user manual

PrPMC800/800ET Processor PMC Module Installation and Use (PrPMC800A/IH5)

6 Modifying the Environment

Refer to the PPCBug Firmware Package User’s Manual for a listing of network

controller modules currently supported by PPCBug. (Default = $00)

Network Auto Boot Abort Delay = 5?

The time in seconds that the NETboot sequence will delay before starting the

boot. The purpose for the delay is to allow you the option of stopping the boot

by use of the

BREAK key. The time value is from 0-255 seconds. (Default = 5

seconds)

Network Auto Boot Configuration Parameters Offset

(NVRAM) = 00001000?

The address where the network interface configuration parameters are to be

saved/retained in NVRAM; these parameters are the necessary parameters to

perform an unattended network boot. A typical offset might be $1000, but this

value is application-specific. (Default = $00001000)

Caution

If you use the NIOT debugger command, these parameters need to be saved

somewhere in the offset range $00001000 through $000016F7. The NIOT

parameters do not exceed 128 bytes in size. The setting of this ENV pointer

determines their location. If you have used the same space for your own

program information or commands, they will be overwritten and lost.

You can relocate the network interface configuration parameters in this space

by using the ENV command to change the Network Auto Boot Configuration

Parameters Offset from its default of $00001000 to the value you need to be

clear of your data within NVRAM.

Note

This number is still an offset within NVRAM. However, the NVRAM image for

Bug is stored at the end of flash bank A (in the last 32K).

Memory Size Enable [Y/N] = Y?

Memory Size Starting Address = 00000000?

The default Starting Address is $00000000.

Memory Size Ending Address = 02000000?

The default Ending Address is the calculated size of local memory. If the

memory start is changed from $00000000, this value will also need to be

adjusted.

DRAM Speed in NANO Seconds = 60?

The default setting for this parameter will vary depending on the speed of the

DRAM memory parts installed on the board. The default is set to the slowest

speed found on the available banks of DRAM memory.

Y Memory will be sized for Self Test diagnostics. (Default)

N Memory will not be sized for Self Test diagnostics.