W83877TF Datasheet, PDF (153/154 Pages) Winbond – I/O chip disk drive adapter

W83877TF
765
43
21
0
Bit
Name
0
BIOS_EN
1
TMR_ON
2-7 Reserved
BIOS_EN
TMR_ON
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Description
This bit is raise the SMI event. When this bit is set and the ACPI software
writes a 1 to the GBL_RLS bit, an SMI event is raised on the SMI logic output.
This bit is used to turn on the power management timer. 1: timer on ; 0: timer
off.
Reserved.
8.4.20 General Purpose Event 1 Enable Register 2 (GP1EN2)
Register Location:
<CR34>+7H System I/O Space
Default Value:
00h
Attribute:
Read/write
Size:
8 bits
765
43
21
0
BIOS_RLS
BM_CNTRL
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Bit
Name
0 BIOS_RLS
1 BM_CNTRL
2-7 Reserved
Description
The BIOS release bit. This bit is used by the BIOS software to raise an event
to the ACPI software. The ACPI software has a corresponding enable and
status bit to control its ability to receive the ACPI event. Setting BIOS_RLS
sets GBL_STS, and it generates an SCI interrupt if GBL_EN is also set.
Writing a 1 to its bit position sets this bit and also sets the BM_STS bit.
Writing a 0 has no effect. This bit is cleared by writing a 1 to the GBL_STS
bit.
This bit is used to set the BM_STS bit and if the BM_RLD bit is also set, then
an SCI interrupt is generated. Writing a 1 sets BM_CNTRL to 1 and also sets
BM_STS. Writing a 0 has no effect. Writing a 1 to BM_STS clears BM_STS
and also clears BM_CNTRL.
Reserved.
- 127 -
Publication Release Date: March 1998
Version 0.61