Motorola MVME167 Series, Installation Manual, Page: 46 / 176

2-24
Board Level Hardware Description
2
Memory Maps
There are two points of view for memory maps:
1. Local bus memory map
Ð The mapping of all resources as viewed by local bus
masters
2. VMEbus memory map
Ð The mapping of onboard resources as viewed by VMEbus
masters
Local Bus Memory Map
The local bus memory map is split into different address spaces by
the transfer type (TT) signals. The local resources respond to the
normal access and interrupt acknowledge codes.
Normal Address Range
The memory map of devices that respond to the normal address
range is shown in the following tables. The normal address range is
defined by the Transfer Type (TT) signals on the local bus.
❏
On the MVME167, Transfer Types 0, 1, and 2 define the
normal address range.
Table 2-5 on page 2-25 is the entire map from $00000000 to
$FFFFFFFF. Many areas of the map are user-programmable, and
suggested uses are shown in the table.
❏
The cache inhibit function is programmable in the MMUs.
❏
The onboard I/O space must be marked cache inhibit and
serialized in its page table.
Table 2-6 on page 2-26 further defines the map for the local I/O
devices.