diff options
Diffstat (limited to 'src/mame/drivers/cit220.cpp')
-rw-r--r-- | src/mame/drivers/cit220.cpp | 33 |
1 files changed, 29 insertions, 4 deletions
diff --git a/src/mame/drivers/cit220.cpp b/src/mame/drivers/cit220.cpp index 4888dfd671f..7f5c69b75c5 100644 --- a/src/mame/drivers/cit220.cpp +++ b/src/mame/drivers/cit220.cpp @@ -43,6 +43,7 @@ private: virtual void machine_start() override; DECLARE_WRITE_LINE_MEMBER(sod_w); + DECLARE_WRITE_LINE_MEMBER(cols_w); SCN2674_DRAW_CHARACTER_MEMBER(draw_character); void cit220p_mem_map(address_map &map); @@ -58,12 +59,17 @@ private: required_device<screen_device> m_screen; required_device<scn2674_device> m_avdc; required_region_ptr<u8> m_chargen; + + bool m_132_cols; }; void cit220_state::machine_start() { subdevice<i8251_device>("usart")->write_cts(0); + + m_132_cols = false; + save_item(NAME(m_132_cols)); } @@ -72,6 +78,16 @@ WRITE_LINE_MEMBER(cit220_state::sod_w) // probably asserts PBREQ on SCN2674 to access memory at Exxx } +WRITE_LINE_MEMBER(cit220_state::cols_w) +{ + if (!state != m_132_cols) + { + m_132_cols = !state; + m_avdc->set_character_width(m_132_cols ? 9 : 10); + m_avdc->set_unscaled_clock(m_132_cols ? 22'096'000 / 9 : 14'916'000 / 10); + } +} + void cit220_state::cit220p_mem_map(address_map &map) { map(0x0000, 0x7fff).rom().region("maincpu", 0); @@ -109,6 +125,14 @@ void cit220_state::vp122_io_map(address_map &map) SCN2674_DRAW_CHARACTER_MEMBER(cit220_state::draw_character) { + u16 dots = m_chargen[charcode << 4 | linecount] << 2; + const int width = m_132_cols ? 9 : 10; + + for (int i = 0; i < width; i++) + { + bitmap.pix32(y, x++) = BIT(dots, 9) ? rgb_t::white() : rgb_t::black(); + dots <<= 1; + } } void cit220_state::char_map(address_map &map) @@ -149,7 +173,7 @@ void cit220_state::cit220p(machine_config &config) SCN2674(config, m_avdc, 22'096'000 / 9); m_avdc->intr_callback().set_inputline(m_maincpu, I8085_RST65_LINE); - m_avdc->set_character_width(9); // 10 in 80-column mode + m_avdc->set_character_width(9); // 10 in 80-column modes m_avdc->set_display_callback(FUNC(cit220_state::draw_character)); m_avdc->set_addrmap(0, &cit220_state::char_map); m_avdc->set_addrmap(1, &cit220_state::attr_map); @@ -159,6 +183,7 @@ void cit220_state::cit220p(machine_config &config) duart.irq_cb().set_inputline("maincpu", I8085_RST55_LINE); duart.outport_cb().set("usart", FUNC(i8251_device::write_txc)).bit(3); // 9600 baud? duart.outport_cb().append("usart", FUNC(i8251_device::write_rxc)).bit(3); + duart.outport_cb().append(FUNC(cit220_state::cols_w)).bit(7); I8251(config, "usart", 4'000'000); @@ -192,7 +217,7 @@ void cit220_state::vp122(machine_config &config) duart.irq_cb().set_inputline("maincpu", I8085_RST55_LINE); duart.outport_cb().set("usart", FUNC(i8251_device::write_txc)).bit(3); duart.outport_cb().append("usart", FUNC(i8251_device::write_rxc)).bit(3); - // OP7 = 0 for 80-column modes, 1 for 132-column modes + duart.outport_cb().append(FUNC(cit220_state::cols_w)).bit(7); I8251(config, "usart", 8_MHz_XTAL / 2); @@ -234,5 +259,5 @@ ROM_START( vp122 ) ROM_LOAD( "223-48700.uk4", 0x0000, 0x2000, CRC(4dbab4bd) SHA1(18e9a23ba22e2096fa529541fa329f5a56740e62) ) ROM_END -COMP( 1984, cit220p, 0, 0, cit220p, cit220p, cit220_state, empty_init, "C. Itoh Electronics", "CIT-220+ Video Terminal", MACHINE_IS_SKELETON ) -COMP( 1985, vp122, 0, 0, vp122, cit220p, cit220_state, empty_init, "ADDS", "Viewpoint 122", MACHINE_IS_SKELETON ) +COMP(1984, cit220p, 0, 0, cit220p, cit220p, cit220_state, empty_init, "C. Itoh Electronics", "CIT-220+ Video Terminal", MACHINE_NOT_WORKING | MACHINE_IMPERFECT_GRAPHICS | MACHINE_NO_SOUND) +COMP(1985, vp122, 0, 0, vp122, cit220p, cit220_state, empty_init, "ADDS", "Viewpoint 122", MACHINE_NOT_WORKING | MACHINE_IMPERFECT_GRAPHICS | MACHINE_NO_SOUND) |