Compsee Apex III, Technical Reference Manual

Page: 35 / 168

Apex PDT Technical Reference Manual 3 Hardware Configuration
COAM30002 Rev. 2.00 8/13/02
3-15
Detailed BIOS Interrupt Information
BIOS Interrupt 10h – Video Functions
Function 11h, Service 02h –
Set 8 High Font
Input:
ah = 11h
al = 02h to set 8 high font
Returns:
Carry Flag clear if successful
Carry Flag set on error
Notes:
q
This function sets the Apex PDT displayed font
height to 8.
q
Using an 8 high font results in a 20 row display.
q
The current number of screen rows minus one can be
accessed through logical address 0040h:0084h. A
value of 19 implies an 8 high font is in use.
q
Changing the video mode resets the font size;
therefore, this function should be called
after the
video mode has been set.
Function 11h, Service 04h –
Set 16 High Font
Input:
ah = 11h
al = 04h to set 16 high font
Returns:
Carry Flag clear if successful
Carry Flag set on error
Notes:
q
This function sets the Apex PDT displayed font
height to 16.
q
Using an 16 high font results in a 10 row display.
q
The current number of screen rows minus one can be
accessed through logical address 0040h:0084h. A
value of 9 implies a 16 high font is in use.
q
Changing the video mode resets the font size;
therefore, this function should be called
after the
video mode has been set.