Keysight / Agilent / HP E2074 GPIO/EISA Interface Card

The Keysight/Agilent/HP E2074 is an EISA and GPIO interface card that enables connection of external devices lacking standard interface protocols such as HP-IB or RS-232. The card supports 16-bit data exchange and operates as an EISA/ISA expansion slot card for HP Series 700 workstations and PCs. Two operational modes provide flexibility: Compatibility Mode emulates the HP 98622 GPIO interface, while Enhanced Mode delivers a bi-directional data port with auxiliary control lines for expanded I/O capability. ## Technical Specifications • Data Exchange: 16-bit capability • Interface Type: GPIO/EISA Bus • I/O Base Address: Configurable via DIP switch (factory default: hexadecimal 228); Switches 1, 2, and 3 determine address selection; Switch 4 unused • Data-In Clocking: Three selectable settings • Physical Weight: 3 lbs per unit ## Key Features • Dual Operating Modes: Compatibility Mode for legacy HP 98622 emulation; Enhanced Mode with auxiliary control lines • Connection Flexibility: Configurable handshake methods, multiple data-latching options, and selectable data width and polarity • Auxiliary Status and Control Lines: Extended control capability beyond base GPIO functionality • Address Configuration: DIP switch-selectable I/O base address with conflict avoidance for multi-interface installations ## Typical Applications Data acquisition and control systems requiring connection to external devices without inherent protocol support. The card accommodates applications needing flexible handshaking, variable data widths, and custom control signaling. ## Compatibility & Integration • Operating Systems: HP-UX versions 9.x and 10.x on Series 700 workstations; Microsoft Windows 95 or Windows NT on PCs • Hardware Requirements: EISA/ISA expansion slot • Installation: Standard card installation into expansion slot with DIP switch configuration of I/O base address prior to deployment