Lynx EPM-4 manual Parallel / Floppy Port, Centronics Floppy Signal Pin Direction

Parallel / Floppy Port

Parallel / Floppy Port

PARALLEL PORT OPERATION

The EPM-4 includes a standard bi-directional/EPP/ECP compatible LPT port which resides at the PC standard address of 378h. The port can be enabled or disabled and interrupt assignments can be made via the CMOS setup screen. The LPT mode is also set via the CMOS setup screen.

This connector uses IEC 61000-4-2-rated TVS components to help protect against ESD damage.

FLOPPY PORT OPERATION

The parallel port can be used as a floppy disk interface. Select “FDD” as the LPT mode in CMOS Setup and connect a floppy disk drive to the parallel port cable (CBL/CBR-2003) using the floppy disk cable (CBL/CBR-2501). The diagram below shows how to connect the drive.

EPM-4

J2

DB-25 connectors

Floppy

VL-CBL/CBR-2003VL-CBL/CBR-2501

PARALLEL / FLOPPY PORT PINOUT

Table 6: LPT1 Parallel / Floppy Port Pinout

J2	Centronics	Floppy	Signal
Pin	Signal	Signal	Direction
1	Strobe	DS0*	Out
2	Auto feed	RPM	Out
3	Data bit 1	INDEX*	In/Out
4	Printer error	HDSEL*	In
5	Data bit 2	TRK0*	In/Out
6	Reset	FDIR	Out
7	Data bit 3	WP*	In/Out
8	Select input	STEP*	Out
9	Data bit 4	RDATA*	In/Out
10	Data bit 5	DSKCHG	In/Out
11	Data bit 6	N.C.	In/Out
12	Data bit 7	MTR0*	In/Out
13	Data bit 8	N.C.	In/Out
14	Ground	GND	—
15	Acknowledge	DS1*	In
16	Ground	GND	—
17	Port Busy	MTR1*	In
18	Ground	GND	—
19	Paper End	WDATA*	In
20	Select	WGATE*	In

EPM-4 Reference Manual Reference – 31