Personal Computer User Manual

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DEBUG Port ............................................................................................... 2-3
System Powerup ........................................................................................................ 2-3
Initialization Process ..........................................................................................2-4
CHAPTER 3 PPCBug Firmware
Introduction ............................................................................................................... 3-1
PPCBug Overview..................................................................................................... 3-1
Implementation and Memory Requirements......................................................3-3
Using PPCBug...........................................................................................................3-3
Hardware and Firmware Initialization ............................................................... 3-4
Default Settings ......................................................................................................... 3-6
CNFG - Configure Board Information Block ....................................................3-7
ENV - Set Environment ..................................................................................... 3-7
Configuring the PPCBug Parameters.......................................................... 3-8
LED/Serial Startup Diagnostic Codes..............................................................3-16
Configuring the VMEbus Interface..................................................................3-17
Firmware Command Buffer .............................................................................3-21
Standard Commands................................................................................................3-22
Diagnostics.......................................................................................................3-26
CHAPTER 4 Functional Description
Introduction ............................................................................................................... 4-1
Features Summary.....................................................................................................4-1
Features Descriptions ................................................................................................ 4-3
General ...............................................................................................................4-3
Processor ............................................................................................................4-5
System Memory Controller and PCI Host Bridge..............................................4-5
Memory .............................................................................................................. 4-5
Flash Memory .............................................................................................4-5
ECC SDRAM Memory...............................................................................4-6
P2 Input/Output (I/O) Modes ............................................................................. 4-7
Input/Output Interfaces.......................................................................................4-7
Ethernet Interface........................................................................................4-7
VMEbus Interface .......................................................................................4-8
Asynchronous Communications ................................................................. 4-8
Real-Time Clock & NVRAM & Watchdog Timer..................................... 4-8
Timers .........................................................................................................4-8
Interrupt Routing.........................................................................................4-8
IDSEL Routing............................................................................................4-9