Hi friends

I the following SDCC C code

- my aim is to assign 2 byte of the TIMER0 to unsigned int "i"

when Iam assigning TH0 to "i" port1 is showing FFh( not working ). but when j is assigned to i port is showing 6h(working).

in first case why code is not working and in other case it is working why?
so I request to everybody to help in this regard

#include<8052.h>
void main(void){

unsigned int i = 0xffff;
unsigned char j = 0xff;

TH0 = 0xff;
TL0 = 0xff;
i = TH0;
// i = j;
i = i << 8;
P1 = i/10000;// P1 should display 6

}