diff --git a/src/emu/xtal.cpp b/src/emu/xtal.cpp index f5dc48a1f49..4f541f5a518 100644 --- a/src/emu/xtal.cpp +++ b/src/emu/xtal.cpp @@ -287,6 +287,7 @@ const double XTAL::known_xtals[] = { 17'010'000, /* 17.01_MHz_XTAL Epic 14E */ 17'064'000, /* 17.064_MHz_XTAL Memorex 1377 */ 17'074'800, /* 17.0748_MHz_XTAL SWTPC 8212 */ + 17'320'000, /* 17.320_MHz_XTAL Visual 50 */ 17'350'000, /* 17.35_MHz_XTAL ITT Courier 1700 */ 17'360'000, /* 17.36_MHz_XTAL OMTI Series 10 SCSI controller */ 17'430'000, /* 17.43_MHz_XTAL Videx Videoterm */ diff --git a/src/mame/mame.lst b/src/mame/mame.lst index 9db9bf73913..aec62807325 100644 --- a/src/mame/mame.lst +++ b/src/mame/mame.lst @@ -45671,6 +45671,9 @@ v100 // @source:visual/v102.cpp v102 // +@source:visual/v50.cpp +visual50 // (c) 1983 Visual Technology + @source:visual/v550.cpp v550 // diff --git a/src/mame/visual/v50.cpp b/src/mame/visual/v50.cpp new file mode 100644 index 00000000000..9dc73242e03 --- /dev/null +++ b/src/mame/visual/v50.cpp @@ -0,0 +1,264 @@ +// license: BSD-3-Clause +// copyright-holders: Dirk Best +/*************************************************************************** + + Visual Technology Visual 50/55 + + VT52 compatible terminal + + Hardware: + - D780C (Z80) + - 2764 and 2732 EPROM + - 2x TMM314APL-1 (1k RAM) + - X2210D NOVRAM (64x4) + - Intel P8253-5 PIT + - D8255AC-5 PPI + - 2x D8251AC USART + - SCN2672A + - 2673 + - TMM2016P-2 (2k VRAM) + - C68100 IC240-001R00 (character generator?) + - 17.320 MHz XTAL + + TODO: + - Character generator ROM is undumped + - Keyboard (also not dumped) + - Screen rendering + - Screen brightness control + - PPI connections are unknown + - AUX port + + Notes: + - PCB marked "PA015 REV B 1183" + +***************************************************************************/ + +#include "emu.h" + +#include "bus/rs232/rs232.h" +#include "cpu/z80/z80.h" +#include "machine/i8251.h" +#include "machine/i8255.h" +#include "machine/input_merger.h" +#include "machine/pit8253.h" +#include "machine/x2212.h" +#include "video/scn2674.h" + +#include "screen.h" + + +namespace { + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +class visual50_state : public driver_device +{ +public: + visual50_state(const machine_config &mconfig, device_type type, const char *tag) : + driver_device(mconfig, type, tag), + m_maincpu(*this, "maincpu"), + m_novram(*this, "novram"), + m_pit(*this, "pit"), + m_screen(*this, "screen"), + m_pvtc(*this, "pvtc"), + m_usart(*this, "usart%u", 0U) + { } + + void visual50(machine_config &config); + +protected: + virtual void machine_start() override; + virtual void machine_reset() override; + +private: + required_device m_maincpu; + required_device m_novram; + required_device m_pit; + required_device m_screen; + required_device m_pvtc; + required_device_array m_usart; + + void mem_map(address_map &map); + void io_map(address_map &map); + void char_map(address_map &map); + + SCN2672_DRAW_CHARACTER_MEMBER(draw_character); + + uint8_t recall_r(); + void recall_w(uint8_t data); + uint8_t store_r(); + void store_w(uint8_t data); +}; + + +//************************************************************************** +// ADDRESS MAPS +//************************************************************************** + +void visual50_state::mem_map(address_map &map) +{ + map(0x0000, 0x2fff).rom().region("maincpu", 0); + map(0x8000, 0x83ff).ram(); + map(0xa000, 0xa03f).rw(m_novram, FUNC(x2210_device::read), FUNC(x2210_device::write)); + map(0xc000, 0xc000).rw(FUNC(visual50_state::recall_r), FUNC(visual50_state::recall_w)); + map(0xe000, 0xe000).rw(FUNC(visual50_state::store_r), FUNC(visual50_state::store_w)); +} + +void visual50_state::io_map(address_map &map) +{ + map.global_mask(0xff); + map(0x00, 0x07).rw(m_pvtc, FUNC(scn2672_device::read), FUNC(scn2672_device::write)); + map(0x10, 0x11).rw(m_usart[0], FUNC(i8251_device::read), FUNC(i8251_device::write)); + map(0x20, 0x21).rw(m_usart[1], FUNC(i8251_device::read), FUNC(i8251_device::write)); + map(0x40, 0x40).r(m_pvtc, FUNC(scn2672_device::buffer_r)); + map(0x50, 0x50).w(m_pvtc, FUNC(scn2672_device::buffer_w)); + map(0x60, 0x63).rw("ppi", FUNC(i8255_device::read), FUNC(i8255_device::write)); + map(0x70, 0x73).rw(m_pit, FUNC(pit8253_device::read), FUNC(pit8253_device::write)); +} + +void visual50_state::char_map(address_map &map) +{ + map(0x000, 0x7ff).ram(); +} + + +//************************************************************************** +// INPUT PORT DEFINITIONS +//************************************************************************** + +static INPUT_PORTS_START( visual50 ) +INPUT_PORTS_END + + +//************************************************************************** +// VIDEO EMULATION +//************************************************************************** + +SCN2672_DRAW_CHARACTER_MEMBER( visual50_state::draw_character ) +{ +} + + +//************************************************************************** +// MACHINE EMULATION +//************************************************************************** + +uint8_t visual50_state::recall_r() +{ + if (!machine().side_effects_disabled()) + { + m_novram->recall(1); + m_novram->recall(0); + } + + return 0xff; +} + +void visual50_state::recall_w(uint8_t data) +{ + m_novram->recall(1); + m_novram->recall(0); +} + +uint8_t visual50_state::store_r() +{ + if (!machine().side_effects_disabled()) + { + m_novram->store(1); + m_novram->store(0); + } + + return 0xff; +} + +void visual50_state::store_w(uint8_t data) +{ + m_novram->store(1); + m_novram->store(0); +} + +void visual50_state::machine_start() +{ +} + +void visual50_state::machine_reset() +{ +} + + +//************************************************************************** +// MACHINE DEFINTIONS +//************************************************************************** + +void visual50_state::visual50(machine_config &config) +{ + Z80(config, m_maincpu, 17.320_MHz_XTAL / 8); // divider not verified + m_maincpu->set_addrmap(AS_PROGRAM, &visual50_state::mem_map); + m_maincpu->set_addrmap(AS_IO, &visual50_state::io_map); + + INPUT_MERGER_ANY_HIGH(config, "mainirq").output_handler().set_inputline(m_maincpu, INPUT_LINE_IRQ0); + + X2210(config, m_novram); + + PIT8253(config, m_pit, 0); + m_pit->set_clk<0>(17.320_MHz_XTAL / 8); + m_pit->set_clk<1>(17.320_MHz_XTAL / 8); + m_pit->set_clk<2>(17.320_MHz_XTAL / 8); + m_pit->out_handler<0>().set(m_usart[0], FUNC(i8251_device::write_rxc)); // or txc? + m_pit->out_handler<1>().set(m_usart[1], FUNC(i8251_device::write_rxc)); + m_pit->out_handler<1>().append(m_usart[1], FUNC(i8251_device::write_txc)); + m_pit->out_handler<2>().set(m_usart[0], FUNC(i8251_device::write_txc)); // or rxc? + + I8255(config, "ppi"); + + SCREEN(config, m_screen, SCREEN_TYPE_RASTER); + m_screen->set_color(rgb_t::amber()); // unknown color + m_screen->set_raw(17.320_MHz_XTAL, 900, 0, 720, 321, 0, 300); + m_screen->set_screen_update(m_pvtc, FUNC(scn2672_device::screen_update)); + + SCN2672(config, m_pvtc, 17.320_MHz_XTAL / 9); + m_pvtc->intr_callback().set_inputline(m_maincpu, INPUT_LINE_NMI); + m_pvtc->set_screen("screen"); + m_pvtc->set_character_width(9); + m_pvtc->set_display_callback(FUNC(visual50_state::draw_character)); + m_pvtc->set_addrmap(0, &visual50_state::char_map); + + // mainport + I8251(config, m_usart[0], 17.320_MHz_XTAL / 8); // divider not verified + m_usart[0]->rxrdy_handler().set("mainirq", FUNC(input_merger_device::in_w<0>)); + m_usart[0]->txd_handler().set("mainport", FUNC(rs232_port_device::write_txd)); + m_usart[0]->rts_handler().set("mainport", FUNC(rs232_port_device::write_rts)); + + rs232_port_device &mainport(RS232_PORT(config, "mainport", default_rs232_devices, nullptr)); + mainport.rxd_handler().set(m_usart[0], FUNC(i8251_device::write_rxd)); + mainport.cts_handler().set(m_usart[0], FUNC(i8251_device::write_cts)); + + // keyboard + I8251(config, m_usart[1], 17.320_MHz_XTAL / 8); // divider not verified + m_usart[1]->rxrdy_handler().set("mainirq", FUNC(input_merger_device::in_w<1>)); +} + + +//************************************************************************** +// ROM DEFINITIONS +//************************************************************************** + +ROM_START( visual50 ) + ROM_REGION(0x3000, "maincpu", 0) + ROM_LOAD("e244-012.bin", 0x0000, 0x2000, CRC(755f0722) SHA1(80b90882c52c9ddcc1cf455c9195d4e1ccda8ce8)) + ROM_LOAD("e262-055.bin", 0x2000, 0x1000, CRC(90a142e8) SHA1(5f4c403b7ab09dcb3cfdc8f57f65e0a52992feed)) +ROM_END + + +} // anonymous namespace + + +//************************************************************************** +// SYSTEM DRIVERS +//************************************************************************** + +// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS +COMP( 1983, visual50, 0, 0, visual50, visual50, visual50_state, empty_init, "Visual Technology", "Visual 50", MACHINE_NOT_WORKING | MACHINE_NO_SOUND )