Ampro Corporation 486E manual Register Bit Definitions, Signal Name Full Name Description

Little Board™/486e Technical Manual

Note

For maximum reliability, keep the cable between the board and the device it drives to 10 feet or less in length.

Register Bit Definitions

Table 2–21 defines the register bits shown in the Signal Name or Function column of Table 2–19.

Table 2–21. Standard and PS/2 Mode Register Bit Definitions

Signal

Name

Full Name

Description

-ERR	Error	Reflects the status of the -ERROR input. 0 means
		an error has occurred.
SLCT	Printer selected status	Reflects the status of the SLCT input. 1 means 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.
STROBE	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.
SLC	Printer select input	This bit is inverted and output to the pin. It selects
		a printer.
IRQE	Interrupt request enable	When set to 1, interrupts are enabled. An interrupt
		is generated by the positive-going -ACK input.
PCD	Parallel control direction	When set to 1, port is in input mode. In printer
		mode, the printer is always in output mode
		regardless of the state of this bit.
PD0-PD7	Parallel Data Bits

2–26