NAR-5620 Series
User
’
s
Manual
18
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High2 : output GPO19 high again , and keep high always.
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; Programming Guide :
; PG_Step1 : Enable ACPI IO port assignment and get PMBASE, then save to
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EBX_Bit[31..16]
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First : GPI_ROUT bit[13,12] P [0,0] : Let GPI6 not evoke SCI.
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Write GPI_Rout bit[13,12] to [0,0] for no effect on GPI6
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( B0:D31:F0:Offset_B8h-Bit[13,12]P[0,0] , no SCI event evoked)
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Second: Enabe ACPI IO port by setting ACPI_EN bit7
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B0:D31:F0:Offset_44h_bit7P1
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Third : Get PMBASE ( ACPI I/O port BAR ) and
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save to EBX_bit[31..16].
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PMBASE=:B0:D31:F0:Offset[40..43h]
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Let Bit0 = 0.( PCI_BAR bit0 returns 1 for a IO_BAR )
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; PG_Step2 : Enable GPIO IO function and get GPIOBASE, then save to
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ECX_Bit[31..16]
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How to program GPIO39 ( Output only , i.e. GPO39 )
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Get GPIOBASE =: B0:D31:F0:Offset[48..4Bh] ;(and let bit0 = 0 )
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GPIO_CNTL =: B0:D31:F0:Offset_4Ch_bit4P1 ;Enable ICH7R GPIO
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GPIO39
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GP_LVL (=:(GP 0Ch))_bit39P[0/1]; Write value 0/1
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