summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/trs/lnw80.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/mame/trs/lnw80.cpp')
-rw-r--r--src/mame/trs/lnw80.cpp677
1 files changed, 677 insertions, 0 deletions
diff --git a/src/mame/trs/lnw80.cpp b/src/mame/trs/lnw80.cpp
new file mode 100644
index 00000000000..209cb611f0e
--- /dev/null
+++ b/src/mame/trs/lnw80.cpp
@@ -0,0 +1,677 @@
+// license:BSD-3-Clause
+// copyright-holders:Robbbert
+/***************************************************************************
+Memory map
+
+0000-37ff ROM R D0-D7
+37de UART status R/W D0-D7
+37df UART data R/W D0-D7
+37e0 for the realtime clock
+37e1 select disk drive 0 W
+37e2 cassette drive latch address W
+37e3 select disk drive 1 W
+37e4 select which cassette unit W D0-D1 (D0 selects unit 1, D1 selects unit 2)
+37e5 select disk drive 2 W
+37e7 select disk drive 3 W
+37e0-37e3 floppy motor W D0-D3
+ or floppy head select W D3
+37e8 send a byte to printer W D0-D7
+37e8 read printer status R D7
+37ec-37ef FDC WD179x R/W D0-D7
+37ec command W D0-D7
+37ec status R D0-D7
+37ed track R/W D0-D7
+37ee sector R/W D0-D7
+37ef data R/W D0-D7
+3800-38ff keyboard matrix R D0-D7
+3900-3bff unused - kbd mirrored
+3c00-3fff video RAM R/W D0-D5,D7 (or D0-D7)
+4000-ffff RAM
+
+Interrupts:
+- IRQ mode 1
+- NMI
+
+Has non-addressable links to set the baud rate. Receive and Transmit clocks are tied together.
+
+Cassette baud rates:
+- 500 baud @1.77MHz and 1000 baud @4MHz.
+
+I/O ports
+FF:
+- bits 0 and 1 are for writing a cassette
+- bit 2 must be high to turn the cassette motor on
+- bit 3 switches the display between 64 or 32 characters per line
+- bit 6 remembers the 32/64 screen mode (inverted)
+- bit 7 is for reading from a cassette
+
+FE:
+- bit 0 is for selecting inverse video of the whole screen
+- bit 1 chooses text or graphics screen
+- bit 2 enables colour
+- bit 3 is for selecting roms (low) or 16k hires area (high)
+
+Shift and Right-arrow will enable 32 cpl.
+
+SYSTEM commands:
+ - Press Break (End key) to quit
+ - Press Enter to exit with error
+ - xxxx to load program xxxx from tape.
+ - / to execute last program loaded
+ - /nnnnn to execute program at nnnnn (decimal)
+
+About the RTC - The hardware side exists, but special software is needed to get the clock to work.
+ By default, nothing happens.
+
+********************************************************************************************************
+
+To Do / Status:
+--------------
+
+- basically works
+- hi-res and colour are coded and pass the test suite, but need some real programs to check with.
+- investigate expansion-box
+- none of my collection of lnw80-specific floppies will work; some crash MAME
+
+*******************************************************************************************************/
+
+#include "emu.h"
+#include "trs80.h"
+#include "trs80_quik.h"
+#include "machine/input_merger.h"
+#include "formats/td0_dsk.h"
+#include "softlist_dev.h"
+#include "utf8.h"
+
+namespace {
+
+class lnw80_state : public trs80_state
+{
+public:
+ lnw80_state(const machine_config &mconfig, device_type type, const char *tag)
+ : trs80_state(mconfig, type, tag)
+ , m_p_gfxram(*this, "gfxram")
+ , m_lnw_bank(*this, "lnw_banked_mem")
+ { }
+
+ void lnw80(machine_config &config);
+
+protected:
+ virtual void machine_start() override ATTR_COLD;
+ virtual void machine_reset() override ATTR_COLD;
+
+private:
+ static void floppy_formats(format_registration &fr);
+ void lnw80_fe_w(u8 data);
+ u8 lnw80_fe_r();
+ void lnw80_palette(palette_device &palette) const;
+ u32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+
+ void lnw80_io(address_map &map) ATTR_COLD;
+ void lnw80_mem(address_map &map) ATTR_COLD;
+
+ u8 m_lnw_mode = 0U;
+ required_shared_ptr<u8> m_p_gfxram;
+ memory_view m_lnw_bank;
+};
+
+
+void lnw80_state::lnw80_mem(address_map &map)
+{
+ map(0x0000, 0x3fff).view(m_lnw_bank);
+ m_lnw_bank[0](0x0000, 0x2fff).rom().region("maincpu", 0);
+ m_lnw_bank[0](0x37de, 0x37de).rw(FUNC(lnw80_state::sys80_f9_r), FUNC(lnw80_state::sys80_f8_w));
+ m_lnw_bank[0](0x37e0, 0x37e3).rw(FUNC(lnw80_state::irq_status_r), FUNC(lnw80_state::motor_w));
+ m_lnw_bank[0](0x37e4, 0x37e7).w(FUNC(lnw80_state::cassunit_w));
+ m_lnw_bank[0](0x37e8, 0x37eb).rw(FUNC(lnw80_state::printer_r), FUNC(lnw80_state::printer_w));
+ m_lnw_bank[0](0x37ec, 0x37ef).rw(FUNC(lnw80_state::fdc_r), FUNC(lnw80_state::fdc_w));
+ m_lnw_bank[0](0x3800, 0x3bff).r(FUNC(lnw80_state::keyboard_r));
+ m_lnw_bank[0](0x3c00, 0x3fff).ram().share(m_p_videoram);
+ m_lnw_bank[1](0x0000, 0x3fff).ram().share(m_p_gfxram);
+ map(0x4000, 0xffff).ram();
+}
+
+void lnw80_state::lnw80_io(address_map &map)
+{
+ map.global_mask(0xff);
+ map.unmap_value_high();
+ map(0xe8, 0xe8).rw(FUNC(lnw80_state::port_e8_r), FUNC(lnw80_state::port_e8_w));
+ map(0xe9, 0xe9).portr("E9");
+ map(0xea, 0xea).rw(FUNC(lnw80_state::port_ea_r), FUNC(lnw80_state::port_ea_w));
+ map(0xeb, 0xeb).rw(m_uart, FUNC(ay31015_device::receive), FUNC(ay31015_device::transmit));
+ map(0xfe, 0xfe).rw(FUNC(lnw80_state::lnw80_fe_r), FUNC(lnw80_state::lnw80_fe_w));
+ map(0xff, 0xff).rw(FUNC(lnw80_state::port_ff_r), FUNC(lnw80_state::port_ff_w));
+}
+
+/**************************************************************************
+ w/o SHIFT with SHIFT
+ +-------------------------------+ +-------------------------------+
+ | 0 1 2 3 4 5 6 7 | | 0 1 2 3 4 5 6 7 |
++--+---+---+---+---+---+---+---+---+ +--+---+---+---+---+---+---+---+---+
+|0 | @ | A | B | C | D | E | F | G | |0 | ` | a | b | c | d | e | f | g |
+| +---+---+---+---+---+---+---+---+ | +---+---+---+---+---+---+---+---+
+|1 | H | I | J | K | L | M | N | O | |1 | h | i | j | k | l | m | n | o |
+| +---+---+---+---+---+---+---+---+ | +---+---+---+---+---+---+---+---+
+|2 | P | Q | R | S | T | U | V | W | |2 | p | q | r | s | t | u | v | w |
+| +---+---+---+---+---+---+---+---+ | +---+---+---+---+---+---+---+---+
+|3 | X | Y | Z | [ | \ | ] | ^ | _ | |3 | x | y | z | { | | | } | ~ | |
+| +---+---+---+---+---+---+---+---+ | +---+---+---+---+---+---+---+---+
+|4 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | |4 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
+| +---+---+---+---+---+---+---+---+ | +---+---+---+---+---+---+---+---+
+|5 | 8 | 9 | : | ; | , | - | . | / | |5 | 8 | 9 | * | + | < | = | > | ? |
+| +---+---+---+---+---+---+---+---+ | +---+---+---+---+---+---+---+---+
+|6 |ENT|CLR|BRK|UP |DN |LFT|RGT|SPC| |6 |ENT|CLR|BRK|UP |DN |LFT|RGT|SPC|
+| +---+---+---+---+---+---+---+---+ | +---+---+---+---+---+---+---+---+
+|7 |SHF| | | | | | | | |7 |SHF| | | | | | | |
++--+---+---+---+---+---+---+---+---+ +--+---+---+---+---+---+---+---+---+
+
+***************************************************************************/
+
+static INPUT_PORTS_START( lnw80 )
+ PORT_START("LINE0")
+ PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("@") PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('@')
+ PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_CHAR('a')
+ PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_CHAR('b')
+ PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_CHAR('c')
+ PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_CHAR('d')
+ PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_CHAR('e')
+ PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_CHAR('f')
+ PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("G") PORT_CODE(KEYCODE_G) PORT_CHAR('G') PORT_CHAR('g')
+
+ PORT_START("LINE1")
+ PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("H") PORT_CODE(KEYCODE_H) PORT_CHAR('H') PORT_CHAR('h')
+ PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("I") PORT_CODE(KEYCODE_I) PORT_CHAR('I') PORT_CHAR('i')
+ PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("J") PORT_CODE(KEYCODE_J) PORT_CHAR('J') PORT_CHAR('j')
+ PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("K") PORT_CODE(KEYCODE_K) PORT_CHAR('K') PORT_CHAR('k')
+ PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("L") PORT_CODE(KEYCODE_L) PORT_CHAR('L') PORT_CHAR('l')
+ PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("M") PORT_CODE(KEYCODE_M) PORT_CHAR('M') PORT_CHAR('m')
+ PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_NAME("N") PORT_CODE(KEYCODE_N) PORT_CHAR('N') PORT_CHAR('n')
+ PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("O") PORT_CODE(KEYCODE_O) PORT_CHAR('O') PORT_CHAR('o')
+
+ PORT_START("LINE2")
+ PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("P") PORT_CODE(KEYCODE_P) PORT_CHAR('P') PORT_CHAR('p')
+ PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("Q") PORT_CODE(KEYCODE_Q) PORT_CHAR('Q') PORT_CHAR('q')
+ PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("R") PORT_CODE(KEYCODE_R) PORT_CHAR('R') PORT_CHAR('r')
+ PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("S") PORT_CODE(KEYCODE_S) PORT_CHAR('S') PORT_CHAR('s')
+ PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("T") PORT_CODE(KEYCODE_T) PORT_CHAR('T') PORT_CHAR('t')
+ PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("U") PORT_CODE(KEYCODE_U) PORT_CHAR('U') PORT_CHAR('u')
+ PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_NAME("V") PORT_CODE(KEYCODE_V) PORT_CHAR('V') PORT_CHAR('v')
+ PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("W") PORT_CODE(KEYCODE_W) PORT_CHAR('W') PORT_CHAR('w')
+
+ PORT_START("LINE3")
+ PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("X") PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_CHAR('x')
+ PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("Y") PORT_CODE(KEYCODE_Y) PORT_CHAR('Y') PORT_CHAR('y')
+ PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("Z") PORT_CODE(KEYCODE_Z) PORT_CHAR('Z') PORT_CHAR('z')
+ PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("F1") PORT_CODE(KEYCODE_F1) PORT_CHAR(UCHAR_MAMEKEY(F1))
+ PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_NAME("F2") PORT_CODE(KEYCODE_F2) PORT_CHAR(UCHAR_MAMEKEY(F2))
+ PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("_") PORT_CODE(KEYCODE_QUOTE) PORT_CHAR('_')
+ PORT_BIT(0x28, 0x00, IPT_UNUSED)
+
+ PORT_START("LINE4")
+ PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0')
+ PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
+ PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"')
+ PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
+ PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
+ PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
+ PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
+ PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'')
+
+ PORT_START("LINE5")
+ PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(')
+ PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')')
+ PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME(": *") PORT_CODE(KEYCODE_MINUS) PORT_CHAR(':') PORT_CHAR('*')
+ PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("; +") PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+')
+ PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME(", <") PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')
+ PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("- =") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('-') PORT_CHAR('=')
+ PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_NAME(". >") PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
+ PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("/ ?") PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
+
+ PORT_START("LINE6")
+ PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("Enter") PORT_CODE(KEYCODE_ENTER) PORT_CODE(KEYCODE_ENTER_PAD) PORT_CHAR(13)
+ PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("Clear") PORT_CODE(KEYCODE_HOME) PORT_CHAR(UCHAR_MAMEKEY(F8))
+ PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("Break") PORT_CODE(KEYCODE_END) PORT_CHAR(UCHAR_MAMEKEY(F9))
+ PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME(UTF8_UP) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP))
+ PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("Down") PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN))
+ /* backspace do the same as cursor left */
+ PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("Left") PORT_CODE(KEYCODE_LEFT) PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(UCHAR_MAMEKEY(LEFT))
+ PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_NAME("Right") PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT))
+ PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
+
+ PORT_START("LINE7")
+ PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("Shift") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
+ PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("Control") PORT_CODE(KEYCODE_LCONTROL)
+ PORT_BIT(0xee, 0x00, IPT_UNUSED)
+
+ PORT_START("RESET")
+ PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("Reset") PORT_CODE(KEYCODE_DEL) PORT_CHAR(UCHAR_MAMEKEY(PAUSE)) PORT_WRITE_LINE_DEVICE_MEMBER("nmigate", FUNC(input_merger_device::in_w<0>))
+
+ PORT_START("CONFIG")
+ PORT_CONFNAME( 0x80, 0x00, "Floppy Disc Drives")
+ PORT_CONFSETTING( 0x00, DEF_STR( Off ) )
+ PORT_CONFSETTING( 0x80, DEF_STR( On ) )
+ PORT_CONFNAME( 0x40, 0x00, "CPU Speed")
+ PORT_CONFSETTING( 0x00, "1.77 MHz" )
+ PORT_CONFSETTING( 0x40, "4 MHz" )
+
+ PORT_START("E9") // these are the power-on uart settings
+ PORT_BIT(0x07, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_DIPNAME( 0x88, 0x08, "Parity")
+ PORT_DIPSETTING( 0x08, DEF_STR(None))
+ PORT_DIPSETTING( 0x00, "Odd")
+ PORT_DIPSETTING( 0x80, "Even")
+ PORT_DIPNAME( 0x10, 0x10, "Stop Bits")
+ PORT_DIPSETTING( 0x10, "2")
+ PORT_DIPSETTING( 0x00, "1")
+ PORT_DIPNAME( 0x60, 0x60, "Bits")
+ PORT_DIPSETTING( 0x00, "5")
+ PORT_DIPSETTING( 0x20, "6")
+ PORT_DIPSETTING( 0x40, "7")
+ PORT_DIPSETTING( 0x60, "8")
+
+ PORT_START("BAUD")
+ PORT_DIPNAME( 0xff, 0x06, "Baud Rate")
+ PORT_DIPSETTING( 0x00, "110")
+ PORT_DIPSETTING( 0x01, "300")
+ PORT_DIPSETTING( 0x02, "600")
+ PORT_DIPSETTING( 0x03, "1200")
+ PORT_DIPSETTING( 0x04, "2400")
+ PORT_DIPSETTING( 0x05, "4800")
+ PORT_DIPSETTING( 0x06, "9600")
+ PORT_DIPSETTING( 0x07, "19200")
+INPUT_PORTS_END
+
+
+/*************************************
+ *
+ * Port handlers.
+ *
+ *************************************/
+
+
+u8 lnw80_state::lnw80_fe_r()
+{
+ return m_lnw_mode;
+}
+
+
+/* lnw80 can switch out all the devices, roms and video ram to be replaced by graphics ram. */
+void lnw80_state::lnw80_fe_w(u8 data)
+{
+/* lnw80 video options
+ d3 bankswitch lower 16k between roms and hires ram (1=hires)
+ d2 enable colour \
+ d1 hres / these 2 are the bits from the MODE command of LNWBASIC
+ d0 inverse video (entire screen) */
+
+ m_lnw_mode = data;
+
+ m_lnw_bank.select(BIT(data, 3));
+}
+
+
+/*************************************
+ * Machine *
+ *************************************/
+
+void lnw80_state::machine_start()
+{
+ save_item(NAME(m_cpl));
+ save_item(NAME(m_irq));
+ save_item(NAME(m_mask));
+ save_item(NAME(m_reg_load));
+ save_item(NAME(m_lnw_mode));
+ save_item(NAME(m_cassette_data));
+ save_item(NAME(m_old_cassette_val));
+ save_item(NAME(m_cols));
+ save_item(NAME(m_timeout));
+
+ m_reg_load=1;
+
+ m_cassette_data_timer = timer_alloc(FUNC(lnw80_state::cassette_data_callback), this);
+ m_cassette_data_timer->adjust( attotime::zero, 0, attotime::from_hz(11025) );
+}
+
+void lnw80_state::machine_reset()
+{
+ m_cpl = 0;
+ m_cols = 0xff;
+ m_cassette_data = false;
+ const u16 s_bauds[8]={ 110, 300, 600, 1200, 2400, 4800, 9600, 19200 };
+ u16 s_clock = s_bauds[m_io_baud->read()] << 4;
+ m_uart_clock->set_unscaled_clock(s_clock);
+
+ m_maincpu->set_unscaled_clock(BIT(m_io_config->read(), 6) ? (16_MHz_XTAL / 4) : (16_MHz_XTAL / 9)); // HI-LO switch
+ m_reg_load = 1;
+ lnw80_fe_w(0);
+}
+
+/* 8-bit video, 64/80 characters per line = lnw80 */
+u32 lnw80_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
+{
+ static const u16 rows[] = { 0, 0x200, 0x100, 0x300, 1, 0x201, 0x101, 0x301 };
+ u16 sy=0,ma=0;
+ bool inv = BIT(m_lnw_mode, 0);
+ u8 mode = BIT(m_lnw_mode, 1, 2);
+ u8 cols = BIT(mode, 0) ? 80 : 64;
+ u8 skip = 1;
+ if (mode == 0)
+ {
+ skip = m_cpl ? 2 : 1;
+ if (skip == 2)
+ cols >>= 1;
+ }
+
+ if (cols != m_cols)
+ {
+ m_cols = cols;
+ screen.set_visible_area(0, cols*6-1, 0, 16*12-1);
+ }
+
+ u8 bg=7,fg=0;
+ if (inv)
+ {
+ bg = 0;
+ fg = 7;
+ }
+
+ switch (mode)
+ {
+ case 0: // MODE 0
+ for (u16 y = 0; y < 16; y++)
+ {
+ for (u16 ra = 0; ra < 12; ra++)
+ {
+ u16 *p = &bitmap.pix(sy++);
+
+ for (u16 x = ma; x < ma + 64; x+=skip)
+ {
+ u8 chr = m_p_videoram[x];
+
+ if (chr & 0x80)
+ {
+ u8 gfxbit = (ra & 0x0c)>>1;
+ /* Display one line of a lores character (6 pixels) */
+ *p++ = BIT(chr, gfxbit) ? fg : bg;
+ *p++ = BIT(chr, gfxbit) ? fg : bg;
+ *p++ = BIT(chr, gfxbit) ? fg : bg;
+ gfxbit++;
+ *p++ = BIT(chr, gfxbit) ? fg : bg;
+ *p++ = BIT(chr, gfxbit) ? fg : bg;
+ *p++ = BIT(chr, gfxbit) ? fg : bg;
+ }
+ else
+ {
+ /* get pattern of pixels for that character scanline */
+ u8 gfx;
+ if (ra < 8)
+ gfx = m_p_chargen[(chr<<1) | rows[ra] ];
+ else
+ gfx = 0;
+
+ /* Display a scanline of a character (6 pixels) */
+ *p++ = BIT(gfx, 2) ? fg : bg;
+ *p++ = BIT(gfx, 1) ? fg : bg;
+ *p++ = BIT(gfx, 6) ? fg : bg;
+ *p++ = BIT(gfx, 7) ? fg : bg;
+ *p++ = BIT(gfx, 5) ? fg : bg;
+ *p++ = BIT(gfx, 3) ? fg : bg;
+ }
+ }
+ }
+ ma+=64;
+ }
+ break;
+
+ case 1: // MODE 1
+ for (u16 y = 0; y < 0x400; y+=0x40)
+ {
+ for (u16 ra = 0; ra < 0x3000; ra+=0x400)
+ {
+ u16 *p = &bitmap.pix(sy++);
+
+ for (u16 x = 0; x < 0x40; x++)
+ {
+ u8 gfx = m_p_gfxram[ y | x | ra];
+ /* Display 6 pixels in normal region */
+ *p++ = BIT(gfx, 0) ? fg : bg;
+ *p++ = BIT(gfx, 1) ? fg : bg;
+ *p++ = BIT(gfx, 2) ? fg : bg;
+ *p++ = BIT(gfx, 3) ? fg : bg;
+ *p++ = BIT(gfx, 4) ? fg : bg;
+ *p++ = BIT(gfx, 5) ? fg : bg;
+ }
+
+ for (u16 x = 0; x < 0x10; x++)
+ {
+ u8 gfx = m_p_gfxram[ 0x3000 | x | (ra & 0xc00) | ((ra & 0x3000) >> 8)];
+ /* Display 6 pixels in extended region */
+ *p++ = BIT(gfx, 0) ? fg : bg;
+ *p++ = BIT(gfx, 1) ? fg : bg;
+ *p++ = BIT(gfx, 2) ? fg : bg;
+ *p++ = BIT(gfx, 3) ? fg : bg;
+ *p++ = BIT(gfx, 4) ? fg : bg;
+ *p++ = BIT(gfx, 5) ? fg : bg;
+ }
+ }
+ }
+ break;
+
+ case 2: // MODE 2
+ /* it seems the text video ram can have an effect in this mode,
+ not explained clearly, so not emulated */
+ for (u16 y = 0; y < 0x400; y+=0x40)
+ {
+ for (u16 ra = 0; ra < 0x3000; ra+=0x400)
+ {
+ u16 *p = &bitmap.pix(sy++);
+
+ for (u16 x = 0; x < 0x40; x++)
+ {
+ u8 gfx = m_p_gfxram[ y | x | ra];
+ /* Display 6 pixels in normal region */
+ fg = BIT(gfx, 3, 3);
+ *p++ = fg;
+ *p++ = fg;
+ *p++ = fg;
+ fg = BIT(gfx, 0, 3);
+ *p++ = fg;
+ *p++ = fg;
+ *p++ = fg;
+ }
+ }
+ }
+ break;
+
+ case 3: // MODE 3
+ /* the manual does not explain at all how colour is determined
+ for the extended area. Further, the background colour
+ is not mentioned anywhere. Black is assumed. */
+ for (u16 y = 0; y < 0x400; y+=0x40)
+ {
+ for (u16 ra = 0; ra < 0x3000; ra+=0x400)
+ {
+ u16 *p = &bitmap.pix(sy++);
+
+ for (u16 x = 0; x < 0x40; x++)
+ {
+ u8 gfx = m_p_gfxram[ y | x | ra];
+ fg = BIT(m_p_videoram[ x | y ], 3, 3);
+ /* Display 6 pixels in normal region */
+ *p++ = BIT(gfx, 0) ? fg : bg;
+ *p++ = BIT(gfx, 1) ? fg : bg;
+ *p++ = BIT(gfx, 2) ? fg : bg;
+ fg = BIT(m_p_videoram[ 0x3c00 | x | y ], 0, 3);
+ *p++ = BIT(gfx, 3) ? fg : bg;
+ *p++ = BIT(gfx, 4) ? fg : bg;
+ *p++ = BIT(gfx, 5) ? fg : bg;
+ }
+
+ for (u16 x = 0; x < 0x10; x++)
+ {
+ u8 gfx = m_p_gfxram[ 0x3000 | x | (ra & 0xc00) | ((ra & 0x3000) >> 8)];
+ fg = BIT(m_p_gfxram[ 0x3c00 | x | y ], 3, 3);
+ /* Display 6 pixels in extended region */
+ *p++ = BIT(gfx, 0) ? fg : bg;
+ *p++ = BIT(gfx, 1) ? fg : bg;
+ *p++ = BIT(gfx, 2) ? fg : bg;
+ fg = BIT(m_p_gfxram[ 0x3c00 | x | y ], 0, 3);
+ *p++ = BIT(gfx, 3) ? fg : bg;
+ *p++ = BIT(gfx, 4) ? fg : bg;
+ *p++ = BIT(gfx, 5) ? fg : bg;
+ }
+ }
+ }
+ break;
+ }
+ return 0;
+}
+
+/***************************************************************************
+ Palettes
+***************************************************************************/
+
+/* Levels are unknown - guessing */
+static constexpr rgb_t lnw80_pens[] =
+{
+ { 220, 220, 220 }, // white
+ { 0, 175, 0 }, // green
+ { 200, 200, 0 }, // yellow
+ { 255, 0, 0 }, // red
+ { 255, 0, 255 }, // magenta
+ { 0, 0, 175 }, // blue
+ { 0, 255, 255 }, // cyan
+ { 0, 0, 0 } // black
+};
+
+void lnw80_state::lnw80_palette(palette_device &palette) const
+{
+ palette.set_pen_colors(0, lnw80_pens);
+}
+
+/**************************** F4 CHARACTER DISPLAYER ***********************************************************/
+static const gfx_layout lnw80_charlayout =
+{
+ 8, 8, /* 8 x 8 characters */
+ 128, /* 128 characters */
+ 1, /* 1 bits per pixel */
+ { 0 }, /* no bitplanes */
+ /* x offsets */
+ { 7, 5, 6, 1, 0, 2, 4, 3 },
+ /* y offsets */
+ { 0*8, 512*8, 256*8, 768*8, 1*8, 513*8, 257*8, 769*8 },
+ 8*2 /* every char takes 8 bytes */
+};
+
+static GFXDECODE_START(gfx_lnw80)
+ GFXDECODE_ENTRY( "chargen", 0, lnw80_charlayout, 0, 4 )
+GFXDECODE_END
+
+
+void lnw80_state::floppy_formats(format_registration &fr)
+{
+ fr.add(FLOPPY_JV1_FORMAT);
+ fr.add(FLOPPY_TD0_FORMAT);
+}
+
+static void lnw80_floppies(device_slot_interface &device)
+{
+ device.option_add("sssd", FLOPPY_525_QD); // QD allows the 80-track boot disks to work.
+}
+
+
+void lnw80_state::lnw80(machine_config &config)
+{
+ /* basic machine hardware */
+ Z80(config, m_maincpu, 16_MHz_XTAL / 9);
+ m_maincpu->set_addrmap(AS_PROGRAM, &lnw80_state::lnw80_mem);
+ m_maincpu->set_addrmap(AS_IO, &lnw80_state::lnw80_io);
+ m_maincpu->halt_cb().set("nmigate", FUNC(input_merger_device::in_w<1>));
+
+ input_merger_device &nmigate(INPUT_MERGER_ANY_HIGH(config, "nmigate"));
+ nmigate.output_handler().set_inputline(m_maincpu, INPUT_LINE_NMI); // TODO: also causes SYSRES on expansion bus
+
+ /* video hardware */
+ screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
+ // LNW80 Theory of Operations gives H and V periods as 15.750kHz and 59.66Hz, probably due to rounding the calculated ~15.7468kHz to 4 figures
+ screen.set_raw(3.579545_MHz_XTAL * 3, 682, 0, 480, 264, 0, 192); // 10.738MHz generated by tank circuit (top left of page 2 of schematics)
+ screen.set_screen_update(FUNC(lnw80_state::screen_update));
+ screen.set_palette("palette");
+ PALETTE(config, "palette", FUNC(lnw80_state::lnw80_palette), 8);
+ GFXDECODE(config, "gfxdecode", "palette", gfx_lnw80);
+
+ /* sound hardware */
+ SPEAKER(config, "mono").front_center();
+ SPEAKER_SOUND(config, "speaker").add_route(ALL_OUTPUTS, "mono", 0.50);
+
+ /* devices */
+ CASSETTE(config, m_cassette);
+ m_cassette->set_formats(trs80l2_cassette_formats);
+ m_cassette->set_default_state(CASSETTE_PLAY);
+ m_cassette->add_route(ALL_OUTPUTS, "mono", 0.05);
+ m_cassette->set_interface("trs80_cass");
+
+ TRS80_QUICKLOAD(config, "quickload", m_maincpu, attotime::from_seconds(1));
+
+ FD1771(config, m_fdc, 4_MHz_XTAL / 4);
+ m_fdc->intrq_wr_callback().set(FUNC(lnw80_state::intrq_w));
+
+ FLOPPY_CONNECTOR(config, m_floppy[0], lnw80_floppies, "sssd", lnw80_state::floppy_formats).enable_sound(true);
+ FLOPPY_CONNECTOR(config, m_floppy[1], lnw80_floppies, "sssd", lnw80_state::floppy_formats).enable_sound(true);
+ FLOPPY_CONNECTOR(config, m_floppy[2], lnw80_floppies, nullptr, lnw80_state::floppy_formats).enable_sound(true);
+ FLOPPY_CONNECTOR(config, m_floppy[3], lnw80_floppies, nullptr, lnw80_state::floppy_formats).enable_sound(true);
+
+ CENTRONICS(config, m_centronics, centronics_devices, "printer");
+ m_centronics->busy_handler().set(m_cent_status_in, FUNC(input_buffer_device::write_bit7));
+ m_centronics->perror_handler().set(m_cent_status_in, FUNC(input_buffer_device::write_bit6));
+ m_centronics->select_handler().set(m_cent_status_in, FUNC(input_buffer_device::write_bit5));
+ m_centronics->fault_handler().set(m_cent_status_in, FUNC(input_buffer_device::write_bit4));
+
+ INPUT_BUFFER(config, m_cent_status_in);
+
+ OUTPUT_LATCH(config, m_cent_data_out);
+ m_centronics->set_output_latch(*m_cent_data_out);
+
+ CLOCK(config, m_uart_clock, 19200 * 16);
+ m_uart_clock->signal_handler().set(m_uart, FUNC(ay31015_device::write_rcp));
+ m_uart_clock->signal_handler().append(m_uart, FUNC(ay31015_device::write_tcp));
+
+ AY31015(config, m_uart);
+ m_uart->read_si_callback().set("rs232", FUNC(rs232_port_device::rxd_r));
+ m_uart->write_so_callback().set("rs232", FUNC(rs232_port_device::write_txd));
+ //MCFG_AY31015_WRITE_DAV_CB(WRITELINE( , , ))
+ m_uart->set_auto_rdav(true);
+ RS232_PORT(config, "rs232", default_rs232_devices, nullptr);
+
+ SOFTWARE_LIST(config, "cass_list").set_original("trs80_cass").set_filter("1"); // L
+ SOFTWARE_LIST(config, "quik_list").set_original("trs80_quik").set_filter("1"); // L
+ SOFTWARE_LIST(config, "flop_list").set_original("trs80_flop").set_filter("1"); // L
+}
+
+
+/***************************************************************************
+
+ Game driver(s)
+
+***************************************************************************/
+
+ROM_START(lnw80)
+ ROM_REGION(0x3000, "maincpu", 0)
+ ROM_LOAD("lnw_a.u78", 0x0000, 0x0800, CRC(e09f7e91) SHA1(cd28e72efcfebde6cf1c7dbec4a4880a69e683da) )
+ ROM_LOAD("lnw_a1.u75", 0x0800, 0x0800, CRC(ac297d99) SHA1(ccf31d3f9d02c3b68a0ee3be4984424df0e83ab0) )
+ ROM_LOAD("lnw_b.u79", 0x1000, 0x0800, CRC(c4303568) SHA1(13e3d81c6f0de0e93956fa58c465b5368ea51682) )
+ ROM_LOAD("lnw_b1.u76", 0x1800, 0x0800, CRC(3a5ea239) SHA1(8c489670977892d7f2bfb098f5df0b4dfa8fbba6) )
+ ROM_LOAD("lnw_c.u80", 0x2000, 0x0800, CRC(2ba025d7) SHA1(232efbe23c3f5c2c6655466ebc0a51cf3697be9b) )
+ ROM_LOAD("lnw_c1.u77", 0x2800, 0x0800, CRC(ed547445) SHA1(20102de89a3ee4a65366bc2d62be94da984a156b) )
+
+ ROM_REGION(0x0800, "chargen", 0)
+ ROM_LOAD("lnw_chr.u100", 0x0000, 0x0800, CRC(c89b27df) SHA1(be2a009a07e4378d070002a558705e9a0de59389) )
+
+ ROM_REGION(0x0020, "proms", 0)
+ ROM_LOAD_OPTIONAL("lnw_ntsc.u130", 0x0000, 0x0020, CRC(b990a207) SHA1(1a1cc3150cbfed76b1c88c0d561f9bee954f3234) )
+ROM_END
+
+} // anonymous namespace
+
+// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
+COMP( 1981, lnw80, 0, trs80l2, lnw80, lnw80, lnw80_state, empty_init, "LNW Research", "LNW-80", MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE )