Motorola MVME187 manual Disk I/O Support, Disk Support Facilities, Parameter Tables

Models: MVME187

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Disk I/O Support

Disk I/O Support

Disk I/O Support

187Bug can initiate disk input/output by communicating with intelligent disk controller modules over the VMEbus.

This section covers:

Blocks Versus Sectors

Device Probe Function

Disk I/O via 187Bug Commands

Disk I/O via 187Bug System Calls

Default 187Bug Controller and Device Parameters

Disk I/O Error Codes

Disk Support Facilities

Disk support facilities built into 187Bug consist of the following:

Command-level disk operations

Disk I/O system calls (only via one of the TRAP #496 instructions) for use by user programs

Defined data structures for disk parameters

Parameter Tables

Parameters such as the address where the module is mapped and the type and number of devices attached to the controller module are kept in tables by 187Bug. Default values for these parameters are assigned at powerup and cold-start reset, but may be altered as described in the section on default parameters, later in this chapter.

Supported Controllers

Appendix B contains a list of the controllers presently supported, as well as a list of the default configurations for each controller.

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Motorola MVME187 manual Disk I/O Support, Disk Support Facilities, Parameter Tables, Supported Controllers