Tseng Qtec VGA 1024, Installation Manual

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AH 8 Read character and attribute at cursor position.
Input:
BH=page to read from.
Output:
AH=attribute of character at cursor position.
AL=character read from cursor position.
Note: Attribute valid in text modes only. Only characters
drawn in white matched in graphics modes.
AH=9 Write character and attribute at cursor position.
Input:
AL=character to write at cursor position.
BH=page to write character and attribute to.
BL=attribute to wirte character with in text mode.
=foreground color in graphics mode.
CX=number of times to write character and attribute.
Output:
N o n e .
Note:
Note:
If bit 7 of BL is 1 in graphics mode, then the character
is XOR'd into video memory, else the character displaces
the previous contents of video memory. (XOR not valid in
256 color modes.)
In 256 color modes,
the value passed in BH is used as
the background color.
AH=0A Write character only at cursor position.
Input:
AL=character to write at cursor position.
BH=page to write character and attribute to.
BL=(in graphics modes only) foreground color for character.
CX=number of times to write character and attribute.
Output:
None.
Note: See notes for function AH=9 above.
AH=0B Color select for color/graphics adapter compatible modes.
Input:
BH=0 means set the background color specified by BL.
<>0 means set the palette specified by BL.
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