I am using M95256 (ST make) EEPROM. My code is like this

#include <AT89S8252.H>

void main()
{
void SPI_out(int send,int l_add,int u_add);
void chip_command(int);
int i;
char a[50];
for(i = 0;i<50;i++)
a[i] = i;
EA = 1;
ES = 1;
SPCR = 0xD1;
P1 &= 0xEF;
chip_command(0x06);/* Write Enable for external EEPROM */
for(i=0;i<50;i++)
{
chip_command(0x02);
SPI_out(a[i],0x00+i,0x02);
}
chip_command(0x04);
SPCR = 0x04;
}

void SPI_out(int send,int l_add,int u_add)
{
DPH = u_add;
DPL = l_add;
SPDR = send;
while(SPSR != 0x80);
}

void chip_command(int command)
{
SPDR = command;
while(SPSR != 0x80);
}