addrmap Peripheral {
    default regwidth = 32;

    reg {
        field {
            name = "FIRST";
            sw = r;
        } first [7:0];
    } reg1 @ 0x0;

    reg {
        field {
            name = "SECOND";
            sw = w;
        } second [7:0];
    } reg2 @ 0x0;
};