NH82801FBM S L89K Intel, NH82801FBM S L89K Datasheet - Page 453
NH82801FBM S L89K
Manufacturer Part Number
NH82801FBM S L89K
Description
Manufacturer
Intel
Datasheet
1.NH82801FBM_S_L89K.pdf
(786 pages)
Specifications of NH82801FBM S L89K
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11.2.2
11.2.3
Intel
®
I/O Controller Hub 6 (ICH6) Family Datasheet
BMISP—Bus Master IDE Status Register (IDE—D31:F1)
Address Offset:
Default Value:
BMIDP—Bus Master IDE Descriptor Table Pointer Register
(IDE—D31:F1)
Address Offset:
Default Value:
31:2
Bit
4:3
Bit
1:0
7
6
5
2
1
0
PRD Interrupt Status (PRDIS) — R/WC.
0 = When this bit is cleared by software, the interrupt is cleared.
1 = Set when the host controller completes execution of a PRD that has its Interrupt bit (bit 2 of this
Drive 1 DMA Capable — R/W.
0 = Not Capable.
1 = Capable. Set by device dependent code (BIOS or device driver) to indicate that drive 1 for this
Drive 0 DMA Capable — R/W.
0 = Not Capable
1 = Capable. Set by device dependent code (BIOS or device driver) to indicate that drive 0 for this
Reserved. Returns 0.
Interrupt — R/WC. Software can use this bit to determine if an IDE device has asserted its interrupt
line (IDEIRQ).
0 = Software clears this bit by writing a 1 to it. If this bit is cleared while the interrupt is still active,
1 = Set by the rising edge of the IDE interrupt line, regardless of whether or not the interrupt is
Error — R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = This bit is set when the controller encounters a target abort or master abort when transferring
Bus Master IDE Active (ACT) — RO.
0 = This bit is cleared by the ICH6 when the last transfer for a region is performed, where EOT for
1 = Set by the ICH6 when the Start bit is written to the Command register.
Address of Descriptor Table (ADDR) — R/W. This field corresponds to A[31:2]. The Descriptor
Table must be DWord-aligned. The Descriptor Table must not cross a 64-K boundary in memory.
Reserved
register) set.
channel is capable of DMA transfers, and that the controller has been initialized for optimum
performance. The ICH6 does not use this bit. It is intended for systems that do not attach
BMIDE to the PCI bus.
channel is capable of DMA transfers, and that the controller has been initialized for optimum
performance. The ICH6 does not use this bit. It is intended for systems that do not attach
BMIDE to the PCI bus.
this bit will remain clear until another assertion edge is detected on the interrupt line.
masked in the 8259 or the internal I/O APIC. When this bit is read as 1, all data transferred from
the drive is visible in system memory.
data on PCI.
that region is set in the region descriptor. It is also cleared by the ICH6 when the Start bit is
cleared in the Command register. When this bit is read as 0, all data transferred from the drive
during the previous bus master command is visible in system memory, unless the bus master
command was aborted.
BMIBASE + 02h
00h
BMIBASE + 04h
All bits undefined
§
Description
Description
Attribute:
Size:
Attribute:
Size:
IDE Controller Registers (D31:F1)
R/WC
8 bits
R/W
32 bits
453
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