BL=installed video memory as follows:
0 =
64K bytes installed
1 = 128K bytes installed
2 = 192k bytes installed
3 = 256K bytes installed
CH=feature bits (bits 4-7 of info_l shifted right)
CL=switches (bits 0-3 of info_l)
BL=20 select
this
BIOS's
screen routine,
which
supports all modes of this BIOS.
Input:
N o n e .
Output:
N o n e .
Note:
This
function selects the print screen routine
built
into this ROM to replace the standard BIOS
print screen routine.
BL=30 select scan lines for text modes.
Input:
AL=scan lines to set
(takes
change).
0 = 200
scan lines
1 = 350
scan lines
2 = 400
scan lines
Output:
AL=12h
effect on next mode
BL=31 set default palette load.
Input:
AL=# enable/disable palette loading.
0 = enable palette loading.
1 = disable palette loading.
Output:
AL=12h
BL=32 Enable/disable video.
Input:
AL=# enable/disable video.
0 = enable video.
1 = disable video.
Output:
AL=12h
-79-
Summary of Contents for Qtec VGA 1024
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Page 9: ...INSTALLATION ...
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Page 33: ...SOFTWARE UTILITIES ...
Page 34: ......
Page 48: ......
Page 49: ...SOFTWARE DRIVERS ...
Page 50: ......
Page 68: ......
Page 69: ...FOR SOFTWARE DEVELOPERS ...
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Page 104: ......
Page 105: ...HARDWARE REFERENCE ...
Page 106: ......
Page 111: ...SERVICE ...
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