82371AB Datasheet, PDF (146/284 Pages) Intel Corporation – PCI-TO-ISA / IDE XCELERATOR PIIX4

82371AB (PIIX4)
E
7.2.14. DEVCTL—DEVICE CONTROL REGISTER (IO)
I/O Address:
Default Value:
Attribute:
Base + (2Ch)
00h
Read/Write
Bit
Description
31:28 Reserved.
27 Device 8 Bus Master Reload Enable (BM_RLD_DEV8)—R/W. 1=Enable any PCI Bus Master
request (PHOLD#, PCIREQA[0:3]) to reload the device monitor idle timer. 0=Disable.
26 Device 3 Idle Reload Enable (IDL_RLD_EN_DEV3)—R/W. 1=Enable the device monitor 3 idle
reload events to reload the device monitor 3 idle timer. 0=Disable. When device 3 is being used as a
software SMI timer, this bit should be cleared to prevent any events from reloading the timer.
25 Device 13 Trap Enable (TRP_EN_DEV13)—R/W. 1=Enable generation of a trap SMI for accesses
to the device monitor 13 enabled trap decode ranges. 0=Disable.
24 Device 12 Trap Enable (TRP_EN_DEV12)—R/W. 1=Enable generation of a trap SMI for accesses
to the device monitor 12 enabled trap decode ranges. 0=Disable.
23 Device 11 Trap Enable (TRP_EN_DEV11)—R/W. 1=Enable generation of a trap SMI for accesses
to the device monitor 11 enabled trap decode ranges. 0=Disable.
22 Device 11 Idle Enable (IDL_EN_DEV11)—R/W. 1=Enable the device monitor 11 idle reload events
to reload the device monitor 11 idle timer. 0=Disable.
21 Device 10 Trap Enable (TRP_EN_DEV10)—R/W. 1=Enable generation of a trap SMI for accesses
to the device monitor 10 enabled trap decode ranges. 0=Disable.
20 Device 10 Idle Enable (IDL_EN_DEV10)—R/W. 1=Enable the device monitor 10 idle reload events
to reload the device monitor 10 idle timer. 0=Disable.
19 Device 9 Trap Enable (TRP_EN_DEV9)—R/W. 1=Enable generation of a trap SMI for accesses to
the device monitor 9 enabled trap decode ranges. 0=Disable.
18 Device 9 Idle Enable (IDL_EN_DEV9)—R/W. 1=Enable the device monitor 9 idle reload events to
reload the device monitor 9 idle timer. 0=Disable.
17 Device 8 Trap Enable (TRP_EN_DEV8)—R/W. 1=Enable generation of a trap SMI for accesses to
the device monitor 8 enabled trap decode ranges. 0=Disable.
16 Device 8 Idle Enable (IDL_EN_DEV8)—R/W. 1=Enable the device monitor 8 idle reload events to
reload the device monitor 8 idle timer. 0=Disable.
15 Device 7 Trap Enable (TRP_EN_DEV7)—R/W. 1=Enable generation of a trap SMI for accesses to
the device monitor 7 enabled trap decode ranges. 0=Disable.
14 Device 7 Idle Enable (IDL_EN_DEV7)—R/W. 1=Enable the device monitor 7 idle reload events to
reload the device monitor 7 idle timer. 0=Disable.
13 Device 6 Trap Enable (TRP_EN_DEV6)—R/W. 1=Enable generation of a trap SMI for accesses to
the device monitor 6 enabled trap decode ranges. 0=Disable.
12 Device 6 Idle Enable (IDL_EN_DEV6)—R/W. 1=Enable the device monitor 6 idle reload events to
reload the device monitor 6 idle timer. 0=Disable.
11 Device 5 Trap Enable (TRP_EN_DEV5)—R/W. 1=Enable generation of a trap SMI for accesses to
the device monitor 5 enabled trap decode ranges. 0=Disable.
146
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(until publication date)