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Parallel / Floppy Port
EPM-4 Reference Manual Reference – 31
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.
F
LOPPY 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.
P
ARALLEL / FLOPPY PORT PINOUT
Table 6: LPT1 Parallel / Floppy Port Pinout
J2
Pin
Centronics
Signal
Floppy
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
Floppy
J2
VL-CBL/CBR-2003
VL-CBL/CBR-2501
DB-25 connectors