.org 0x100

MAIN_LOOP:
MOV DL,#0xF0
DELAY11:
MOV AX,#0x0000
DELAY1:
INC AX
JNZ DELAY1
INC DL
JNZ DELAY11

MOV AL,#0x01
out byte #0xB0

MOV DL,#0xF0
DELAY21:
MOV AX,#0x0000
DELAY2:
INC AX
JNZ DELAY2
INC DL
JNZ DELAY21
MOV AL,#0x00
out byte #0xB0

MOV AX,#0x0100
JMP AX

.ORG 0xFFF0
MOV AX,#0x0100
JMP AX