FW82801EB S L73Z Intel, FW82801EB S L73Z Datasheet - Page 430
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FW82801EB S L73Z
Manufacturer Part Number
FW82801EB S L73Z
Description
Manufacturer
Intel
Datasheet
1.FW82801EB_S_L73Z.pdf
(671 pages)
Specifications of FW82801EB S L73Z
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IDE Controller Registers (D31:F1)
10.2
430
Table 155. Bus Master IDE I/O Registers
Bus Master IDE I/O Registers (IDE—D31:F1)
The bus master IDE function uses 16 bytes of I/O space, allocated via the BMIBA register, located
in Device 31:Function 1 Configuration space, offset 20h. All bus master IDE I/O space registers
can be accessed as byte, word, or DWord quantities. Reading reserved bits returns an
indeterminate, inconsistent value, and writes to reserved bits have no affect (but should not be
attempted). The description of the I/O registers is shown in
0C–0F
Offset
04–07
Bit
2
1
0
00
01
02
03
08
09
0A
0B
Secondary Drive 0 Base Clock (SCBO) — R/W.
0 = 33 MHz base clock for Ultra ATA timings.
1 = 66 MHz base clock for Ultra ATA timings.
Primary Drive 1 Base Clock (PCB1) — R/W.
0 = 33 MHz base clock for Ultra ATA timings.
1 = 66 MHz base clock for Ultra ATA timings.
Primary Drive 0 Base Clock (PCB0) — R/W.
0 = 33 MHz base clock for Ultra ATA timings.
1 = 66 MHz base clock for Ultra ATA timings.
Mnemonic
BMICP
BMISP
BMIDP
BMICS
BMISS
BMIDS
—
—
—
—
Bus Master IDE Command Primary
Reserved
Bus Master IDE Status Primary
Reserved
Bus Master IDE Descriptor Table Pointer Primary
Bus Master IDE Command Secondary
Reserved
Bus Master IDE Status Secondary
Reserved
Bus Master IDE Descriptor Table Pointer Secondary
Register Name
Intel
Description
®
82801EB ICH5 / 82801ER ICH5R Datasheet
Table
155.
xxxxxxxxh
xxxxxxxxh
Default
00h
00h
00h
00h
00h
00h
00h
00h
R/WC
R/WC
Type
R/W
R/W
R/W
R/W
RO
RO
RO
RO
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