;-------------------------------------------------------- ; blink.asm - simple ASM example to toggle a port pin ; (LED on TINI board). ; ; On a TINI board this toggles really fast, so ; it appears that the LED just dims slightly. ; You may need a scope to detect it. ; ; You can use s51(ucsim simulator) to look at the ; blink.ihx(hex-file). Run like this: ; >S51 blink.ihx ; Then dump code like this: ; s51>dc ;-------------------------------------------------------- .module bootasm ;-------------------------------------------------------- ; Stack segment in internal ram ;-------------------------------------------------------- .area SSEG (DATA) __start__stack: .ds 1 .area CODE (CODE) ;-------------------------------------------------------- ; global & static initialisations ;-------------------------------------------------------- .area GSINIT (CODE) main: clr ea ; disable ints clr p3.5 ; turn LED off setb p3.5 ; turn LED on ljmp main