Astronics / EADS / Racal 1260-00C Slot 0 / Resource Manager

The Astronics/EADS/Racal 1260-00C is a VXIbus Slot 0 Resource Manager that bridges IEEE-STD-488 (GPIB) controllers to VXIbus instrument systems. It transparently translates GPIB signals and protocols into VXIbus instrument commands, enabling legacy GPIB controllers to manage VXIbus devices without host replacement. The module performs critical resource management functions including device identification, address mapping, configuration, self-test coordination, and commander/servant hierarchy establishment. It operates as either a VXIbus commander or servant, managing power-up resource allocation and device initialization when deployed in Slot 0.

## Technical Specifications

• **Interface Bridge:** Transparent conversion between IEEE-STD-488 (GPIB) and VXIbus protocols
• **VXIbus Master Mode:** Accesses A16 and A24 address spaces using D16 and D08 (EO) data transfers
• **VXIbus Slave Mode:** Supports A32, A24, A17, D17, and D08 (EO) data transfers
• **On-board RAM:** Dual-port configuration to VXIbus via switchable A32 or A24 address space
• **Block Transfers:** Bi-directional GPIB-to-VXIbus block transfer capability
• **GPIB Command Translation:** Handles IEEE-STD-488 common commands including Device Clear (DCL) and Selective Device Clear (SDC)
• **Secondary Address Mapping:** Routes GPIB communications to individual VXIbus instruments
• **Serial Poll Management:** Manages GPIB serial poll functions per VXIbus instrument

## Key Features

• Static and dynamic (switchless) VXIbus configuration
• VXIbus trigger line and protocol control
• Memory and register-based device access
• VME device control integration
• Each controlled VXIbus device appears as a unique GPIB instrument address
• System self-test management and initiation of normal operation

## Typical Applications

• Legacy GPIB system expansion into modular VXIbus architectures
• Mixed GPIB/VXIbus test environments
• System downsizing without controller replacement

## Compatibility & Integration

Operates within VXIbus mainframe Slot 0. Functions as both VXIbus commander and servant depending on system configuration requirements.