Specifications

186 AMD Geode™ GeodeROM Functional Specification
Video BIOS Support
32087C
13.1.19.3 Subfunction 30h: Select Scan Lines
Sets the number of scan lines to be used in text mode to either 200, 350, or 400 lines. This setting takes effect on the
next mode set. Only text modes are affected by this function; graphics modes remain at the same resolution regardless
of this setting. Only modes 0, 1, 2, 3 can set a 200 scan line mode; mode 7 can only be set to 350 or 400 scan lines.
Scan Lines Default Color Font Default Monochrome Font
200 8x8 (double scanned) N/A
350 8x14 9x14
400 9x16 9x16
Passed:
Returns:
13.1.19.4 Subfunction 31h: Enable/Disable Palette Loading
Enables or disables the loading of the attribute controller palette registers, the Overscan register, and the RAMDAC
registers during mode sets.
Passed:
Returns:
Parameter Description
AH 12h
AL Scan lines:
0 = 200
1 = 350
2 = 400 lines
BL 30h
Parameter Description
AL 12h
Parameter Description
AH 12h
AL Enable palette load flag:
0 = Enable
1 = Disable
BL 31h
Parameter Description
AL 12h