diff options
Diffstat (limited to 'src/mame/drivers/cit220.cpp')
-rw-r--r-- | src/mame/drivers/cit220.cpp | 133 |
1 files changed, 109 insertions, 24 deletions
diff --git a/src/mame/drivers/cit220.cpp b/src/mame/drivers/cit220.cpp index 17ce79680d7..42d1d7fd4f8 100644 --- a/src/mame/drivers/cit220.cpp +++ b/src/mame/drivers/cit220.cpp @@ -1,19 +1,26 @@ // license:BSD-3-Clause -// copyright-holders: +// copyright-holders:AJR /*********************************************************************************************************************************** -Skeleton driver for VT220-compatible terminals by C. Itoh/CIE Terminals. +Skeleton driver for VT220-compatible terminals by C. Itoh/CIE Terminals and similar terminals by ADDS. The CIT-220+ Video Terminal was introduced as a direct competitor to DEC's VT220. It copied the design of the VT220 closely enough to provoke a lawsuit, which led to its eventual withdrawal in favor of its successor, the CIT224. +"COPYRIGHT MICROWEST 1984" can be found in the program ROMs of both the CIT-220+ and Viewpoint 122. The code is clearly similar, +and the SCN2674 video timing parameters appear to be identical. + ************************************************************************************************************************************/ #include "emu.h" +//#include "bus/rs232/rs232.h" #include "cpu/i8085/i8085.h" #include "cpu/mcs48/mcs48.h" +//#include "machine/eeprompar.h" #include "machine/i8251.h" #include "machine/mc68681.h" +#include "machine/nvram.h" +#include "machine/pit8253.h" #include "video/scn2674.h" #include "screen.h" @@ -25,18 +32,23 @@ public: : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_screen(*this, "screen") - //, m_p_chargen(*this, "chargen") + , m_avdc(*this, "avdc") + , m_chargen(*this, "chargen") { } void cit220p(machine_config &config); + void vp122(machine_config &config); + private: virtual void machine_start() override; DECLARE_WRITE_LINE_MEMBER(sod_w); SCN2674_DRAW_CHARACTER_MEMBER(draw_character); - void io_map(address_map &map); - void mem_map(address_map &map); + void cit220p_mem_map(address_map &map); + void cit220p_io_map(address_map &map); + void vp122_mem_map(address_map &map); + void vp122_io_map(address_map &map); void char_map(address_map &map); void attr_map(address_map &map); void keyboard_map(address_map &map); @@ -44,7 +56,8 @@ private: required_device<i8085a_cpu_device> m_maincpu; required_device<screen_device> m_screen; - //required_region_ptr<u8> m_p_chargen; + required_device<scn2674_device> m_avdc; + required_region_ptr<u8> m_chargen; }; @@ -59,7 +72,7 @@ WRITE_LINE_MEMBER(cit220_state::sod_w) // probably asserts PBREQ on SCN2674 to access memory at Exxx } -void cit220_state::mem_map(address_map &map) +void cit220_state::cit220p_mem_map(address_map &map) { map(0x0000, 0x7fff).rom().region("maincpu", 0); map(0x8000, 0x87ff).ram(); @@ -67,13 +80,30 @@ void cit220_state::mem_map(address_map &map) map(0xe000, 0xe7ff).ram(); // ??? } -void cit220_state::io_map(address_map &map) +void cit220_state::cit220p_io_map(address_map &map) { map(0x00, 0x0f).rw("duart", FUNC(scn2681_device::read), FUNC(scn2681_device::write)); map(0x10, 0x11).rw("usart", FUNC(i8251_device::read), FUNC(i8251_device::write)); - map(0x20, 0x27).rw("avdc", FUNC(scn2674_device::read), FUNC(scn2674_device::write)); - 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)); + map(0x20, 0x27).rw(m_avdc, FUNC(scn2674_device::read), FUNC(scn2674_device::write)); + map(0xa0, 0xa0).rw(m_avdc, FUNC(scn2674_device::attr_buffer_r), FUNC(scn2674_device::attr_buffer_w)); + map(0xc0, 0xc0).rw(m_avdc, FUNC(scn2674_device::buffer_r), FUNC(scn2674_device::buffer_w)); +} + +void cit220_state::vp122_mem_map(address_map &map) +{ + map(0x0000, 0x9fff).rom().region("maincpu", 0); + map(0xa000, 0xa7ff).ram().share("nvram"); + map(0xe000, 0xe7ff).noprw(); +} + +void cit220_state::vp122_io_map(address_map &map) +{ + map(0x00, 0x07).rw(m_avdc, FUNC(scn2674_device::read), FUNC(scn2674_device::write)); + map(0x10, 0x1f).rw("duart", FUNC(scn2681_device::read), FUNC(scn2681_device::write)); + map(0x20, 0x21).rw("usart", FUNC(i8251_device::read), FUNC(i8251_device::write)); + map(0x50, 0x50).rw(m_avdc, FUNC(scn2674_device::buffer_r), FUNC(scn2674_device::buffer_w)); + map(0x60, 0x60).rw(m_avdc, FUNC(scn2674_device::attr_buffer_r), FUNC(scn2674_device::attr_buffer_w)); + map(0x70, 0x73).w("pit", FUNC(pit8253_device::write)); } @@ -107,35 +137,71 @@ INPUT_PORTS_END void cit220_state::cit220p(machine_config &config) { - I8085A(config, m_maincpu, 6000000); - m_maincpu->set_addrmap(AS_PROGRAM, &cit220_state::mem_map); - m_maincpu->set_addrmap(AS_IO, &cit220_state::io_map); + I8085A(config, m_maincpu, 8'000'000); + m_maincpu->set_addrmap(AS_PROGRAM, &cit220_state::cit220p_mem_map); + m_maincpu->set_addrmap(AS_IO, &cit220_state::cit220p_io_map); m_maincpu->out_sod_func().set(FUNC(cit220_state::sod_w)); SCREEN(config, m_screen, SCREEN_TYPE_RASTER); + //m_screen->set_raw(14'916'000, 960, 0, 800, 259, 0, 240); + m_screen->set_raw(22'096'000, 1422, 0, 1188, 259, 0, 240); + m_screen->set_raw(24553200, 1580, 0, 1320, 259, 0, 240); // dot clock guessed m_screen->set_screen_update("avdc", FUNC(scn2674_device::screen_update)); - scn2674_device &avdc(SCN2674(config, "avdc", 24553200 / 10)); - avdc.intr_callback().set_inputline(m_maincpu, I8085_RST65_LINE); - avdc.set_character_width(10); - avdc.set_display_callback(FUNC(cit220_state::draw_character)); - avdc.set_addrmap(0, &cit220_state::char_map); - avdc.set_addrmap(1, &cit220_state::attr_map); - avdc.set_screen(m_screen); + 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_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); + m_avdc->set_screen(m_screen); - scn2681_device &duart(SCN2681(config, "duart", 3686400)); + scn2681_device &duart(SCN2681(config, "duart", 3'686'400)); 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); - I8251(config, "usart", 3000000); + I8251(config, "usart", 4'000'000); - mcs48_cpu_device &kbdmcu(I8035(config, "kbdmcu", 4608000)); + mcs48_cpu_device &kbdmcu(I8035(config, "kbdmcu", 4'608'000)); kbdmcu.set_addrmap(AS_PROGRAM, &cit220_state::keyboard_map); kbdmcu.set_addrmap(AS_IO, &cit220_state::kbd_io_map); } +void cit220_state::vp122(machine_config &config) +{ + I8085A(config, m_maincpu, 8_MHz_XTAL); + m_maincpu->set_addrmap(AS_PROGRAM, &cit220_state::vp122_mem_map); + m_maincpu->set_addrmap(AS_IO, &cit220_state::vp122_io_map); + + NVRAM(config, "nvram", nvram_device::DEFAULT_ALL_0); // MK48Z02 + + SCREEN(config, m_screen, SCREEN_TYPE_RASTER); + m_screen->set_raw(14.916_MHz_XTAL, 960, 0, 800, 259, 0, 240); + //m_screen->set_raw(22.096_MHz_XTAL, 1422, 0, 1188, 259, 0, 240); + m_screen->set_screen_update("avdc", FUNC(scn2674_device::screen_update)); + + SCN2674(config, m_avdc, 14.916_MHz_XTAL / 10); + m_avdc->intr_callback().set_inputline(m_maincpu, I8085_RST65_LINE); + m_avdc->set_character_width(10); // 9 in 132-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); + m_avdc->set_screen("screen"); + + scn2681_device &duart(SCN2681(config, "duart", 3.6864_MHz_XTAL)); + 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 + + I8251(config, "usart", 8_MHz_XTAL / 2); + + PIT8253(config, "pit", 0); + // Input clocks are video-related and should differ for 80-column and 132-column modes +} + ROM_START( cit220p ) ROM_REGION(0x8000, "maincpu", 0) @@ -152,4 +218,23 @@ ROM_START( cit220p ) ROM_LOAD( "v00_kbd.bin", 0x0000, 0x1000, CRC(f9d24190) SHA1(c4e9ef8188afb18de373f2a537ca9b7a315bfb76) ) ROM_END +/************************************************************************************************************** + +ADDS Viewpoint 122 (VPT-122). +Chips: D8085AC-2, SCN2674B, SCB2675T, D8251AFC, SCN2681A, D8253C-2, 5x MB8128-15, MK48Z02B-20 +Crystals: 22.096, 14.916, 3.6864, 8.000 + +***************************************************************************************************************/ + +ROM_START( vp122 ) + ROM_REGION(0xc000, "maincpu", 0) + ROM_LOAD( "223-48600.uj1", 0x0000, 0x4000, CRC(4d140c69) SHA1(04aa5a4f0c0e0d07b9dc983a6d626ee88ef8b8ba) ) + ROM_LOAD( "223-48500.ug1", 0x4000, 0x4000, CRC(4e98554d) SHA1(0cbb9cb7efd02a3209caed410ccc8495a5ec1772) ) + ROM_LOAD( "223-49400.uj2", 0x8000, 0x4000, CRC(447d90d3) SHA1(f8c0db824198b5a571eef80cc3eaf1e829aa2c2a) ) + + ROM_REGION(0x2000, "chargen", 0) + 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 ) |