io128.h

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#define SPMCSR      (*(volatile unsigned char *)0x68)
#define UCSR0A      (*(volatile unsigned char *)0x0B)
#define UDR0        (*(volatile unsigned char *)0x0C)
#define MCUCR       (*(volatile unsigned char *)0x35) 
#define RAMPZ       (*(volatile unsigned char *)0x3B)
#define UBRR0H      (*(volatile unsigned char *)0x90)
#define UBRR0L      (*(volatile unsigned char *)0x09)
#define UCSR0B      (*(volatile unsigned char *)0x0A)
#define UCSR0C      (*(volatile unsigned char *)0x95)
#define OCR0        (*(volatile unsigned char *)0x31)
#define TCCR0       (*(volatile unsigned char *)0x33)
#define TIFR        (*(volatile unsigned char *)0x36)
/* USART0 Status Register A - UCSR0A */
#define    RXC0         7
#define    TXC0         6
#define    UDRE0        5
#define    FE0          4
#define    DOR0         3
#define    UPE0         2
#define    U2X0         1
#define    MPCM0        0