82801BA Datasheet, PDF (285/498 Pages) Intel Corporation – Intel 82801BA I/O Controller Hub 2 (ICH2) and Intel 82801BAM I/O Controller Hub 2 Mobile

LPC Interface Bridge Registers (D31:F0)
9.2
DMA I/O Registers
Table 9-2. DMA Registers
Port
Alias
Register Name/Function
00h
01h
02h
03h
04h
05h
06h
07h
08h
0Ah
0Bh
0Ch
0Dh
0Eh
0Fh
80h
81h
82h
83h
84h–86h
87h
88h
89h
8Ah
8Bh
8Ch–8Eh
8Fh
C0h
C2h
C4h
C6h
C8h
CAh
CCh
10h
11h
12h
13h
14h
15h
16h
17h
18h
1Ah
1Bh
1Ch
1Dh
1Eh
1Fh
90h
91h
–
93h
94h–96h
97h
98h
99h
9Ah
9Bh
9Ch–9Eh
9Fh
C1h
C3h
C5h
C7h
C9h
CBh
CDh
Channel 0 DMA Base & Current Address Register
Channel 0 DMA Base & Current Count Register
Channel 1 DMA Base & Current Address Register
Channel 1 DMA Base & Current Count Register
Channel 2 DMA Base & Current Address Register
Channel 2 DMA Base & Current Count Register
Channel 3 DMA Base & Current Address Register
Channel 3 DMA Base & Current Count Register
Channel 0–3 DMA Command Register
Channel 0–3 DMA Status Register
Channel 0–3 DMA Write Single Mask Register
Channel 0–3 DMA Channel Mode Register
Channel 0–3 DMA Clear Byte Pointer Register
Channel 0–3 DMA Master Clear Register
Channel 0–3 DMA Clear Mask Register
Channel 0–3 DMA Write All Mask Register
Reserved Page Register
Channel 2 DMA Memory Low Page Register
Channel 3 DMA Memory Low Page Register
Channel 1 DMA Memory Low Page Register
Reserved Page Registers
Channel 0 DMA Memory Low Page Register
Reserved Page Register
Channel 6 DMA Memory Low Page Register
Channel 7 DMA Memory Low Page Register
Channel 5 DMA Memory Low Page Register
Reserved Page Registers
Refresh Low Page Register
Channel 4 DMA Base & Current Address Register
Channel 4 DMA Base & Current Count Register
Channel 5 DMA Base & Current Address Register
Channel 5 DMA Base & Current Count Register
Channel 6 DMA Base & Current Address Register
Channel 6 DMA Base & Current Count Register
Channel 7 DMA Base & Current Address Register
Default
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
000001XXb
000000XXb
Undefined
Undefined
Undefined
0Fh
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
WO
RO
WO
WO
WO
WO
WO
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
82801BA ICH2 and 82801BAM ICH2-M Datasheet
9-23