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.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
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