SECTION 6
Conversions and Interfaces
6-20 PEN*KEY
R
6200/6300 Hand-Held Computer Programmer’s Reference Guide
INT 10h
4000 Series video functions are
not
available in the BIOS. This means that the
4000 Series display processing features listed below are not available in the
BIOS. Note that FONTMAP.EXE is provided to emulate the 4000 Series video
functions for porting applications from the 4000 Series platform to the 6200 or
6300 Computer.
"
Cursor Fixed and Cursor Chase modes are not supported by the VGA BIOS.
"
NorLib and PL/N cursor on and off functions are not supported.
"
InverseĆmode character mapping is not supported (characters above 127
are mapped to inverse video characters 0ć127 by turning off the high bit).
"
Read Light Pen Position and Mode (AH=04h) is not supported in VGA.
These 4000 Series functions are
not
supported by the BIOS:
"
Function AH = 12h, Subfunction BL = 0FAh: Set Physical Display Size
"
Function AH = 12h, Subfunction BL = 0FBh: Return Pointer to Current
Display Parameters
"
Function AH = 12h, Subfunction BL = 0FCh, AL = 0DDh: Return Invert
Mode Status
"
Function AH = 12h, Subfunction BL = 0FCh, AL = 0DEh: Enable Invert
Mode
"
Function AH = 12h, Subfunction BL = 0FCh, AL = 0DFh: Disable Invert
Mode
"
Function AH = 12h, Subfunction BL = 0FCh, AL = 0E0h: Set Chase Mode
"
Function AH = 12h, Subfunction BL = 0FCh, AL = 0E1h: Set Fixed Mode
"
Function AH = 12h, Subfunction BL = 0FDh: Return Physical Display Size
"
Function AH = 12h, Subfunction BL = 0FEh: Read/Write Contrast
(supported by 4000API.EXE)
"
Function AH = 12h, Subfunction BL = FFh: Backlight Off/On (supported
by 4000API.EXE)
"
Function AH = 14h, Subfunction AL = 00h: Load User Font
"
Function AH = 14h, Subfunction AL = 01h Load System Default Font
INT 13h
These 4000 BIOS INT 13h functions are not supported by the 6200/6300 BIOS
and are reserved for diagnostics:
"
Function 0Ah: Read Long Sectors
"
Function 0Bh: Write Long Sectors
Port Control BIOS Services: INT 14h
Support is provided by 4000API.EXE for porting 4000 Series applications to the
6200 or 6300 Computer. The following 4000 BIOS INT 14h functions are
not
supported by the 6200/6300 BIOS:
"
Function AH = 05h: Extended Port Control
"
Function AH = 0FFh: Port Power On/Off
6. Conversions and
Interfaces