; SASM program to print out the alphabet .486 .model flat, stdcall .stack 1000h include sasmacros.inc title pralphabet program .data end_letter db 'z' one_ch db 'a' newline db 0ah .code main: put_ch one_ch compareb end_letter, one_ch bez stop_printing ; when one_ch becomes 'z', done printing iadd one_ch, 1 br main ; label main is the top of the loop stop_printing: put_ch newline done end