Specifications

AMD Geode™ GeodeROM Functional Specification 183
Video BIOS Support
32087C
13.1.18.12Subfunction 22h: Load 8x14 Graphics Character Set
Sets the INT 43h vector to a pointer to the 8x14 ROM font. This font pointer is used to draw all characters in graphics
modes except modes 4, 5, 6 which only use the lower 128 characters of this table. The pointer to the upper half of the
font for modes 4, 5, 6 is located at the INT 1Fh vector. The font pointer at the INT 43h vector is valid until the next
mode set or the next call to load a graphics character set.
Passed:
Returns:
None.
13.1.18.13Subfunction 23h: Load 8x8 Graphics Character Set
Sets the INT 43h vector to a pointer to the 8x8 ROM font. This font pointer is used to draw all characters in graphics
modes except modes 4, 5, 6 which only use the lower 128 characters of this table. The pointer to the upper half of the
font for modes 4, 5, 6 is only located at the INT 1Fh vector. The font pointer at the INT 43h vector is valid until the next
mode set or the next call to load a graphics character set.
Register DL passes the number of rows only if BL is set to 0 on entry. Otherwise, BL contains a row specifier:
Passed:
Returns:
None.
Parameter Description
AH 11h
AL 22h
BL Row specifier:
0 = User
1 = 14
2 = 25
3 = 43
CX Character height (bytes per character)
DL Rows: Passes the number of rows if BL is set to 0 on entry. Otherwise, BL contains a row specifier.
Parameter Description
AH 11h
AL 23h
BL Row specifier:
0 = User
1 = 14
2 = 25
3 = 43
DL Rows: Passes the number of rows if BL is set to 0 on entry. Otherwise, BL contains a row specifier.