Usb devices, Open firmware – Apple iMac User Manual
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P R E F A C E
USB Devices
0
For more information about USB on the Macintosh computer, developers
should refer to Apple Computer’s
Mac OS USB DDK ATI Reference
. Information
is also available on the World Wide Web, at:
For full specifications of the Universal Serial Bus, developers should refer to the
USB Implementation Forum on the World Wide Web, at:
Open Firmware
0
Three Technotes provide an introduction to Open Firmware on the Macintosh
platform. They are:
TN 1061: Open Firmware, Part I
, available on the Technote web site at
TN 1062: Open Firmware, Part II
, available on the Technote web site at
TN 1044: Open Firmware, Part III
, available on the Technote web site at
The New World software architecture described in Chapter 5, “Software,”
follows some of the standards defined by the Open Firmware IEEE 1274-1995
specification and the CHRP binding.
The basis for the bootinfo file format and use is the document
PowerPC
™
Microprocessor Common Hardware Reference Platform (CHRP
™
) System binding to:
IEEE Std 1275-1994 Standard for Boot (Initialization, Configuration) Firmware
. A
bootinfo file contains Open Firmware script, a description, information for
individual operating systems, icons, along with other information. A bootinfo
file can be extended to contain non-Open Firmware information, such as
“Trampoline” code and the ToolBox ROM Image.
Other Open Firmware references of possible interest include:
IEEE 1275-1994 Standard for Boot (Initialization, Configuration) Firmware: Core
Requirements and Practices