Ampro Corporation P5X manual Signal Name Full Name Description

Parallel port register bit definitions (Table 2– 23):

Table 2– 23. Standard and PS/2 Mode Register Bit Definitions

Signal
Name	Full Name	Description
TMOUT	Time-out	Valid only in EPP mode , this signal goes true
		after a 10 ∝ S time-out has occurred on the
		EPP bus. This bit is cleared by reset.
ERR*	Error	Reflects the status of the -ERROR input. 0
		means an error has occurred.
SLCT	Printer selected	Reflects the status of the SLCT input. 1 means
	status	a printer is on-line.
PE	Paper end	Reflects the status of the PE input. 1 indicates
		paper end.
ACK*	Acknowledge	Reflects the status of the ACK input. 0
		indicates a printer received a character..
BUSY*	Busy	Reflects the complement of the BUSY input. 0
		indicates a printer is busy.
STB*	Strobe	This bit is inverted and output to the -STROBE
		pin.
AUTOFD	Auto feed	This bit is inverted and output to the -AUTOFD
		pin.
INIT*	Initiate output	This bit is output to the -INIT pin.
SELIN*	Printer select	This bit is inverted and output to the pin. It
	input	selects a printer.
IRQE	Interrupt request	When set to 1, interrupts are enabled. An
	enable	interrupt is generated by the positive-going -
		ACK input.
PCD	Parallel control	When set to 1, port is in input mode. In printer
	direction	mode, the printer is always in output mode
		regardless of the state of this bit.
PD0-PD7	Parallel Data Bits

2–30