OpenVMS I/O User's Reference Manual

The HP OpenVMS I/O User's Reference Manual provides comprehensive information for system programmers on utilizing I/O drivers directly. It details the Queue I/O (QIO) interface, ancillary control processes (ACPs), and specific device drivers for storage and communication hardware, including:

• ACP-QIO Interface: Explains the Queue I/O interface to file system ancillary control processes.
• Device Drivers: Covers disk, magnetic tape, mailbox, terminal, pseudoterminal, shadow-set, and Generic SCSI class drivers.
• LAN Device Drivers: Describes local area network drivers and the OpenVMS Generic SCSI class driver.
• Performance Optimization: Includes information on Fast I/O and Fast Path features for Alpha and Integrity servers.

The manual is applicable to OpenVMS Version 8.4 and includes numerous programming examples, function code summaries, and structural descriptions of data blocks (FIB, IOSB, AUCB, S2DGB).