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Merge pull request #3462 from sschnelle/hp9k_3xx_basic_boots

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hp9k_3xx: workaround double exception during r-m-w operations
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R. Belmont 2018-04-16 17:00:02 -04:00 committed by GitHub
commit d209d2460e
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1 changed files with 18 additions and 28 deletions
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46
src/mame/drivers/hp9k_3xx.cpp
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@ -154,10 +154,10 @@ public:
void hp9k3xx_common(address_map &map);
void iocpu_map(address_map &map);
private:
bool m_in_buserr;
bool m_hil_read;
uint8_t m_hil_data;
uint8_t m_latch_data;
uint32_t m_lastpc;
};
uint32_t hp9k3xx_state::hp_medres_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
@ -294,53 +294,43 @@ INPUT_PORTS_END
void hp9k3xx_state::machine_reset()
{
m_in_buserr = false;
}
READ16_MEMBER(hp9k3xx_state::buserror16_r)
{
if (!m_in_buserr)
{
m_in_buserr = true;
m_maincpu->set_input_line(M68K_LINE_BUSERROR, ASSERT_LINE);
m_maincpu->set_input_line(M68K_LINE_BUSERROR, CLEAR_LINE);
m_in_buserr = false;
}
m_maincpu->set_input_line(M68K_LINE_BUSERROR, ASSERT_LINE);
m_maincpu->set_input_line(M68K_LINE_BUSERROR, CLEAR_LINE);
m_lastpc = machine().device<cpu_device>("maincpu")->pc();
return 0;
}
WRITE16_MEMBER(hp9k3xx_state::buserror16_w)
{
if (!m_in_buserr)
{
m_in_buserr = true;
m_maincpu->set_input_line(M68K_LINE_BUSERROR, ASSERT_LINE);
m_maincpu->set_input_line(M68K_LINE_BUSERROR, CLEAR_LINE);
m_in_buserr = false;
if (m_lastpc == machine().device<cpu_device>("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);
}
READ32_MEMBER(hp9k3xx_state::buserror_r)
{
if (!m_in_buserr)
{
m_in_buserr = true;
m_maincpu->set_input_line(M68K_LINE_BUSERROR, ASSERT_LINE);
m_maincpu->set_input_line(M68K_LINE_BUSERROR, CLEAR_LINE);
m_in_buserr = false;
}
m_maincpu->set_input_line(M68K_LINE_BUSERROR, ASSERT_LINE);
m_maincpu->set_input_line(M68K_LINE_BUSERROR, CLEAR_LINE);
m_lastpc = machine().device<cpu_device>("maincpu")->pc();
return 0;
}
WRITE32_MEMBER(hp9k3xx_state::buserror_w)
{
if (!m_in_buserr)
{
m_in_buserr = true;
m_maincpu->set_input_line(M68K_LINE_BUSERROR, ASSERT_LINE);
m_maincpu->set_input_line(M68K_LINE_BUSERROR, CLEAR_LINE);
m_in_buserr = false;
if (m_lastpc == machine().device<cpu_device>("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);
}
WRITE8_MEMBER(hp9k3xx_state::iocpu_port1_w)