Paxar Gold 6037EX manual D R e a d C a

v i d R e a d C A

Description

Reads a character and attribute from the current cursor location for the specified display page.

Syntax

void far vidReadCA(unsigned char far* lpuchChr, unsigned char far* lpuchAttr, short sPage);

Parameters

lpuchChr A variable pointer to the character.

lpuchAttr A variable pointer to the character’s attribute. Returned values are:

0x07 Normal video

0x70 Reverse video

sPageThe display page. For 4-row printers, values are 0- 3. For 8-row printers, values are 0-1.

Return Values

None

Example

#include <stdio.h> #include "mmsultra.h"

void main(void)
{	// Character at position
unsigned char ucCharacter = 32;
unsigned char ucAttribute = 32;	// Attribute at position
vidSetPage(0);	// Set page
vidPutCursor(0, 0, 0);	// Move cursor
	// Read char and
	// attribute
vidReadCA(&ucCharacter, &ucAttribute, 0);
vidScroll(0, 0, 7, 19, 0, 0x07);	// Clear screen

4-104 Programmer’s Manual