Memory Commands; Addr - Addressing Mode - EKE-Electronics CVB1621A Technical Manual

Command line interface

5.5 Memory commands

When you want to test the memory of an CVB module, you can use memory commands
to read and alter memory contents. In addition to testing the CVB module itself, you can
also use memory commands to verify the VME back plane bus. However, for testing
the backplane, you need to have a Gateway CPU available.
The memory commands can also help you trace application level failures as you can
inspect inbound and outbound queues with them.
These commands are mainly intended for troubleshooting in laboratory conditions, not
on board the train with an active system running.
The memory commands include:
addr
rm
sm

5.5.1 ADDR - Addressing mode

SYNTAX
addr [a|l]
a = Absolute addressing mode
l = Logical addressing mode
DEFAULT
The default is the I (Logical addressing mode).
EXPLANATION
Use this command to set the addressing mode to absolute or logical. This command is
needed before RM and SM commands. When you need to read the module memory or
write to it, you can use two addressing modes.
Absolute addressing refers to the complete 1 MByte physical address space of the
Z180 microcontroller. Logical addressing refers to the 16-bit address space directly
accessible by the MPU.
The following table contains a memory map for the complete 1 MByte physical address
space.
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CVB1621A and CVB2456A Technical Manual, ver. 3.00