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Chip 1997 April (Special)
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Chip-Special_1997-04_cd.bin
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western
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wdc31
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wdc31.dsk
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IBMVESA
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TPADVESA.DOC
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1994-09-12
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2KB
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61 lines
About FRATE.DAT file
====================
A file named FRATE.DAT is created in the \IBMVESA\ directory during
the installation. Please modify the FRATE.DAT file with an editor
to match the frequency capabilities of your monitor.
FRATE.DAT Data Format
---------------------
A semicolon in the first column identifies a comment line.
'FRATE' is the keyword to recognize the refresh rate( scan rate) frequency.
The syntax of the line is as follows:
FRATE=XXXX
│││└── 4th column is 800x600 mode frequency.
│││ '0' : Reserved
│││ '1' : 60Hz for both 16/256 color
│││ '2' : 72Hz for both 16/256 color
│││ '3' : 72Hz for 16 color/60Hz for 256 color
│││ 'X' : Not supported
│││
││└─── 3rd column is 1024x768x16 mode frequency.
││ '0' : 43.5Hz Interlaced
││ '1' : 60Hz
││ '2' : Reserved
││ '3' : Reserved
││ 'X' : Not supported
││
│└──── 2nd column is 1024x768x256 mode frequency.
│ '0' : 43.5Hz Interlaced
│ '1' : 60Hz
│ '2' : Reserved
│ '3' : Reserved
│ 'X' : Not supported
│
└───── 1st column is 640x480x256,640x400x256 and standard VGA mode
frequency.
'0' : 60Hz (set non-iso CRT clock range forcedly)
'1' : 75Hz (set iso CRT clock range forcedly)
'2' : 72Hz for 256 color/60Hz for VGA mode
'3' : 75Hz for 256 color/60Hz for VGA mode
Example-1
;S-VGA mode F Rate Line Rate Video Clock
;640*480(256) 60Hz 31.469KHz 25.175MHz
;800*600(16/256) Not supported
;1024*768(16/256) Not supported
FRATE=0XXX
Example-2
;S-VGA mode F Rate Line Rate Video Clock
;640*480(256) 60Hz 31.469KHz 25.175MHz
;800*600(16/256) 72Hz 48.077KHz 50.000MHz
;1024*768(16/256) 60Hz 48.363KHz 65.000MHz
FRATE=0112