#include <msp430.h>

.extern line

.global __isr_8
__isr_8:
    push r15
    push r14
    
    bic #CCIFG, &TA0CCTL2

; WORD 0

    mov &line, r14
    mov #1, r15

.loop0:
    bit r14, r15

    jz .nobit0
    bis.b #0x01, &P2OUT
    jmp .end0
.nobit0:
    bic.b #0x01, &P2OUT
    nop
    nop
.end0:

    rla r15
    jnz .loop0

; WORD 1

    mov &line + 2, r14
    mov #1, r15

.loop1:
    bit r14, r15

    jz .nobit1
    bis.b #0x01, &P2OUT
    jmp .end1
.nobit1:
    bic.b #0x01, &P2OUT
    nop
    nop
.end1:

    rla r15
    jnz .loop1

; WORD 2

    mov &line + 4, r14
    mov #1, r15

.loop2:
    bit r14, r15

    jz .nobit2
    bis.b #0x01, &P2OUT
    jmp .end2
.nobit2:
    bic.b #0x01, &P2OUT
    nop
    nop
.end2:

    rla r15
    jnz .loop2

    ;jmp .out

; WORD 3

    mov &line + 6, r14
    mov #1, r15

.loop3:
    bit r14, r15

    jz .nobit3
    bis.b #0x01, &P2OUT
    jmp .end3
.nobit3:
    bic.b #0x01, &P2OUT
    nop
    nop
.end3:

    rla r15
    jnz .loop3

.out:
    bic.b #0x01, &P2OUT

    pop r14
    pop r15

    reti