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DIRECT MEMORY ACCESS UNIT
Register Name:
Register Mnemonic:
Register Function:
15
Bit
Mnemonic
DSA19:16
DMA
Source
Address
NOTE: Reserved register bits are shown with gray shading. Reserved bits must be written
to a logic zero to ensure compatibility with future Intel products.
Figure 10-9. DMA Source Pointer (High-Order Bits)
10-16
DMA Source Address Pointer (High)
DxSRCH
Contains the upper 4 bits of the DMA Source pointer.
Reset
Bit Name
State
XXXXH
D
Function
DSA19:16 are driven on A19:16 during the
fetch phase of a DMA transfer.
0
D
D
D
S
S
S
S
A
A
A
A
1
1
1
1
9
8
7
6
A1185-0A
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