diff --git a/src/emu/bus/isa/hdc.c b/src/emu/bus/isa/hdc.c
index 0d866e4580b..79dc7185d00 100644
--- a/src/emu/bus/isa/hdc.c
+++ b/src/emu/bus/isa/hdc.c
@@ -149,6 +149,7 @@ INPUT_PORTS_END
 //**************************************************************************
 
 const device_type ISA8_HDC = &device_creator<isa8_hdc_device>;
+const device_type ISA8_HDC_EC1841 = &device_creator<isa8_hdc_ec1841_device>;
 
 //-------------------------------------------------
 //  machine_config_additions - device-specific
@@ -190,6 +191,19 @@ isa8_hdc_device::isa8_hdc_device(const machine_config &mconfig, const char *tag,
 		device_t(mconfig, ISA8_HDC, "Fixed Disk Controller Card", tag, owner, clock, "hdc", __FILE__),
 		device_isa8_card_interface(mconfig, *this)
 {
+	m_type = STANDARD;
+}
+
+isa8_hdc_device::isa8_hdc_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) :
+		device_t(mconfig, type, name, tag, owner, clock, shortname, source),
+		device_isa8_card_interface(mconfig, *this)
+{
+}
+
+isa8_hdc_ec1841_device::isa8_hdc_ec1841_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+		isa8_hdc_device( mconfig, ISA8_HDC_EC1841, "EC1841 HDC", tag, owner, clock, "hdc_ec1841", __FILE__)
+{
+	m_type = EC1841;
 }
 
 //-------------------------------------------------
@@ -750,7 +764,7 @@ void isa8_hdc_device::pc_hdc_data_w(int data)
 
 		*buffer_ptr++ = data;
 		// XXX ec1841 wants this
-		if (buffer[0] == CMD_SETPARAM && data_cnt == 9) {
+		if (buffer[0] == CMD_SETPARAM && data_cnt == 9 && (m_type == EC1841)) {
 			status &= ~STA_READY;
 		} else {
 			status |= STA_READY;
diff --git a/src/emu/bus/isa/hdc.h b/src/emu/bus/isa/hdc.h
index 7aadb51ea32..7fdf067bc96 100644
--- a/src/emu/bus/isa/hdc.h
+++ b/src/emu/bus/isa/hdc.h
@@ -25,6 +25,7 @@ class isa8_hdc_device :
 public:
 		// construction/destruction
 		isa8_hdc_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+		isa8_hdc_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source);
 
 		// optional information overrides
 		virtual machine_config_constructor device_mconfig_additions() const;
@@ -89,6 +90,12 @@ protected:
 		void get_drive();
 		void get_chsn();
 		int test_ready();
+
+		enum {
+			STANDARD,
+			EC1841
+		};
+		int m_type;
 public:
 		void hdc_command();
 		void pc_hdc_data_w(int data);
@@ -101,7 +108,14 @@ public:
 };
 
 
+class isa8_hdc_ec1841_device : public isa8_hdc_device
+{
+public:
+	isa8_hdc_ec1841_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+};
+
 // device type definition
 extern const device_type ISA8_HDC;
+extern const device_type ISA8_HDC_EC1841;
 
 #endif  /* ISA_HDC_H */
diff --git a/src/emu/bus/isa/xsu_cards.c b/src/emu/bus/isa/xsu_cards.c
index f32a21ce907..992eaf222d6 100644
--- a/src/emu/bus/isa/xsu_cards.c
+++ b/src/emu/bus/isa/xsu_cards.c
@@ -48,7 +48,7 @@ SLOT_INTERFACE_START( ec184x_isa8_cards )
 	SLOT_INTERFACE("ec1841.0004", ISA8_EC1841_0004)	// BSC-like serial ports + parallel port
 */
 	SLOT_INTERFACE("mda", ISA8_MDA)
-	SLOT_INTERFACE("hdc", ISA8_HDC)
+	SLOT_INTERFACE("hdc", ISA8_HDC_EC1841)
 	SLOT_INTERFACE("pccom", ISA8_COM)
 	SLOT_INTERFACE("pclpt", ISA8_LPT)
 	SLOT_INTERFACE("xtide", ISA8_XTIDE)