diff --git a/.gitattributes b/.gitattributes
index 2c87253ea84..9b836f58ada 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -7989,6 +7989,8 @@ src/mess/machine/isa_ide.c svneol=native#text/plain
 src/mess/machine/isa_ide.h svneol=native#text/plain
 src/mess/machine/isa_mpu401.c svneol=native#text/plain
 src/mess/machine/isa_mpu401.h svneol=native#text/plain
+src/mess/machine/isa_pds.c svneol=native#text/plain
+src/mess/machine/isa_pds.h svneol=native#text/plain
 src/mess/machine/isa_sblaster.c svneol=native#text/plain
 src/mess/machine/isa_sblaster.h svneol=native#text/plain
 src/mess/machine/isa_ssi2001.c svneol=native#text/plain
diff --git a/src/mess/machine/isa_cards.c b/src/mess/machine/isa_cards.c
index 7e88eda5d67..f72d340d419 100644
--- a/src/mess/machine/isa_cards.c
+++ b/src/mess/machine/isa_cards.c
@@ -38,6 +38,7 @@ SLOT_INTERFACE_START( pc_isa8_cards )
 	SLOT_INTERFACE("ibm_mfc", ISA8_IBM_MFC)
 	SLOT_INTERFACE("wd1002a_wx1", ISA8_WD1002A_WX1)
 	SLOT_INTERFACE("dectalk", ISA8_DECTALK)
+	SLOT_INTERFACE("pds", ISA8_PDS)
 SLOT_INTERFACE_END
 
 SLOT_INTERFACE_START( pc_isa16_cards )
@@ -67,6 +68,7 @@ SLOT_INTERFACE_START( pc_isa16_cards )
 	SLOT_INTERFACE("ibm_mfc", ISA8_IBM_MFC)
 	SLOT_INTERFACE("fdcsmc", ISA8_FDC_SMC)
 	SLOT_INTERFACE("dectalk", ISA8_DECTALK)
+	SLOT_INTERFACE("pds", ISA8_PDS)
 	// 16-bit
 	SLOT_INTERFACE("ide", ISA16_IDE)
 	SLOT_INTERFACE("ne2000", NE2000)
diff --git a/src/mess/machine/isa_cards.h b/src/mess/machine/isa_cards.h
index 686a7812622..f8ffa21ef1c 100644
--- a/src/mess/machine/isa_cards.h
+++ b/src/mess/machine/isa_cards.h
@@ -52,6 +52,7 @@
 // communication ports
 #include "machine/pc_lpt.h"
 #include "machine/isa_com.h"
+#include "machine/isa_pds.h"
 
 // other
 #include "machine/isa_finalchs.h"
diff --git a/src/mess/machine/isa_pds.c b/src/mess/machine/isa_pds.c
new file mode 100644
index 00000000000..2bda9059120
--- /dev/null
+++ b/src/mess/machine/isa_pds.c
@@ -0,0 +1,76 @@
+/*
+ * isa_pds.c - Programmers Development System 8-bit ISA card
+ *
+ * Used to connect up to two 8-bit systems to the PC, allowing the download of assembled code directly to the
+ * target 8-bit system (Spectrum, CPC, MSX, C64 and maybe the BBC?)
+ *
+ * The editor software require the ISA card to be present.
+ *
+ * The PC end hardware consists of an 8-bit ISA card containing an 8255 PPI hooked up to the two connectors on the
+ * back of the card.
+ *
+ * The 8-bit end hardware consists of an expansion device containing a Z80PIO.
+ *
+ *  Created on: 31/01/2014
+ */
+
+#include "isa_pds.h"
+
+const device_type ISA8_PDS = &device_creator<isa8_pds_device>;
+
+isa8_pds_device::isa8_pds_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+		: device_t(mconfig, ISA8_PDS, "Programmers Development System", tag, owner, clock, "isa_pds", __FILE__),
+		device_isa8_card_interface( mconfig, *this ),
+		m_ppi(*this,"pds_ppi")
+{
+}
+
+
+READ8_MEMBER(isa8_pds_device::ppi_r)
+{
+	if(!(offset & 0x01))
+		return m_ppi->read(space,offset/2);
+	return 0xff;
+}
+
+WRITE8_MEMBER(isa8_pds_device::ppi_w)
+{
+	if(!(offset & 0x01))
+		m_ppi->write(space,offset/2,data);
+}
+
+void isa8_pds_device::device_start()
+{
+	set_isa_device();
+	m_isa->install_device(0x0300, 0x0307, 0, 0, read8_delegate(FUNC(isa8_pds_device::ppi_r),this), write8_delegate(FUNC(isa8_pds_device::ppi_w),this) );
+}
+
+void isa8_pds_device::device_reset()
+{
+
+}
+
+void isa8_pds_device::device_stop()
+{
+
+}
+
+I8255_INTERFACE(pds_ppi_intf)
+{
+	DEVCB_NULL, //m_in_pa_cb;
+	DEVCB_NULL, //m_out_pa_cb;
+	DEVCB_NULL, //m_in_pb_cb;
+	DEVCB_NULL, //m_out_pb_cb;
+	DEVCB_NULL, //m_in_pc_cb;
+	DEVCB_NULL, //m_out_pc_cb;
+};
+
+static MACHINE_CONFIG_FRAGMENT( pds_config )
+	MCFG_I8255_ADD("pds_ppi", pds_ppi_intf)
+MACHINE_CONFIG_END
+
+machine_config_constructor isa8_pds_device::device_mconfig_additions() const
+{
+	return MACHINE_CONFIG_NAME( pds_config );
+}
+
diff --git a/src/mess/machine/isa_pds.h b/src/mess/machine/isa_pds.h
new file mode 100644
index 00000000000..d0b69c9a195
--- /dev/null
+++ b/src/mess/machine/isa_pds.h
@@ -0,0 +1,38 @@
+/*
+ * isa_pds.h
+ *
+ *  Created on: 31/01/2014
+ */
+
+#ifndef ISA_PDS_H_
+#define ISA_PDS_H_
+
+#include "emu.h"
+#include "machine/isa.h"
+#include "machine/i8255.h"
+
+class isa8_pds_device :
+		public device_t,
+		public device_isa8_card_interface
+{
+public:
+		isa8_pds_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+		DECLARE_READ8_MEMBER(ppi_r);
+		DECLARE_WRITE8_MEMBER(ppi_w);
+
+		// optional information overrides
+		virtual machine_config_constructor device_mconfig_additions() const;
+
+		required_device<i8255_device> m_ppi;
+protected:
+		// device-level overrides
+		virtual void device_start();
+		virtual void device_reset();
+		virtual void device_stop();
+
+};
+
+extern const device_type ISA8_PDS;
+
+#endif /* ISA_PDS_H_ */
diff --git a/src/mess/mess.mak b/src/mess/mess.mak
index 46a80c080b3..77e948c0c3c 100644
--- a/src/mess/mess.mak
+++ b/src/mess/mess.mak
@@ -849,6 +849,7 @@ $(MESSOBJ)/isa.a: \
 	$(MESS_MACHINE)/isa_aha1542.o   \
 	$(MESS_MACHINE)/isa_wd1002a_wx1.o\
 	$(MESS_MACHINE)/isa_dectalk.o \
+	$(MESS_MACHINE)/isa_pds.o \
 	$(MESS_VIDEO)/isa_cga.o     \
 	$(MESS_VIDEO)/isa_svga_cirrus.o \
 	$(MESS_VIDEO)/isa_ega.o     \