Interfaces and Connectors
EBX-22 Reference Manual
38
Parallel/Floppy Port
P
ARALLEL
P
ORT
O
PERATION
The EBX-22 includes a standard bi-directional/EPP/ECP compatible LPT port (connector J29)
that resides at the PC standard address of 378h. The port can be enabled or disabled and interrupt
assignments can be made via CMOS Setup. The LPT mode is also set via CMOS Setup.
This connector uses IEC 61000-4-2-rated TVS components to help protect against ESD damage.
Table 12: LPT Parallel/Floppy Port Pinout
J29 Pin
Centronics
Signal
Signal
Direction
1 Strobe
Out
2 Auto
feed
Out
3
Data bit 0
In/Out
4 Printer
error In
5
Data bit 1
In/Out
6 Reset
Out
7
Data bit 2
In/Out
8 Select
input Out
9
Data bit 3
In/Out
10
Data bit 4
In/Out
11
Data bit 5
In/Out
12
Data bit 6
In/Out
13
Data bit 7
In/Out
14 Ground
—
15 Acknowledge In
16 Ground
—
17 Port
busy
In
18 Ground
—
19 Paper
end
In
20 Printer
select In
P
ARALLEL
P
ORT
F
LOPPY
D
ISK
The parallel port on the EBX-22 can be used as a floppy disk interface. To use this feature:
1.
In CMOS Setup, select SIO > Parallel Port (J29) > Mode = [Floppy Drive (via CBL-
2501)].
2.
Connect the floppy drive to connector J29 using the CBR-2501/CBR-2003 combination
cables.
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