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hp9k_3xx: use buserror workaround from hp_ipc (nw) (#4101)

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dxl 2018-10-10 19:39:50 +02:00 committed by R. Belmont
parent 27785e51ef
commit f53647bf3a
1 changed files with 37 additions and 22 deletions
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59
src/mame/drivers/hp9k_3xx.cpp
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@ -92,6 +92,7 @@ private:
required_device<m68000_base_device> m_maincpu;
virtual void machine_reset() override;
virtual void machine_start() override;
virtual void driver_start() override;
optional_shared_ptr<uint16_t> m_vram16;
@ -101,6 +102,9 @@ private:
uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
uint32_t hp_medres_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
void set_bus_error(uint32_t address, bool write, uint16_t mem_mask);
DECLARE_READ16_MEMBER(buserror16_r);
DECLARE_WRITE16_MEMBER(buserror16_w);
DECLARE_READ32_MEMBER(buserror_r);
@ -128,7 +132,8 @@ private:
DECLARE_WRITE_LINE_MEMBER(dio_irq6_w) { m_maincpu->set_input_line_and_vector(M68K_IRQ_6, state, M68K_INT_ACK_AUTOVECTOR); };
DECLARE_WRITE_LINE_MEMBER(dio_irq7_w) { m_maincpu->set_input_line_and_vector(M68K_IRQ_7, state, M68K_INT_ACK_AUTOVECTOR); };
uint32_t m_lastpc;
bool m_bus_error;
emu_timer *m_bus_error_timer;
};
uint32_t hp9k3xx_state::hp_medres_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
@ -262,6 +267,17 @@ void hp9k3xx_state::machine_reset()
m_maincpu->set_reset_callback(write_line_delegate(FUNC(bus::hp_dio::dio16_device::reset_in), dio));
}
void hp9k3xx_state::machine_start()
{
m_bus_error_timer = timer_alloc(0);
m_maincpu->set_reset_callback(write_line_delegate(FUNC(hp9k3xx_state::cpu_reset), this));
}
void hp9k3xx_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
m_bus_error = false;
}
WRITE16_MEMBER(hp9k3xx_state::led_w)
{
if (!(mem_mask & 0xff))
@ -307,42 +323,41 @@ void hp9k3xx_state::add_dio32_bus(machine_config &config)
dio32.irq7_out_cb().set(FUNC(hp9k3xx_state::dio_irq7_w));
}
void hp9k3xx_state::set_bus_error(uint32_t address, bool write, uint16_t mem_mask)
{
if (m_bus_error)
return;
m_bus_error = true;
m_maincpu->set_buserror_details(address, write, m_maincpu->get_fc());
m_maincpu->set_input_line(M68K_LINE_BUSERROR, ASSERT_LINE);
m_bus_error_timer->adjust(m_maincpu->cycles_to_attotime(16)); // let rmw cycles complete
}
READ16_MEMBER(hp9k3xx_state::buserror16_r)
{
m_maincpu->set_input_line(M68K_LINE_BUSERROR, ASSERT_LINE);
m_maincpu->set_input_line(M68K_LINE_BUSERROR, CLEAR_LINE);
m_lastpc = m_maincpu->pc();
return 0;
if (!machine().side_effects_disabled())
set_bus_error((offset << 1) & 0xFFFFFF, false, mem_mask);
return 0xffff;
}
WRITE16_MEMBER(hp9k3xx_state::buserror16_w)
{
if (m_lastpc == m_maincpu->pc()) {
logerror("%s: ignoring r-m-w double bus error\n", __FUNCTION__);
return;
}
m_maincpu->set_input_line(M68K_LINE_BUSERROR, ASSERT_LINE);
m_maincpu->set_input_line(M68K_LINE_BUSERROR, CLEAR_LINE);
if (!machine().side_effects_disabled())
set_bus_error((offset << 1) & 0xFFFFFF, true, mem_mask);
}
READ32_MEMBER(hp9k3xx_state::buserror_r)
{
m_maincpu->set_input_line(M68K_LINE_BUSERROR, ASSERT_LINE);
m_maincpu->set_input_line(M68K_LINE_BUSERROR, CLEAR_LINE);
m_lastpc = m_maincpu->pc();
return 0;
if (!machine().side_effects_disabled())
set_bus_error(offset << 2, false, mem_mask);
return 0xffffffff;
}
WRITE32_MEMBER(hp9k3xx_state::buserror_w)
{
if (m_lastpc == m_maincpu->pc()) {
logerror("%s: ignoring r-m-w double bus error\n", __FUNCTION__);
return;
}
m_maincpu->set_input_line(M68K_LINE_BUSERROR, ASSERT_LINE);
m_maincpu->set_input_line(M68K_LINE_BUSERROR, CLEAR_LINE);
if (!machine().side_effects_disabled())
set_bus_error(offset << 2, false, mem_mask);
}
MACHINE_CONFIG_START(hp9k3xx_state::hp9k300)