Dense Address Space Transaction Field Descriptions - DEC AlphaServer 8200 Technical Manual

Table 6-6

Dense Address Space Transaction Field Descriptions

Field
TLSB_BANK_NUM<<3:0>
TLSB_ADR<39>
TLSB_ADR<38:36>
TLSB_ADR<35:34>
TLSB_ADR<33:32>
TLSB_ADR<31:0>
The data appears on the first data cycle of the TLSB data bus. Eight Valid
bits appear on the second cycle of the TLSB data bus, one for each
longword, in the positions shown in Figure 6-8. The I/O port transmits all
the data to the PCI adapter.
Description
Contains the TLSB commander virtual ID (VID).
Indicates the address is an I/O address space reference. It will
always be one if the reference is in I/O address space.
Defines the responder TLSB node as follows:
TLSB_ADR<38:36>
0
1
2
3
4
Defines the hose number within the I/O port that is being ad-
dressed.
The Space Select field defines the type of PCI I/O transaction as
follows. It is transmitted on the hose as SPC<1:0>.
TLSB_ADR<33:32>
0
This field is the byte remote I/O bus target address. It maps to
ADR<31:0> on the remote I/O target bus. TLSB_ADR<4:0> are
always transmitted as zero.
Node Defined
Node 4 I/O window space
Node 5 I/O window space
Node 6 I/O window space
Node 7 I/O window space
Node 8 I/O window space
Node Defined
Dense memory space
I/O Port 6-21