diff options
Diffstat (limited to 'src/devices/bus/bml3/bml3bus.c')
-rw-r--r-- | src/devices/bus/bml3/bml3bus.c | 241 |
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 @@ -0,0 +1,241 @@ +// 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); +} |