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Diffstat (limited to 'src/mame/drivers/crei680.cpp')
-rw-r--r-- | src/mame/drivers/crei680.cpp | 339 |
1 files changed, 0 insertions, 339 deletions
diff --git a/src/mame/drivers/crei680.cpp b/src/mame/drivers/crei680.cpp deleted file mode 100644 index b6ff30be9ff..00000000000 --- a/src/mame/drivers/crei680.cpp +++ /dev/null @@ -1,339 +0,0 @@ -// 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 ) |