diff --git a/src/devices/bus/coco/coco_fdc.cpp b/src/devices/bus/coco/coco_fdc.cpp
index 037c155fb63..9c63dafe5ef 100644
--- a/src/devices/bus/coco/coco_fdc.cpp
+++ b/src/devices/bus/coco/coco_fdc.cpp
@@ -493,6 +493,40 @@ namespace
 
 DEFINE_DEVICE_TYPE(COCO3_HDB1, coco3_hdb1_device, "coco3_hdb1", "CoCo3 HDB-DOS")
 
+//**************************************************************************
+//              COCO-2 HDB-DOS
+//**************************************************************************
+
+ROM_START(coco2_hdb1)
+	ROM_REGION(0x8000, "eprom", ROMREGION_ERASE00)
+	ROM_LOAD("hdbdw3bck.rom", 0x0000, 0x2000, CRC(867a3f42) SHA1(8fd64f1c246489e0bf2b3743ae76332ff324716a))
+	ROM_RELOAD(0x2000, 0x2000)
+	ROM_RELOAD(0x4000, 0x2000)
+	ROM_RELOAD(0x6000, 0x2000)
+ROM_END
+
+namespace
+{
+	class coco2_hdb1_device : public coco_fdc_device_base
+	{
+	public:
+		// construction/destruction
+		coco2_hdb1_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+			: coco_fdc_device_base(mconfig, COCO2_HDB1, tag, owner, clock)
+		{
+		}
+
+	protected:
+		// optional information overrides
+		virtual const tiny_rom_entry *device_rom_region() const override
+		{
+			return ROM_NAME(coco2_hdb1);
+		}
+	};
+}
+
+DEFINE_DEVICE_TYPE(COCO2_HDB1, coco2_hdb1_device, "coco2_hdb1", "CoCo2 HDB-DOS")
+
 //**************************************************************************
 //              Prológica CP-450 BASIC Disco V. 1.0 (1984)
 //
diff --git a/src/devices/bus/coco/coco_fdc.h b/src/devices/bus/coco/coco_fdc.h
index 7ca2ca9e6fe..a926de64c91 100644
--- a/src/devices/bus/coco/coco_fdc.h
+++ b/src/devices/bus/coco/coco_fdc.h
@@ -64,6 +64,7 @@ private:
 extern const device_type COCO_FDC;
 extern const device_type COCO_FDC_V11;
 extern const device_type COCO3_HDB1;
+extern const device_type COCO2_HDB1;
 extern const device_type CP450_FDC;
 extern const device_type CD6809_FDC;
 
diff --git a/src/devices/bus/coco/coco_multi.cpp b/src/devices/bus/coco/coco_multi.cpp
index e46d094aa8d..2333c2e4118 100644
--- a/src/devices/bus/coco/coco_multi.cpp
+++ b/src/devices/bus/coco/coco_multi.cpp
@@ -166,6 +166,7 @@ static SLOT_INTERFACE_START(coco_cart_slot1_3)
 	SLOT_INTERFACE("pak", COCO_PAK)
 SLOT_INTERFACE_END
 static SLOT_INTERFACE_START(coco_cart_slot4)
+	SLOT_INTERFACE("cc2hdb1", COCO2_HDB1)
 	SLOT_INTERFACE("cc3hdb1", COCO3_HDB1)
 	SLOT_INTERFACE("fdcv11", COCO_FDC_V11)
 	SLOT_INTERFACE("rs232", COCO_RS232)
diff --git a/src/mame/drivers/coco12.cpp b/src/mame/drivers/coco12.cpp
index ae287d84915..78574399992 100644
--- a/src/mame/drivers/coco12.cpp
+++ b/src/mame/drivers/coco12.cpp
@@ -352,6 +352,7 @@ INPUT_PORTS_END
 SLOT_INTERFACE_START( coco_cart )
 	SLOT_INTERFACE("fdc", COCO_FDC)
 	SLOT_INTERFACE("fdcv11", COCO_FDC_V11)
+	SLOT_INTERFACE("cc2hdb1", COCO2_HDB1)
 	SLOT_INTERFACE("cc3hdb1", COCO3_HDB1)
 	SLOT_INTERFACE("cp450_fdc", CP450_FDC)
 	SLOT_INTERFACE("cd6809_fdc", CD6809_FDC)