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DMA Unmasked Write with Data
The DMA Unmasked Write packet is a request on the Up Hose from the
I/O bus adapter to the I/O port for a TLSB data write transaction. The
data length of the unmasked write is always a double hexword and the
LEN code must indicate a double hexword (100).
This packet is supported by the Mailbox Only, I/O Window, Full, and Mem-
ory Channel variants of the hose protocol. Figure 6-28 shows the DMA
Unmasked Write packet.
Figure 6-28
DMA Unmasked Write Packet
DND <31:0>
31
xxxx
1*
2
3
4
17
18
* = Clock cycle
Table 6-31 gives the description of the DMA Unmasked Write packet.
24 23
0
0 0 0 0 0 0 0 0 0 0 0 0
ADDRESS <31:0>
LWDATA1 <31:0>
LWDATA2 <31:0>
LWDATA15 <31:0>
LWDATA16 <31:0>
11 10
8
7
1 0 0
ADR <39:32>
UPCTL
3
0
0
0 1 0 1
x x x x
x x x x
x x x x
x x x x
x x x x
BXB-0786-94
I/O Port 6-59
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