diff --git a/pics/screenshot_addr.png b/pics/screenshot_addr.png
index cd8a5ef..74c998a 100644
Binary files a/pics/screenshot_addr.png and b/pics/screenshot_addr.png differ
diff --git a/pics/screenshot_desr.png b/pics/screenshot_desr.png
index 1f715d4..5e96e38 100644
Binary files a/pics/screenshot_desr.png and b/pics/screenshot_desr.png differ
diff --git a/softswitch.bas b/softswitch.bas
index 3a7a7ee..fcbeef1 100644
--- a/softswitch.bas
+++ b/softswitch.bas
@@ -1,8 +1,8 @@
-0 TEXT:PRINT CHR$(21):HOME:GOTO 80:REM VER MP.3
-1 IF S8 AND P2 THEN U=AUX:V=SPC:W=SPC
-2 VTAB Y:HTAB  7:? B$(U);:HTAB 18:? B$(V);:HTAB 29:? B$(W);:RETURN:REM COLS RW/R/W
-3 Z=2*RR + RW:V=SPC:W=SPC:REM AUX MEM
-4 IF Z=0 THEN U=RAM:V=SPC:W=SPC
+0 TEXT:PRINT CHR$(21):HOME:PRINT "v4":GOTO 80
+1 IF S8 AND P2=0 THEN U=RAM:V=SPC:W=SPC
+2 IF S8 AND P2=1 THEN U=AUX:V=SPC:W=SPC
+3 VTAB Y:HTAB  7:? B$(U);:HTAB 18:? B$(V);:HTAB 29:? B$(W);:RETURN:REM COLS RW/R/W
+4 Z=2*RR + RW:V=SPC:W=SPC:IF Z=0 THEN U=RAM:V=SPC:W=SPC:REM AUX MEM
 5 IF Z=1 THEN U=SPC:V=RAM:W=AUX
 6 IF Z=2 THEN U=SPC:V=AUX:W=RAM
 7 IF Z=3 THEN U=AUX:V=SPC:W=SPC
@@ -52,7 +52,7 @@
 420 IF X=1 THEN U=ROM:V=SPC:W=SPC
 430 IF X=2 THEN U=RLC:V=SPC:W=SPC
 440 IF X=3 THEN U=SPC:V=RLC:W=ROM
-450 GOSUB  2
+450 GOSUB 3
 500 Y=4:REM *** $D000
 510 IF Z=0 THEN U=SPC:V=ROM:W=RV2
 520 IF Z=1 THEN U=SPC:V=ROM:W=RU1
@@ -62,17 +62,17 @@
 560 IF Z=5 THEN U=RU1:V=SPC:W=SPC
 570 IF Z=6 THEN U=SPC:V=RV2:W=ROM
 580 IF Z=7 THEN U=SPC:V=RU1:W=ROM
-590 GOSUB 2
+590 GOSUB 3
 600 REM *** LOWER 48K
-610 Y= 7:U=RAM:GOSUB 3:GOSUB 2:REM $BFFF
-620 Y= 9:U=RAM:GOSUB 3:GOSUB 2:REM $4000
-630 Y=11:U=RAM:GOSUB 3:GOSUB 1:REM $2000
-640 Y=13:U=RAM:GOSUB 3:GOSUB 2:REM $0C00
-650 Y=15:U=RAM:GOSUB 3:GOSUB 2:REM $0800
-660 Y=17:U=RAM:GOSUB 3:GOSUB 1:REM $0400
-670 Y=19:U=RAM:GOSUB 3:GOSUB 2:REM $0200
+610 Y= 7:U=RAM:GOSUB 4:GOSUB 3:REM $BFFF
+620 Y= 9:U=RAM:GOSUB 4:GOSUB 3:REM $4000
+630 Y=11:U=RAM:GOSUB 4:GOSUB 1:REM $2000
+640 Y=13:U=RAM:GOSUB 4:GOSUB 3:REM $0C00
+650 Y=15:U=RAM:GOSUB 4:GOSUB 3:REM $0800
+660 Y=17:U=RAM:GOSUB 4:GOSUB 1:REM $0400
+670 Y=19:U=RAM:GOSUB 4:GOSUB 3:REM $0200
 680 Y=21:U=RAM:IF AZ THEN U=AUX:REM $0000
-690 V=SPC:W=SPC:GOSUB 2:VTAB 1
+690 V=SPC:W=SPC:GOSUB 3:VTAB 1
 700 K=PEEK(49152):IF K<128 THEN 700
 710 K=K-128:POKE 49168,0:IF K = 27 THEN VTAB 1:END
 720 CMD=0:FOR I=1 TO D:IF K = K(I) THEN CMD=I:I=D:GOTO 740
@@ -110,19 +110,19 @@
 1060 DATA "$D000",1
 1070 DATA "     ",3
 1080 DATA "$BFFF",0
-1090 DATA "     ",1
-1100 DATA "$5FFF",0
+1090 DATA "$6000",1
+1100 DATA "     ",0
 1110 DATA "$4000",1
-1120 DATA "$3FFF",0
+1120 DATA "     ",0
 1130 DATA "$2000",1
 1140 DATA "     ",0
 1150 DATA "$0C00",1
-1160 DATA "$0BFF",0
+1160 DATA "     ",0
 1170 DATA "$0800",1
-1180 DATA "$07FF",0
+1180 DATA "     ",0
 1190 DATA "$0400",1
 1200 DATA "     ",0
 1210 DATA "$0200",1
-1220 DATA "$01FF",0
+1220 DATA "     ",0
 1230 DATA "$0000",1
 
diff --git a/softswitch.po b/softswitch.po
index 85939a2..880b583 100644
Binary files a/softswitch.po and b/softswitch.po differ