Programming the MVME240x
4
Introduction
This chapter provides basic information useful in programming the MVME240x. This includes a description of memory maps, control and status registers, PCI arbitration, interrupt handling, sources of reset, and big/little endian issues.
For additional programming information about the MVME240x, refer to the
For programming information about the PMCs, refer to the applicable user’s manual furnished with the PMCs.
Memory Maps
There are multiple buses on the MVME240x and each bus domain has its own view of the memory map. The following sections describe the MVME240x memory organization from the following three points of view:
❏The mapping of all resources as viewed by the MPU (processor bus memory map)
❏The mapping of onboard resources as viewed by PCI local bus masters (PCI bus memory map)
❏The mapping of onboard resources as viewed by VMEbus masters (VMEbus memory map)
Additional, more detailed memory maps can be found in the MVME2400- Series VME Processor Module Programmer’s Reference Guide .
