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-rw-r--r--src/devices/bus/isa/pds.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/src/devices/bus/isa/pds.c b/src/devices/bus/isa/pds.c
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+++ b/src/devices/bus/isa/pds.c
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+// license:BSD-3-Clause
+// copyright-holders:Barry Rodewald
+/*
+ * 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 "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()
+{
+}
+
+static MACHINE_CONFIG_FRAGMENT( pds_config )
+ MCFG_DEVICE_ADD("pds_ppi", I8255, 0)
+MACHINE_CONFIG_END
+
+machine_config_constructor isa8_pds_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( pds_config );
+}