Legacy Document
Important: The information in this document is obsolete and should not be used for new development.
Important: The information in this document is obsolete and should not be used for new development.
Chapter 5 - ADB Manager
This chapter describes the ADB Manager, the part of the Macintosh Operating System that allows you to get information about and communicate with hardware devices attached to the Apple Desktop Bus (ADB). On most Macintosh computers, the ADB is used to communicate with the keyboard, the mouse, and other user-input devices.The Macintosh Operating System contains standard keyboard and mouse handling routines that automatically take care of all required ADB access operations. Applications typically receive keyboard and mouse input by calling the Event Manager, not by calling the ADB Manager. For complete information about receiving and interpreting keyboard and mouse input, see the chapter "Event Manager" in Inside Macintosh: Macintosh Toolbox Essentials.
This chapter begins with an overview of the Apple Desktop Bus and the ADB Manager. It also shows how to
For detailed information about the ADB hardware, see Guide to the Macintosh Family Hardware, second edition.
- get information about devices attached to the ADB
- communicate with devices on the ADB at a very low level
- write a device handler for a new user-input device that connects to the ADB
Chapter Contents
- About the Apple Desktop Bus
- Characteristics of ADB Devices
- About the ADB Manager
- ADB Commands
- ADB Transactions
- ADB Device Registers
- Register 0
- Register 3
- Default ADB Device Address and Device Handler Identification
- ADB Device Table
- Address Resolution
- ADB Communication
- Using the ADB Manager
- Checking for the ADB Manager
- Getting Information About ADB Devices
- Communicating With ADB Devices
- Writing an ADB Device Handler
- Installing an ADB Device Handler
- Creating an ADB Device Handler
- ADB Manager Reference
- Data Structures
- ADB Data Block
- ADB Information Block
- ADB Operation Block
- ADB Manager Routines
- Initializing the ADB Manager
- Communicating Through the ADB
- Getting ADB Device Information
- Setting ADB Device Information
- Application-Defined Routines
- ADB Device Handlers
- ADB Command Completion Routines
- Summary of the ADB Manager
- Pascal Summary
- Data Types
- ADB Manager Routines
- Application-Defined Routines
- C Summary
- Data Types
- ADB Manager Functions
- Application-Defined Functions
- Assembly-Language Summary
- Data Structures
- Trap Macros
- Global Variables
- Result Codes