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diff --git a/src/mame/drivers/crei680.cpp b/src/mame/drivers/crei680.cpp
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-// license:BSD-3-Clause
-// copyright-holders:Robbbert
-/********************************************************************************
-
-CREI680 trainer.
-
-This has 2 boards, the CPU board with the buttons, LEDs etc,
-and the video board.
-
-Like many machines of this era, the cassette circuit is grossly overcomplicated,
-using a 3301 op-amp, a 75140 line receiver and a bunch of CMOS logic ICs. Since
-the first of these (a 14040B) divides the E clock down to 300 * 16 to generate
-the ACIA's TXC input, the format can be assumed to be Kansas City.
-
-The schematic is missing some information, so we've guessed a few things.
-We don't have any instructions, user manual or anything - just the schematic.
-
-TODO:
-- Cassette to test when we find out how to use it.
-- Single-step circuit
-- Add paste facility, although it will be difficult with having to set each
- individual bit of each byte. If the byte already is non-zero, it won't
- know what to do.
-
-
-**********************************************************************************/
-
-
-#include "emu.h"
-#include "cpu/m6800/m6800.h"
-#include "imagedev/cassette.h"
-#include "machine/6821pia.h"
-#include "machine/6850acia.h"
-#include "machine/clock.h"
-#include "machine/timer.h"
-#include "video/mc6845.h"
-#include "sound/beep.h"
-#include "emupal.h"
-#include "screen.h"
-#include "speaker.h"
-#include "crei680.lh"
-
-
-class crei680_state : public driver_device
-{
-public:
- crei680_state(const machine_config &mconfig, device_type type, const char *tag)
- : driver_device(mconfig, type, tag)
- , m_maincpu(*this, "maincpu")
- , m_cass(*this, "cassette")
- , m_pia0(*this, "pia0")
- , m_pia1(*this, "pia1")
- , m_uart(*this, "uart")
- , m_crtc(*this, "crtc")
- , m_vram(*this, "videoram")
- , m_cgen(*this, "chargen")
- , m_palette(*this, "palette")
- , m_beep(*this, "beeper")
- , m_leds(*this, "led%u", 0U)
- { }
-
-
- void crei680(machine_config &config);
-
- DECLARE_INPUT_CHANGED_MEMBER(reset_button);
-
-private:
- TIMER_DEVICE_CALLBACK_MEMBER(kansas_w);
- TIMER_DEVICE_CALLBACK_MEMBER(kansas_r);
- MC6845_UPDATE_ROW(crtc_update_row);
-
- void mem_map(address_map &map);
-
- void pia0b_w(u8);
- void pia1b_w(u8);
- void piaset_w(offs_t, u8);
- bool m_cassbit = 0;
- bool m_cassold = 0;
- u8 m_cass_data[4] = { 0, };
- void machine_start() override;
- void machine_reset() override;
- required_device<cpu_device> m_maincpu;
- required_device<cassette_image_device> m_cass;
- required_device<pia6821_device> m_pia0;
- required_device<pia6821_device> m_pia1;
- required_device<acia6850_device> m_uart;
- required_device<mc6845_device> m_crtc;
- required_shared_ptr<u8> m_vram;
- required_region_ptr<u8> m_cgen;
- required_device<palette_device> m_palette;
- required_device<beep_device> m_beep;
- output_finder<8> m_leds;
-};
-
-
-/* Memory Maps */
-
-void crei680_state::mem_map(address_map &map)
-{
- map(0x0080, 0x017f).ram(); // mc6810
- map(0x3000, 0x3fff).ram(); // 8x 2114
- map(0xc004, 0xc007).rw(m_pia0, FUNC(pia6821_device::read), FUNC(pia6821_device::write));
- map(0xc008, 0xc009).rw(m_uart, FUNC(acia6850_device::read), FUNC(acia6850_device::write));
- map(0xc010, 0xc010).rw(m_crtc, FUNC(mc6845_device::status_r), FUNC(mc6845_device::address_w));
- map(0xc011, 0xc011).rw(m_crtc, FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w));
- map(0xc020, 0xc023).rw(m_pia1, FUNC(pia6821_device::read), FUNC(pia6821_device::write));
- map(0xc024, 0xc027).w(FUNC(crei680_state::piaset_w));
- map(0xd000, 0xd3ff).ram().share("videoram"); // 6x 2102
- map(0xe000, 0xefff).rom().region("basic", 0); // 68A332
- map(0xf000, 0xffff).rom().region("maincpu", 0); // 68A332
-}
-
-/* Input Ports */
-
-static INPUT_PORTS_START( crei680 )
- PORT_START("X0")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_NAME("bit0") // toggle bit0 of data
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_NAME("bit1") // ...etc...
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_NAME("bit2")
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_NAME("bit3")
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_NAME("bit4")
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_NAME("bit5")
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_NAME("bit6")
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_NAME("bit7")
-
- PORT_START("X1")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_R) PORT_NAME("REG") // Examine or set register
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_L) PORT_NAME("LAD") // Set low byte of address
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_H) PORT_NAME("HAD") // Set high byte of address
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_X) PORT_NAME("RUN") // Execute
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_DOWN) PORT_NAME("DEC") // Previous address or register
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_UP) PORT_NAME("INC") // Next address or register
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_EQUALS) PORT_NAME("DATA") // Switch between address and data modes
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )
-
- PORT_START("RESET")
- PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("RST") PORT_CODE(KEYCODE_LALT) PORT_CHANGED_MEMBER(DEVICE_SELF, crei680_state, reset_button, 0)
-INPUT_PORTS_END
-
-INPUT_CHANGED_MEMBER(crei680_state::reset_button)
-{
- if (newval)
- {
- m_pia0->reset();
- m_pia1->reset();
- }
- m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? ASSERT_LINE : CLEAR_LINE);
-}
-
-/* Video */
-/* F4 Character Displayer */
-static const gfx_layout charlayout =
-{
- 8, 8, /* 8 x 8 characters */
- 128, /* 64 characters */
- 1, /* 1 bits per pixel */
- { 0 }, /* no bitplanes */
- /* x offsets */
- { 0, 1, 2, 3, 4, 5, 6, 7 },
- /* y offsets */
- { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
- 8*8 /* every char takes 16 bytes */
-};
-
-static GFXDECODE_START( gfx_crei680 )
- GFXDECODE_ENTRY( "chargen", 0x0000, charlayout, 0, 1 )
-GFXDECODE_END
-
-MC6845_UPDATE_ROW( crei680_state::crtc_update_row )
-{
- rgb_t const *const palette = m_palette->palette()->entry_list_raw();
- u32 *p = &bitmap.pix(y);
-
- for (u16 x = 0; x < x_count; x++)
- {
- u16 mem = (ma + x) & 0x3ff;
- u8 chr = m_vram[mem] & 0x3f; // video ram is 6 bit.
- if (chr < 0x20)
- chr |= 0x40;
- u8 gfx = (ra < 8) ? m_cgen[(chr<<3) | ra] : 0;
-
- /* Display a scanline of a character (6 pixels) */
- *p++ = palette[BIT(gfx, 5)];
- *p++ = palette[BIT(gfx, 4)];
- *p++ = palette[BIT(gfx, 3)];
- *p++ = palette[BIT(gfx, 2)];
- *p++ = palette[BIT(gfx, 1)];
- *p++ = palette[BIT(gfx, 0)];
- }
-}
-
-TIMER_DEVICE_CALLBACK_MEMBER(crei680_state::kansas_w)
-{
- m_cass_data[3]++;
-
- if (m_cassbit != m_cassold)
- {
- m_cass_data[3] = 0;
- m_cassold = m_cassbit;
- }
-
- if (m_cassbit)
- m_cass->output(BIT(m_cass_data[3], 0) ? -1.0 : +1.0); // 2400Hz
- else
- m_cass->output(BIT(m_cass_data[3], 1) ? -1.0 : +1.0); // 1200Hz
-}
-
-TIMER_DEVICE_CALLBACK_MEMBER(crei680_state::kansas_r)
-{
- /* cassette - turn 1200/2400Hz to a bit */
- m_cass_data[1]++;
- u8 cass_ws = (m_cass->input() > +0.03) ? 1 : 0;
-
- if (cass_ws != m_cass_data[0])
- {
- m_cass_data[0] = cass_ws;
- m_uart->write_rxd((m_cass_data[1] < 12) ? 1 : 0);
- m_cass_data[1] = 0;
- }
-}
-
-void crei680_state::pia0b_w(u8 data)
-{
- /* d0/1 = both low for beep
- d4 = cassette relay
- others are mystery circuits */
- m_beep->set_state(BIT(data, 0, 2) ? 0 : 1);
- m_cass->change_state((BIT(data,4)) ? CASSETTE_MOTOR_ENABLED : CASSETTE_MOTOR_DISABLED, CASSETTE_MASK_MOTOR);
-}
-
-void crei680_state::pia1b_w(u8 data)
-{
- for (u8 i = 0; i < 8; i++)
- m_leds[i] = !BIT(data, i);
-}
-
-// The various devices in the cxxx range are selected by an address line. This means things clash
-// if 2 or more are selected at the same time. Normally this could be ignored, except that the
-// bootup sequence writes to the 2 PIAs at the same time in one particular instruction.
-void crei680_state::piaset_w(offs_t offset, u8 data)
-{
- m_pia0->write(offset, data);
- m_pia1->write(offset, data);
-}
-
-/* Machine Initialization */
-
-void crei680_state::machine_start()
-{
- m_leds.resolve();
- save_item(NAME(m_cassold));
- save_item(NAME(m_cass_data));
- save_item(NAME(m_cassbit));
-}
-
-void crei680_state::machine_reset()
-{
- m_beep->set_state(0);
- m_cass_data[0] = 0;
- m_cass_data[1] = 0;
- m_cass_data[3] = 0;
-}
-
-/* Machine Drivers */
-
-void crei680_state::crei680(machine_config &config)
-{
- /* basic machine hardware */
- M6802(config, m_maincpu, 2.4576_MHz_XTAL);
- m_maincpu->set_addrmap(AS_PROGRAM, &crei680_state::mem_map);
-
- /* video hardware */
- config.set_default_layout(layout_crei680);
- screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
- screen.set_refresh_hz(50);
- screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
- screen.set_size(640, 480);
- screen.set_visarea(0, 640-1, 0, 480-1);
- screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update));
- PALETTE(config, m_palette, palette_device::MONOCHROME);
- GFXDECODE(config, "gfxdecode", m_palette, gfx_crei680);
-
- MC6845(config, m_crtc, 5281920/6);
- m_crtc->set_screen("screen");
- m_crtc->set_show_border_area(false);
- m_crtc->set_char_width(6);
- m_crtc->set_update_row_callback(FUNC(crei680_state::crtc_update_row));
-
- /* sound hardware */
- SPEAKER(config, "mono").front_center();
- BEEP(config, "beeper", 900).add_route(ALL_OUTPUTS, "mono", 0.50);
-
- /* devices */
- PIA6821(config, m_pia0, 0);
- m_pia0->readpa_handler().set_ioport("X1");
- m_pia0->writepb_handler().set(FUNC(crei680_state::pia0b_w));
- //m_pia0->cb2_handler().set(FUNC(crei680_state::screen_w));
- m_pia0->irqa_handler().set_inputline("maincpu", M6800_IRQ_LINE);
- m_pia0->irqb_handler().set_inputline("maincpu", M6800_IRQ_LINE);
-
- PIA6821(config, m_pia1, 0);
- m_pia1->readpa_handler().set_ioport("X0");
- m_pia1->writepb_handler().set(FUNC(crei680_state::pia1b_w));
- //m_pia1->cb2_handler().set(FUNC(crei680_state::screen_w));
- m_pia1->irqa_handler().set_inputline("maincpu", M6800_IRQ_LINE);
- m_pia1->irqb_handler().set_inputline("maincpu", M6800_IRQ_LINE);
-
- CASSETTE(config, m_cass);
- m_cass->set_default_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED);
- m_cass->add_route(ALL_OUTPUTS, "mono", 0.05);
-
- ACIA6850(config, m_uart, 0);
- m_uart->txd_handler().set([this] (bool state) { m_cassbit = state; });
- //m_uart->rts_handler().set(FUNC(crei680_state::acia_rts_w));
- m_uart->irq_handler().set_inputline("maincpu", M6800_IRQ_LINE);
-
- clock_device &acia_clock(CLOCK(config, "acia_clock", 2.4576_MHz_XTAL / 4 / 128));
- acia_clock.signal_handler().set("uart", FUNC(acia6850_device::write_txc)); // connected directly
- acia_clock.signal_handler().append("uart", FUNC(acia6850_device::write_rxc)); // FIXME: modulated by RXD
-
- TIMER(config, "kansas_w").configure_periodic(FUNC(crei680_state::kansas_w), attotime::from_hz(4800));
- TIMER(config, "kansas_r").configure_periodic(FUNC(crei680_state::kansas_r), attotime::from_hz(40000));
-}
-
-/* ROMs */
-
-ROM_START( crei680 )
- ROM_REGION( 0x1000, "maincpu", 0 )
- ROM_LOAD( "monitor.u19", 0x0000, 0x1000, CRC(0f95918e) SHA1(8cd675cc3a7b38ccd0975ef44f3e954d21711e0a) ) // cpu board
-
- ROM_REGION( 0x1000, "basic", 0 )
- ROM_LOAD( "basic.u13", 0x0000, 0x1000, CRC(339d5557) SHA1(74763e6416a124dda5c18e6cfa71c4c6848c0ac9) ) // video board
-
- ROM_REGION( 0x0400, "chargen", 0 )
- ROM_LOAD( "mcm6674p.u9", 0x0000, 0x0400, CRC(1c22088a) SHA1(b5f0bd0cfdec0cd5c1cb764506bef3c17d6af0eb) ) // video board
-ROM_END
-
-// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
-COMP( 19??, crei680, 0, 0, crei680, crei680, crei680_state, empty_init, "Capital Radio Engineering Institute", "CREI 680", MACHINE_SUPPORTS_SAVE )