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tiki100: Added BUSRQ, BUSAK, and EXIN to the expansion bus. [Curt Coder]

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This commit is contained in:
Curt Coder 2015-10-16 23:44:37 +03:00
parent 8273b50e5a
commit 9f91d26cec
5 changed files with 65 additions and 5 deletions
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6
src/devices/bus/tiki100/8088.c
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@ -49,6 +49,8 @@ const rom_entry *tiki100_8088_t::device_rom_region() const
static ADDRESS_MAP_START( i8088_mem, AS_PROGRAM, 8, tiki100_8088_t )
AM_RANGE(0x00000, 0xbffff) AM_RAM
AM_RANGE(0xc0000, 0xcffff) AM_DEVREADWRITE(":" TIKI100_BUS_TAG, tiki100_bus_t, exin_mrq_r, exin_mrq_w)
AM_RANGE(0xff000, 0xfffff) AM_ROM AM_REGION(I8088_TAG, 0)
ADDRESS_MAP_END
@ -158,7 +160,7 @@ void tiki100_8088_t::iorq_w(address_space &space, offs_t offset, UINT8 data)
READ8_MEMBER( tiki100_8088_t::read )
{
return m_data;
return m_busak << 4 | m_data;
}
@ -169,4 +171,6 @@ READ8_MEMBER( tiki100_8088_t::read )
WRITE8_MEMBER( tiki100_8088_t::write )
{
m_data = data & 0x0f;
m_bus->busrq_w(BIT(data, 4));
}

27
src/devices/bus/tiki100/exp.c
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@ -57,7 +57,10 @@ void tiki100_bus_slot_t::device_start()
tiki100_bus_t::tiki100_bus_t(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
device_t(mconfig, TIKI100_BUS, "TIKI-100 expansion bus", tag, owner, clock, "tiki100bus", __FILE__),
m_irq_cb(*this),
m_nmi_cb(*this)
m_nmi_cb(*this),
m_busrq_cb(*this),
m_in_mrq_cb(*this),
m_out_mrq_cb(*this)
{
}
@ -71,6 +74,9 @@ void tiki100_bus_t::device_start()
// resolve callbacks
m_irq_cb.resolve_safe();
m_nmi_cb.resolve_safe();
m_busrq_cb.resolve_safe();
m_in_mrq_cb.resolve();
m_out_mrq_cb.resolve();
}
@ -154,6 +160,22 @@ WRITE8_MEMBER( tiki100_bus_t::iorq_w )
}
//-------------------------------------------------
// busak_w - bus acknowledge write
//-------------------------------------------------
WRITE_LINE_MEMBER( tiki100_bus_t::busak_w )
{
device_tiki100bus_card_interface *entry = m_device_list.first();
while (entry)
{
entry->busak_w(state);
entry = entry->next();
}
}
//**************************************************************************
// DEVICE TIKI-100 BUS CARD INTERFACE
@ -164,7 +186,8 @@ WRITE8_MEMBER( tiki100_bus_t::iorq_w )
//-------------------------------------------------
device_tiki100bus_card_interface::device_tiki100bus_card_interface(const machine_config &mconfig, device_t &device) :
device_slot_card_interface(mconfig, device)
device_slot_card_interface(mconfig, device),
m_busak(CLEAR_LINE)
{
m_slot = dynamic_cast<tiki100_bus_slot_t *>(device.owner());
}

23
src/devices/bus/tiki100/exp.h
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@ -45,6 +45,15 @@
#define MCFG_TIKI100_BUS_NMI_CALLBACK(_write) \
devcb = &tiki100_bus_t::set_nmi_wr_callback(*device, DEVCB_##_write);
#define MCFG_TIKI100_BUS_BUSRQ_CALLBACK(_write) \
devcb = &tiki100_bus_t::set_busrq_wr_callback(*device, DEVCB_##_write);
#define MCFG_TIKI100_BUS_IN_MREQ_CALLBACK(_read) \
devcb = &tiki100_bus_t::set_mrq_rd_callback(*device, DEVCB_##_read);
#define MCFG_TIKI100_BUS_OUT_MREQ_CALLBACK(_write) \
devcb = &tiki100_bus_t::set_mrq_wr_callback(*device, DEVCB_##_write);
//**************************************************************************
@ -78,6 +87,8 @@ public:
virtual UINT8 iorq_r(address_space &space, offs_t offset, UINT8 data) { return data; };
virtual void iorq_w(address_space &space, offs_t offset, UINT8 data) { };
virtual void busak_w(int state) { m_busak = state; };
// Z80 daisy chain
virtual int z80daisy_irq_state() { return 0; }
virtual int z80daisy_irq_ack() { return 0; }
@ -85,6 +96,7 @@ public:
tiki100_bus_t *m_bus;
tiki100_bus_slot_t *m_slot;
int m_busak;
device_tiki100bus_card_interface *m_next;
};
@ -131,6 +143,9 @@ public:
template<class _Object> static devcb_base &set_irq_wr_callback(device_t &device, _Object object) { return downcast<tiki100_bus_t &>(device).m_irq_cb.set_callback(object); }
template<class _Object> static devcb_base &set_nmi_wr_callback(device_t &device, _Object object) { return downcast<tiki100_bus_t &>(device).m_nmi_cb.set_callback(object); }
template<class _Object> static devcb_base &set_busrq_wr_callback(device_t &device, _Object object) { return downcast<tiki100_bus_t &>(device).m_busrq_cb.set_callback(object); }
template<class _Object> static devcb_base &set_mrq_rd_callback(device_t &device, _Object object) { return downcast<tiki100_bus_t &>(device).m_in_mrq_cb.set_callback(object); }
template<class _Object> static devcb_base &set_mrq_wr_callback(device_t &device, _Object object) { return downcast<tiki100_bus_t &>(device).m_out_mrq_cb.set_callback(object); }
void add_card(device_tiki100bus_card_interface *card);
@ -141,9 +156,14 @@ public:
UINT8 iorq_r(address_space &space, offs_t offset, UINT8 data);
DECLARE_WRITE8_MEMBER( iorq_w );
DECLARE_WRITE_LINE_MEMBER( busak_w );
// peripheral interface
DECLARE_WRITE_LINE_MEMBER( irq_w ) { m_irq_cb(state); }
DECLARE_WRITE_LINE_MEMBER( nmi_w ) { m_nmi_cb(state); }
DECLARE_WRITE_LINE_MEMBER( busrq_w ) { m_busrq_cb(state); }
DECLARE_READ8_MEMBER( exin_mrq_r ) { return m_in_mrq_cb(offset); }
DECLARE_WRITE8_MEMBER( exin_mrq_w ) { m_out_mrq_cb(offset, data); }
protected:
// device-level overrides
@ -152,6 +172,9 @@ protected:
private:
devcb_write_line m_irq_cb;
devcb_write_line m_nmi_cb;
devcb_write_line m_busrq_cb;
devcb_read8 m_in_mrq_cb;
devcb_write8 m_out_mrq_cb;
simple_list<device_tiki100bus_card_interface> m_device_list;
};

12
src/mame/drivers/tiki100.c
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@ -657,13 +657,18 @@ static const z80_daisy_config tiki100_daisy_chain[] =
{ NULL }
};
TIMER_DEVICE_CALLBACK_MEMBER( tiki100_state::tape_tick )
{
m_pio->port_b_write((m_cassette->input() > 0.0) << 7);
}
WRITE_LINE_MEMBER( tiki100_state::busrq_w )
{
// since our Z80 has no support for BUSACK, we assume it is granted immediately
m_maincpu->set_input_line(Z80_INPUT_LINE_BUSRQ, state);
m_exp->busak_w(state);
}
/* Machine Start */
void tiki100_state::machine_start()
@ -711,6 +716,9 @@ static MACHINE_CONFIG_START( tiki100, tiki100_state )
MCFG_TIKI100_BUS_ADD()
MCFG_TIKI100_BUS_IRQ_CALLBACK(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0))
MCFG_TIKI100_BUS_NMI_CALLBACK(INPUTLINE(Z80_TAG, INPUT_LINE_NMI))
MCFG_TIKI100_BUS_BUSRQ_CALLBACK(WRITELINE(tiki100_state, busrq_w))
MCFG_TIKI100_BUS_IN_MREQ_CALLBACK(READ8(tiki100_state, mrq_r))
MCFG_TIKI100_BUS_OUT_MREQ_CALLBACK(WRITE8(tiki100_state, mrq_w))
MCFG_TIKI100_BUS_SLOT_ADD("slot1", "8088")
MCFG_TIKI100_BUS_SLOT_ADD("slot2", "hdc")
MCFG_TIKI100_BUS_SLOT_ADD("slot3", NULL)

2
src/mame/includes/tiki100.h
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@ -138,6 +138,8 @@ public:
DECLARE_WRITE_LINE_MEMBER(write_centronics_busy);
DECLARE_WRITE_LINE_MEMBER(write_centronics_perror);
DECLARE_WRITE_LINE_MEMBER( busrq_w );
enum
{
ROM0 = 0x01,