Don't use character classification functions in OS rtl

This is to force the character classification functions to use the static,
modified maptab that represents CP437 rather than ASCII. No functions
currently operate with ASCII, while the graphx library operates with
CP437. If this changes in the future, we should implement the LC_CTYPE
category of locaale.h.

Author: runer112

CEdev/lib/src/std/os_functions_linked/isalnum.asm

@@ -1,28 +1,28 @@
-	.def	_isalnum
-	.ref	___maptab
-	.assume adl=1
-	
-; original source
-; int isalnum(int c) {
-; 	if( (unsigned char)c & (unsigned char)0x80 )
-;		return (0);
-;	return(__maptab[c] & (unsigned char)(UC|LC|DIG));
-; }
-
-_isalnum:
-	pop	hl
-	pop	de
-	push	de
-	push	hl
-	or	a,a
-	sbc	hl,hl
-	bit	7,e
-	ret	nz
-	ex	de,hl
-	ld	de,___maptab
-	add	hl,de
-	ld	a,(hl)
-	and	a,13
-	sbc	hl,hl
-	ld	l,a
-	ret
+	.def	_isalnum
+	.ref	___maptab
+	.assume adl=1
+	
+; original source
+; int isalnum(int c) {
+; 	if( (unsigned char)c & (unsigned char)0x80 )
+;		return (0);
+;	return(__maptab[c] & (unsigned char)(UC|LC|DIG));
+; }
+
+_isalnum:
+	pop	hl
+	pop	de
+	push	de
+	push	hl
+	or	a,a
+	sbc	hl,hl
+	bit	7,e
+	ret	nz
+	ex	de,hl
+	ld	de,___maptab
+	add	hl,de
+	ld	a,(hl)
+	and	a,13
+	sbc	hl,hl
+	ld	l,a
+	ret

CEdev/lib/src/std/os_functions_linked/isalpha.asm

@@ -1,27 +1,27 @@
-	.def	_isalpha
-	.ref	___maptab
-	.assume adl=1
-	
-; original source
-; int isalnum(int c) {
-; 	if( (unsigned char)c & (unsigned char)0x80 )
-;		return (0);
-;	return(__maptab[c] & (unsigned char)(UC|LC));
-
-_isalpha:
-	pop	hl
-	pop	de
-	push	de
-	push	hl
-	or	a,a
-	sbc	hl,hl
-	bit	7,e
-	ret	nz
-	ex	de,hl
-	ld	de,___maptab
-	add	hl,de
-	ld	a,(hl)
-	and	a,12
-	sbc	hl,hl
-	ld	l,a
-	ret
+	.def	_isalpha
+	.ref	___maptab
+	.assume adl=1
+	
+; original source
+; int isalnum(int c) {
+; 	if( (unsigned char)c & (unsigned char)0x80 )
+;		return (0);
+;	return(__maptab[c] & (unsigned char)(UC|LC));
+
+_isalpha:
+	pop	hl
+	pop	de
+	push	de
+	push	hl
+	or	a,a
+	sbc	hl,hl
+	bit	7,e
+	ret	nz
+	ex	de,hl
+	ld	de,___maptab
+	add	hl,de
+	ld	a,(hl)
+	and	a,12
+	sbc	hl,hl
+	ld	l,a
+	ret

CEdev/lib/src/std/os_functions_linked/iscntrl.asm

@@ -1,27 +1,27 @@
-	.def	_iscntrl
-	.ref	___maptab
-	.assume adl=1
-
-;int iscntrl(int c) {
-;	if( (unsigned char)c & (unsigned char)0x80 )
-;		return (0);
-;	return(__maptab[c] & (unsigned char)(CTL));
-;}
-
-_iscntrl:
-	pop	hl
-	pop	de
-	push	de
-	push	hl
-	or	a,a
-	sbc	hl,hl
-	bit	7,e
-	ret	nz
-	ex	de,hl
-	ld	de,___maptab
-	add	hl,de
-	ld	a,(hl)
-	and	a,128
-	sbc	hl,hl
-	ld	l,a
-	ret
+	.def	_iscntrl
+	.ref	___maptab
+	.assume adl=1
+
+;int iscntrl(int c) {
+;	if( (unsigned char)c & (unsigned char)0x80 )
+;		return (0);
+;	return(__maptab[c] & (unsigned char)(CTL));
+;}
+
+_iscntrl:
+	pop	hl
+	pop	de
+	push	de
+	push	hl
+	or	a,a
+	sbc	hl,hl
+	bit	7,e
+	ret	nz
+	ex	de,hl
+	ld	de,___maptab
+	add	hl,de
+	ld	a,(hl)
+	and	a,128
+	sbc	hl,hl
+	ld	l,a
+	ret

CEdev/lib/src/std/os_functions_linked/isdigit.asm

@@ -1,27 +1,27 @@
-	.def	_isdigit
-	.ref	___maptab
-	.assume adl=1
-
-;int isdigit(int c) {
-;	if( (unsigned char)c & (unsigned char)0x80 )
-;		return (0);
-;	return(__maptab[c] & (unsigned char)(DIG));
-;}
-
-_isdigit:
-	pop	hl
-	pop	de
-	push	de
-	push	hl
-	or	a,a
-	sbc	hl,hl
-	bit	7,e
-	ret	nz
-	ex	de,hl
-	ld	de,___maptab
-	add	hl,de
-	ld	a,(hl)
-	and	a,1
-	sbc	hl,hl
-	ld	l,a
-	ret
+	.def	_isdigit
+	.ref	___maptab
+	.assume adl=1
+
+;int isdigit(int c) {
+;	if( (unsigned char)c & (unsigned char)0x80 )
+;		return (0);
+;	return(__maptab[c] & (unsigned char)(DIG));
+;}
+
+_isdigit:
+	pop	hl
+	pop	de
+	push	de
+	push	hl
+	or	a,a
+	sbc	hl,hl
+	bit	7,e
+	ret	nz
+	ex	de,hl
+	ld	de,___maptab
+	add	hl,de
+	ld	a,(hl)
+	and	a,1
+	sbc	hl,hl
+	ld	l,a
+	ret