Tseng Qtec VGA 1024, Installation Manual

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AL 2 load ROM 8x8 double dot font into soft (text mode)
Input:
BL=# of soft font to load font into
Output:
None
AL=3 select fonts displayed (text mode)
Input:
BL=specification for high/low attribute bit 3:
bits 0-l=soft font # selected when attr bit 3 is 0.
bits 2-3=soft font # selected when attr bit 3 is 1.
Output:
N o n e .
Note: The following funtions AL=1X are the same as AL=0X,
except:
* The active page must be zero.
* The char_height variable will be recalculated.
* The crt_rows variable will be recalculated as:
INT((200 | 350 | 400 |)/char_height) - 1
* Regen_length will be recalculated as:
(crt_rows + 1 ) * crt_columns * 2
* The CRTC will be reprogrammed as:
Max scan line = char_height - 1
Cursor start = char_height - 2
Cursor end = char_height - 1
(cursor_type set via set_cursor_type BIOS function)
Vert disp end= ((crt_rows + 1 ) * char_height) - 1
[char_height*2 above if double scan]
Underline = char__height - 1 (monochrome modes
only)
AL=4 load ROM 8x16 font into soft font (text mode)
Input:
BL=# of soft font to load font into.
Output:
N o n e .
AL=10 load user font into soft font (text mode).
Input:
BH=# of bytes per character.
BL=# of soft font to load font into.
CX=# of characters to store.
DX=offset into table of first character to store.
E S :BP=pointer to font to load.
Output:
N o n e .
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