IBM 86645RY Hardware Maintenance Manual - Page 156

Some application programs use only certain ports, and some modems are designed for use only at certain communication port addresses. You might need to use the Configuration/Setup Utility program to change communication port address assignments to resolve conflicts. Management port C: The server has a dedicated system-management I/O port. This port can be used to attach a modem that is dedicated to communication with the Netfinity Advanced System Management Processor. The connector on the back of the server and the pin-number assignments are the same as for the serial ports. 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 the server. It support 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 91 for the location of the connector.) 13 1 25 14 The following table shows the pin-number assignments for the parallel-port connector. Table 3. Parallel port pin-number assignments Pin I/O SPP/ECP Signal EPP Signal 1 O −STROBE 2 I/O Data 0 3 I/O Data 1 4 I/O Data 2 5 I/O Data 3 6 I/O Data 4 7 I/O Data 5 8 I/O Data 6 9 I/O Data 7 10 I −ACK 11 I BUSY 12 I PE (paper end) 13 I SLCT (select) 14 O −AUTO FD (feed) 15 I −ERROR 16 O −INIT 17 O −SLCT IN 18 - Ground 19 - Ground 20 - Ground 21 - Ground 22 - Ground 23 - Ground 24 - Ground 25 - Ground −WRITE Data 0 Data 1 Data 2 Data 3 Data 4 Data 5 Data 6 Data 7 −ACK −WAIT PE (paper end) SLCT (select) −DSTRB −ERROR −INIT −ASTRB Ground Ground Ground Ground Ground Ground Ground Ground 148 Netfinity Server HMM