/ / New I/O. / Isdigit. / .globl isdigi / / int isdigit(c); / int c; / Check if the character `c' is a digit. / Return 1 if it is; 0 otherwise. / isdigi: clr r0 mov 2(sp),r1 cmp r1,$'0 blo 0f cmp r1,$'9 bhi 0f inc r0 0: rts pc