User`s guide

4.1.4 DECchip 21071-DA CSR Space (1 A000 0000 to 1 AFFF FFFF)

The DECchip 21071-DA responds to all accesses in this space. Table 4–3

speciﬁes the registers and associated register addresses. Appendix A contains

the register descriptions.

Table 4–3 DECchip 21071-DA CSR Register Addresses

Address

1 A000 0000 21071-DA control and status register (DCSR)

1 A000 0020 PCI error address register (PEAR)

1 A000 0040 sysBus error address register (SEAR)

1 A000 0060 Dummy register 1

1 A000 0080 Dummy register 2

1 A000 00A0 Dummy register 3

1 A000 00C0 Translated base 1 register

1 A000 00E0 Translated base 2 register

1 A000 0100 PCI base 1 register

1 A000 0120 PCI base 2 register

1 A000 0140 PCI mask 1 register

1 A000 0160 PCI mask 2 register

1 A000 0180 Host address extension register 0 (HAXR0)

1 A000 01A0 Host address extension register 1 (HAXR1)

1 A000 01C0 Host address extension register 2 (HAXR2)

1 A000 01E0 PCI master latency timer register

1 A000 0200 TLB tag 0 register

1 A000 0220 TLB tag 1 register

1 A000 0240 TLB tag 2 register

1 A000 0260 TLB tag 3 register

1 A000 0280 TLB tag 4 register

1 A000 02A0 TLB tag 5 register

1 A000 02C0 TLB tag 6 register

1 A000 02E0 TLB tag 7 register

(continued on next page)

System Address Mapping 4–7