// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
/***************************************************************************
Nichibutsu My Vision
driver by Wilbert Pol
2013/12/01 Skeleton driver.
2013/12/02 Working driver.
Known issues:
- The inputs sometimes feel a bit unresponsive. Was the real unit like
that? Or is it just because we have incorrect clocks?
TODO:
- Review software list
- Add clickable artwork
- Verify sound chip model
- Verify exact TMS9918 model
- Verify clock crystal(s)
- Verify size of vram
****************************************************************************/
#include "emu.h"
#include "cpu/z80/z80.h"
#include "video/tms9928a.h"
#include "sound/ay8910.h"
#include "bus/generic/slot.h"
#include "bus/generic/carts.h"
#include "softlist.h"
class myvision_state : public driver_device
{
public:
myvision_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_cart(*this, "cartslot")
, m_io_row0(*this, "ROW0")
, m_io_row1(*this, "ROW1")
, m_io_row2(*this, "ROW2")
, m_io_row3(*this, "ROW3")
{ }
DECLARE_DEVICE_IMAGE_LOAD_MEMBER( cart );
DECLARE_READ8_MEMBER( ay_port_a_r );
DECLARE_READ8_MEMBER( ay_port_b_r );
DECLARE_WRITE8_MEMBER( ay_port_a_w );
DECLARE_WRITE8_MEMBER( ay_port_b_w );
private:
virtual void machine_start() override;
virtual void machine_reset() override;
required_device<cpu_device> m_maincpu;
required_device<generic_slot_device> m_cart;
UINT8 m_column;
required_ioport m_io_row0;
required_ioport m_io_row1;
required_ioport m_io_row2;
required_ioport m_io_row3;
};
static ADDRESS_MAP_START(myvision_mem, AS_PROGRAM, 8, myvision_state)
ADDRESS_MAP_UNMAP_HIGH
//AM_RANGE(0x0000, 0x5fff) // mapped by the cartslot
AM_RANGE(0xa000, 0xa7ff) AM_RAM
AM_RANGE(0xe000, 0xe000) AM_DEVREADWRITE("tms9918", tms9918a_device, vram_read, vram_write)
AM_RANGE(0xe002, 0xe002) AM_DEVREADWRITE("tms9918", tms9918a_device, register_read, register_write)
ADDRESS_MAP_END
static ADDRESS_MAP_START(myvision_io, AS_IO, 8, myvision_state)
ADDRESS_MAP_UNMAP_HIGH
ADDRESS_MAP_GLOBAL_MASK(0xff)
AM_RANGE(0x00, 0x00) AM_DEVWRITE("ay8910", ay8910_device, address_w)
AM_RANGE(0x01, 0x01) AM_DEVWRITE("ay8910", ay8910_device, data_w)
AM_RANGE(0x02, 0x02) AM_DEVREAD("ay8910", ay8910_device, data_r)
ADDRESS_MAP_END
/* Input ports */
/*
Keyboard layout is something like:
B
A D E
C
1 2 3 4 5 6 7 8 9 10 11 12 13 14
*/
static INPUT_PORTS_START( myvision )
PORT_START("ROW0")
PORT_BIT(0x07, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_MAHJONG_M) PORT_NAME("13")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN) PORT_NAME("C/Down")
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_MAHJONG_I) PORT_NAME("9")
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_MAHJONG_E) PORT_NAME("5")
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_MAHJONG_A) PORT_NAME("1")
PORT_START("ROW1")
PORT_BIT(0x07, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP) PORT_NAME("B/Up")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_MAHJONG_L) PORT_NAME("12")
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_MAHJONG_H) PORT_NAME("8")
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_MAHJONG_D) PORT_NAME("4")
PORT_START("ROW2")
PORT_BIT(0x07, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_MAHJONG_N) PORT_NAME("14/Start")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT) PORT_NAME("D/Right")
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_MAHJONG_J) PORT_NAME("10")
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_MAHJONG_F) PORT_NAME("6")
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_MAHJONG_B) PORT_NAME("2")
PORT_START("ROW3")
PORT_BIT(0x07, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT) PORT_NAME("A/Left")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_BUTTON1) PORT_NAME("E")
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_MAHJONG_K) PORT_NAME("11")
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_MAHJONG_G) PORT_NAME("7")
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_MAHJONG_C) PORT_NAME("3")
INPUT_PORTS_END
void myvision_state::machine_start()
{
if (m_cart->exists())
m_maincpu->space(AS_PROGRAM).install_read_handler(0x0000, 0x5fff, read8_delegate(FUNC(generic_slot_device::read_rom),(generic_slot_device*)m_cart));
save_item(NAME(m_column));
}
void myvision_state::machine_reset()
{
m_column = 0xff;
}
DEVICE_IMAGE_LOAD_MEMBER( myvision_state, cart )
{
UINT32 size = m_cart->common_get_size("rom");
if (size != 0x4000 && size != 0x6000)
{
image.seterror(IMAGE_ERROR_UNSPECIFIED, "Unsupported cartridge size");
return IMAGE_INIT_FAIL;
}
m_cart->rom_alloc(size, GENERIC_ROM8_WIDTH, ENDIANNESS_LITTLE);
m_cart->common_load_rom(m_cart->get_rom_base(), size, "rom");
return IMAGE_INIT_PASS;
}
READ8_MEMBER( myvision_state::ay_port_a_r )
{
UINT8 data = 0xFF;
if ( ! ( m_column & 0x80 ) )
{
data &= m_io_row0->read();
}
if ( ! ( m_column & 0x40 ) )
{
data &= m_io_row1->read();
}
if ( ! ( m_column & 0x20 ) )
{
data &= m_io_row2->read();
}
if ( ! ( m_column & 0x10 ) )
{
data &= m_io_row3->read();
}
return data;
}
READ8_MEMBER( myvision_state::ay_port_b_r )
{
return 0xff;
}
WRITE8_MEMBER( myvision_state::ay_port_a_w )
{
}
// Upper 4 bits select column
WRITE8_MEMBER( myvision_state::ay_port_b_w )
{
m_column = data;
}
static MACHINE_CONFIG_START( myvision, myvision_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu",Z80, XTAL_10_738635MHz/3) /* Not verified */
MCFG_CPU_PROGRAM_MAP(myvision_mem)
MCFG_CPU_IO_MAP(myvision_io)
/* video hardware */
MCFG_DEVICE_ADD( "tms9918", TMS9918A, XTAL_10_738635MHz / 2 ) /* Exact model not verified */
MCFG_TMS9928A_VRAM_SIZE(0x4000) /* Not verified */
MCFG_TMS9928A_OUT_INT_LINE_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
MCFG_TMS9928A_SCREEN_ADD_NTSC( "screen" )
MCFG_SCREEN_UPDATE_DEVICE( "tms9918", tms9918a_device, screen_update )
/* sound hardware */
MCFG_SPEAKER_STANDARD_MONO("mono")
MCFG_SOUND_ADD("ay8910", AY8910, XTAL_10_738635MHz/3/2) /* Exact model and clock not verified */
MCFG_AY8910_PORT_A_READ_CB(READ8(myvision_state, ay_port_a_r))
MCFG_AY8910_PORT_B_READ_CB(READ8(myvision_state, ay_port_b_r))
MCFG_AY8910_PORT_A_WRITE_CB(WRITE8(myvision_state, ay_port_a_w))
MCFG_AY8910_PORT_B_WRITE_CB(WRITE8(myvision_state, ay_port_b_w))
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
/* cartridge */
MCFG_GENERIC_CARTSLOT_ADD("cartslot", generic_plain_slot, "myvision_cart")
MCFG_GENERIC_LOAD(myvision_state, cart)
//MCFG_GENERIC_MANDATORY
/* software lists */
MCFG_SOFTWARE_LIST_ADD("cart_list","myvision")
MACHINE_CONFIG_END
/* ROM definition */
ROM_START( myvision )
ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
ROM_END
/* Driver */
/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
CONS( 1983, myvision, 0, 0, myvision, myvision, driver_device, 0, "Nichibutsu", "My Vision (KH-1000)", 0 )