R_EB13
regs[R_EB13] = 0xc1;
regs[R_EB13] &= ~0x7c; /* clear k & m bits */
regs[R_EB13] |= (0x7c & val);
tda_reg("EXTENDED_BYTE_13 = 0x%02x\n", 0xff & regs[R_EB13]);
tda18271_write_regs(fe, R_EB13, 1);
tda18271_write_regs(fe, R_EB13, 1);