INTERRUPT_ENABLE_REG
ENABLE_TMS9914_INTERRUPTS_BIT, a_priv->gpib_base + INTERRUPT_ENABLE_REG);
a_priv->gpib_base + INTERRUPT_ENABLE_REG);
ENABLE_TI_INTERRUPT_BIT, hp_priv->iobase[0] + INTERRUPT_ENABLE_REG);
outb(0, hp_priv->iobase[0] + INTERRUPT_ENABLE_REG);