AMR_QREG_IDB
v = amr_inl(amr, AMR_QREG_IDB);
amr_outl(amr, AMR_QREG_IDB,
amr_outl(amr, AMR_QREG_IDB, (amr->amr_mbox_paddr+16) | AMR_QIDB_ACK);
while ((amr_inl(amr, AMR_QREG_IDB) & AMR_QIDB_ACK) != 0)