HP 8712ES User Manual page 289

Table 7-2
Name
Attention
Interface Clear
Service Request
Remote Enable
End Or Identify
General Bus Management Lines
Mnemonic
ATN Controls whether the bus is in Command Mode
(ATN TRUE) or Data Mode (ATN FALSE).
IFC Initializes the interface to an idle state (no activity
on the bus).
SRQ Alerts the Controller to a need for communication.
REN Enables devices to respond to Remote Program
Control when addressed to listen.
EOI Indicates last data byte of a multibyte sequence;
also used with ATN to parallel poll devices for their
status bit.
ES User's Guide
Description
Front/Rear Panel
Connectors
7-9