I/O Port Transactions - DEC AlphaServer 8200 Technical Manual

The two Up Hose HDRs receive packets from the four Up Hoses (two
hoses per HDR) and transmit them to the IDRs through the Turbo Vortex
bus. The other two Down Hose HDRs receive packets from the IDRs
through the Turbo Vortex bus and transmit them to the four Down Hoses
(two hoses per HDR).
Figure 6-2 shows the major blocks of the KFTHA module.
Figure 6-2 I/O Port Block Diagram
TLSB Bus
128
MSB
ADDR
CNTL
128
LSB

6.3 I/O Port Transactions

The I/O port, together with the I/O adapter modules, provides the interface
path between the TLSB and the I/O devices. The I/O port transfers infor-
KFTHA Module
IDR_3 16
16
IDR_2
16
ICR
16
IDR_1
16
16
IDR_0
16
Down
64
HDR
64 Up
HDR
Down
64
HDR
64 Up
HDR
DC/DC
Converter
Hose 3
32
Hose 2
32
Hose 3
32
Hose 2 32
Hose 1
32
Hose 0
32
Hose 1
32
Hose 0
32
BXB0795.AI
I/O Port 6-3