Motorola MVME2400 manual Configuring the VMEbus Interface

6

Modifying the Environment

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?

YSet up and enable the VMEbus Interface. (Default)

NDo not set up or enable the VMEbus Interface.

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