// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
/***************************************************************************
Driver for Casio PV-1000
***************************************************************************/
#include "emu.h"
#include "cpu/z80/z80.h"
#include "bus/generic/slot.h"
#include "bus/generic/carts.h"
#include "emupal.h"
#include "screen.h"
#include "softlist.h"
#include "speaker.h"
// PV-1000 Sound device
class pv1000_sound_device : public device_t,
public device_sound_interface
{
public:
pv1000_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
DECLARE_WRITE8_MEMBER(voice_w);
protected:
// device-level overrides
virtual void device_start() override;
// sound stream update overrides
virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
private:
// internal state
struct
{
uint32_t count;
uint16_t period;
uint8_t val;
} m_voice[4];
sound_stream *m_sh_channel;
};
DEFINE_DEVICE_TYPE(PV1000, pv1000_sound_device, "pv1000_sound", "NEC D65010G031")
pv1000_sound_device::pv1000_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, PV1000, tag, owner, clock)
, device_sound_interface(mconfig, *this)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void pv1000_sound_device::device_start()
{
m_sh_channel = machine().sound().stream_alloc(*this, 0, 1, clock() / 1024);
save_item(NAME(m_voice[0].count));
save_item(NAME(m_voice[0].period));
save_item(NAME(m_voice[0].val));
save_item(NAME(m_voice[1].count));
save_item(NAME(m_voice[1].period));
save_item(NAME(m_voice[1].val));
save_item(NAME(m_voice[2].count));
save_item(NAME(m_voice[2].period));
save_item(NAME(m_voice[2].val));
// are these ever used?
save_item(NAME(m_voice[3].count));
save_item(NAME(m_voice[3].period));
save_item(NAME(m_voice[3].val));
}
WRITE8_MEMBER(pv1000_sound_device::voice_w)
{
offset &= 0x03;
m_voice[offset].period = data;
}
//-------------------------------------------------
// sound_stream_update - handle a stream update
//-------------------------------------------------
/*
plgDavid's audio implementation/analysis notes:
Sound appears to be 3 50/50 pulse voices made by cutting the main clock by 1024,
then by the value of the 6bit period registers.
This creates a surprisingly accurate pitch range.
Note: the register periods are inverted.
*/
void pv1000_sound_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples)
{
stream_sample_t *buffer = outputs[0];
while (samples > 0)
{
*buffer=0;
for (int i = 0; i < 3; i++)
{
uint32_t per = (0x3f - (m_voice[i].period & 0x3f));
if (per != 0) //OFF!
*buffer += m_voice[i].val * 8192;
m_voice[i].count++;
if (m_voice[i].count >= per)
{
m_voice[i].count = 0;
m_voice[i].val = !m_voice[i].val;
}
}
buffer++;
samples--;
}
}
// PV-1000 System
class pv1000_state : public driver_device
{
public:
pv1000_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_sound(*this, "pv1000_sound"),
m_cart(*this, "cartslot"),
m_p_videoram(*this, "videoram"),
m_gfxdecode(*this, "gfxdecode"),
m_screen(*this, "screen"),
m_palette(*this, "palette")
{ }
void pv1000(machine_config &config);
private:
DECLARE_WRITE8_MEMBER(io_w);
DECLARE_READ8_MEMBER(io_r);
DECLARE_WRITE8_MEMBER(gfxram_w);
uint8_t m_io_regs[8];
uint8_t m_fd_data;
emu_timer *m_irq_on_timer;
emu_timer *m_irq_off_timer;
uint8_t m_pcg_bank;
uint8_t m_force_pattern;
uint8_t m_fd_buffer_flag;
uint8_t m_border_col;
uint8_t * m_gfxram;
void pv1000_postload();
required_device<cpu_device> m_maincpu;
required_device<pv1000_sound_device> m_sound;
required_device<generic_slot_device> m_cart;
required_shared_ptr<uint8_t> m_p_videoram;
virtual void machine_start() override;
virtual void machine_reset() override;
uint32_t screen_update_pv1000(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
TIMER_CALLBACK_MEMBER(d65010_irq_on_cb);
TIMER_CALLBACK_MEMBER(d65010_irq_off_cb);
DECLARE_DEVICE_IMAGE_LOAD_MEMBER( pv1000_cart );
required_device<gfxdecode_device> m_gfxdecode;
required_device<screen_device> m_screen;
required_device<palette_device> m_palette;
void pv1000(address_map &map);
void pv1000_io(address_map &map);
};
void pv1000_state::pv1000(address_map &map)
{
//AM_RANGE(0x0000, 0x7fff) // mapped by the cartslot
map(0xb800, 0xbbff).ram().share("videoram");
map(0xbc00, 0xbfff).ram().w(FUNC(pv1000_state::gfxram_w)).region("gfxram", 0);
}
void pv1000_state::pv1000_io(address_map &map)
{
map.global_mask(0xff);
map(0xf8, 0xff).rw(FUNC(pv1000_state::io_r), FUNC(pv1000_state::io_w));
}
WRITE8_MEMBER( pv1000_state::gfxram_w )
{
uint8_t *gfxram = memregion( "gfxram" )->base();
gfxram[ offset ] = data;
m_gfxdecode->gfx(1)->mark_dirty(offset/32);
}
WRITE8_MEMBER( pv1000_state::io_w )
{
switch (offset)
{
case 0x00:
case 0x01:
case 0x02:
//logerror("io_w offset=%02x, data=%02x (%03d)\n", offset, data , data);
m_sound->voice_w(space, offset, data);
break;
case 0x03:
//currently unknown use
break;
case 0x05:
m_fd_data = 0xf;
break;
// case 0x06 VRAM + PCG location, always fixed at 0xb8xx
case 0x07:
/* ---- -xxx unknown, border color? */
m_pcg_bank = (data & 0x20) >> 5;
m_force_pattern = ((data & 0x10) >> 4); /* Dig Dug relies on this */
m_border_col = data & 7;
break;
}
m_io_regs[offset] = data;
}
READ8_MEMBER( pv1000_state::io_r )
{
uint8_t data = m_io_regs[offset];
// logerror("io_r offset=%02x\n", offset );
switch ( offset )
{
case 0x04:
/* Bit 1 = 1 => Data is available in port FD */
/* Bit 0 = 1 => Buffer at port FD is empty */
data = 0;
data = m_fd_buffer_flag & 1;
data |= m_fd_data ? 2 : 0;
m_fd_buffer_flag &= ~1;
break;
case 0x05:
static const char *const joynames[] = { "IN0", "IN1", "IN2", "IN3" };
data = 0;
for (int i = 0; i < 4; i++)
{
if (m_io_regs[5] & 1 << i)
{
data |= ioport(joynames[i])->read();
m_fd_data &= ~(1 << i);
}
}
//m_fd_data = 0;
break;
}
return data;
}
static INPUT_PORTS_START( pv1000 )
PORT_START( "IN0" )
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_SELECT ) PORT_PLAYER(1)
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_START ) PORT_PLAYER(1)
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_SELECT ) PORT_PLAYER(2)
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_START ) PORT_PLAYER(2)
PORT_START( "IN1" )
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_PLAYER(1) PORT_8WAY
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(1) PORT_8WAY
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2) PORT_8WAY
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2) PORT_8WAY
PORT_START( "IN2" )
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_PLAYER(1) PORT_8WAY
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_PLAYER(1) PORT_8WAY
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2) PORT_8WAY
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_PLAYER(2) PORT_8WAY
PORT_START( "IN3" )
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_PLAYER(1)
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_PLAYER(1)
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_PLAYER(2)
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_PLAYER(2)
INPUT_PORTS_END
DEVICE_IMAGE_LOAD_MEMBER( pv1000_state, pv1000_cart )
{
uint32_t size = m_cart->common_get_size("rom");
if (size != 0x2000 && size != 0x4000)
{
image.seterror(IMAGE_ERROR_UNSPECIFIED, "Unsupported cartridge size");
return image_init_result::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_result::PASS;
}
uint32_t pv1000_state::screen_update_pv1000(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int x, y;
bitmap.fill(m_border_col); // TODO: might be either black or colored by this register
for ( y = 0; y < 24; y++ )
{
for ( x = 2; x < 30; x++ ) // left-right most columns are definitely masked by the border color
{
uint16_t tile = m_p_videoram[ y * 32 + x ];
if ( tile < 0xe0 || m_force_pattern )
{
tile += ( m_pcg_bank << 8);
m_gfxdecode->gfx(0)->opaque(bitmap,cliprect, tile, 0, 0, 0, x*8, y*8 );
}
else
{
tile -= 0xe0;
m_gfxdecode->gfx(1)->opaque(bitmap,cliprect, tile, 0, 0, 0, x*8, y*8 );
}
}
}
return 0;
}
/* Interrupt is triggering 16 times during vblank. */
/* we have chosen to trigger on scanlines 195, 199, 203, 207, 211, 215, 219, 223, 227, 231, 235, 239, 243, 247, 251, 255 */
TIMER_CALLBACK_MEMBER(pv1000_state::d65010_irq_on_cb)
{
int vpos = m_screen->vpos();
int next_vpos = vpos + 4;
if(vpos == 195)
m_fd_buffer_flag |= 1; /* TODO: exact timing of this */
/* Set IRQ line and schedule release of IRQ line */
m_maincpu->set_input_line(0, ASSERT_LINE );
m_irq_off_timer->adjust( m_screen->time_until_pos(vpos, 380/2 ) );
/* Schedule next IRQ trigger */
if ( vpos >= 255 )
{
next_vpos = 195;
}
m_irq_on_timer->adjust( m_screen->time_until_pos(next_vpos, 0 ) );
}
TIMER_CALLBACK_MEMBER(pv1000_state::d65010_irq_off_cb)
{
m_maincpu->set_input_line(0, CLEAR_LINE );
}
void pv1000_state::pv1000_postload()
{
// restore GFX ram
for (int i = 0; i < 0x400; i++)
gfxram_w(m_maincpu->space(AS_PROGRAM), i, m_gfxram[i]);
}
void pv1000_state::machine_start()
{
m_irq_on_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(pv1000_state::d65010_irq_on_cb),this));
m_irq_off_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(pv1000_state::d65010_irq_off_cb),this));
m_gfxram = memregion("gfxram")->base();
save_pointer(NAME(m_gfxram), 0x400);
if (m_cart->exists())
{
m_maincpu->space(AS_PROGRAM).install_read_handler(0x0000, 0x7fff, read8_delegate(FUNC(generic_slot_device::read_rom),(generic_slot_device*)m_cart));
// FIXME: this is needed for gfx decoding, but there is probably a cleaner solution!
std::string region_tag;
memcpy(memregion("gfxrom")->base(), memregion(region_tag.assign(m_cart->tag()).append(GENERIC_ROM_REGION_TAG).c_str())->base(), m_cart->get_rom_size());
}
save_item(NAME(m_io_regs));
save_item(NAME(m_fd_data));
save_item(NAME(m_pcg_bank));
save_item(NAME(m_force_pattern));
save_item(NAME(m_fd_buffer_flag));
save_item(NAME(m_border_col));
machine().save().register_postload(save_prepost_delegate(FUNC(pv1000_state::pv1000_postload), this));
}
void pv1000_state::machine_reset()
{
m_io_regs[5] = 0;
m_fd_data = 0;
m_irq_on_timer->adjust(m_screen->time_until_pos(195, 0));
m_irq_off_timer->adjust(attotime::never);
}
static const gfx_layout pv1000_3bpp_gfx =
{
8, 8, /* 8x8 characters */
RGN_FRAC(1,1),
3,
{ 0, 8*8, 16*8 },
{ 0, 1, 2, 3, 4, 5, 6, 7 },
{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
8*8*4
};
static GFXDECODE_START( gfx_pv1000 )
GFXDECODE_ENTRY( "gfxrom", 8, pv1000_3bpp_gfx, 0, 8 )
GFXDECODE_ENTRY( "gfxram", 8, pv1000_3bpp_gfx, 0, 8 )
GFXDECODE_END
MACHINE_CONFIG_START(pv1000_state::pv1000)
MCFG_DEVICE_ADD( "maincpu", Z80, 17897725/5 )
MCFG_DEVICE_PROGRAM_MAP( pv1000 )
MCFG_DEVICE_IO_MAP( pv1000_io )
/* D65010G031 - Video & sound chip */
MCFG_SCREEN_ADD( "screen", RASTER )
MCFG_SCREEN_RAW_PARAMS( 17897725/3, 380, 0, 256, 262, 0, 192 )
MCFG_SCREEN_UPDATE_DRIVER(pv1000_state, screen_update_pv1000)
MCFG_SCREEN_PALETTE("palette")
MCFG_PALETTE_ADD_3BIT_BGR("palette")
MCFG_DEVICE_ADD("gfxdecode", GFXDECODE, "palette", gfx_pv1000 )
SPEAKER(config, "mono").front_center();
MCFG_DEVICE_ADD( "pv1000_sound", PV1000, 17897725 )
MCFG_SOUND_ROUTE( ALL_OUTPUTS, "mono", 1.00 )
/* Cartridge slot */
MCFG_GENERIC_CARTSLOT_ADD("cartslot", generic_linear_slot, "pv1000_cart")
MCFG_GENERIC_MANDATORY
MCFG_GENERIC_LOAD(pv1000_state, pv1000_cart)
/* Software lists */
MCFG_SOFTWARE_LIST_ADD("cart_list","pv1000")
MACHINE_CONFIG_END
ROM_START( pv1000 )
ROM_REGION( 0x4000, "gfxrom", ROMREGION_ERASE00 )
ROM_REGION( 0x400, "gfxram", ROMREGION_ERASE00 )
ROM_END
/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
CONS( 1983, pv1000, 0, 0, pv1000, pv1000, pv1000_state, empty_init, "Casio", "PV-1000", MACHINE_SUPPORTS_SAVE )