Hitachi SH7751 Hardware Manual page 884

Always write to this register prior to target transfers. Specify the starting address (physical
address) of the memory installed on the local bus according to the address space being used. Bits
28 to 26 of the PCI local address register 0 select the local address area. Bits 25 to 20 show the
address within that area.
Bits 31 to 29—Reserved: These bits always return 0 when read. Always write 0 to these bits.
Bits 28 to 20—Local Address (LAR28 to 20): Specify bits 28 to 20 of the starting address of the
local address space.
Bits 19 to 0—Reserved: These bits always return 0 when read. Always write 0 to these bits.
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