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Diffstat (limited to 'src/devices/bus/bml3/bml3bus.c')
-rw-r--r--src/devices/bus/bml3/bml3bus.c241
1 files changed, 241 insertions, 0 deletions
diff --git a/src/devices/bus/bml3/bml3bus.c b/src/devices/bus/bml3/bml3bus.c
new file mode 100644
index 00000000000..5839ea00196
--- /dev/null
+++ b/src/devices/bus/bml3/bml3bus.c
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+// license:GPL-2.0+
+// copyright-holders:Jonathan Edwards
+/***************************************************************************
+
+ bml3bus.c - Hitachi MB-6890 slot bus and card emulation
+
+ Adapted from a2bus by Jonathan Edwards
+
+ Pinout (/ indicates an inverted signal, ie, one that would have a bar over it
+ on a schematic diagram)
+
+ out <-> CPU CPU <-> out
+ ---------- -----------
+ +5V <-- 1 2 <-> GND
+ D0 <-> 3 4 <-> D1
+ D2 <-> 5 6 <-> D3
+ D4 <-> 7 8 <-> D5
+ D6 <-> 9 10 <-> D7
+ A0 <-> 11 12 <-> A1
+ A2 <-> 13 14 <-> A3
+ A4 <-> 15 16 <-> A5
+ A6 <-> 17 18 <-> A7
+ A8 <-> 19 20 <-> A9
+ A10 <-> 21 22 <-> A11
+ A12 <-> 23 24 <-> A13
+ A14 <-> 25 26 <-> A15
+ BA <-- 27 28 --> BS
+ /ROM-KIL --> 29 30 --> EXROM-KIL
+ R/W IN --> 31 32 --> /EX-I/O
+ R/W OUT <-- 33 34 --> VMA OUT
+ E <-- 35 36 --> Q
+ /RES <-- 37 38 <-- /NMI
+ /IRQ --> 39 40 <-- /FIRQ
+ /HALT --> 41 42 <-- /VMA CTRL
+ /DMA --> 43 44 --> /BANK-SW
+ HALT ACK <-- 45 46 <-- SOUND IN
+ 16MCK <-- 47 48 <-> GND
+ 2MCK <-- 49 50 <-> GND
+ -5V <-- 51 52 --> /EX-I/O2
+ -12V <-- 53 54 --> +12V
+ GND <-> 55 56 --> +5V
+
+***************************************************************************/
+
+#include "emu.h"
+#include "emuopts.h"
+#include "bml3bus.h"
+
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+const device_type BML3BUS_SLOT = &device_creator<bml3bus_slot_device>;
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// bml3bus_slot_device - constructor
+//-------------------------------------------------
+bml3bus_slot_device::bml3bus_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, BML3BUS_SLOT, "Hitachi MB-6890 Slot", tag, owner, clock, "bml3bus_slot", __FILE__),
+ device_slot_interface(mconfig, *this)
+{
+}
+
+bml3bus_slot_device::bml3bus_slot_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_slot_interface(mconfig, *this)
+{
+}
+
+void bml3bus_slot_device::static_set_bml3bus_slot(device_t &device, const char *tag, const char *slottag)
+{
+ bml3bus_slot_device &bml3bus_card = dynamic_cast<bml3bus_slot_device &>(device);
+ bml3bus_card.m_bml3bus_tag = tag;
+ bml3bus_card.m_bml3bus_slottag = slottag;
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void bml3bus_slot_device::device_start()
+{
+ device_bml3bus_card_interface *dev = dynamic_cast<device_bml3bus_card_interface *>(get_card_device());
+
+ if (dev) device_bml3bus_card_interface::static_set_bml3bus_tag(*dev, m_bml3bus_tag, m_bml3bus_slottag);
+}
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+const device_type BML3BUS = &device_creator<bml3bus_device>;
+
+void bml3bus_device::static_set_cputag(device_t &device, const char *tag)
+{
+ bml3bus_device &bml3bus = downcast<bml3bus_device &>(device);
+ bml3bus.m_cputag = tag;
+}
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// bml3bus_device - constructor
+//-------------------------------------------------
+
+bml3bus_device::bml3bus_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, BML3BUS, "Hitachi MB-6890 Bus", tag, owner, clock, "bml3bus", __FILE__),
+ m_out_nmi_cb(*this),
+ m_out_irq_cb(*this),
+ m_out_firq_cb(*this)
+{
+}
+
+bml3bus_device::bml3bus_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),
+ m_out_nmi_cb(*this),
+ m_out_irq_cb(*this),
+ m_out_firq_cb(*this)
+{
+}
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void bml3bus_device::device_start()
+{
+ m_maincpu = machine().device<cpu_device>(m_cputag);
+
+ // resolve callbacks
+ m_out_nmi_cb.resolve_safe();
+ m_out_irq_cb.resolve_safe();
+ m_out_firq_cb.resolve_safe();
+
+ // clear slots
+ for (int i = 0; i < BML3BUS_MAX_SLOTS; i++)
+ {
+ m_device_list[i] = NULL;
+ }
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void bml3bus_device::device_reset()
+{
+}
+
+device_bml3bus_card_interface *bml3bus_device::get_bml3bus_card(int slot)
+{
+ if (slot < 0)
+ {
+ return NULL;
+ }
+
+ return m_device_list[slot];
+}
+
+void bml3bus_device::add_bml3bus_card(int slot, device_bml3bus_card_interface *card)
+{
+ m_device_list[slot] = card;
+}
+
+void bml3bus_device::set_nmi_line(int state)
+{
+ m_out_nmi_cb(state);
+}
+
+void bml3bus_device::set_irq_line(int state)
+{
+ m_out_irq_cb(state);
+}
+
+void bml3bus_device::set_firq_line(int state)
+{
+ m_out_firq_cb(state);
+}
+
+// interrupt request from bml3bus card
+WRITE_LINE_MEMBER( bml3bus_device::nmi_w ) { m_out_nmi_cb(state); }
+WRITE_LINE_MEMBER( bml3bus_device::irq_w ) { m_out_irq_cb(state); }
+WRITE_LINE_MEMBER( bml3bus_device::firq_w ) { m_out_firq_cb(state); }
+
+//**************************************************************************
+// DEVICE CONFIG BML3BUS CARD INTERFACE
+//**************************************************************************
+
+
+//**************************************************************************
+// DEVICE BML3BUS CARD INTERFACE
+//**************************************************************************
+
+//-------------------------------------------------
+// device_bml3bus_card_interface - constructor
+//-------------------------------------------------
+
+device_bml3bus_card_interface::device_bml3bus_card_interface(const machine_config &mconfig, device_t &device)
+ : device_slot_card_interface(mconfig, device),
+ m_bml3bus(NULL),
+ m_bml3bus_tag(NULL)
+{
+}
+
+
+//-------------------------------------------------
+// ~device_bml3bus_card_interface - destructor
+//-------------------------------------------------
+
+device_bml3bus_card_interface::~device_bml3bus_card_interface()
+{
+}
+
+void device_bml3bus_card_interface::static_set_bml3bus_tag(device_t &device, const char *tag, const char *slottag)
+{
+ device_bml3bus_card_interface &bml3bus_card = dynamic_cast<device_bml3bus_card_interface &>(device);
+ bml3bus_card.m_bml3bus_tag = tag;
+ bml3bus_card.m_bml3bus_slottag = slottag;
+}
+
+void device_bml3bus_card_interface::set_bml3bus_device()
+{
+ // extract the slot number from the last digit of the slot tag
+ int tlen = strlen(m_bml3bus_slottag);
+
+ m_slot = (m_bml3bus_slottag[tlen-1] - '1');
+
+ if (m_slot < 0 || m_slot >= BML3BUS_MAX_SLOTS)
+ {
+ fatalerror("Slot %x out of range for Hitachi MB-6890 Bus\n", m_slot);
+ }
+
+ m_bml3bus = dynamic_cast<bml3bus_device *>(device().machine().device(m_bml3bus_tag));
+ m_bml3bus->add_bml3bus_card(m_slot, this);
+}