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Window Write Status Return Packet
The Window Write Status Return packet is used by adapters on remote
buses that support I/O window space packets to return the completion
status of a previously issued dense/sparse window write command packet.
The command field value of the Window Write Status Return packet is C
(hex).
This packet is supported by the Mailbox Only, I/O Window, Full, and Mem-
ory Channel variants of the hose protocol. Figure 6-32 shows the Window
Write Status Return packet.
Figure 6-32
Window Write Status Return Packet
UPD <31:0>
31 30 29 28 27 26 25
O E
VID
1*
* = clock cycle
Table 6-35 gives the description of the Window Write Status Return
packet.
Table 6-35 Window Write Status Return Packet Description
Field
Description
Is always zero.
Clock 1, <31>
Error. Set by the remote I/O bus adapter if any errors were detected on
Clock 1, <30>
the transfer.
NOTE: Bit <30> is ignored by the I/O port.
Virtual ID of the TLSB commander node.
Clock 1, <29:26>
NOTE: This field is not used by the I/O port.
Are always zero.
Clock 1, <25:10>
Count field. Used by the I/O port to obtain the maximum number of win-
Clock 1, <9:6>
dow transactions the remote I/O bus adapter is capable of queueing. The
value in this field should always be the same for a specific remote bus I/O
adapter. The I/O port keeps track of the number of buffers that have been
filled.
NOTE: The I/O port sets the value of its remote adapter node buffer count
field to one at power-up or system initialization. The I/O port sets its re-
mote adapter node buffer count field to the value in this count field upon
receiving a Window Write Status Return packet.
Are always zero.
Clock 1, <5:0>
6-64 I/O Port
10
9
Zero
Count
UPCTL
3
6
5
0
Zero
1 1 0 0
BXB-0565-94
0
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