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cit220p: Add AVDC latch access and attribute RAM (nw)

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This commit is contained in:
AJR 2018-07-14 23:06:23 -04:00
parent adae0fea58
commit 5ac830087a
1 changed files with 16 additions and 8 deletions
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24
src/mame/drivers/cit220.cpp
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@ -27,14 +27,16 @@ public:
//, m_p_chargen(*this, "chargen")
{ }
void cit220p(machine_config &config);
private:
DECLARE_WRITE_LINE_MEMBER(sod_w);
SCN2674_DRAW_CHARACTER_MEMBER(draw_character);
void cit220p(machine_config &config);
void io_map(address_map &map);
void mem_map(address_map &map);
void vram_map(address_map &map);
private:
void char_map(address_map &map);
void attr_map(address_map &map);
required_device<cpu_device> m_maincpu;
required_device<screen_device> m_screen;
//required_region_ptr<u8> m_p_chargen;
@ -60,8 +62,8 @@ void cit220_state::io_map(address_map &map)
map(0x10, 0x10).rw("usart", FUNC(i8251_device::data_r), FUNC(i8251_device::data_w));
map(0x11, 0x11).rw("usart", FUNC(i8251_device::status_r), FUNC(i8251_device::control_w));
map(0x20, 0x27).rw("avdc", FUNC(scn2674_device::read), FUNC(scn2674_device::write));
map(0xa0, 0xa0).unmaprw(); // ???
map(0xc0, 0xc0).unmaprw(); // ???
map(0xa0, 0xa0).rw("avdc", FUNC(scn2674_device::attr_buffer_r), FUNC(scn2674_device::attr_buffer_w));
map(0xc0, 0xc0).rw("avdc", FUNC(scn2674_device::buffer_r), FUNC(scn2674_device::buffer_w));
}
@ -69,9 +71,14 @@ SCN2674_DRAW_CHARACTER_MEMBER(cit220_state::draw_character)
{
}
void cit220_state::vram_map(address_map &map)
void cit220_state::char_map(address_map &map)
{
map(0x0000, 0x27ff).noprw();
map(0x0000, 0x2fff).ram();
}
void cit220_state::attr_map(address_map &map)
{
map(0x0000, 0x2fff).ram();
}
@ -93,7 +100,8 @@ MACHINE_CONFIG_START(cit220_state::cit220p)
MCFG_SCN2674_INTR_CALLBACK(INPUTLINE("maincpu", I8085_RST65_LINE))
MCFG_SCN2674_CHARACTER_WIDTH(10)
MCFG_SCN2674_DRAW_CHARACTER_CALLBACK_OWNER(cit220_state, draw_character)
MCFG_DEVICE_ADDRESS_MAP(0, vram_map)
MCFG_DEVICE_ADDRESS_MAP(0, char_map)
MCFG_DEVICE_ADDRESS_MAP(1, attr_map)
MCFG_VIDEO_SET_SCREEN("screen")
MCFG_DEVICE_ADD("duart", SCN2681, 3686400)