diff --git a/BIN/NSCUTIL.S.txt b/BIN/NSCUTIL.S.txt
index 633a0e07..095f1662 100644
--- a/BIN/NSCUTIL.S.txt
+++ b/BIN/NSCUTIL.S.txt
@@ -46,31 +46,33 @@ CS.INIT			ldy #S.PS.hARGS
 				lda (pPs),y
 				bne CS.INIT.SET
 			
-CS.INIT.READ	jsr NSC.Select
+CS.INIT.READ	jsr NSC.Init
 				jsr NSC.Read
+				
 				ldx #7
-				lda DS1216E.DATA
-.1				and DS1216E.DATA,x				
+		
+.1				lda DS1216E.DETECT,x
+				eor DS1216E.DATA,x				
+				bne .8
 				dex
-				bne .1
-				cmp #$FF
-				bne .2
-					
+				bpl .1
+
 				>LDYA L.MSG.READ.KO
 				>SYSCALL SYS.PSTROutYA
 				
-				bra .8
-
-.2				jsr NSC.Dump
+				lda #DEVMGR.ERRNOHW
+				sec
+				rts
+				
+.8				jsr NSC.Dump
 
 				>LDYA L.MSG.USAGE
 				>SYSCALL SYS.PSTROutYA
-
-
-.8				lda #0					tell TSKMGR that all done ok, but 
+				
+				lda #0					tell TSKMGR that all done ok, but 
 				sec						we do not want to stay in memory
 				rts
-				
+
 CS.INIT.SET		>SYSCALL SYS.GetMemPtrA
 				>STYA ZPPtr1
 				
@@ -132,7 +134,6 @@ CS.INIT.SET		>SYSCALL SYS.GetMemPtrA
 				sta DS1216E.DATA+6
 				stz DS1216E.DATA+7
 				
-				jsr NSC.Select
 				jsr NSC.Write
 				
 				lda #0					tell TSKMGR that all done ok, but 
@@ -148,10 +149,31 @@ CS.DOEVENT
 CS.QUIT			clc
 				rts
 *--------------------------------------
-NSC.Select		php
+NSC.Init		php
 				sei
+				lda $CFFF
+				pha
+				
+				ldx #7
+				
+.1				ldy #8
+.2				lda $C304
+				
+				lsr
+				ror DS1216E.DETECT,x
+				
+				dey
+				bne .2
+				
+				dex
+				bpl .1
+				pla
+				bmi .99
 				sta $CFFF
-				sta $C00A
+.99				plp
+				rts
+*--------------------------------------
+NSC.Select		sta $C300
 
 				lda $C304				Reset DS1216E comparison register with READ A2=1
 				
@@ -165,18 +187,23 @@ NSC.Select		php
 				lsr
 				bcc .5
 				iny
-.5				sta $C300,y				Write Pattern bit in A0, with A2=0
+.5				pha
+				lda $C300,y				Write Pattern bit in A0, with A2=0
+				pla
 				dex
 				bne .4
 				
 				plx
 				dex
 				bpl .3
-				plp
 				rts
 *--------------------------------------
 NSC.Read		php
 				sei
+				lda $CFFF
+				pha
+				
+				jsr NSC.Select
 
 				ldx #7
 				
@@ -191,11 +218,18 @@ NSC.Read		php
 				
 				dex
 				bpl .1
-				plp
+				pla
+				bmi .99
+				sta $CFFF
+.99				plp
 				rts
 *--------------------------------------
 NSC.Write		php
 				sei
+				lda $CFFF
+				pha
+				
+				jsr NSC.Select
 
 				ldx #7
 				
@@ -207,18 +241,24 @@ NSC.Write		php
 				lsr
 				bcc .5
 				iny
-.5				sta $C300,y				Write Pattern bit in A0, with A2=0
+.5				pha
+				lda $C300,y				Write Pattern bit in A0, with A2=0
+				pla
 				dex
 				bne .4
 				
 				plx
 				dex
 				bpl .3
-				plp
+				pla
+				bmi .99
+				sta $CFFF
+.99				plp
 				rts
 *--------------------------------------
 NSC.Dump		ldx #1
 				ldy #1
+				
 				lda DS1216E.DATA+3
 				bit #%00010000
 				beq .1
@@ -328,7 +368,8 @@ MSG.READ.OK4	>PSTRING "\nTime:"
 MSG.USAGE		>PSTRING "\n\nTo Reset the chip and set clock, type:\nNSCUTIL DD/MM/YY hh:mm:ss\n"
 TmpByte			.BS 1
 DS1216E.PATTERN	.HS	5CA33AC55CA33AC5	Reverted 7->0
-DS1216E.DATA	.HS FFFFFFFFFFFFFFFF	Reverted YY MM DD Day HH mm SS CS
+DS1216E.DETECT	.BS 8
+DS1216E.DATA	.BS 8					Reverted YY MM DD Day HH mm SS CS
 *--------------------------------------
 DS.START
 DS.END