User`s guide

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DWMBB Adapter

All VAXBI I/O window space references are stated as bb + nn, where bb is

the nodespace starting address on the VAXBI, which is computed by the

equation:

For 32-bit address:

bb = E000 0000 + (200 000 * XMI Node ID) + (2000 * VAXBI Node ID)

For 30-bit address:

bb = 2000 0000 + (200 000 * XMI Node ID) + (2000 * VAXBI Node ID)

If, however, the VAXBI Window Space Enable bit (ACSR<5>) is set, the

equation becomes:

For 32-bit address:

bb = E000 0000 + (200 0000 * AUTLR<13:0>) + (2000 * VAXBI Node ID)

For 30-bit address:

bb = 2000 0000 + (200 0000 * AUTLR<13:0>) + (2000 * VAXBI Node ID)

Table 3–9 lists the XMI registers on the DWMBB/A module. Table 3–10

lists the registers on the DWMBB/B module. Table 3–11 lists the VAXBI

registers. The conventions used for the register descriptions are given in

Table 3–12.

See Chapter 5 of the VAXBI Options Handbook for a description of the

VAXBI registers, except for the VAXBI Device Register. The remainder

of Section 3.11 gives detailed descriptions of the DWMBB registers. The

DWMBB/A module registers are presented ﬁrst, followed by the mapping

registers, then the DWMBB/B module registers, and ﬁnally the VAXBI

Device Register is presented.

Table 3–9 XMI Registers on the DWMBB/A Module

Name Mnemonic

Address

Device Register XDEV BB + 0000 0000

Bus Error Register XBER BB + 0000 0004

Failing Address Register XFADR BB + 0000 0008

Responder Error Address Register AREAR BB + 0000 000C

Error Summary Register AESR BB + 0000 0010

Interrupt Mask Register AIMR BB + 0000 0014

Implied Vector Interrupt Destination/Diagnostic

AIVINTR BB + 0000 0018

Diagnostic 1 Register ADG1 BB + 0000 001C

Utility Register AUTLR BB + 0000 0020

Control and Status Register ACSR BB + 0000 0024

The ﬁrst letter of the mnemonic indicates the following:

X=XMI register, resides on the DWMBB/A XMI module

A=Resides on the DWMBB/A XMI module

B=Resides on the DWMBB/B VAXBI module

The abbreviation "BB" refers to the base address of an XMI node (the address of the

ﬁrst location of the nodespace).

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