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Diffstat (limited to 'src/mame/drivers/mx2178.cpp')
-rw-r--r-- | src/mame/drivers/mx2178.cpp | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/src/mame/drivers/mx2178.cpp b/src/mame/drivers/mx2178.cpp deleted file mode 100644 index 50deae97975..00000000000 --- a/src/mame/drivers/mx2178.cpp +++ /dev/null @@ -1,202 +0,0 @@ -// 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 ) |