SERIAL RECEPTION OF DATA

i did this code #include <REGX51.H>
#include<stdio.h>
#include<string.h>

#define rs P3_5 //pin4
#define rw P0_6 //pin5
#define en P3_4 //pin6

void delay(int);
void lcd_init();
void printlcd(unsigned char *str); void recieve() ; void lcd_display(char a); void lcd_command(char a);
char a;
unsigned int i;
unsigned char dat[12];
void main()
{ P1=0xFF; lcd_init(); printlcd("EMB LAB"); TMOD =0x20; //Timer1 in Mode2. TCON=0x40; TH1=-3; // 9600 Baud rate at 11.0592MH SCON=0x50; // Asynchronous mode 8-bit data and 1-stop bit //IE=0x90; TR1=1;
while(1)
{

while (RI==0); lcd_command(0xC0); ACC=SBUF; lcd_display(ACC); RI=0; delay(100);
} }

/* /// Not used in this unction//////////////////
void lcd_ready()
{ en=0;
P1=0x80;
rs=0; //Control register
rw=1; //Read
wait:
en=0;
en=1;
if(P1_7==1)goto wait;
P1=0x00;
en=0;
} */
/////////////////////////////////////////////////
void lcd_display(char a)
{ //lcd_ready();
delay(100);
P1=a;
rs=1;
rw=0;
en=1;
en=0;
}

void lcd_command(char a)
{ //lcd_ready();
delay(100);
P1=a;
rs=0;
rw=0;
en=1;
en=0;
}

void delay (int temp)
{ int i;
for(i=0; i<=temp;i++);
}

void lcd_init()
{ lcd_command(0x38);/*8 bit/char,2 row of character*/ lcd_command(0x0C);/*Screen and cursor on, no blink*/ lcd_command(0x06);/*shift cursor right*/ lcd_command(0x01); lcd_command(0x80);
} //////////////////////////////////////////////////////
void printlcd(unsigned char *str)
{ unsigned char len,i;

len=strlen(str);

for(i=0;i<=len-1;i++) { lcd_display(*str); str++; }
}

but when i check the ACC and port it did not change according to SBUF but when we change SBUF the SBUF value changes.