Owner`s manual

Chapter 6
DWMBB Adapter Registers
The DWMBB adapter consists of two modules: an XMI module in the XMI
card cage and a VAXBI module in the VAXBI card cage. Table 6–1 lists
the DWMBB registers: some of which are XMI required registers, some
DWMBB/A registers, some DWMBB/B registers, and the VAXBI Device
Register for the DWMBB/B module.
Register addresses for a particular device in a system are found by adding
an offset to the base address for that device. To distinguish between
addresses in VAXBI address space and addresses in XMI address space,
we use the following convention:
lowercase bb + offset indicates an address in VAXBI address space
uppercase BB + offset indicates an address in XMI address space
DWMBB Adapter Registers 6–1