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mt5510: Add ROM banking

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This commit is contained in:
AJR 2021-07-08 18:04:40 -04:00
parent 691c519086
commit 911f056a93
1 changed files with 30 additions and 4 deletions
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34
src/mame/drivers/mt5510.cpp
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@ -2,7 +2,7 @@
// copyright-holders:AJR
/***********************************************************************************************************************************
Skeleton driver for Micro-Term Model 5510 terminal.
Skeleton driver for Microterm Model 5510 terminal.
************************************************************************************************************************************/
@ -20,36 +20,62 @@ public:
mt5510_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_rombank(*this, "rombank")
{
}
void mt5510(machine_config &config);
protected:
virtual void machine_start() override;
virtual void machine_reset() override;
private:
u32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
void bank_w(u8 data);
void mem_map(address_map &map);
void io_map(address_map &map);
required_device<cpu_device> m_maincpu;
required_memory_bank m_rombank;
};
void mt5510_state::machine_start()
{
m_rombank->configure_entries(0, 4, memregion("maincpu")->base() + 0x8000, 0x2000);
}
void mt5510_state::machine_reset()
{
m_rombank->set_entry(0);
}
u32 mt5510_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
return 0;
}
void mt5510_state::bank_w(u8 data)
{
m_rombank->set_entry(BIT(data, 2, 2));
}
void mt5510_state::mem_map(address_map &map)
{
map(0x0000, 0x7fff).rom().region("maincpu", 0).nopw();
map(0x8000, 0xbfff).ram();
map(0xc000, 0xffff).ram();
map(0x8000, 0x9fff).bankr("rombank");
map(0xa000, 0xbfff).ram();
map(0xc000, 0xdfff).ram().share("charram");
map(0xe000, 0xffff).ram().share("attrram");
}
void mt5510_state::io_map(address_map &map)
{
map.global_mask(0xff);
map(0x60, 0x6f).rw("duart", FUNC(scn2681_device::read), FUNC(scn2681_device::write));
map(0x71, 0x71).w(FUNC(mt5510_state::bank_w));
}
static INPUT_PORTS_START(mt5510)
@ -95,4 +121,4 @@ ROM_END
} // anonymous namespace
COMP(1988, mt5510, 0, 0, mt5510, mt5510, mt5510_state, empty_init, "Micro-Term", "Micro-Term 5510", MACHINE_IS_SKELETON)
COMP(1988, mt5510, 0, 0, mt5510, mt5510, mt5510_state, empty_init, "Microterm", "Microterm 5510", MACHINE_IS_SKELETON)