#include <90s8515.h>
#include <stdio.h>

/* quartz crystal frequency [Hz] */
#define xtal 4000000L

/* Baud rate */
#define baud 9600

void main(void) {
char k;

/* initialize the UART's baud rate */
UBRR=xtal/16/baud-1;

/* initialize the UART control register
   RX & TX enabled, no interrupts, 8 data bits */
UCR=0x18;

while (1) {
        /* receive the character */
        k=getchar();
        /* and echo it back */
        putchar(k);
        };
}