R_EB23
tda_reg("EXTENDED_BYTE_23 = 0x%02x\n", 0xff & regs[R_EB23]);
regs[R_EB23] = 0xb0;
regs[R_EB23] &= ~0x04; /* forcelp_fc2_en = 0 */
regs[R_EB23] &= ~0x02; /* XXX: lp_fc[2] = 0 */
regs[R_EB23] |= 0x04; /* forcelp_fc2_en = 1 */
regs[R_EB23] |= 0x02; /* lp_fc[2] = 1 */