Motorola MVME2400 - Manual (Page 114)

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Modifying the Environment
6
Initializes the PIRQx (PCI Interrupts) route control registers in the
IBC (PCI/ISA bus bridge controller). The ENV parameter is a 32-bit
value that is divided by 4 to yield the values for route control registers
PIRQ0/1/2/3. The default is determined by system type. For details on
PCI/ISA interrupt assignments and for suggested values to enter for
this parameter, refer to the 8259 Interrupts section of Chapter 5 in the
MVME2400-Series VME Processor Module Programmer’s Reference
Guide.
Note LED/Serial Startup Diagnostic Codes: these codes can be
displayed at key points in the initialization of the hardware
devices. Should the debugger fail to come up to a prompt, the
last code displayed will indicate how far the initialization
sequence had progressed before stalling. The codes are
enabled by an ENV parameter:
Serial Startup Code Master Enable [Y/N]=N?
A line feed can be inserted after each code is displayed to prevent it
from being overwritten by the next code. This is also enabled by an
ENV parameter:
Serial Startup Code LF Enable [Y/N]=N?
The list of LED/serial codes is included in the section on MPU,
Hardware, and Firmware Initialization in Chapter 1 of the PPCBug
Firmware Package User’s Manual.
Configuring the VMEbus Interface
ENV asks the following series of questions to set up the VMEbus interface
for the MVME240x modules. To perform this configuration, you should
have a working knowledge of the Universe ASIC as described in your
MVME2400-Series VME Processor Module Programmer’s Reference
Guide.
VME3PCI Master Master Enable [Y/N] = Y?
Y Set up and enable the VMEbus Interface. (Default)
N Do not set up or enable the VMEbus Interface.