diff --git a/devices/ioctrl/grandcentral.cpp b/devices/ioctrl/grandcentral.cpp
index cc08e7b..ee6af53 100644
--- a/devices/ioctrl/grandcentral.cpp
+++ b/devices/ioctrl/grandcentral.cpp
@@ -93,6 +93,18 @@ GrandCentral::GrandCentral() : PCIDevice("mac-io/grandcentral"), InterruptCtrl()
 
     // connect serial HW
     this->escc = dynamic_cast<EsccController*>(gMachineObj->get_comp_by_name("Escc"));
+    this->escc_a_tx_dma = std::unique_ptr<DMAChannel> (new DMAChannel("Escc_a_tx"));
+    this->escc_a_rx_dma = std::unique_ptr<DMAChannel> (new DMAChannel("Escc_a_rx"));
+    this->escc_b_tx_dma = std::unique_ptr<DMAChannel> (new DMAChannel("Escc_b_tx"));
+    this->escc_b_rx_dma = std::unique_ptr<DMAChannel> (new DMAChannel("Escc_b_rx"));
+    this->escc_a_tx_dma->register_dma_int(this, this->register_dma_int(IntSrc::DMA_SCCA_Tx));
+    this->escc_a_rx_dma->register_dma_int(this, this->register_dma_int(IntSrc::DMA_SCCA_Rx));
+    this->escc_b_tx_dma->register_dma_int(this, this->register_dma_int(IntSrc::DMA_SCCB_Tx));
+    this->escc_b_rx_dma->register_dma_int(this, this->register_dma_int(IntSrc::DMA_SCCB_Rx));
+    this->escc->set_dma_channel(0, this->escc_a_tx_dma.get());
+    this->escc->set_dma_channel(1, this->escc_a_rx_dma.get());
+    this->escc->set_dma_channel(2, this->escc_b_tx_dma.get());
+    this->escc->set_dma_channel(3, this->escc_b_rx_dma.get());
 
     // connect MESH (internal SCSI)
     this->mesh = dynamic_cast<MeshController*>(gMachineObj->get_comp_by_name("MeshTnt"));
@@ -206,6 +218,14 @@ uint32_t GrandCentral::read(uint32_t rgn_start, uint32_t offset, int size)
             return this->curio_dma->reg_read(offset & 0xFF, size);
         case MIO_GC_DMA_FLOPPY:
             return this->floppy_dma->reg_read(offset & 0xFF, size);
+        case MIO_GC_DMA_ESCC_A_XMIT:
+            return this->escc_a_tx_dma->reg_read(offset & 0xFF, size);
+        case MIO_GC_DMA_ESCC_A_RCV:
+            return this->escc_a_rx_dma->reg_read(offset & 0xFF, size);
+        case MIO_GC_DMA_ESCC_B_XMIT:
+            return this->escc_b_tx_dma->reg_read(offset & 0xFF, size);
+        case MIO_GC_DMA_ESCC_B_RCV:
+            return this->escc_b_rx_dma->reg_read(offset & 0xFF, size);
         case MIO_GC_DMA_AUDIO_OUT:
             return this->snd_out_dma->reg_read(offset & 0xFF, size);
         case MIO_GC_DMA_AUDIO_IN:
@@ -308,6 +328,18 @@ void GrandCentral::write(uint32_t rgn_start, uint32_t offset, uint32_t value, in
         case MIO_GC_DMA_FLOPPY:
             this->floppy_dma->reg_write(offset & 0xFF, value, size);
             break;
+        case MIO_GC_DMA_ESCC_A_XMIT:
+            this->escc_a_tx_dma->reg_write(offset & 0xFF, value, size);
+            break;
+        case MIO_GC_DMA_ESCC_A_RCV:
+            this->escc_a_rx_dma->reg_write(offset & 0xFF, value, size);
+            break;
+        case MIO_GC_DMA_ESCC_B_XMIT:
+            this->escc_b_tx_dma->reg_write(offset & 0xFF, value, size);
+            break;
+        case MIO_GC_DMA_ESCC_B_RCV:
+            this->escc_b_rx_dma->reg_write(offset & 0xFF, value, size);
+            break;
         case MIO_GC_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 3bde0f2..f06bd5f 100644
--- a/devices/ioctrl/macio.h
+++ b/devices/ioctrl/macio.h
@@ -187,6 +187,13 @@ private:
     std::unique_ptr<DMAChannel>     snd_out_dma;
     std::unique_ptr<DMAChannel>     snd_in_dma;
     std::unique_ptr<DMAChannel>     floppy_dma;
+    std::unique_ptr<DMAChannel>     escc_a_tx_dma;
+    std::unique_ptr<DMAChannel>     escc_a_rx_dma;
+    std::unique_ptr<DMAChannel>     escc_b_tx_dma;
+    std::unique_ptr<DMAChannel>     escc_b_rx_dma;
+
+    uint16_t unsupported_dma_channel_read = 0;
+    uint16_t unsupported_dma_channel_write = 0;
 };
 
 class OHare : public PCIDevice, public InterruptCtrl {