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ca1b0f3d41
mame/src/mame/drivers/mc1000.cpp
Ivan Vangelista ca1b0f3d41 output_latch: removed MCFG macros (nw)
2019-01-29 18:03:29 +01:00

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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/***************************************************************************
MC 1000
12/05/2009 Skeleton driver.
http://ensjo.wikispaces.com/MC-1000+on+JEMU
http://ensjo.blogspot.com/2006/11/color-artifacting-no-mc-1000.html
****************************************************************************/
/*
TODO:
- xtal frequency?
- Z80 wait at 0x0000-0x1fff when !hsync & !vsync
- 80-column card (MC6845) character generator ROM
- Charlemagne / GEM-1000 / Junior Computer ROMs
*/
#include "emu.h"
#include "bus/centronics/ctronics.h"
#include "cpu/z80/z80.h"
#include "imagedev/cassette.h"
#include "machine/ram.h"
#include "machine/rescap.h"
#include "machine/timer.h"
#include "sound/ay8910.h"
#include "video/mc6845.h"
#include "video/mc6847.h"
#include "screen.h"
#include "softlist.h"
#include "speaker.h"
#define SCREEN_TAG "screen"
#define Z80_TAG "u13"
#define AY8910_TAG "u21"
#define MC6845_TAG "mc6845"
#define MC6847_TAG "u19"
#define CENTRONICS_TAG "centronics"
#define MC1000_MC6845_VIDEORAM_SIZE 0x800
#define MC1000_MC6847_VIDEORAM_SIZE 0x1800
class mc1000_state : public driver_device
{
public:
mc1000_state(const machine_config &mconfig, device_type type, const char *tag) :
driver_device(mconfig, type, tag),
m_maincpu(*this, Z80_TAG),
m_vdg(*this, MC6847_TAG),
m_crtc(*this, MC6845_TAG),
m_centronics(*this, CENTRONICS_TAG),
m_cassette(*this, "cassette"),
m_ram(*this, RAM_TAG),
m_rom(*this, Z80_TAG),
m_mc6845_video_ram(*this, "mc6845_vram"),
m_mc6847_video_ram(*this, "mc6847_vram"),
m_y(*this, "Y%u", 0),
m_joy(*this, "JOY%u", 0),
m_modifiers(*this, "MODIFIERS"),
m_joykeymap(*this, "JOYKEYMAP%u", 0)
{ }
void mc1000(machine_config &config);
private:
required_device<cpu_device> m_maincpu;
required_device<mc6847_base_device> m_vdg;
optional_device<mc6845_device> m_crtc;
required_device<centronics_device> m_centronics;
required_device<cassette_image_device> m_cassette;
required_device<ram_device> m_ram;
required_memory_region m_rom;
required_shared_ptr<uint8_t> m_mc6845_video_ram;
required_shared_ptr<uint8_t> m_mc6847_video_ram;
required_ioport_array<8> m_y;
required_ioport_array<2> m_joy;
required_ioport m_modifiers;
required_ioport_array<2> m_joykeymap;
std::unique_ptr<uint8_t[]> m_banked_ram;
virtual void machine_start() override;
virtual void machine_reset() override;
DECLARE_READ8_MEMBER( printer_r );
DECLARE_WRITE8_MEMBER( printer_w );
DECLARE_WRITE8_MEMBER( mc6845_ctrl_w );
DECLARE_WRITE8_MEMBER( mc6847_attr_w );
DECLARE_WRITE_LINE_MEMBER( fs_w );
DECLARE_WRITE_LINE_MEMBER( hs_w );
DECLARE_READ8_MEMBER( videoram_r );
DECLARE_WRITE8_MEMBER( keylatch_w );
DECLARE_READ8_MEMBER( keydata_r );
DECLARE_READ8_MEMBER( rom_banking_r );
void bankswitch();
/* cpu state */
int m_ne555_int;
/* memory state */
int m_rom0000;
int m_mc6845_bank;
int m_mc6847_bank;
/* keyboard state */
int m_keylatch;
/* video state */
int m_hsync;
int m_vsync;
uint8_t m_mc6847_attr;
DECLARE_WRITE_LINE_MEMBER(write_centronics_busy);
int m_centronics_busy;
void init_mc1000();
TIMER_DEVICE_CALLBACK_MEMBER(ne555_tick);
void mc1000_banking_mem(address_map &map);
void mc1000_io(address_map &map);
void mc1000_mem(address_map &map);
};
/* Memory Banking */
void mc1000_state::bankswitch()
{
address_space &program = m_maincpu->space(AS_PROGRAM);
/* MC6845 video RAM */
membank("bank2")->set_entry(m_mc6845_bank);
/* extended RAM */
if (m_ram->size() > 16*1024)
{
program.install_readwrite_bank(0x4000, 0x7fff, "bank3");
}
else
{
program.unmap_readwrite(0x4000, 0x7fff);
}
/* MC6847 video RAM */
if (m_mc6847_bank)
{
if (m_ram->size() > 16*1024)
{
program.install_readwrite_bank(0x8000, 0x97ff, "bank4");
}
else
{
program.unmap_readwrite(0x8000, 0x97ff);
}
}
else
{
program.install_readwrite_bank(0x8000, 0x97ff, "bank4");
}
membank("bank4")->set_entry(m_mc6847_bank);
/* extended RAM */
if (m_ram->size() > 16*1024)
{
program.install_readwrite_bank(0x9800, 0xbfff, "bank5");
}
else
{
program.unmap_readwrite(0x9800, 0xbfff);
}
}
/* Read/Write Handlers */
WRITE_LINE_MEMBER( mc1000_state::write_centronics_busy )
{
m_centronics_busy = state;
}
READ8_MEMBER( mc1000_state::printer_r )
{
return m_centronics_busy;
}
WRITE8_MEMBER( mc1000_state::printer_w )
{
m_centronics->write_strobe(BIT(data, 0));
}
WRITE8_MEMBER( mc1000_state::mc6845_ctrl_w )
{
m_mc6845_bank = BIT(data, 0);
bankswitch();
}
WRITE8_MEMBER( mc1000_state::mc6847_attr_w )
{
/*
bit description
0 enable CPU video RAM access
1 CSS
2 GM0
3 GM1
4 GM2
5 _INT/EXT
6 _A/S
7 _A/G
*/
m_mc6847_bank = BIT(data, 0);
m_vdg->css_w(BIT(data, 1));
m_vdg->gm0_w(BIT(data, 2));
m_vdg->gm1_w(BIT(data, 3));
m_vdg->gm2_w(BIT(data, 4));
m_vdg->intext_w(BIT(data, 5));
m_vdg->as_w(BIT(data, 6));
m_vdg->ag_w(BIT(data, 7));
bankswitch();
}
/* Memory Maps */
void mc1000_state::mc1000_mem(address_map &map)
{
map(0x0000, 0x1fff).bankrw("bank1");
map(0x2000, 0x27ff).bankrw("bank2").share("mc6845_vram");
map(0x2800, 0x3fff).ram().share("ram2800");
map(0x4000, 0x7fff).bankrw("bank3");
map(0x8000, 0x97ff).bankrw("bank4").share("mc6847_vram");
map(0x9800, 0xbfff).bankrw("bank5");
map(0xc000, 0xffff).rom().region(Z80_TAG, 0);
}
void mc1000_state::mc1000_banking_mem(address_map &map)
{
map(0x0000, 0x1fff).bankrw("bank1");
map(0x2000, 0x27ff).bankrw("bank2").share("mc6845_vram");
map(0x2800, 0x3fff).ram().share("ram2800");
map(0x4000, 0x7fff).bankrw("bank3");
map(0x8000, 0x97ff).bankrw("bank4").share("mc6847_vram");
map(0x9800, 0xbfff).bankrw("bank5");
map(0xc000, 0xffff).r(FUNC(mc1000_state::rom_banking_r));
}
void mc1000_state::mc1000_io(address_map &map)
{
map.global_mask(0xff);
map(0x04, 0x04).rw(FUNC(mc1000_state::printer_r), FUNC(mc1000_state::printer_w));
map(0x05, 0x05).w("cent_data_out", FUNC(output_latch_device::bus_w));
// map(0x10, 0x10).w(m_crtc, FUNC(mc6845_device::address_w));
// map(0x11, 0x11).rw(m_crtc, FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w));
map(0x12, 0x12).w(FUNC(mc1000_state::mc6845_ctrl_w));
map(0x20, 0x20).w(AY8910_TAG, FUNC(ay8910_device::address_w));
map(0x40, 0x40).r(AY8910_TAG, FUNC(ay8910_device::data_r));
map(0x60, 0x60).w(AY8910_TAG, FUNC(ay8910_device::data_w));
map(0x80, 0x80).w(FUNC(mc1000_state::mc6847_attr_w));
}
/* Input Ports */
static INPUT_PORTS_START( mc1000 )
PORT_START("JOY0") /* Player 1 */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) /* = 'I' */
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) /* = 'Q' */
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) /* = 'Y' */
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) /* = '1' */
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 ) /* = '9' */
PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START("JOY1") /* Player 2 */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2) /* = '@' */
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(2) /* = 'H' */
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2) /* = 'P' */
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2) /* = 'X' */
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2) /* = '0' */
PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START("Y0")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('@')
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_H) PORT_CHAR('H')
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_P) PORT_CHAR('P')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_X) PORT_CHAR('X')
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(')
PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START("Y1")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('A')
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_I) PORT_CHAR('I')
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Q) PORT_CHAR('Q')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Y) PORT_CHAR('Y')
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')')
PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START("Y2")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('B')
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_J) PORT_CHAR('J')
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_R) PORT_CHAR('R')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Z) PORT_CHAR('Z')
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(':') PORT_CHAR('*')
PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START("Y3")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('C')
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_K) PORT_CHAR('K')
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_S) PORT_CHAR('S')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RETURN") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+')
PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START("Y4")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('D')
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_L) PORT_CHAR('L')
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_T) PORT_CHAR('T')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("SPACE") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')
PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START("Y5")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('E')
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_M) PORT_CHAR('M')
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_U) PORT_CHAR('U')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RUBOUT") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('=')
PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START("Y6")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('F')
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_N) PORT_CHAR('N')
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_V) PORT_CHAR('V')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('^')
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START("Y7")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_G) PORT_CHAR('G')
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_O) PORT_CHAR('O')
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_W) PORT_CHAR('W')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RESET")
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START("MODIFIERS")
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("SHIFT") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_MAMEKEY(RCONTROL))
PORT_START("JOYKEYMAP0")
PORT_CONFNAME( 0x01, 0x00, "JOYSTICK A (P1) keyboard mapping" )
PORT_CONFSETTING( 0x00, DEF_STR( Off ) )
PORT_CONFSETTING( 0x01, DEF_STR( On ) )
PORT_START("JOYKEYMAP1")
PORT_CONFNAME( 0x01, 0x00, "JOYSTICK B (P2) keyboard mapping" )
PORT_CONFSETTING( 0x00, DEF_STR( Off ) )
PORT_CONFSETTING( 0x01, DEF_STR( On ) )
INPUT_PORTS_END
/* Video */
WRITE_LINE_MEMBER( mc1000_state::fs_w )
{
m_vsync = state;
}
WRITE_LINE_MEMBER( mc1000_state::hs_w )
{
m_hsync = state;
}
READ8_MEMBER( mc1000_state::videoram_r )
{
if (offset == ~0) return 0xff;
m_vdg->inv_w(BIT(m_mc6847_video_ram[offset], 7));
return m_mc6847_video_ram[offset];
}
/* AY-3-8910 Interface */
WRITE8_MEMBER( mc1000_state::keylatch_w )
{
m_keylatch = data;
m_cassette->output(BIT(data, 7) ? -1.0 : +1.0);
}
READ8_MEMBER( mc1000_state::keydata_r )
{
uint8_t data = 0xff;
if (!BIT(m_keylatch, 0))
{
data &= m_y[0]->read();
if (m_joykeymap[1]->read()) data &= m_joy[1]->read();
}
if (!BIT(m_keylatch, 1))
{
data &= m_y[1]->read();
if (m_joykeymap[0]->read()) data &= m_joy[0]->read();
}
if (!BIT(m_keylatch, 2)) data &= m_y[2]->read();
if (!BIT(m_keylatch, 3)) data &= m_y[3]->read();
if (!BIT(m_keylatch, 4)) data &= m_y[4]->read();
if (!BIT(m_keylatch, 5)) data &= m_y[5]->read();
if (!BIT(m_keylatch, 6)) data &= m_y[6]->read();
if (!BIT(m_keylatch, 7)) data &= m_y[7]->read();
data = (m_modifiers->read() & 0xc0) | (data & 0x3f);
if ((m_cassette->get_state() & CASSETTE_MASK_UISTATE) == CASSETTE_PLAY)
{
if (m_cassette->input() >= +0.0) data &= 0x7f;
}
return data;
}
READ8_MEMBER( mc1000_state::rom_banking_r )
{
membank("bank1")->set_entry(0);
m_rom0000 = 0;
return m_rom->base()[offset];
}
/* Machine Initialization */
void mc1000_state::machine_start()
{
/* setup memory banking */
m_banked_ram = make_unique_clear<uint8_t[]>(0xc000);
membank("bank1")->configure_entry(0, m_banked_ram.get());
membank("bank1")->configure_entry(1, m_rom->base());
membank("bank1")->set_entry(1);
m_rom0000 = 1;
membank("bank2")->configure_entry(0, m_banked_ram.get() + 0x2000);
membank("bank2")->configure_entry(1, m_mc6845_video_ram);
membank("bank2")->set_entry(0);
membank("bank3")->configure_entry(0, m_banked_ram.get() + 0x4000);
membank("bank3")->set_entry(0);
membank("bank4")->configure_entry(0, m_mc6847_video_ram);
membank("bank4")->configure_entry(1, m_banked_ram.get() + 0x8000);
membank("bank4")->set_entry(0);
membank("bank5")->configure_entry(0, m_banked_ram.get() + 0x9800);
membank("bank5")->set_entry(0);
bankswitch();
/* register for state saving */
save_pointer(NAME(m_banked_ram), 0xc000);
save_item(NAME(m_rom0000));
save_item(NAME(m_mc6845_bank));
save_item(NAME(m_mc6847_bank));
save_item(NAME(m_keylatch));
save_item(NAME(m_hsync));
save_item(NAME(m_vsync));
}
void mc1000_state::machine_reset()
{
membank("bank1")->set_entry(1);
m_rom0000 = 1;
}
/* Machine Driver */
/*
Interrupt generator:
NE555 chip in astable circuit.
+---------*---*---o V+
| | |
+-+ | |
| |390K | |
| |R17 |8 |4
+-+ +-------+
| 7| |3
*-------| |-------> /INT (Z80)
| | |
| | |
+-+R16 2| IC 28 |
| |1K +--| |
| | | | 555 |
+-+ | | |
| | 6| |5
*----*--| |---+
| | | |
---C30 +-------+ ---C29
---10n |1 ---10n
_|_ _|_ _|_
/// /// ///
Calculated properties:
* 99.74489795918367 Duty Cycle Percentage
* 367.3469387755102 Frequency in Hertz
* 0.00000693 Seconds Low
* 0.00270963 Seconds High
*/
#define MC1000_NE555_FREQ (367) /* Hz */
#define MC1000_NE555_DUTY_CYCLE (99.745) /* % */
TIMER_DEVICE_CALLBACK_MEMBER(mc1000_state::ne555_tick)
{
// (m_ne555_int not needed anymore and can be done with?)
m_ne555_int = param;
m_maincpu->set_input_line(INPUT_LINE_IRQ0, param);
}
MACHINE_CONFIG_START(mc1000_state::mc1000)
/* basic machine hardware */
MCFG_DEVICE_ADD(Z80_TAG, Z80, 3579545)
MCFG_DEVICE_PROGRAM_MAP(mc1000_mem)
MCFG_DEVICE_OPCODES_MAP(mc1000_banking_mem)
MCFG_DEVICE_IO_MAP(mc1000_io)
/* timers */
timer_device &ne555clear(TIMER(config, "ne555clear"));
ne555clear.configure_periodic(FUNC(mc1000_state::ne555_tick), attotime::from_hz(MC1000_NE555_FREQ));
ne555clear.config_param(CLEAR_LINE);
timer_device &ne555assert(TIMER(config, "ne555assert"));
ne555assert.configure_periodic(FUNC(mc1000_state::ne555_tick), attotime::from_hz(MC1000_NE555_FREQ));
ne555assert.set_start_delay(attotime::from_hz(MC1000_NE555_FREQ * 100 / MC1000_NE555_DUTY_CYCLE));
ne555assert.config_param(ASSERT_LINE);
/* video hardware */
SCREEN(config, SCREEN_TAG, SCREEN_TYPE_RASTER);
MC6847_NTSC(config, m_vdg, XTAL(3'579'545));
m_vdg->hsync_wr_callback().set(FUNC(mc1000_state::hs_w));
m_vdg->fsync_wr_callback().set(FUNC(mc1000_state::fs_w));
m_vdg->input_callback().set(FUNC(mc1000_state::videoram_r));
m_vdg->set_screen(SCREEN_TAG);
/* sound hardware */
SPEAKER(config, "mono").front_center();
ay8910_device &ay8910(AY8910(config, AY8910_TAG, 3579545/2));
ay8910.set_flags(AY8910_SINGLE_OUTPUT);
ay8910.set_resistors_load(RES_K(2.2), 0, 0);
ay8910.port_b_read_callback().set(FUNC(mc1000_state::keydata_r));
ay8910.port_a_write_callback().set(FUNC(mc1000_state::keylatch_w));
ay8910.add_route(ALL_OUTPUTS, "mono", 0.25);
/* devices */
CASSETTE(config, m_cassette);
m_cassette->set_default_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED);
m_cassette->set_interface("mc1000_cass");
MCFG_SOFTWARE_LIST_ADD("cass_list", "mc1000_cass")
CENTRONICS(config, m_centronics, centronics_devices, "printer");
m_centronics->busy_handler().set(FUNC(mc1000_state::write_centronics_busy));
output_latch_device &latch(OUTPUT_LATCH(config, "cent_data_out"));
m_centronics->set_output_latch(latch);
/* internal ram */
RAM(config, RAM_TAG).set_default_size("16K").set_extra_options("48K");
MACHINE_CONFIG_END
/* ROMs */
ROM_START( mc1000 )
ROM_REGION( 0x4000, Z80_TAG, 0 )
ROM_LOAD( "mc1000.ic17", 0x0000, 0x2000, CRC(8e78d80d) SHA1(9480270e67a5db2e7de8bc5c8b9e0bb210d4142b) )
ROM_LOAD( "mc1000.ic12", 0x2000, 0x2000, CRC(750c95f0) SHA1(fd766f5ea4481ef7fd4df92cf7d8397cc2b5a6c4) )
ROM_END
/* System Drivers */
/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
COMP( 1985, mc1000, 0, 0, mc1000, mc1000, mc1000_state, empty_init, "CCE", "MC-1000", MACHINE_IMPERFECT_GRAPHICS | MACHINE_SUPPORTS_SAVE )
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