This manual is organized into the following chapters
Chapter 1 describes the Queue I/O (QIO) interface to file
system ancillary control processes (ACPs).
Chapters 2 through 9 describe
the use of file-structured and real-time I/O device drivers, the drivers
for storage devices such as disks and magnetic tapes, and supported
Chapter 2 discusses the disk drivers.
Chapter 3 discusses the magnetic tape drivers.
Chapter 4 discusses the mailbox driver.
Chapter 5 discusses the terminal
Chapter 6 discusses the pseudoterminal driver.
Chapter 7 discusses the shadow-set
virtual unit driver.
Chapter 8 discusses the Generic Small Computer System
Interface (SCSI) class driver.
Chapter 9 discusses the local area network (LAN) device
Chapter 10 describes optional features to improve OpenVMS
Alpha I/O performance.
Appendix A summarizes the QIO function codes, arguments,
and function modifiers used by the drivers listed previously.
Appendix B describes the enhanced IO$_DIAGNOSE function
for SCSI class drivers.
Appendix C lists the DEC Multinational character set and
the ANSI and DIGITAL private escape sequences for terminals.
Appendix D describes the calling conventions for the pseudoterminal
driver's control connection routines.
Appendix E describes the SYS$UGDRIVER.EXE generic driver,
which allows users to support USB devices such as scanners and smart-card
readers without writing a USB device driver.