Specifications

168 AMD Geode™ GeodeROM Functional Specification
Video BIOS Support
32087C
13.1.6 Function 05h - Set Active Display Page
Description:
Sets the displayable video memory to a new page. The number of video pages available are mode dependent. The
higher resolution and extended modes use only one video page (page 0).
Mode Pages
00h/01h 8
02h/03h 8
07h 8
0Dh 8
0Eh 4
0Fh/10h 2
All others 0
Passed:
Returns:
None.
13.1.7 Function 06h - Scroll Up
Description:
Causes a specified rectangular area of the screen to move up a given number of lines. The remaining rows at the bot-
tom of the area are cleared with a given fill attribute. The data outside of this area is unaffected. This function only
operates on the active page.
Setting the number of lines to scroll to a zero (“0”) causes the entire area to be cleared with the fill attribute. In text
mode, this fill attribute is a text attribute (part of the character/attribute pair that define characters in text mode). The
rectangular area is filled with a space character (ASCII 20h) and the fill attribute is used as the attribute in that region.
The standard fill attribute in text modes is a 07h.
In planar graphics mode, the fill attribute is actually the color to fill with. For example, a fill attribute of 02h actually fills
the area with a green rectangle. The standard fill attribute for graphics modes is a 00h.
Passed:
Returns:
None.
Parameter Description
AH 05h
DS Seg0
AL xxh = Page to set to
Parameter Description
AH 06h
DS Seg0
AL Number of lines:
0 = Blank entire window
BH Attribute used to blank line
CL Upper left column
CH Upper left row
DL Lower right column
DH Lower right row