Programming Forums - Almost, but not quite there

Hi. I'm a newbie here :)

Anyways, I need help in this code in TASM or task assembler. The purpose is to make the LEDs (light emitting diodes) blink at an increasing manner. Here's the layout of the LEDs:

1 2 4 8 16 32 64 128
0 0 0 0 0 0 0 0

Basically, I already got the code for making all these LEDs blink at the same time for about 3 seconds, then off, then on, then off.

My problem is how to make them blink in an increasing manner: from LED 1, then LED 2, then LEDS 1 and 2, then LED 4, then LEDs 4 and 1 (the manner is that the LEDs light up from 1 to 255 so that by 254, all but LED 1 will light up and by 255, all LEDs light up) here's the code for all LEDs lighting up all at once, then off, then on again, then off:

H=hexa
B=binary

clrscr= main proc near

       mov ax,0600

       mov bx,0700

       mov cx,0000

       mov dx,184fH

       int 10







mov dx,0378H

mov al,11111111B

out dx,al

inc cx

cmp cx,0ffffH

jne a1

int 21H

mov cx,0







mov dx,0378H

mov al,00000000B

out dx,al

inc cx

cmp cx,0ffffH

jnc a2

int 21H

mov ex,0





mov dx,0378H

mov al,11111111B

out dx,al

inc cx

cmp ex,0ffffH

jnc a3

int21H

mov ex,0





mov dx,0378

mov al,00000000B

out dx,al

inc cx

cmp ex,0ffffH

jnc a4

int 21H

jmp clrscr







end program

mov ah,01

int 21H

mov ah,4cH

int 21H

main endp

end main

Could you guys help me crack the code for this one please? Thanks, God bless