2051er Serial Terminal

also hab ein Terminalprogramm für den 2051er, Quarz: 11,0592Mhz

Init Code:
void Init_Serial()
{
EA = 0;

TI = 0;        /* clear transmit interrupt */
TR1 = 0;         /* stop timer 1 */
ET1 = 0;         /* disable timer 1 interrupt */
//  PCON |= 0x80;    /* 0x80=SMOD: set serial baudrate TMOD &= ~0xF0; 
/*
clear timer 1 mode bits */
TMOD |= 0x20;    /* put timer 1 into MODE 2 */
TH1 = 0xFD;      // FD°

TR1 = 1;         /* start timer 1 */
EA = 1;           /* Enable Interrupts */

SM0 = 0;
SM1 = 1;          /* serial port MODE 1 */
SM2 = 0;
REN = 1;         /* enable serial receiver*/

TI = 0;        /* clear transmit interrupt */
RI = 0;        /* clear receiver interrupt */

ES = 1;        /* enable serial interrupts */
EA = 1;           /* Enable Interrupts */
}

void Send_Serial(unsigned char value)
{
SBUF = value;
SCON &= 0xFD;    // Byte Zurück Senden
}


void Comm_Serial() interrupt 4
{
if (TI != 0)    /* Received data interrupt */
{
TI = 0;
return;
}

if (RI != 0)    /* Received data interrupt */
{
RI = 0;
Send_Serial( SBUF );
}

SCON &= 0xFC;          // Clear S0 of IRF
}


So kann mir jedmand erklären warum das ding nicht Sauber das
zurückschickt was es empfängt???

0xFD sollte doch für 11,059 passen ...