diff --git a/HDISK/GTIADEMO.BAS b/HDISK/GTIADEMO.BAS
deleted file mode 100644
index 7f220c1..0000000
--- a/HDISK/GTIADEMO.BAS
+++ /dev/null
@@ -1,93 +0,0 @@
-10 REM gtia mode demo
-20 GRAPHICS 0
-30 POKE 752,1:POSITION 2,7
-40 ? "THIS IS A DEMONSTRATION OF MODES 9-11."
-50 ? "TO GO FROM ONE DISPLAY TO THE NEXT, "
-60 ? "PRESS THE [start] BUTTON AFTER EACH "
-70 ? "DISPLAY IS DONE."
-80 ? :? "TO SEE THE LUMINANCES AVAILABLE IN"
-90 ? "MODE 9, PRESS [start]. TO CHANGE"
-100 ? "THE HUE BASE, PRESS [start] AGAIN..."
-110 DEMO=0
-120 IF PEEK(53279)=6 THEN 140
-130 GOTO 120
-140 DEMO=DEMO+1
-150 ON DEMO GOSUB 1000,2000,3000,4000,5000,6000,7000,8000,9000,170
-160 GOTO 120
-170 END 
-999 REM 
-1000 REM ** MODE 9 LUMINANCES **
-1010 GRAPHICS 9
-1020 SETCOLOR 4,0,0
-1030 FOR H=0 TO 15
-1040 COLOR H
-1050 FOR P=0 TO 4
-1060 PLOT 5*H+P,0:DRAWTO 5*H+P,191
-1070 NEXT P:NEXT H
-1080 RETURN 
-1999 REM 
-2000 REM ** CHANGE MODE 9 COLOR BASE
-2010 FOR C=1 TO 15
-2020 SETCOLOR 4,C,0
-2030 FOR T=1 TO 300:NEXT T
-2040 NEXT C
-2050 RETURN 
-3000 GRAPHICS 0:POKE 752,1:POSITION 1,12
-3010 ? "THIS IS THE PIXEL SIZE FOR MODES 9-11:":FOR T=1 TO 100:NEXT T
-3020 RETURN 
-3999 REM 
-4000 REM ** GTIA PIXEL SIZE DEMO **
-4010 GRAPHICS 11:SETCOLOR 4,0,10
-4020 FOR J=1 TO 100
-4030 X=INT(80*(RND(0))):Y=INT(192*(RND(0))):C=INT(15*(RND(0)))+1
-4040 COLOR C:PLOT X,Y
-4050 NEXT J
-4060 RETURN 
-4070 NEXT X
-4080 NEXT Y
-4090 RETURN 
-4999 REM 
-5000 GRAPHICS 0:POKE 752,1:POSITION 2,11
-5010 ? "MODE 10 HAS THE SAME PIXEL SIZE, BUT"
-5020 ? "CAN SUPPORT UP TO 9 DIFFERENT COLORS"
-5030 ? "WITH INDEPENDENT HUES AND LUMINANCES:":FOR T=1 TO 100:NEXT T
-5040 RETURN 
-5999 REM 
-6000 REM ** MODE 10 COLOR DEMO **
-6010 GRAPHICS 10
-6020 POKE 704,0:POKE 705,30:POKE 706,120:POKE 707,160
-6030 SETCOLOR 0,4,4:SETCOLOR 1,3,12:SETCOLOR 2,14,2:SETCOLOR 3,5,12:SETCOLOR 4,1,2
-6040 FOR C=1 TO 8
-6050 COLOR C
-6060 FOR X=0 TO 4
-6070 PLOT 10*(C-1)+X,0:DRAWTO 10*(C-1)+X,191
-6080 NEXT X
-6090 NEXT C
-6100 RETURN 
-6198 REM 
-6199 REM ** MODE 11 COLOR DEMO **
-7000 GRAPHICS 0:POKE 752,1:POSITION 2,9
-7010 ? "MODE 11 HAS ONLY ONE LUMINANCE, BUT"
-7020 ? "CAN SUPPORT 16 DIFFERENT HUES."
-7030 ? :? "PRESS [start] TO SEE THE HUES"
-7040 ? "AVAILABLE, PRESS [start] AGAIN TO SEE"
-7050 ? "THE BASE LUMINANCE CHANGE...":FOR T=1 TO 100:NEXT T
-7060 RETURN 
-7999 REM 
-8000 REM ** MODE 11 HUES **
-8010 GRAPHICS 11
-8020 SETCOLOR 4,0,0
-8030 FOR H=0 TO 15
-8040 COLOR H
-8050 FOR P=0 TO 4
-8060 PLOT 5*H+P,0:DRAWTO 5*H+P,191
-8070 NEXT P:NEXT H
-8080 RETURN 
-8999 REM 
-9000 REM ** CHANGE MODE 11 LUMINANCE
-9010 FOR L=2 TO 14 STEP 2
-9020 SETCOLOR 4,0,L
-9030 FOR T=1 TO 200:NEXT T
-9040 NEXT L
-9050 RETURN 
-9999 REM ****************************