HelenOS sources

ctl_strobe        220 uspace/drv/char/pc-lpt/pc-lpt.c 	pio_write_8(&lpt->regs->control, control | BIT_V(uint8_t, ctl_strobe));
ctl_strobe        222 uspace/drv/char/pc-lpt/pc-lpt.c 	pio_write_8(&lpt->regs->control, control & ~BIT_V(uint8_t, ctl_strobe));