pushgprs:
    push AX
    push BX
    push CX
    push DX
    ret
popgprs:
    pop DX
    pop CX
    pop BX
    pop AX
    ret

cursor_moveleft:
    call pushgprs
    call cursor_getpos
    inc DL
    call cursor_setpos
    call popgprs
    ret