Function RTDisplayCharAt

Function RTDisplayCharAt displays a characeter at a specific location on the screen:

void RTDisplayCharAt(int Col, int Row, WORD Ch);

Parameters

Col

Column. As long as RTDisplaySet has not been called, only values between 0..79 are supported.

Row

As long as RTDisplaySet has not been called, only values between 0..25 are supported.

Ch

The character to display (code page OEM 437). The upper 8 bits may contain text mode attributes (see below).

This function displays a character on the target's screen if the screen is being operated in RT_DISP_SCREEN or RT_DISP_GRAPHICS mode. For all other modes, this function does nothing. The current cursor position is not affected by this function.

The optional text mode attribute in the upper 8 bits of parameter Ch define the foreground (lows 4 bits) and background (upper 4 bits) color of the character, both in RT_DISP_SCREEN and RT_DISP_GRAPHICS mode. The colors are:

Value	Color
0	Black
1	Blue
2	Green
3	Cyan
4	Red
5	Magenta
6	Brown
7	Light Grey
8	Dark Grey
9	Light Blue
10	Light Green
11	Light Cyan
12	Light Red
13	Light Magenta
14	Light Brown
15	White

Please note that some VGA displays in text mode interpret attribute bit 0 as underline and bit 7 as blinking.

If no attribute bits are set, the default color (white on blank) or the attribute specified with function RTDisplaySet is used.

Function RTGetVideoRAMAddr

Down Function RTDisplayScroll