MEMSTICK_SYS_PAM
msb->regs.param.system &= ~MEMSTICK_SYS_PAM;
msb->regs.param.system |= MEMSTICK_SYS_PAM;
bool was_parallel = msb->regs.param.system & MEMSTICK_SYS_PAM;
msb->regs.param.system &= ~MEMSTICK_SYS_PAM;