HP Dc7900 Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 60
Parallel Interface Connector, Table 5-5., DB-25 Parallel Connector Pinout
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Input/Output Interfaces 5.5.4 Parallel Interface Connector Figure 5-5 and Table 5-5 show the connector and pinout of the parallel connector provided on the optional parallel bracket/cable assembly. Note that some signals are redefined depending on the port's operational mode. Figure 5-5. DB-25 Parallel Interface Connector (as viewed from rear of chassis) Table 5-5. DB-25 Parallel Connector Pinout Pin Signal Function 1 STB- Strobe / Write [1] 2 D0 Data 0 3 D1 Data 1 4 D2 Data 2 5 D3 Data 3 6 D4 Data 4 7 D5 Data 5 8 D6 Data 6 9 D7 Data 7 10 ACK- Acknowledge / Interrupt [1] 11 BSY Busy / Wait [1] 12 PE Paper End / User defined [1] 13 SLCT Select / User defined [1] Pin Signal Function 14 LF- Line Feed [2] 15 ERR- Error [3] 16 INIT- Initialize Paper [4] 17 SLCTIN- Select In / Address. Strobe [1] 18 GND Ground 19 GND Ground 20 GND Ground 21 GND Ground 22 GND Ground 23 GND Ground 24 GND Ground 25 GND Ground -- -- -- NOTES: [1] Standard and ECP mode function / EPP mode function [2] EPP mode function: Data Strobe ECP modes: Auto Feed or Host Acknowledge [3] EPP mode: user defined ECP modes:Fault or Peripheral Req. [4] EPP mode: Reset ECP modes: Initialize or Reverse Req. 5-8 www.hp.com Technical Reference Guide