SECTION 6
Conversions and Interfaces
6-34 PEN*KEY
R
6200/6300 Hand-Held Computer Programmer’s Reference Guide
INT 10h, Function AH = 05h: Set Active Display Page
BIOS, FONTMAP
Makes the page (pointed to by AL) the active display page. All page numbers are
0Ćbased. Page 0 is default page number for all video modes, starts at beginning
of display memory. Pages 0ć7 may be selected for modes 0ć7 and 0x0D. Pages
0ć3 may be selected for mode 0x0E. Pages 0 and 1 may be selected for modes
0x0F and 0x10. Cursor position, display information maintained for pages
during switches.
"
NOTE:
For FONTMAP.EXE, only pages 0 and 1 are supported.
On Entry:
AH = 05h
AL = Page number (zero based)
On Return:
None
INT 10h, Function AH = 06h: Scroll Active Page Up
BIOS, FONTMAP
Allows active display page to scroll up number of lines indicated by AL. If AL =
0, entire window is blanked. Information outside scroll window indicated by CH,
CL, DH, and DL values is not altered. Works in all display modes. For 320x200
graphics modes, position determining window area is based on 40x25 display.
For 640x200 and 640x480 graphic modes, position used based on 80x25 display.
On Entry:
AH = 06h
AL = Number of lines to scroll
BH = Attribute for blank lines
CX = UpperĆleft corner
CH = Row
CL = Column
DX = LowerĆright corner
DH = Row
DL = Column
On Return:
None
6. Conversions and
Interfaces
