The configuration data services provided by the pdiag_cs_* functions (described in the previous table) define the interface by which the TU developer may obtain information about the device under test. The table below lists the standard attributes which may be available for a given device; however, not all attributes are supported for all devices, since some are specific to particular device types.
Normally, the TU developer should use this service to gather the required attribute information during the call to Test Unit TU_OPEN (the Test Unit which opens the device for testing), and save this device information for reference during subsequent Test Unit calls. This avoids the performance overhead of calling the configuration services many times during the execution of a set of Test Units.
| Standard Attribute | Description |
| slot_num | Slot number of adapter (for MCA, actual slot number, for PCI, device number) |
| bus_id | Adapter I/O bus ID value |
| bus_intr_lvl | Bus interrupt level |
| bus_io_length | Base address of bus I/O area |
| bus_mem_addr | Base address of Shared Bus Memory area |
| bus_mem_length | Length of Shared Bus Memory area |
| bus_type | Type of bus (for example, Microchannel, PCI, 60X) |
| dms_bus_flags | Bus flags for DMA operation (PCI/ISA only) |
| dma_bus_length | Length of bus memory DMA area in bytes (MCA only) |
| dma_bus_mem | Address of bus memory used for DMA (MCA only) |
| dma_chan_id | DMA channel ID of device |
| dma_flags | Flags to indicate DMA actions (MCA only) |
| dma_lvl | DMA bus arbitration level (MCA only) |
| bus_intr_lvl | Interrupt level |
| intr_flags | Interrupt flags |
| intr_priority | Interrupt priority |
| maxmaster | Maximum number of concurrent DMA master calls |
| parent | Parent device name |