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-rw-r--r--src/mame/drivers/mx2178.cpp202
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diff --git a/src/mame/drivers/mx2178.cpp b/src/mame/drivers/mx2178.cpp
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index 50deae97975..00000000000
--- a/src/mame/drivers/mx2178.cpp
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-// license:BSD-3-Clause
-// copyright-holders:Robbbert
-/***************************************************************************************************
-
-Skeleton driver for Memorex 2178
-
-Chips: Z80A, N8X305N, 2x B8452A, 4x D4016C-3, 2x HD468A50P, HD46505SP-1
-Crystal: 18.8696MHz
-There is a large piezo-beeper.
-
-TODO:
-- Connect up the beeper
-- Unknown memory i/o C000, 4000
-- Need schematic / tech manual
-- Doesn't seem to be any dips, looks like all settings and modes are controlled by keystrokes.
-- 8X305 is a 16-bit bipolar processor which appears to use four external PROMs (undumped). It
- would communicate with the Z80 via a common 8-bit I/O bus. No idea what it is used for here,
- but in another system it acts as the floppy disk controller.
-- Debug trick: set pc=809 to see the test menu.
-- It shows the status line but keystrokes are ignored. After 20 minutes of inactivity, the screen
- goes blank. Pressing a key will restore it.
-
-***************************************************************************************************/
-
-#include "emu.h"
-#include "cpu/z80/z80.h"
-//#include "cpu/8x300/8x300.h" // device = N8X300
-#include "machine/6850acia.h"
-#include "bus/rs232/rs232.h"
-#include "machine/clock.h"
-#include "video/mc6845.h"
-#include "emupal.h"
-#include "screen.h"
-
-
-class mx2178_state : public driver_device
-{
-public:
- mx2178_state(const machine_config &mconfig, device_type type, const char *tag)
- : driver_device(mconfig, type, tag)
- , m_palette(*this, "palette")
- , m_p_videoram(*this, "videoram")
- , m_maincpu(*this, "maincpu")
- , m_p_chargen(*this, "chargen")
- { }
-
- void mx2178(machine_config &config);
-
-private:
- MC6845_UPDATE_ROW(crtc_update_row);
-
- void mx2178_io(address_map &map);
- void mx2178_mem(address_map &map);
-
- virtual void machine_reset() override;
- required_device<palette_device> m_palette;
- required_shared_ptr<u8> m_p_videoram;
- required_device<z80_device> m_maincpu;
- required_region_ptr<u8> m_p_chargen;
-};
-
-void mx2178_state::mx2178_mem(address_map &map)
-{
- map.unmap_value_high();
- map(0x0000, 0x1fff).rom().region("roms", 0);
- map(0x2000, 0x27ff).ram().share("videoram");
- map(0x6000, 0x6fff).ram();
- map(0xe000, 0xe7ff).ram();
-}
-
-void mx2178_state::mx2178_io(address_map &map)
-{
- map.global_mask(0xff);
- map(0x00, 0x00).rw("crtc", FUNC(mc6845_device::status_r), FUNC(mc6845_device::address_w));
- map(0x01, 0x01).rw("crtc", FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w));
- map(0x80, 0x81).rw("acia1", FUNC(acia6850_device::read), FUNC(acia6850_device::write));
- map(0xa0, 0xa1).rw("acia2", FUNC(acia6850_device::read), FUNC(acia6850_device::write));
-}
-
-
-/* Input ports */
-static INPUT_PORTS_START( mx2178 )
-INPUT_PORTS_END
-
-MC6845_UPDATE_ROW( mx2178_state::crtc_update_row )
-{
- const rgb_t *pens = m_palette->palette()->entry_list_raw();
- uint8_t chr,gfx;
- uint16_t mem,x;
- uint32_t *p = &bitmap.pix32(y);
-
- for (x = 0; x < x_count; x++)
- {
- mem = (ma + x) & 0x7ff;
- chr = m_p_videoram[mem];
-
- /* get pattern of pixels for that character scanline */
- gfx = m_p_chargen[(chr<<4) | ra] ^ ((x == cursor_x) ? 0xff : 0);
-
- /* Display a scanline of a character (8 pixels) */
- *p++ = pens[BIT(gfx, 7)];
- *p++ = pens[BIT(gfx, 6)];
- *p++ = pens[BIT(gfx, 5)];
- *p++ = pens[BIT(gfx, 4)];
- *p++ = pens[BIT(gfx, 3)];
- *p++ = pens[BIT(gfx, 2)];
- *p++ = pens[BIT(gfx, 1)];
- *p++ = pens[BIT(gfx, 0)];
- }
-}
-
-/* F4 Character Displayer */
-static const gfx_layout mx2178_charlayout =
-{
- 8, 16, /* 8 x 16 characters */
- 256, /* 256 characters */
- 1, /* 1 bits per pixel */
- { 0 }, /* no bitplanes */
- /* x offsets */
- { 0, 1, 2, 3, 4, 5, 6, 7 },
- /* y offsets */
- { 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8, 11*8, 12*8, 13*8 },
- 8*16 /* every char takes 8 bytes */
-};
-
-static GFXDECODE_START( gfx_mx2178 )
- GFXDECODE_ENTRY( "chargen", 0x0000, mx2178_charlayout, 0, 1 )
-GFXDECODE_END
-
-void mx2178_state::machine_reset()
-{
-}
-
-void mx2178_state::mx2178(machine_config &config)
-{
- /* basic machine hardware */
- Z80(config, m_maincpu, XTAL(18'869'600) / 5); // guess
- m_maincpu->set_addrmap(AS_PROGRAM, &mx2178_state::mx2178_mem);
- m_maincpu->set_addrmap(AS_IO, &mx2178_state::mx2178_io);
-
- /* 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(2500)); // not correct
- screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update));
- screen.set_size(32*8, 32*8);
- screen.set_visarea(0*8, 32*8-1, 2*8, 30*8-1);
- GFXDECODE(config, "gfxdecode", m_palette, gfx_mx2178);
- PALETTE(config, m_palette, palette_device::MONOCHROME);
-
- /* Devices */
- mc6845_device &crtc(MC6845(config, "crtc", XTAL(18'869'600) / 8)); // clk unknown
- crtc.set_screen("screen");
- crtc.set_show_border_area(false);
- crtc.set_char_width(8);
- crtc.set_update_row_callback(FUNC(mx2178_state::crtc_update_row));
- crtc.out_vsync_callback().set_inputline(m_maincpu, INPUT_LINE_NMI);
-
- clock_device &acia_clock(CLOCK(config, "acia_clock", XTAL(18'869'600) / 30));
- acia_clock.signal_handler().set("acia1", FUNC(acia6850_device::write_txc));
- acia_clock.signal_handler().append("acia1", FUNC(acia6850_device::write_rxc));
- acia_clock.signal_handler().append("acia2", FUNC(acia6850_device::write_txc));
- acia_clock.signal_handler().append("acia2", FUNC(acia6850_device::write_rxc));
-
- acia6850_device &acia1(ACIA6850(config, "acia1", 0));
- acia1.txd_handler().set("rs232a", FUNC(rs232_port_device::write_txd));
- acia1.rts_handler().set("rs232a", FUNC(rs232_port_device::write_rts));
- acia1.irq_handler().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
-
- rs232_port_device &rs232a(RS232_PORT(config, "rs232a", default_rs232_devices, nullptr));
- rs232a.rxd_handler().set("acia1", FUNC(acia6850_device::write_rxd));
- rs232a.cts_handler().set("acia1", FUNC(acia6850_device::write_cts));
-
- acia6850_device &acia2(ACIA6850(config, "acia2", 0));
- acia2.txd_handler().set("rs232b", FUNC(rs232_port_device::write_txd));
- acia2.rts_handler().set("rs232b", FUNC(rs232_port_device::write_rts));
- acia2.irq_handler().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
-
- rs232_port_device &rs232b(RS232_PORT(config, "rs232b", default_rs232_devices, "keyboard"));
- rs232b.rxd_handler().set("acia2", FUNC(acia6850_device::write_rxd));
- rs232b.cts_handler().set("acia2", FUNC(acia6850_device::write_cts));
-}
-
-/* ROM definition */
-ROM_START( mx2178 )
- ROM_REGION(0x2000, "roms", 0) // MBM2764-25
- ROM_LOAD( "96274139.u9", 0x000000, 0x002000, CRC(eb471a27) SHA1(433abefd1a72653d0bf35bcaaeccf9943b96260b) )
-
- ROM_REGION(0x800, "proms", 0) // MB7122E - actual mapping not known
- ROMX_LOAD( "96270350.q2", 0x0000, 0x0400, NO_DUMP, ROM_NIBBLE | ROM_SHIFT_NIBBLE_LO | ROM_SKIP(1) )
- ROMX_LOAD( "96270368.r2", 0x0000, 0x0400, NO_DUMP, ROM_NIBBLE | ROM_SHIFT_NIBBLE_HI | ROM_SKIP(1) )
- ROMX_LOAD( "96270376.s2", 0x0001, 0x0400, NO_DUMP, ROM_NIBBLE | ROM_SHIFT_NIBBLE_LO | ROM_SKIP(1) )
- ROMX_LOAD( "96270384.t2", 0x0001, 0x0400, NO_DUMP, ROM_NIBBLE | ROM_SHIFT_NIBBLE_HI | ROM_SKIP(1) )
-
- ROM_REGION(0x1000, "chargen", 0) // D2732A-3
- ROM_LOAD( "96273883.c7", 0x000000, 0x001000, CRC(8311fadd) SHA1(573bbad23e893ad9374edc929642dc1cba3452d2) )
-ROM_END
-
-/* Driver */
-
-// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
-COMP( 1984, mx2178, 0, 0, mx2178, mx2178, mx2178_state, empty_init, "Memorex", "Memorex 2178", MACHINE_IS_SKELETON )