v5beta5: Fixed DIM var LOCAL size

src/EXEC.Z80

@@ -10,7 +10,7 @@
 ;
 ;VERSION 2.1, 22-01-1984
 ;VERSION 3.1, 11-06-1987
-;VERSION 5.0, 19-05-2024
+;VERSION 5.0, 10-06-2024
 ;
 	GLOBAL	XEQ
 	GLOBAL	RUN0
@@ -430,7 +430,7 @@ SWAP1:	LD	C,(HL)
 	INC	DE
 	INC	HL
 	DJNZ	SWAP1
-	JR	XEQR
+	JR	XEQGO4
 ;
 ;[LET] var = expr
 ;
@@ -453,7 +453,7 @@ LET:	CALL	ASSIGN
 	POP	IX
 	POP	HL
 	CALL	MODIFS
-XEQR:	JP	XEQ
+XEQGO4:	JP	XEQ
 ;
 ; GETSTR - Get string variable
 ;   Inputs: IY = text pointer
@@ -498,7 +498,7 @@ ASM:	LD	(CURLIN),IY
 	AND	0FH
 	OR	30H
 	LD	(HL),A
-	JR	XEQR
+	JR	XEQGO4
 ;
 ;=
 ;
@@ -625,9 +625,11 @@ DIM3:	PUSH	HL
 	BIT	0,A
 	JR	Z,ARRCHK	;NOT LOCAL
 	LD	HL,0
-	ADD	HL,SP
 	SBC	HL,DE
+	OR	A
 	SBC	HL,BC
+	ADD	HL,SP
+	JR	Z,ARRCHK	;RESERVE NOTHING
 	LD	SP,HL
 	PUSH	DE
 	PUSH	BC
@@ -889,8 +891,10 @@ ON4:	LD	A,(IY)
 	JP	Z,IF1		;ELSE CLAUSE
 	CP	CR
 	JR	NZ,ON4
-	LD	A,40
-ERROR2:	JP	ERROR		;"ON range"
+	LD	A,40		;'ON range'
+	DEFB	21H
+FORVAR:	LD	A,34		;'FOR variable'
+ERROR2:	JP	ERROR
 ;
 ONPROC:	LD	A,TON
 	JP	PROC
@@ -961,9 +965,6 @@ XEQGO2:	JP	XEQ
 ;
 ;FOR var = expr TO expr [STEP expr]
 ;
-FORVAR:	LD	A,34
-	JR	ERROR2		;"FOR variable"
-;
 FOR:	CALL	ASSIGN
 	JR	NZ,FORVAR	;"FOR variable"
 	PUSH	AF		;SAVE TYPE
@@ -1367,7 +1368,7 @@ ENDPRO:	POP	BC
 	JP	ERROR		;"No PROC"
 ;
 ENDPR1:	POP	IY
-	JP	XEQ
+XEQGO6:	JP	XEQ
 ;
 ;INPUT #channel,var,var...
 ;
@@ -1428,7 +1429,7 @@ INPUT:	CP	'#'
 INPUT0:	LD	HL,BUFFER
 	LD	(HL),CR		;INITIALISE EMPTY
 INPUT1:	CALL	TERMQ
-	JP	Z,XEQ		;DONE
+	JR	Z,XEQGO6	;DONE
 	INC	IY
 	CP	','
 	JR	Z,INPUT3	;SKIP COMMA
@@ -1556,14 +1557,14 @@ IF:	CALL	EXPRI
 	JR	Z,IFNOT		;FALSE
 	LD	A,(IY)
 	CP	TTHEN
-	JP	NZ,XEQ
+	JR	NZ,XEQGO7
 IF0:	INC	IY		;SKIP "THEN"
 	LD	A,(IY)
 	CP	';'
 	JR	Z,IF0
 IF1:	CALL	NXT
 	CP	TLINO
-	JP	NZ,XEQ		;STATEMENT FOLLOWS
+	JR	NZ,XEQGO7	;STATEMENT FOLLOWS
 	JP	GOTO		;LINE NO. FOLLOWS
 ;
 IFELSE:	LD	A,(IY)
@@ -1603,8 +1604,8 @@ MELSE:	LD	BC,-3
 	LD	BC,TENDIF
 	LD	DE,TENDIF*256+TTHEN
 	CALL	NSCAN
-	JP	Z,XEQ
-	JR	NENDIF
+	JR	NZ,NENDIF
+XEQGO7:	JP	XEQ
 ;
 ; WHEN and OTHERWISE:
 ;
@@ -1613,7 +1614,7 @@ WHEN:	LD	BC,-3
 	LD	BC,TENDCASE
 	LD	DE,TENDCASE*256+TOF
 	CALL	NSCAN
-	JP	Z,XEQ
+	JR	Z,XEQGO7
 	LD	A,47
 	JR	ERROR4		;"Missing ENDCASE"
 ;
@@ -1707,12 +1708,12 @@ CASE2:	LD	A,(IY)
 ;Finished, level stack if string:
 ;
 CASE9:	BIT	0,B
-	JR	Z,CASE8
+	JR	Z,XEQGO5
 	LD	H,0
 	LD	L,C
 	ADD	HL,SP
 	LD	SP,HL
-CASE8:	JP	XEQ
+	JR	XEQGO5
 ;
 ;Matched, so skip any more expressions:
 ;
@@ -2727,6 +2728,7 @@ RESARR:	POP	BC
 	ADD	HL,SP
 	CALL	NZ,FREESA	;Free string array
 RESAR1:	LD	SP,HL
+	INC	IX		;Flag something restored
 	JR	RESLO1
 ;
 ; RESLOC - Restore local variables/arrays or DATA/ERROR status from stack

src/MAIN.Z80

@@ -174,7 +174,7 @@ PURGE:	LD	(HL),A		;CLEAR SCRATCHPAD
 	CALL	NEWIT
 	JP	NZ,CHAIN0	;AUTO-RUN
 	CALL	TELL
-VERMSG:	DEFM	'BBC BASIC (Z80) Version 5beta4'
+VERMSG:	DEFM	'BBC BASIC (Z80) Version 5beta5'
 	DEFB	CR
 	DEFB	LF
 NOTICE:	DEFM	'(C) Copyright R.T.Russell 2024'