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diff --git a/src/devices/bus/vme/mzr8300.cpp b/src/devices/bus/vme/mzr8300.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Joakim Larsson Edstrom
+/***************************************************************************
+ *
+ * Mizar VME8300 rev G 3U VME slave slot device
+ *
+ * 23/09/2015
+ *
+ * This device was drycoded based on OS9 boot strap code on a Mizar mz8105 board
+ * which expects to find a SIO on the VME bus + photos of a Mizar 8300 board on Ebay
+ * I have found no formal documents for this board so far, so needs verification.
+ *
+ * ||
+ * ||
+ * ||
+ * ||
+ * ||____________________________________________________________ ___
+ * \+++====|| U2|AM26LS32| | NEC | |74LS04N||74LS645 ||_| |
+ * \=/- o|| +--------+ | D7201C | ++-----+++----------+| | |
+ * | | || +-------+ +--------------------+ | | |SN74LS374N|| | |
+ * | | || U1| xxx | ____________________ | | +----------+| | |
+ * | | || +-------+ | NEC | |AMD | |SN74LS374N|| | |
+ * | | || | 7201C | |AM9513++----------+| | |
+ * | | || K10 +--------------------+ | APC ||PAL14L8 || |VME|
+ * | |==|| +-------+ K5 _______ | |+-----------+| | |
+ * | |==|| |MC1488P| K4 |SN74S38|| STC ||PAL20L8 || |P1 |
+ * | | || ++-------+--------+-+------++| |+-----------+| | |
+ * | | || K2 |AM26LS32|AM26LS32| 74S74 | |_____| |SN74LS244N|| | |
+ * | | || +--------+--------+--------+_______ +----------+| | |
+ * | | || | 74S74 | 74F85 | | | |
+ * | | || +-------+--------++-------++-------+ +----------+| | |
+ * /=\- o||J1 K1 U4| xxx | xxx | 74LS164| K6 |AM25LS2521|| | |
+ * /+++====|| J2 +-------+--------+--------+--------+ +----------+|_| |
+ * ||Rev G U3| MC1488| MC1488 | 74LS161| 74F85 | K8 | |___|
+ * ||-----------+-------+-----------------------------------------
+ * ||
+ * ||
+ *
+ *
+ * Misc links about this board:
+ * http://www.ebay.com/itm/MIZAR-INC-8300-0-01-REV-J-INTERFACE-CONTROL-BOARD-W-RIBBON-AND-PLATE-/231508658429?hash=item35e6fdc8fd
+ *
+ * Description
+ * ------------
+ * The Mizar mz8300 is a Quad Serial board.
+ *
+ * - Single High (3U) VME Slave board
+ * - Two upd7201 SIO Serial Input/Ouput
+ * - One AM9513 STC System Timing Controller
+ *
+ * Address Map (just guesses based on driver software behaviours)
+ * --------------------------------------------------------------------------
+ * Local VME Decscription
+ * -------------------------------------------------------------------------
+ * n/a 0xff0000 0xff0003 mzr8105.c Bootstrap expects to find a
+ * UPD7201 serial device here - configurable!
+ * --------------------------------------------------------------------------
+ *
+ * Interrupt sources MVME
+ * ----------------------------------------------------------
+ * Description Device Lvl IRQ VME board
+ * /Board Vector Address
+ * ----------------------------------------------------------
+ * On board Sources
+ *
+ * Off board Sources (other VME boards)
+ *
+ * ----------------------------------------------------------
+ *
+ * DMAC Channel Assignments
+ * ----------------------------------------------------------
+ * Channel
+ * ----------------------------------------------------------
+ *
+ * TODO:
+ * - Setup a working address map (STARTED)
+ * - Get documentation for the board
+ * - Add VME bus interface
+ * - Hook up a CPU board that supports this board (mzr8105.c)
+ * - Get terminal working through this device over the VME interface
+ *
+ ****************************************************************************/
+
+#include "emu.h"
+#include "mzr8300.h"
+
+#include "bus/rs232/rs232.h"
+
+#define VERBOSE (0) // (LOG_GENERAL)
+//#define LOG_OUTPUT_FUNC osd_printf_info
+#include "logmacro.h"
+
+
+#ifdef _MSC_VER
+#define FUNCNAME __func__
+#else
+#define FUNCNAME __PRETTY_FUNCTION__
+#endif
+
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(VME_MZR8300, vme_mzr8300_card_device, "mzr8300", "Mizar 8300")
+
+/* These values are borrowed just to get the terminal going and should be replaced
+ * once a proper serial board hardware (ie MZ 8300) is found and emulated. */
+
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+void vme_mzr8300_card_device::device_add_mconfig(machine_config &config)
+{
+ UPD7201(config, m_sio[0], XTAL(4'000'000));
+ m_sio[0]->out_txdb_callback().set("rs232p1", FUNC(rs232_port_device::write_txd));
+ m_sio[0]->out_dtrb_callback().set("rs232p1", FUNC(rs232_port_device::write_dtr));
+ m_sio[0]->out_rtsb_callback().set("rs232p1", FUNC(rs232_port_device::write_rts));
+
+ UPD7201(config, m_sio[1], XTAL(4'000'000));
+
+ rs232_port_device &rs232p1(RS232_PORT(config, "rs232p1", default_rs232_devices, "terminal"));
+ rs232p1.rxd_handler().set(m_sio[0], FUNC(upd7201_device::rxb_w));
+ rs232p1.cts_handler().set(m_sio[0], FUNC(upd7201_device::ctsb_w));
+
+ AM9513(config, m_stc, 4_MHz_XTAL);
+ m_stc->out1_cb().set(m_sio[0], FUNC(upd7201_device::rxca_w));
+ m_stc->out1_cb().append(m_sio[0], FUNC(upd7201_device::txca_w));
+ m_stc->out2_cb().set(m_sio[0], FUNC(upd7201_device::rxcb_w));
+ m_stc->out2_cb().append(m_sio[0], FUNC(upd7201_device::txcb_w));
+ m_stc->out3_cb().set(m_sio[1], FUNC(upd7201_device::rxca_w));
+ m_stc->out3_cb().append(m_sio[1], FUNC(upd7201_device::txca_w));
+ m_stc->out4_cb().set(m_sio[1], FUNC(upd7201_device::rxcb_w));
+ m_stc->out4_cb().append(m_sio[1], FUNC(upd7201_device::txcb_w));
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+vme_mzr8300_card_device::vme_mzr8300_card_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, type, tag, owner, clock)
+ , device_vme_card_interface(mconfig, *this)
+ , m_sio(*this, "sio%u", 0U)
+ , m_stc(*this, "stc")
+{
+ LOG("%s %s\n", tag, FUNCNAME);
+}
+
+vme_mzr8300_card_device::vme_mzr8300_card_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ vme_mzr8300_card_device(mconfig, VME_MZR8300, tag, owner, clock)
+{
+}
+
+void vme_mzr8300_card_device::device_start()
+{
+ LOG("%s %s\n", tag(), FUNCNAME);
+
+ /* Setup r/w handlers for first SIO in A16 */
+ vme_space(vme::AM_29).install_readwrite_handler(0, 1, // Channel B - Data
+ read8smo_delegate(m_sio[0], FUNC(z80sio_device::db_r)),
+ write8smo_delegate(m_sio[0], FUNC(z80sio_device::db_w)), 0x00ff);
+ vme_space(vme::AM_29).install_readwrite_handler(2, 3, // Channel B - Control
+ read8smo_delegate(m_sio[0], FUNC(z80sio_device::cb_r)),
+ write8smo_delegate(m_sio[0], FUNC(z80sio_device::cb_w)), 0x00ff);
+ vme_space(vme::AM_29).install_readwrite_handler(4, 5, // Channel A - Data
+ read8smo_delegate(m_sio[0], FUNC(z80sio_device::da_r)),
+ write8smo_delegate(m_sio[0], FUNC(z80sio_device::da_w)), 0x00ff);
+ vme_space(vme::AM_29).install_readwrite_handler(6, 7, // Channel A - Control
+ read8smo_delegate(m_sio[0], FUNC(z80sio_device::ca_r)),
+ write8smo_delegate(m_sio[0], FUNC(z80sio_device::ca_w)), 0x00ff);
+ vme_space(vme::AM_29).install_readwrite_handler(0x10, 0x13, // Am9513
+ read8sm_delegate(m_stc, FUNC(am9513_device::read8)),
+ write8sm_delegate(m_stc, FUNC(am9513_device::write8)), 0x00ff);
+}
+
+void vme_mzr8300_card_device::device_reset()
+{
+ LOG("%s %s\n", tag(), FUNCNAME);
+}
+
+#if 0
+uint8_t vme_mzr8300_card_device::read8(offs_t offset){
+ LOG("%s()\n", FUNCNAME);
+ return (uint8_t) 0;
+}
+
+void vme_mzr8300_card_device::write8(offs_t offset, uint8_t data){
+ LOG("%s()\n", FUNCNAME);
+}
+#endif