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d461: NOVRAM stuff (nw)

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This commit is contained in:
AJR 2018-06-11 20:35:05 -04:00
parent 3a46a189a3
commit 07b70fec34
1 changed files with 30 additions and 2 deletions
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32
src/mame/drivers/d400.cpp
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@ -19,14 +19,19 @@ public:
d400_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_novram(*this, "novram")
{ }
void d461(machine_config &config);
private:
u32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
void d461(machine_config &config);
DECLARE_READ8_MEMBER(novram_recall_r);
DECLARE_READ8_MEMBER(novram_store_r);
void mem_map(address_map &map);
private:
required_device<cpu_device> m_maincpu;
required_device<x2210_device> m_novram;
};
u32 d400_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
@ -34,6 +39,26 @@ u32 d400_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const
return 0;
}
READ8_MEMBER(d400_state::novram_recall_r)
{
if (!machine().side_effects_disabled())
{
m_novram->recall(1);
m_novram->recall(0);
}
return 0xff;
}
READ8_MEMBER(d400_state::novram_store_r)
{
if (!machine().side_effects_disabled())
{
m_novram->store(1);
m_novram->store(0);
}
return 0xff;
}
void d400_state::mem_map(address_map &map)
{
map(0x0000, 0x3fff).ram();
@ -43,6 +68,8 @@ void d400_state::mem_map(address_map &map)
map(0x6000, 0x6fff).ram();
map(0x7800, 0x780f).rw("duart", FUNC(scn2681_device::read), FUNC(scn2681_device::write));
map(0x7880, 0x78bf).rw("novram", FUNC(x2210_device::read), FUNC(x2210_device::write));
map(0x7900, 0x7900).r(FUNC(d400_state::novram_recall_r));
map(0x7980, 0x7980).r(FUNC(d400_state::novram_store_r));
map(0x7c00, 0x7c00).nopw();
map(0x8000, 0xffff).rom().region("maincpu", 0);
}
@ -62,6 +89,7 @@ MACHINE_CONFIG_START(d400_state::d461)
MCFG_DEVICE_ADD("novram", X2210, 0)
MCFG_DEVICE_ADD("duart", SCN2681, XTAL(3'686'400))
MCFG_MC68681_IRQ_CALLBACK(INPUTLINE("maincpu", M6809_FIRQ_LINE))
MACHINE_CONFIG_END