Did I mean I was looking for something ready to use? I so, I blame it on my poor English.

Anyway,

void lcd_dados(unsigned char pdata dados)
{
1 LCD_RD = 1;
2 LCD_CD = 0;
//3 P0 = dados;
4 LCD_CE = 0;
5 LCD_WR = 0;
6 LCD_WR = 0;
7 LCD_WR = 1;
8 LCD_CE = 1;
//9 P0 = 0xFF;
}

//***Schematic AT89C51***///

Port 0 = D0 ~ D7
LCD_WR =P3^6;
LCD_RD =P3^7;
LCD_CE =P2^5;
LCD_CD =P2^6;
LCD_RST=P2^7;
LCD_FS =P3^5;

Question:

If I make P0 = dados, I reckon the compiler treats Port 0 as an I/0 and not as a memory mapped i/o. Am I right?

How can I deal with it using keil compiler.
I have an assembler code that works fine, however I need to migrate to C.

Regards,