cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 415

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

Revision 0.8
DMA Register Descriptions
5.13.2.21 Post Code Display Register (POST_DISPLAY)
I/O Address
Type
Reset Value
5.13.2.22 DMA Channel [3:0] Low Page (DMA_CH[x]_LO_PAGE)
DMA Channel 2 Low Page (DMA_CH2_LO_PAGE)
I/O Address
Type
Reset Value
DMA Channel 3 Low Page (DMA_CH3_LO_PAGE)
I/O Address
Type
Reset Value
.
Bit
7:0
Bit
7:0
7
7
Name
POST_CODE
Name
DMA_CH_LO_PAGE
080h
R/W
00h
081h
R/W
00h
082h
R/W
00h
6
6
Description
Post Code Display Value. This register is the historical Port 80 that receives the POST
(Power-On Self-Test) codes reported during initialization. Typically used by the BIOS,
Port 80 may also be written to by any piece of executing software to provide status or
other information. The most recent value written to Port 80 is recorded in this register.
5
5
DMA_CH[x]_LO_PAGE Bit Descriptions
DMA_CH[x]_LO_PAGE Register Map
(Continued)
POST_DISPLAY Bit Descriptions
Description
DMA Channel Low Page Value. Address bits [23:16].
POST_DISPLAY Register Map
DMA_CH_LO_PAGE
4
4
POST_CODE
415
DMA Channel 1 Low Page (DMA_CH1_LO_PAGE)
I/O Address
Type
Reset Value
DMA Channel 0 Low Page (DMA_CH0_LO_PAGE)
I/O Address Offset
Type
Reset Value
3
3
2
2
083h
R/W
00h
087h
R/W
00h
1
1
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