
188
Registers
Chapter 4
AMD-8111 HyperTransport I/O Hub Data Sheet
24674
Rev. 3.00
April 2003
AMD Preliminary Information
EIDE Subsystem ID and Subsystem Vendor ID Register
DevB:1x2C
Default:
0000 0000h.
Attribute:
Read-only.
EIDE Controller Interrupt Line, Interrupt Pin, Min. Grant, Max Latency Register
DevB:1x3C
Default:
0000 00FFh.
Attribute:
See below.
EIDE Controller Con
fi
guration Register
DevB:1x40
Default:
0000 040h.
Attribute:
See below.
Bits
31:16
SSID. Subsystem ID register.
This
fi
eld is write accessible through DevB:1x70.
15:0
SSVENDORID. Subsystem vendor ID register.
This
fi
eld is write accessible through DevB:1x70.
Description
Bits
31:24
MAX LATENCY.
Read-only. These bits are
fi
xed at their default values.
23:16
MIN GNT.
Read-only. These bits are
fi
xed at their default values.
15:8
INTERRUPT PIN.
Read-only. When either DevB:1x08[8] or DevB:1x08[10] is High, then
fi
eld reads as
01h. When they are both Low, then it reads as 00h.
7:0
INTERRUPT LINE.
This register is either read-write or read-only based on the state of
DevB:1x08[10,8]. When either DevB:1x08[8] or DevB:1x08[10] is High, then this is a read-write
register. When they are both Low, then it is a read-only register, reading FFh.
Description
Bits
31:24 Reserved.
23:20
RW.
Read-write. These bits control no hardware.
19:16
CABLE.
Read-write. These bits are intended to be programmed by BIOS to specify the cable type of
each of the IDE drives to the driver software. 1=High speed 80-pin cable is present. The bits specify
the following drive:
Bit[16]: primary master. Bit[18]: secondary master.
Bit[17]: primary slave. Bit[19]: secondary slave.
15
RW.
Read-write. This bit controls no hardware.
14
PRIPWB. Primary post write buffer.
Read-write. 1=The primary port posted-write buffer for PIO
modes is enabled. Note: only 32-bit writes to the data register are allowed when this bit is set.
13
RW.
Read-write. This bit is read-write accessible through software; it controls no hardware.
12
SECPWB. Secondary post write buffer.
Read-write. 1=The secondary port posted-write buffer for
PIO modes is enabled. Note: only 32-bit writes to the data register are allowed when this bit is set.
11
PHYOR. ATA PHY override.
Read-write. 1=ATA PHY slew rate controlled by
DevB:1x40[PHYORSEL]. 0=ATA PHY slew rate controlled by PHY select circuitry observed in
DevB:1x40[PHYSEL].
10
RW.
Read-write. This bit controls no hardware.
9:8
PHYORSEL. ATA PHY override select.
Read-write. These bits specify the override value of the PHY
speed select, as speci
fi
ed by DevB:1x40[PHYSEL]. This
fi
eld is ignored when DevB:1x40[PHYOR]=0.
7
Reserved. This bit is
fi
xed to 0.
Description