diff --git a/WHATSNEW.TXT b/WHATSNEW.TXT
index 5f16e52..bb105a9 100644
--- a/WHATSNEW.TXT
+++ b/WHATSNEW.TXT
@@ -55,7 +55,7 @@ New features in BBC BASIC (Z80) version 5.00, June 2024:
 4.5  Compound assignment (+=, -=, *=, /= etc.)
 4.6  Assigning to a sub-string: LEFT$()=, MID$()= , RIGHT$()=
 4.7  Hooks for CIRCLE,ELLIPSE,FILL,LINE,MOUSE,ORIGIN,RECTANGLE,SYS,TINT,WAIT
-4.8  Hooks for MODE function, TINT function, WIDTH function
+4.8  Hooks for ON, OFF, MODE function, TINT function, WIDTH function
 
 5. Extensions to Acorn's BASIC V, compatible with BB4W, BBCSDL and BBCTTY
 
diff --git a/bin/acorn/BBCBASIC.COM b/bin/acorn/BBCBASIC.COM
index 7377438..dc5cbff 100644
Binary files a/bin/acorn/BBCBASIC.COM and b/bin/acorn/BBCBASIC.COM differ
diff --git a/bin/acorn/MAKE.SUB b/bin/acorn/MAKE.SUB
index 37b3633..3a6466e 100644
--- a/bin/acorn/MAKE.SUB
+++ b/bin/acorn/MAKE.SUB
@@ -7,7 +7,7 @@ z80asm amos/rmf
 z80asm acorn/rmf
 z80asm data/rmf
 era bbctube.com
-link bbctube=/p:0100,main,exec,eval,asmb,math,acorn,amos,/p:4B00,data
+link bbctube=/p:0100,main,exec,eval,asmb,math,acorn,amos,/p:4C00,data
 hexbin bbctube
 era bbctube.hex
 ren bbctube.com=bbctube.bin
diff --git a/bin/cpm/BBCBASIC.COM b/bin/cpm/BBCBASIC.COM
index bea3442..cdc046f 100644
Binary files a/bin/cpm/BBCBASIC.COM and b/bin/cpm/BBCBASIC.COM differ
diff --git a/src/ACORN.Z80 b/src/ACORN.Z80
index f05414d..84261eb 100644
--- a/src/ACORN.Z80
+++ b/src/ACORN.Z80
@@ -3,7 +3,7 @@
 ;PATCH FOR BBC BASIC TO CP/M 2.2 & 3.0
 ;* ACORN COMPUTERS Z80 TUBE VERSION  *
 ;(C) COPYRIGHT R.T.RUSSELL, 02-01-1984
-;VERSION 5.0, 18-06-2024
+;VERSION 5.0, 12-07-2024
 ;
 OSWRCH	EQU	0FFEEH
 OSWORD	EQU	0FFF1H
@@ -61,6 +61,8 @@ TFILL	EQU	03H
 	GLOBAL	TINT
 	GLOBAL	WAIT
 	GLOBAL	SYS
+	GLOBAL	CSRON
+	GLOBAL	CSROFF
 ;
 	GLOBAL	PUTIMS
 	GLOBAL	GETIMS
@@ -385,6 +387,24 @@ GCOL0:	LD	H,L
 	CALL	WRCH3		;DLH
 XEQGO1:	JP	XEQ
 ;
+;CSRON  - Turn caret on
+;CSROFF - Turn caret off
+;
+CSRON:	LD	C,1
+	JR	CSRGO
+;
+CSROFF:	LD	C,0
+CSRGO:	LD	A,23
+	CALL	OSWRCH
+	LD	A,1
+	CALL	OSWRCH
+	LD	A,C
+	LD	B,8
+CSRGO1:	CALL	OSWRCH
+	XOR	A
+	DJNZ	CSRGO1
+	JR	XEQGO1
+;
 ;LINE x1,y1,x2,y2
 ;
 LINE:	CALL	EXPRI
diff --git a/src/EXEC.Z80 b/src/EXEC.Z80
index 75d532b..6264ef1 100644
--- a/src/EXEC.Z80
+++ b/src/EXEC.Z80
@@ -10,7 +10,7 @@
 ;
 ;VERSION 2.1, 22-01-1984
 ;VERSION 3.1, 11-06-1987
-;VERSION 5.0, 16-06-2024
+;VERSION 5.0, 12-07-2024
 ;
 	GLOBAL	XEQ
 	GLOBAL	RUN0
@@ -58,6 +58,8 @@
 	EXTRN	BYE
 	EXTRN	NXT
 	EXTRN	NLIST
+	EXTRN	CSRON
+	EXTRN	CSROFF
 ;
 	EXTRN	OSWRCH
 	EXTRN	OSLINE
@@ -358,6 +360,16 @@ CLI:	CALL	EXPRS
 	CALL	OSCLI
 	JR	XEQ
 ;
+EXTRAS:	CP	TELSE-TCMD
+	JR	Z,REM		;ELSE
+	CP	TERROR-TCMD
+	JR	Z,THROW		;ERROR
+	CP	TLINE-TCMD
+	JP	Z,LINE		;LINE
+	CP	TOFF-TCMD
+	JP	Z,CSROFF	;OFF
+	JP	SYNTAX
+;
 ;REM, *
 ;
 EXT:	PUSH	IY
@@ -372,14 +384,6 @@ REM:	PUSH	IY
 	POP	IY
 	JP	XEQ0
 ;
-EXTRAS:	CP	TELSE-TCMD
-	JR	Z,REM		;ELSE
-	CP	TERROR-TCMD
-	JR	Z,THROW		;ERROR
-	CP	TLINE-TCMD
-	JP	Z,LINE		;LINE
-	JP	SYNTAX
-;
 ;ERROR num,string$
 ;
 THROW:	CALL	EXPRI
@@ -833,7 +837,9 @@ XEQGO3:	JP	XEQ
 ;ON ERROR [LOCAL] statement [:statement...]
 ;ON ERROR [LOCAL] OFF
 ;
-ON:	CP	TERROR
+ON:	CALL	TERMQ
+	JP	Z,CSRON
+	CP	TERROR
 	JR	Z,ONERR		;"ON ERROR"
 	CALL	EXPRI
 	LD	A,(IY)
@@ -1791,7 +1797,7 @@ ENDWH1:	PUSH	IY
 CLS:	CALL	CLRSCN
 	XOR	A
 	LD	(COUNT),A
-	JP	XEQ
+	JR	XEQGO5
 ;
 ;STOP
 ;
@@ -1808,7 +1814,7 @@ STOP:	CALL	TELL
 ;REPORT
 ;
 REPOR:	CALL	REPORT
-	JP	XEQ
+	JR	XEQGO5
 ;
 ;CLEAR
 ;
@@ -1821,7 +1827,7 @@ CLR:	CALL	CLEAR
 RESERR:	INC	IY
 	LD	A,2
 	CALL	RESLOC
-	JP	NZ,XEQ
+	JR	NZ,XEQGO5
 	LD	A,53		;ON ERROR not LOCAL
 ERROR5:	JP	ERROR
 ;
@@ -1830,7 +1836,7 @@ ERROR5:	JP	ERROR
 RESDAT:	INC	IY
 	LD	A,1
 	CALL	RESLOC
-	JP	NZ,XEQ
+	JR	NZ,XEQGO5
 	LD	A,54		;'DATA not LOCAL'
 	DEFB	21H
 NOLINE:	LD	A,41		;'No such line'
diff --git a/src/HOOK.Z80 b/src/HOOK.Z80
index 6b6df34..19549dc 100644
--- a/src/HOOK.Z80
+++ b/src/HOOK.Z80
@@ -19,6 +19,8 @@
 	GLOBAL	TINT
 	GLOBAL	WAIT
 	GLOBAL	SYS
+	GLOBAL	CSRON
+	GLOBAL	CSROFF
 ;
 	GLOBAL	ADVAL
 	GLOBAL	POINT
@@ -55,6 +57,8 @@ MODEFN:
 WIDFN:
 WAIT:
 SYS:
+CSRON:
+CSROFF:
 	XOR	A
 	CALL	EXTERR
 	DEFM	'Sorry'