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author Robbbert <Robbbert@users.noreply.github.com>2021-04-16 15:54:33 +1000
committer Robbbert <Robbbert@users.noreply.github.com>2021-04-16 15:54:33 +1000
commit4269a895250c7261685062f0d505fee85f8759e5 (patch)
treeb878f614ca2fbaf61471fa5c9b561f7b0dac2796
parent6462fb5e0097a1ce3c7fe9b538cc3bbd4ef5e50a (diff)
New machines marked as NOT_WORKING
---------------------------------- Lobo Max-80
-rw-r--r--scripts/target/mame/mess.lua1
-rw-r--r--src/mame/drivers/max80.cpp506
-rw-r--r--src/mame/mame.lst3
-rw-r--r--src/mame/mess.flt1
4 files changed, 511 insertions, 0 deletions
diff --git a/scripts/target/mame/mess.lua b/scripts/target/mame/mess.lua
index 9a559d057fe..f96be00c4c5 100644
--- a/scripts/target/mame/mess.lua
+++ b/scripts/target/mame/mess.lua
@@ -4059,6 +4059,7 @@ files {
MAME_DIR .. "src/mame/video/gime.cpp",
MAME_DIR .. "src/mame/video/gime.h",
MAME_DIR .. "src/mame/drivers/lnw80.cpp",
+ MAME_DIR .. "src/mame/drivers/max80.cpp",
MAME_DIR .. "src/mame/drivers/trs80.cpp",
MAME_DIR .. "src/mame/includes/trs80.h",
MAME_DIR .. "src/mame/machine/trs80.cpp",
diff --git a/src/mame/drivers/max80.cpp b/src/mame/drivers/max80.cpp
new file mode 100644
index 00000000000..4c402c4d753
--- /dev/null
+++ b/src/mame/drivers/max80.cpp
@@ -0,0 +1,506 @@
+// license:BSD-3-Clause
+// copyright-holders:Robbbert
+/***************************************************************************
+
+A business-only clone of the TRS-80 Model III.
+
+All controllers are built-in. Disk drives are required. It can
+boot from any size floppy or from a hard disk. All the drives are
+in external enclosures. External connections are:
+- 5.25 floppy connector (up to 4 drives)
+- 8 floppy connector (up to 4 drives)
+- HD connector (1 only, gives total of 9 drives)
+- Serial A
+- Serial B
+- Expansion I/O
+
+All configuration comes from the floppy image. This includes setting up
+the CRTC, the character generator, the SIO and the keyboard.
+
+There was a Technical Manual, but I was unable to find a copy, and so
+everything in here is based upon what could be gleaned from the schematic.
+
+There's IMD floppy images available, but it's unknown what kind of drive
+is needed. I was not able to boot anything.
+
+Organisation of memory:
+- There's 128K of RAM, split into 32k sections. Bits 6,7 of 7FC control the
+ banking. According to the disassembly, 0x80 selects A1 and B1, while 0x40
+ selects A1 and A2. I presume that the 64K banks are A and B, and their 32K
+ halves are 1 and 2. It's unknown what combinations 0x00 and 0xC0 select.
+
+- Overlaid on this is a special 4K-sized bank which holds the ROM, the video
+ RAM and all the devices. This bank can be anywhere in memory on a 4K boundary
+ chosen by writing to x7DC. Further, the 4K bank has some unassigned areas,
+ allowing the underlying main ram to shine through. It's unknown what happens
+ if you attempt to write to ROM. The bank is initially at address 0-FFF.
+
+NOTE on character generation:
+- There's no character generator ROM. All definitions are in a 6116 RAM at
+ an unknown address within the 4K bank. Therefore nothing can be seen until
+ a successful boot from disk, which contains the font data, and also does
+ initialisation of the CRTC. Video RAM resides in another 6116, which is
+ also in the 4K bank.
+
+Booting:
+- A sector is read into main RAM starting at 0x400. Then it is executed and
+ the process of booting can begin. In TRS-80 compatible-mode (a disk program),
+ the 4K bank is moved to 0x3000.
+
+***************************************************************************
+
+
+To Do: Almost everything.
+Status: Beeps every so often. Unable to read the disk.
+
+
+***************************************************************************/
+
+#include "emu.h"
+#include "cpu/z80/z80.h"
+//#include "machine/ram.h"
+#include "imagedev/floppy.h"
+#include "imagedev/snapquik.h"
+#include "machine/z80sio.h"
+#include "machine/z80pio.h"
+#include "machine/com8116.h"
+#include "machine/msm5832.h"
+//#include "bus/rs232/rs232.h"
+#include "machine/wd_fdc.h"
+#include "sound/beep.h"
+#include "machine/timer.h"
+#include "video/mc6845.h"
+#include "emupal.h"
+#include "screen.h"
+#include "speaker.h"
+#include "formats/imd_dsk.h"
+//#include "formats/trs80_dsk.h"
+//#include "formats/dmk_dsk.h"
+
+class max80_state : public driver_device
+{
+public:
+ max80_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag)
+ , m_maincpu(*this, "maincpu")
+// , m_p_chargen(*this, "chargen")
+// , m_vram(*this, "videoram")
+ , m_palette(*this, "palette")
+ , m_pio(*this, "pio")
+ , m_crtc(*this, "crtc")
+ , m_uart(*this, "uart")
+ , m_brg(*this, "brg")
+ , m_beep(*this, "beeper")
+ , m_beep_timer(*this, "beep_timer")
+ , m_rtc(*this, "rtc")
+ , m_fdc(*this, "fdc")
+ , m_floppy0(*this, "fdc:0")
+ , m_floppy1(*this, "fdc:1")
+ , m_floppy2(*this, "fdc:2")
+ , m_floppy3(*this, "fdc:3")
+ , m_io_keyboard(*this, "LINE%u", 0)
+// , m_mainram(*this, RAM_TAG)
+ { }
+
+ void max80(machine_config &config);
+
+protected:
+ virtual void machine_start() override;
+ virtual void machine_reset() override;
+
+private:
+ static void floppy_formats(format_registration &fr);
+ u8 keyboard_r(offs_t offset);
+ void beep_w(offs_t offset, u8 data);
+ void mode_w(offs_t offset, u8 data);
+ void drive_w(offs_t offset, u8 data);
+ u8 fdc_status_r(offs_t offset);
+ u8 pio_pa_r(offs_t offset);
+ void pio_pa_w(offs_t offset, u8 data);
+ void pio_pb_w(offs_t offset, u8 data);
+
+ DECLARE_WRITE_LINE_MEMBER(intrq_w);
+ DECLARE_WRITE_LINE_MEMBER(drq_w);
+ MC6845_UPDATE_ROW(crtc_update_row);
+ TIMER_DEVICE_CALLBACK_MEMBER(beep_timer);
+
+ void mem_map(address_map &map);
+
+ u8 m_size_store = 0;
+ bool m_fdc_drq = 0;
+ bool m_fdc_int = 0;
+ bool m_allow_nmi = 0;
+ u8 m_mode = 0;
+ floppy_image_device *m_floppy;
+ required_device<cpu_device> m_maincpu;
+ //required_region_ptr<u8> m_p_chargen;
+ //required_shared_ptr<u8> m_p_vram;
+ required_device<palette_device> m_palette;
+ required_device<z80pio_device> m_pio;
+ required_device<mc6845_device> m_crtc;
+ required_device<z80sio_device> m_uart;
+ required_device<com8116_device> m_brg;
+ required_device<beep_device> m_beep;
+ required_device<timer_device> m_beep_timer;
+ required_device<msm5832_device> m_rtc;
+ required_device<mb8876_device> m_fdc;
+ required_device<floppy_connector> m_floppy0;
+ required_device<floppy_connector> m_floppy1;
+ required_device<floppy_connector> m_floppy2;
+ required_device<floppy_connector> m_floppy3;
+ required_ioport_array<8> m_io_keyboard;
+// optional_device<ram_device> m_mainram;
+};
+
+
+void max80_state::mem_map(address_map &map)
+{
+ map(0x0000, 0xffff).ram();
+ map(0x0000, 0x01ff).rom();
+ //map(0x3800, 0x3bff).r(FUNC(max80_state::keyboard_r));
+ //map(0x3c00, 0x3fff).ram().share(m_p_videoram);
+ map(0x07d0, 0x07d3).w(m_brg, FUNC(com8116_device::str_w)); // W0
+ map(0x07d4, 0x07d7).w(m_brg, FUNC(com8116_device::stt_w)); // W1
+ map(0x07d8, 0x07db).w(FUNC(max80_state::drive_w)); // W2
+ map(0x07dc, 0x07df).w(FUNC(max80_state::mode_w)); // 0x30 to move 4k area to 3000-3FFF //W3
+ map(0x07e0, 0x07e0).mirror(2).w(m_crtc, FUNC(mc6845_device::address_w)); // OUT 0
+ map(0x07e1, 0x07e1).mirror(2).w(m_crtc, FUNC(mc6845_device::register_w)); // OUT 0
+ map(0x07e4, 0x07e7).rw(m_uart, FUNC(z80sio_device::ba_cd_r), FUNC(z80sio_device::ba_cd_w)); // IN1,OUT1
+ map(0x07ec, 0x07ef).rw(m_fdc, FUNC(mb8876_device::read), FUNC(mb8876_device::write)); // IN3,OUT3
+ //map(0x07f0, 0x07f3).r // udata
+ map(0x07f4, 0x07f7).r(FUNC(max80_state::fdc_status_r));
+ map(0x07f8, 0x07fb).portr("BOOT"); // IN6
+ map(0x07f8, 0x07fb).w(FUNC(max80_state::beep_w));
+ map(0x07fc, 0x07ff).rw(m_pio, FUNC(z80pio_device::read_alt), FUNC(z80pio_device::write_alt)); // IN7,OUT7
+}
+
+static INPUT_PORTS_START( max80 )
+ PORT_START("LINE0")
+ PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("@") PORT_CODE(KEYCODE_INSERT) 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(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("[") PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR('{')
+ PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("\\") PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('|')
+ PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("]") PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(']') PORT_CHAR('}')
+ PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_NAME("^") PORT_CODE(KEYCODE_TILDE) PORT_CHAR('^') PORT_CHAR('~')
+ PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("_") PORT_CODE(KEYCODE_DEL) PORT_CHAR('_') PORT_CHAR(127)
+
+ PORT_START("LINE4")
+ PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CODE(KEYCODE_0_PAD) PORT_CHAR('0')
+ PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CODE(KEYCODE_1_PAD) PORT_CHAR('1') PORT_CHAR('!')
+ PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CODE(KEYCODE_2_PAD) PORT_CHAR('2') PORT_CHAR('"')
+ PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CODE(KEYCODE_3_PAD) PORT_CHAR('3') PORT_CHAR('#')
+ PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_CODE(KEYCODE_4_PAD) PORT_CHAR('4') PORT_CHAR('$')
+ PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CODE(KEYCODE_5_PAD) PORT_CHAR('5') PORT_CHAR('%')
+ PORT_BIT(0x40, 0x00, IPT_KEYBOARD) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CODE(KEYCODE_6_PAD) PORT_CHAR('6') PORT_CHAR('&')
+ PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CODE(KEYCODE_7_PAD) PORT_CHAR('7') PORT_CHAR('\'')
+
+ PORT_START("LINE5")
+ PORT_BIT(0x01, 0x00, IPT_KEYBOARD) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CODE(KEYCODE_8_PAD) PORT_CHAR('8') PORT_CHAR('(')
+ PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CODE(KEYCODE_9_PAD) 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_CODE(KEYCODE_DEL_PAD) 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))
+ 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(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("F1") PORT_CODE(KEYCODE_F1)
+ PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("F2") PORT_CODE(KEYCODE_F2)
+ PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("F3") PORT_CODE(KEYCODE_F3)
+ PORT_BIT(0x10, 0x00, IPT_KEYBOARD) PORT_NAME("F4") PORT_CODE(KEYCODE_F4)
+ PORT_BIT(0x20, 0x00, IPT_KEYBOARD) PORT_NAME("ESC") PORT_CODE(KEYCODE_ESC)
+ PORT_BIT(0x40, 0x00, IPT_UNUSED)
+ PORT_BIT(0x80, 0x00, IPT_KEYBOARD) PORT_NAME("CTL") PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_SHIFT_2)
+
+ PORT_START("BOOT") // lower 3 dips decide the boot device. Other 5 dips are unknown. Manual shows them all set low.
+ PORT_DIPNAME( 0x07, 0x02, "Boot device")
+ PORT_DIPSETTING( 0x00, "None")
+ PORT_DIPSETTING( 0x01, "Floppy 5")
+ PORT_DIPSETTING( 0x02, "Floppy 8")
+ PORT_DIPSETTING( 0x03, "HD 5 UVC")
+ PORT_DIPSETTING( 0x04, "HD 8 UVC")
+ PORT_DIPSETTING( 0x05, "FD 5 UVC")
+ PORT_DIPSETTING( 0x06, "FD 8 UVC")
+ PORT_DIPSETTING( 0x07, "HD SASI")
+ PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_UNKNOWN )
+ PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_UNKNOWN )
+ PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_UNKNOWN )
+ PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_UNKNOWN )
+ PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_UNKNOWN )
+INPUT_PORTS_END
+
+
+/*************************************
+ *
+ * Port handlers.
+ *
+ *************************************/
+
+
+TIMER_DEVICE_CALLBACK_MEMBER(max80_state::beep_timer)
+{
+ m_beep->set_state(0);
+}
+
+void max80_state::drive_w(offs_t offset, u8 data)
+{
+ m_floppy = nullptr;
+
+ if (BIT(data, 0)) m_floppy = m_floppy0->get_device();
+ if (BIT(data, 1)) m_floppy = m_floppy1->get_device();
+ if (BIT(data, 2)) m_floppy = m_floppy2->get_device();
+ if (BIT(data, 3)) m_floppy = m_floppy3->get_device();
+
+ m_fdc->set_floppy(m_floppy);
+
+ if (m_floppy)
+ {
+ m_floppy->mon_w(0);
+ m_floppy->ss_w(BIT(data, 4));
+ }
+
+ m_fdc->dden_w(!BIT(data, 6));
+ m_fdc->set_unscaled_clock(BIT(data, 5) ? 2000000 : 1000000);
+ m_allow_nmi = BIT(data, 7);
+}
+
+
+WRITE_LINE_MEMBER(max80_state::intrq_w)
+{
+ m_fdc_int = state;
+}
+
+WRITE_LINE_MEMBER(max80_state::drq_w)
+{
+ m_fdc_drq = state;
+ m_maincpu->set_input_line(INPUT_LINE_NMI, (state && m_allow_nmi) ? ASSERT_LINE : CLEAR_LINE);
+}
+
+u8 max80_state::keyboard_r(offs_t offset)
+{
+ u8 i, result = 0;
+
+ for (i = 0; i < 8; i++)
+ if (BIT(offset, i))
+ result |= m_io_keyboard[i]->read();
+
+ return result;
+}
+
+u8 max80_state::fdc_status_r(offs_t offset)
+{
+ u8 data = 0xfc | m_fdc_drq | (m_fdc_int << 1);
+ return data;
+}
+
+void max80_state::beep_w(offs_t offset, u8 data)
+{
+ m_beep->set_state(1);
+ m_beep_timer->adjust(attotime::from_msec(150));
+}
+
+void max80_state::mode_w(offs_t offset, u8 data)
+{
+ // bit 0, disable rom
+ // bit 1, disable i/o
+ // bit 2, enable video access from cpu
+ // bit 3, enable wide characters
+ // bits 4-7, move rom and i/o to the block starting with x000, where x = BIT(data,4,4)
+ m_mode = data;
+}
+
+u8 max80_state::pio_pa_r(offs_t offset)
+{
+ return m_rtc->data_r();
+}
+
+void max80_state::pio_pa_w(offs_t offset, u8 data)
+{
+ m_rtc->data_w(data & 15);
+ // Memory banking of the 64k rams
+ // if subsequent memory address of >=0x8000, bits 6/7 are used, else bits 4/5.
+ // High bit switches 64k banks. Low bit does something with 32k, but not sure what.
+}
+
+void max80_state::pio_pb_w(offs_t offset, u8 data)
+{
+ m_rtc->address_w(data & 15);
+ m_rtc->write_w(BIT(data, 4));
+ m_rtc->read_w(BIT(data, 5));
+ m_rtc->hold_w(BIT(data, 6));
+}
+
+/*************************************
+ * Machine *
+ *************************************/
+
+void max80_state::machine_start()
+{
+// save_item(NAME(m_irq));
+// save_item(NAME(m_size_store));
+// save_item(NAME(m_drq_off));
+// save_item(NAME(m_intrq_off));
+
+}
+
+void max80_state::machine_reset()
+{
+ m_size_store = 0xff;
+ m_fdc_drq = false;
+ m_fdc_int = false;
+ m_floppy = nullptr;
+}
+
+MC6845_UPDATE_ROW( max80_state::crtc_update_row )
+{
+#if 0
+ 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) & 0x7ff;
+ u8 chr = m_vram[mem];
+ u8 gfx = m_p_chargen[(chr<<4) | ra] ^ ((x == cursor_x) ? 0xff : 0);
+
+ /* Display a scanline of a character (8 pixels) */
+ *p++ = palette[BIT(gfx, 7)];
+ *p++ = palette[BIT(gfx, 6)];
+ *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)];
+ }
+#endif
+}
+
+
+void max80_state::floppy_formats(format_registration &fr)
+{
+ fr.add(FLOPPY_IMD_FORMAT);
+ //fr.add(FLOPPY_JV3_FORMAT);
+ //fr.add(FLOPPY_DMK_FORMAT);
+ //fr.add(FLOPPY_JV1_FORMAT);
+}
+
+static void max80_floppies(device_slot_interface &device)
+{
+ // Available images get rejected with 40-track drives
+ //device.option_add("40t_sd", FLOPPY_525_SSSD);
+ //device.option_add("40t_dd", FLOPPY_525_DD);
+ device.option_add("80t_qd", FLOPPY_525_QD);
+ device.option_add("8ssdd", FLOPPY_8_SSDD);
+ device.option_add("8dsdd", FLOPPY_8_DSDD);
+}
+
+
+void max80_state::max80(machine_config &config)
+{
+ /* basic machine hardware */
+ Z80(config, m_maincpu, 15'200'000 / 3);
+ m_maincpu->set_addrmap(AS_PROGRAM, &max80_state::mem_map);
+
+ /* video hardware */
+ screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER, rgb_t::green()));
+ screen.set_refresh_hz(60);
+ screen.set_vblank_time(ATTOSECONDS_IN_USEC(2000)); // not accurate
+ screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update));
+ screen.set_size(640, 480);
+ screen.set_visarea(0, 639, 0, 479);
+
+ PALETTE(config, m_palette, palette_device::MONOCHROME);
+
+ HD6845S(config, m_crtc, 15'200'000 / 8); // HD46505
+ 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(max80_state::crtc_update_row));
+
+ // devices
+ MB8876(config, m_fdc, 8_MHz_XTAL / 4);
+ m_fdc->intrq_wr_callback().set(FUNC(max80_state::intrq_w));
+ m_fdc->drq_wr_callback().set(FUNC(max80_state::drq_w));
+ FLOPPY_CONNECTOR(config, "fdc:0", max80_floppies, "8ssdd", max80_state::floppy_formats).enable_sound(true);
+ FLOPPY_CONNECTOR(config, "fdc:1", max80_floppies, nullptr, max80_state::floppy_formats).enable_sound(true);
+ FLOPPY_CONNECTOR(config, "fdc:2", max80_floppies, nullptr, max80_state::floppy_formats).enable_sound(true);
+ FLOPPY_CONNECTOR(config, "fdc:3", max80_floppies, nullptr, max80_state::floppy_formats).enable_sound(true);
+
+ Z80PIO(config, m_pio, 15'200'000 / 3);
+ m_pio->in_pa_callback().set(FUNC(max80_state::pio_pa_r));
+ m_pio->out_pa_callback().set(FUNC(max80_state::pio_pa_w));
+ m_pio->out_pb_callback().set(FUNC(max80_state::pio_pb_w));
+
+ COM8116(config, m_brg, 5'068'800); // A few gates wired up as an oscillator. Frequency guessed.
+ m_brg->fr_handler().set(m_uart, FUNC(z80sio_device::rxca_w));
+ m_brg->ft_handler().set(m_uart, FUNC(z80sio_device::rxcb_w));
+
+ MSM5832(config, m_rtc, 32.768_kHz_XTAL);
+
+ Z80SIO(config, m_uart, 15'200'000 / 3);
+
+ /* sound hardware */
+ SPEAKER(config, "mono").front_center();
+ BEEP(config, m_beep, 800).add_route(ALL_OUTPUTS, "mono", 0.50);
+ TIMER(config, m_beep_timer).configure_generic(FUNC(max80_state::beep_timer));
+}
+
+
+/***************************************************************************
+
+ Game driver(s)
+
+***************************************************************************/
+
+
+ROM_START(max80)
+ ROM_REGION(0x0200, "maincpu",0)
+ ROM_LOAD("max80.e12", 0x0000, 0x0200, CRC(cf316f25) SHA1(78663711c6100a67ef18382284565feda2bbbf77) )
+ROM_END
+
+// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
+COMP( 1982, max80, 0, trs80l2, max80, max80, max80_state, empty_init, "Lobo Systems", "MAX-80", MACHINE_NOT_WORKING ) //| MACHINE_SUPPORTS_SAVE )
diff --git a/src/mame/mame.lst b/src/mame/mame.lst
index 2db33289ab1..a31a6c0930c 100644
--- a/src/mame/mame.lst
+++ b/src/mame/mame.lst
@@ -20393,6 +20393,9 @@ matrix //
@source:mattelchess.cpp
mchess
+@source:max80.cpp
+max80
+
@source:maxaflex.cpp
maxaflex //
mf_achas // (c) 1982 Exidy / First Star Software
diff --git a/src/mame/mess.flt b/src/mame/mess.flt
index a5acf920536..d1a2b699539 100644
--- a/src/mame/mess.flt
+++ b/src/mame/mess.flt
@@ -553,6 +553,7 @@ macquadra700.cpp
magiceyes_pollux_vr3520f.cpp
magnum.cpp
mattelchess.cpp
+max80.cpp
mbc020.cpp
mbc200.cpp
mbc55x.cpp