IBM 847651U Handbook - Page 171

Connecting external options Parallel port connector Parallel ports are used to communicate with printers and other devices, such as some CD-ROM and tape drives. Your server provides one 25-pin, D-shell connector on the back of the server. 13 1 25 14 This parallel port connector conforms to the Institute of Electrical and Electronics Engineers (IEEE) Standard 1284. There are three standard modes of operation: Standard Parallel Port (SSP) Enhanced Parallel Port (EPP) Extended Parallel Port (ECP) Table 5 shows the pin-number assignments for the parallel port connector. The signal names for all three modes are shown. SSP and ECP signal names are the same; EPP signal names that are different are shown in parentheses. Table 5. Parallel port connector pin-number assignments Pin Signal Pin Signal 1 -STROBE (-WRITE) 2 Data 0 3 Data 1 4 Data 2 5 Data 3 6 Data 4 7 Data 5 8 Data 6 9 Data 7 10 -ACK 11 BUSY (-WAIT) 12 PE 13 SLCT 14 -AUTO FD (-DSTRB) 15 -ERROR 16 -INIT 17 -SLCT IN (-ASTRB) 18 Ground 19 Ground 20 Ground 21 Ground 22 Ground 23 Ground 24 Ground 25 Ground Chapter 4. Installing options 137