Programming Model Rules (3)

Module ID Register

• Every module must have a unique ID reported by a (read only) Module ID register which should be at the same offset (preferably $0) in every module in the system.
• The value encodes the module type, revision and serial number of each module. The encoding should be same for every type of module in the system.
• Normally daughtercards should also have a unique ID.
• This allows the configuration to be verified, module changes to be tracked automatically. If the Module ID is at offset $0 it is also easy to scan the VME address space to determine the configuration.

Status Register

• Each module should have one or more Status registers.

Control Register

• Each module will usually have one or more Control registers.