IBM eServer 240 xSeries, Руководство пользователя

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Parallel port
The parallel port usually is used to communicate with printers, and transfers data
one byte at a time. The parallel port has a 25-pin, female D-shell connector on the
back of your server. It supports three standard IEEE 1284 modes of operation:
Standard Parallel Port (SPP), Enhanced Parallel Port (EPP), and Extended
Capability Port (ECP). (See “Input/output connectors and expansion slots” on
page 11 for the location of the connector.)
13
1
25 14
The following table shows the pin-number assignments for the parallel-port
connector.
When you turn on your server, the POST routine assigns the parallel port a specific
port address. You can change the parallel-port assignment by using the
Configuration/Setup Utility program. See “Devices and I/O Ports” on page 22.
Table 5. Parallel port pin-number assignments
Pin I/O SPP/ECP Signal EPP Signal
1 O
−
STROBE
−
WRITE
2 I/O Data 0 Data 0
3 I/O Data 1 Data 1
4 I/O Data 2 Data 2
5 I/O Data 3 Data 3
6 I/O Data 4 Data 4
7 I/O Data 5 Data 5
8 I/O Data 6 Data 6
9 I/O Data 7 Data 7
10 I
−
ACK
−
ACK
11 I BUSY
−
WAIT
12 I PE (paper end) PE (paper end)
13 I SLCT (select) SLCT (select)
14 O
−
AUTO FD (feed)
−
DSTRB
15 I
−
ERROR
−
ERROR
16 O
−
INIT
−
INIT
17 O
−
SLCT IN
−
ASTRB
18 - Ground Ground
19 - Ground Ground
20 - Ground Ground
21 - Ground Ground
22 - Ground Ground
23 - Ground Ground
24 - Ground Ground
25 - Ground Ground
Chapter 4. Installing options
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