 7C09	; 4		; self-modify
+	STA	STARTADDR+$7C	; 947: 8D 7C09	; 4		; self-modify
 	JSR	sub1		; 94A: 20 2D09	; 6
-	STX	$09BB		; 94D: 8E BB09	; 4		; self-modify
+	STX	STARTADDR+$BB	; 94D: 8E BB09	; 4		; self-modify
 	STA	LOC7		; 950: 85 07	; 3
 	LDX	LOC1D		; 952: A6 1D	; 3 *!*
 label6:
 	LSR	A		; 954: 4A	; 2
 	DEX			; 955: CA	; 2
 	BNE	label6		; 956: D0 FC	; 4 *!*
-	STA	$09B4		; 958: 8D B409	; 4		; self-modify
+	STA	STARTADDR+$B4	; 958: 8D B409	; 4		; self-modify
 	PLA			; 95B: 68	; 4
 	TAY			; 95C: A8	; 2
 	PLA			; 95D: 68	; 4
@@ -111,7 +113,7 @@ label7:
 	BIT	$C030		; 96C: 2C 30C0	; 4		SPEAKER
 label9:
 	STA	LOC4E		; 96F: 85 4E	; 3
-	BIT	$C000		; 971: 2C 00C0	; 4
+	BIT	$C000		; 971: 2C 00C0	; 4		KEYBOARD DATA
 	BMI	label4		; 974: 30 C0	; 4 *!*
 	DEY			; 976: 88	; 2
 	BNE	label10		; 977: D0 02	; 4 *!*
diff --git a/electric_duet/eduet.dsk b/electric_duet/eduet.dsk
index b6037670..af57daf7 100644
Binary files a/electric_duet/eduet.dsk and b/electric_duet/eduet.dsk differ
diff --git a/electric_duet/hello.bas b/electric_duet/hello.bas
new file mode 100644
index 00000000..3ff95f60
--- /dev/null
+++ b/electric_duet/hello.bas
@@ -0,0 +1,23 @@
+   2  HOME 
+   5  PRINT 
+  10  PRINT "ELECTRIC DUET DEMOS"
+  20  PRINT 
+  30  PRINT "1. STILL ALIVE"
+  35  PRINT "2. FF7 FIGHTING"
+  40  PRINT "3. FF7 HIGHWIND"
+  45  PRINT "4. KERBAL THEME"
+ 100  PRINT  CHR$ (4)"BLOAD ED"
+ 120  PRINT "-----> ";: INPUT A
+ 130  IF A < 0 OR A > 4 THEN  GOTO 120
+ 140  ON A GOTO 200,210,220,230
+ 200  PRINT  CHR$ (4)"BLOAD SA.ED,A$2000"
+ 205  GOTO 1000
+ 210  PRINT  CHR$ (4)"BLOAD FIGHTING.ED,A$2000"
+ 215  GOTO 1000
+ 220  PRINT  CHR$ (4)"BLOAD HIGHWIND.ED,A$2000"
+ 225  GOTO 1000
+ 230  PRINT  CHR$ (4)"BLOAD KERBAL.ED,A$2000"
+ 235  GOTO 1000
+1000  POKE 30,0: POKE 31,32
+1010 CALL 256*12
+1020 GOTO 2