FW82801EB Intel, FW82801EB Datasheet - Page 422

• Manufacturer Part Number: FW82801EB
• Manufacturer: Intel

Specifications of FW82801EB

• Lead Free Status / RoHS Status: Not Compliant

IDE Controller Registers (D31:F1)
10.1.14
10.1.15
10.1.16
422
BM_BASE — Bus Master Base Address Register
(IDE—D31:F1)
Address Offset:
Default Value:
The Bus Master IDE interface function uses Base Address register 5 to request a 16-byte I/O space
to provide a software interface to the Bus Master functions. Only 12 bytes are actually used
(6 bytes for primary, 6 bytes for secondary). Only bits [15:4] are used to decode the address.
IDE_SVID — Subsystem Vendor Identification
(IDE—D31:F1)
Address Offset:
Default Value:
Lockable:
IDE_SID — Subsystem Identification Register
(IDE—D31:F1)
Address Offset:
Default Value:
Lockable:
31:16
15:0
15:4
15:0
Bit
Bit
3:1
Bit
0
Subsystem ID (SID) — R/WO. The SID register, in combination with the SVID register, enables the
operating system (OS) to distinguish subsystems from each other. Software (BIOS) sets the value in
this register. After that, the value can be read, but subsequent writes to this register have no effect.
The value written to this register will also be readable via the corresponding SID registers for the
USB#1, USB#2, and SMBus functions.
Reserved
Base Address — R/W. This field provides the base address of the I/O space (16 consecutive I/O
locations).
Reserved
Resource Type Indicator (RTE) — RO. Hardwired to 1 indicating a request for I/O space.
Subsystem Vendor ID (SVID) — R/WO. The SVID register, in combination with the Subsystem ID
(SID) register, enables the operating system (OS) to distinguish subsystems from each other.
Software (BIOS) sets the value in this register. After that, the value can be read, but subsequent
writes to this register have no effect. The value written to this register will also be readable via the
corresponding SVID registers for the USB#1, USB#2, and SMBus functions.
20h
00000001h
2Ch
00h
No
2Eh
00h
No
–
–
–
23h
2Fh
2Dh
Description
Intel
Description
Description
Attribute:
Size:
Attribute:
Size:
Power Well: Core
Attribute:
Size:
Power Well: Core
®
82801EB ICH5 / 82801ER ICH5R Datasheet
R/W, RO
32 bits
R/WO
16 bits
R/WO
16 bits