diff options
author | 2020-09-06 03:38:21 +0200 | |
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committer | 2020-09-06 03:39:07 +0200 | |
commit | fc855bc922616385964c3fde9f0a3cb715de3e74 (patch) | |
tree | a2d9b1befc86fa194f4870f3b4525c3743304f9e /src/mame/drivers/informer_207_376.cpp | |
parent | d39d1b94124e19f354184c7f00dea397e4e92830 (diff) |
New not working machine
-----------------------
Informer 207/376 [Dirk Best]
Diffstat (limited to 'src/mame/drivers/informer_207_376.cpp')
-rw-r--r-- | src/mame/drivers/informer_207_376.cpp | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/src/mame/drivers/informer_207_376.cpp b/src/mame/drivers/informer_207_376.cpp new file mode 100644 index 00000000000..a8eb6500334 --- /dev/null +++ b/src/mame/drivers/informer_207_376.cpp @@ -0,0 +1,293 @@ +// license: BSD-3-Clause +// copyright-holders: Dirk Best +/*************************************************************************** + + Informer 207/376 + + IBM 3270 compatible terminal + + Hardware: + - M6809 + - Z80SCC 8530 + - 6850 ACIA (up to 4) + - X2212P NVRAM + + TODO: + - Redump bad ROMs + - Dump keyboard controller and emulate it (currently HLE'd) + - Problably needs improvements to at least the Z80SCC to + properly support synchrous modes + - Figure out unknown reads/writes to the memory + - Verify NMI hookup + - Verify clock speeds + + Notes: + - Thanks to charcole and his zmachine3270 project at + https://github.com/charcole/zmachine3270 + +***************************************************************************/ + +#include "emu.h" +#include "cpu/m6809/m6809.h" +#include "machine/6850acia.h" +#include "machine/clock.h" +#include "machine/input_merger.h" +#include "machine/nvram.h" +#include "machine/z80scc.h" +#include "video/mc6845.h" +#include "bus/rs232/rs232.h" +#include "bus/rs232/printer.h" +#include "machine/informer_207_376_kbd.h" +#include "emupal.h" +#include "screen.h" + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +class informer_207_376_state : public driver_device +{ +public: + informer_207_376_state(const machine_config &mconfig, device_type type, const char *tag) : + driver_device(mconfig, type, tag), + m_maincpu(*this, "maincpu"), + m_crtc(*this, "crtc"), + m_screen(*this, "screen"), + m_palette(*this, "palette"), + m_scc(*this, "scc"), + m_acia(*this, "acia%u", 0U), + m_ram(*this, "ram"), + m_chargen(*this, "chargen"), + m_nmi_enabled(false) + { } + + void informer_207_376(machine_config &config); + +protected: + void machine_start() override; + void machine_reset() override; + +private: + required_device<cpu_device> m_maincpu; + required_device<mc6845_device> m_crtc; + required_device<screen_device> m_screen; + required_device<palette_device> m_palette; + required_device<scc85c30_device> m_scc; + required_device_array<acia6850_device, 2> m_acia; + required_shared_ptr<uint8_t> m_ram; + required_region_ptr<uint8_t> m_chargen; + + void mem_map(address_map &map); + + MC6845_UPDATE_ROW(crtc_update_row); + + void vsync_w(int state); + void nmi_control_w(uint8_t data); + + bool m_nmi_enabled; +}; + + +//************************************************************************** +// ADDRESS MAPS +//************************************************************************** + +void informer_207_376_state::mem_map(address_map &map) +{ + map(0x0000, 0x7fff).ram().share("ram"); + map(0x8000, 0x8000).rw(m_crtc, FUNC(mc6845_device::status_r), FUNC(mc6845_device::address_w)); + map(0x8001, 0x8001).rw(m_crtc, FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w)); + map(0x8400, 0x8400).lr8(NAME([] () { return 0xff; })).nopw(); // ? + map(0x8802, 0x8803).rw(m_acia[0], FUNC(acia6850_device::read), FUNC(acia6850_device::write)); + map(0x8804, 0x8805).rw(m_acia[1], FUNC(acia6850_device::read), FUNC(acia6850_device::write)); + map(0x8c00, 0x8c00).w(FUNC(informer_207_376_state::nmi_control_w)); + map(0x9400, 0x9403).rw(m_scc, FUNC(scc85c30_device::ab_dc_r), FUNC(scc85c30_device::ab_dc_w)); + map(0x9c00, 0x9cff).ram().share("nvram"); + map(0xa000, 0xffff).rom().region("maincpu", 0); +} + + +//************************************************************************** +// INPUT PORT DEFINITIONS +//************************************************************************** + +static INPUT_PORTS_START( informer_207_376 ) +INPUT_PORTS_END + + +//************************************************************************** +// VIDEO EMULATION +//************************************************************************** + +void informer_207_376_state::vsync_w(int state) +{ + if (m_nmi_enabled && state == 1) + { + m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE); + m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE); + } +} + +MC6845_UPDATE_ROW( informer_207_376_state::crtc_update_row ) +{ + const pen_t *pen = m_palette->pens(); + + for (int x = 0; x < x_count; x++) + { + uint8_t code = m_ram[ma + x]; + uint8_t data = m_chargen[(code << 4) + ra]; + + if (x == cursor_x) + data = 0xff; + + // draw 8 pixels of the character + bitmap.pix32(y, x * 8 + 7) = pen[BIT(data, 0)]; + bitmap.pix32(y, x * 8 + 6) = pen[BIT(data, 1)]; + bitmap.pix32(y, x * 8 + 5) = pen[BIT(data, 2)]; + bitmap.pix32(y, x * 8 + 4) = pen[BIT(data, 3)]; + bitmap.pix32(y, x * 8 + 3) = pen[BIT(data, 4)]; + bitmap.pix32(y, x * 8 + 2) = pen[BIT(data, 5)]; + bitmap.pix32(y, x * 8 + 1) = pen[BIT(data, 6)]; + bitmap.pix32(y, x * 8 + 0) = pen[BIT(data, 7)]; + } +} + +static const gfx_layout char_layout = +{ + 8,11, + RGN_FRAC(1,1), + 1, + { 0 }, + { 0, 1, 2, 3, 4, 5, 6, 7 }, + { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8 }, + 8*16 +}; + +static GFXDECODE_START(chars) + GFXDECODE_ENTRY("chargen", 0, char_layout, 0, 1) +GFXDECODE_END + + +//************************************************************************** +// MACHINE EMULATION +//************************************************************************** + +void informer_207_376_state::nmi_control_w(uint8_t data) +{ + // 76543--- unused? + // -----21- nmi enable? + // -------0 unused? + + m_nmi_enabled = bool(data & 0x06); +} + +void informer_207_376_state::machine_start() +{ + // register for save states + save_item(NAME(m_nmi_enabled)); +} + +void informer_207_376_state::machine_reset() +{ + m_nmi_enabled = false; +} + + +//************************************************************************** +// MACHINE DEFINTIONS +//************************************************************************** + +void printer_devices(device_slot_interface &device) +{ + device.option_add("printer", SERIAL_PRINTER); +} + +void informer_207_376_state::informer_207_376(machine_config &config) +{ + MC6809(config, m_maincpu, 36_MHz_XTAL / 4); // unknown clock + m_maincpu->set_addrmap(AS_PROGRAM, &informer_207_376_state::mem_map); + + input_merger_device &cpu_irq(INPUT_MERGER_ANY_HIGH(config, "cpu_irq")); + cpu_irq.output_handler().set_inputline(m_maincpu, M6809_IRQ_LINE); + + NVRAM(config, "nvram", nvram_device::DEFAULT_ALL_0); // 2x X2212P + + SCC85C30(config, m_scc, 0); // unknown clock + m_scc->out_txda_callback().set("com1", FUNC(rs232_port_device::write_txd)); + m_scc->out_dtra_callback().set("com1", FUNC(rs232_port_device::write_dtr)); + m_scc->out_rtsa_callback().set("com1", FUNC(rs232_port_device::write_rts)); + m_scc->out_txdb_callback().set("com2", FUNC(rs232_port_device::write_txd)); + m_scc->out_dtrb_callback().set("com2", FUNC(rs232_port_device::write_dtr)); + m_scc->out_rtsb_callback().set("com2", FUNC(rs232_port_device::write_rts)); + m_scc->out_int_callback().set("cpu_irq", FUNC(input_merger_device::in_w<0>)); + + ACIA6850(config, m_acia[0], 0); // unknown clock + m_acia[0]->txd_handler().set("kbd", FUNC(informer_207_376_kbd_hle_device::rx_w)); + m_acia[0]->irq_handler().set("cpu_irq", FUNC(input_merger_device::in_w<1>)); + + ACIA6850(config, m_acia[1], 0); // unknown clock + m_acia[1]->txd_handler().set("printer", FUNC(rs232_port_device::write_txd)); + + clock_device &acia_clock(CLOCK(config, "acia_clock", 153600)); // source? + acia_clock.signal_handler().set(m_acia[0], FUNC(acia6850_device::write_txc)); + acia_clock.signal_handler().append(m_acia[0], FUNC(acia6850_device::write_rxc)); + acia_clock.signal_handler().append(m_acia[1], FUNC(acia6850_device::write_txc)); + acia_clock.signal_handler().append(m_acia[1], FUNC(acia6850_device::write_rxc)); + + rs232_port_device &com1(RS232_PORT(config, "com1", default_rs232_devices, nullptr)); + com1.rxd_handler().set(m_scc, FUNC(scc85c30_device::rxa_w)); + com1.dcd_handler().set(m_scc, FUNC(scc85c30_device::dcda_w)); + com1.cts_handler().set(m_scc, FUNC(scc85c30_device::ctsa_w)); + + rs232_port_device &com2(RS232_PORT(config, "com2", default_rs232_devices, nullptr)); + com2.rxd_handler().set(m_scc, FUNC(scc85c30_device::rxb_w)); + com2.dcd_handler().set(m_scc, FUNC(scc85c30_device::dcdb_w)); + com2.cts_handler().set(m_scc, FUNC(scc85c30_device::ctsb_w)); + + RS232_PORT(config, "printer", printer_devices, nullptr); + + informer_207_376_kbd_hle_device &kbd(INFORMER_207_376_KBD_HLE(config, "kbd")); + kbd.tx_handler().set(m_acia[0], FUNC(acia6850_device::write_rxd)); + + // video + SCREEN(config, m_screen, SCREEN_TYPE_RASTER); + m_screen->set_color(rgb_t::green()); + m_screen->set_raw(14400000, 800, 0, 640, 300, 0, 286); // unknown clock + m_screen->set_screen_update("crtc", FUNC(mc6845_device::screen_update)); + + PALETTE(config, m_palette, palette_device::MONOCHROME); + + GFXDECODE(config, "gfxdecode", m_palette, chars); + + MC6845(config, m_crtc, 1800000); // unknown clock + m_crtc->set_screen("screen"); + m_crtc->set_show_border_area(false); + m_crtc->set_char_width(8); + m_crtc->set_update_row_callback(FUNC(informer_207_376_state::crtc_update_row)); + m_crtc->out_vsync_callback().set(FUNC(informer_207_376_state::vsync_w)); +} + + +//************************************************************************** +// ROM DEFINITIONS +//************************************************************************** + +ROM_START( in207376 ) + ROM_REGION(0x6000, "maincpu", 0) + // 79590-023 376SNA V1.00 201C 7224 (our checksum: 7264) + ROM_LOAD("79590-023.bin", 0x0000, 0x2000, BAD_DUMP CRC(ed4ff488) SHA1(fdd95c520d0288ea483b5d2e8e6c8eecb04063c1)) + // 79589-023 376 SNAV1.00 201C E86F (checksum matches) + ROM_LOAD("79589-023.bin", 0x2000, 0x4000, CRC(cdfaf629) SHA1(1f21ef6848020726ef3d7ab05166ac8590d58476)) + + ROM_REGION(0x1000, "chargen", 0) + ROM_LOAD("chargen.bin", 0x0000, 0x1000, BAD_DUMP CRC(819e4b4e) SHA1(4937e49b2d91af993e8f65f5df1d6f729e775fc4)) +ROM_END + + +//************************************************************************** +// SYSTEM DRIVERS +//************************************************************************** + +// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS +COMP( 1986, in207376, 0, 0, informer_207_376, informer_207_376, informer_207_376_state, empty_init, "Informer", "Informer 207/376", MACHINE_NOT_WORKING | MACHINE_NO_SOUND | MACHINE_SUPPORTS_SAVE ) |