diff --git a/devices/ioctrl/heathrow.cpp b/devices/ioctrl/heathrow.cpp
index 1613d72..ea46101 100644
--- a/devices/ioctrl/heathrow.cpp
+++ b/devices/ioctrl/heathrow.cpp
@@ -131,6 +131,8 @@ uint32_t HeathrowIC::dma_read(uint32_t offset, int size) {
         return this->enet_xmit_dma->reg_read(offset & 0xFF, size);
     case MIO_OHARE_DMA_ETH_RCV:
         return this->enet_rcv_dma->reg_read(offset & 0xFF, size);
+    case MIO_OHARE_DMA_ESCC_B_RCV:
+        return this->escc_b_rcv_dma->reg_read(offset & 0xFF, size);
     case MIO_OHARE_DMA_AUDIO_OUT:
         return this->snd_out_dma->reg_read(offset & 0xFF, size);
     default:
@@ -154,6 +156,9 @@ void HeathrowIC::dma_write(uint32_t offset, uint32_t value, int size) {
     case MIO_OHARE_DMA_ETH_RCV:
         this->enet_rcv_dma->reg_write(offset & 0xFF, value, size);
         break;
+    case MIO_OHARE_DMA_ESCC_B_RCV:
+        this->escc_b_rcv_dma->reg_write(offset & 0xFF, value, size);
+        break;
     case MIO_OHARE_DMA_AUDIO_OUT:
         this->snd_out_dma->reg_write(offset & 0xFF, value, size);
         break;
diff --git a/devices/ioctrl/macio.h b/devices/ioctrl/macio.h
index 6235202..d6b688c 100644
--- a/devices/ioctrl/macio.h
+++ b/devices/ioctrl/macio.h
@@ -406,6 +406,7 @@ private:
     std::unique_ptr<DMAChannel>     floppy_dma;
     std::unique_ptr<DMAChannel>     enet_xmit_dma;
     std::unique_ptr<DMAChannel>     enet_rcv_dma;
+    std::unique_ptr<DMAChannel>     escc_b_rcv_dma;
     std::unique_ptr<DMAChannel>     snd_out_dma;
 };