Boot Console Handler (BCH) & Processor Dependent Code (PDC)

As mentioned earlier, HP-UX systems come with firmware installed called Processor Dependent Code (PDC). After the system is powered on or the processor is RESET, the PDC runs self test operations and initializes the processor. PDC also identifies the console path so that it can provide messages and accept input. PDC would then begin the “autoboot” process, unless you were to interrupt it during the 10-second interval that is supplied. If you interrupt the “autoboot” process, you can issue a variety of commands.

The following example shows booting an rp54xx system and the PDC-related messages ...

Get HP-UX 11i System Administration Handbook and Toolkit, Second Edition now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.