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-rw-r--r--src/mame/drivers/a2600.cpp513
1 files changed, 0 insertions, 513 deletions
diff --git a/src/mame/drivers/a2600.cpp b/src/mame/drivers/a2600.cpp
deleted file mode 100644
index 723ea2600fa..00000000000
--- a/src/mame/drivers/a2600.cpp
+++ /dev/null
@@ -1,513 +0,0 @@
-// license:BSD-3-Clause
-// copyright-holders:Nathan Woods, Wilbert Pol
-/***************************************************************************
-
- Atari VCS 2600 driver
-
-TODO:
-- Move the 2 32-in-1 rom dumps into their own driver
-- Add 128-in-1 driver
-
-***************************************************************************/
-
-// the new RIOT does not work with the SuperCharger
-// for example "mame a2600 scharger -cass offifrog" fails to load after playing the tape
-
-#include "emu.h"
-
-#include "includes/a2600.h"
-
-#include "emupal.h"
-#include "screen.h"
-#include "softlist.h"
-#include "speaker.h"
-
-
-static constexpr auto MASTER_CLOCK_NTSC = 3.579575_MHz_XTAL;
-static constexpr auto MASTER_CLOCK_PAL = 3.546894_MHz_XTAL;
-
-static const uint16_t supported_screen_heights[4] = { 262, 312, 328, 342 };
-
-
-void a2600_base_state::a2600_mem(address_map &map) // 6507 has 13-bit address space, 0x0000 - 0x1fff
-{
- map(0x0000, 0x007f).mirror(0x0f00).rw(m_tia, FUNC(tia_video_device::read), FUNC(tia_video_device::write));
- map(0x0080, 0x00ff).mirror(0x0d00).ram().share("riot_ram");
-#if USE_NEW_RIOT
- map(0x0280, 0x029f).mirror(0x0d00).m("riot", FUNC(mos6532_t::io_map));
-#else
- map(0x0280, 0x029f).mirror(0x0d00).rw("riot", FUNC(riot6532_device::read), FUNC(riot6532_device::write));
-#endif
- // map(0x1000, 0x1fff) is cart data and it is configured at reset time, depending on the mounted cart!
-}
-
-
-uint8_t a2600_state::cart_over_all_r(address_space &space, offs_t offset)
-{
- if (!machine().side_effects_disabled())
- m_cart->write_bank(space, offset, 0);
-
- int masked_offset = offset &~ 0x0d00;
- uint8_t ret = 0x00;
-
- if (masked_offset < 0x80)
- {
- ret = m_tia->read(masked_offset&0x7f);
- }
- else if (masked_offset < 0x100)
- {
- ret = m_riot_ram[masked_offset & 0x7f];
- }
- /* 0x100 - 0x1ff already masked out */
- else if (masked_offset < 0x280)
- {
- ret = m_tia->read(masked_offset&0x7f);
- }
- else if (masked_offset < 0x2a0)
- {
-#if USE_NEW_RIOT
- ret = m_riot->io_r(masked_offset);
-#else
- ret = m_riot->read(masked_offset);
-#endif
- }
- else if (masked_offset < 0x300)
- {
- /* 0x2a0 - 0x2ff nothing? */
- }
- /* 0x300 - 0x3ff already masked out */
-
- return ret;
-}
-
-void a2600_state::cart_over_all_w(address_space &space, offs_t offset, uint8_t data)
-{
- m_cart->write_bank(space, offset, 0);
-
- int masked_offset = offset &~ 0x0d00;
-
- if (masked_offset < 0x80)
- {
- m_tia->write(masked_offset & 0x7f, data);
- }
- else if (masked_offset < 0x100)
- {
- m_riot_ram[masked_offset & 0x7f] = data;
- }
- /* 0x100 - 0x1ff already masked out */
- else if (masked_offset < 0x280)
- {
- m_tia->write(masked_offset & 0x7f, data);
- }
- else if (masked_offset < 0x2a0)
- {
-#if USE_NEW_RIOT
- m_riot->io_w(masked_offset, data);
-#else
- m_riot->write(masked_offset, data);
-#endif
- }
- else if (masked_offset < 0x300)
- {
- /* 0x2a0 - 0x2ff nothing? */
- }
- /* 0x300 - 0x3ff already masked out */
-}
-
-void a2600_base_state::switch_A_w(uint8_t data)
-{
- /* Left controller port */
- m_joy1->joy_w( data >> 4 );
-
- /* Right controller port */
- m_joy2->joy_w( data & 0x0f );
-
-// switch( ioport("CONTROLLERS")->read() % 16 )
-// {
-// case 0x0a: /* KidVid voice module */
-// m_cassette->change_state(( data & 0x02 ) ? CASSETTE_MOTOR_DISABLED : (CASSETTE_MOTOR_ENABLED | CASSETTE_PLAY), CASSETTE_MOTOR_DISABLED );
-// break;
-// }
-}
-
-uint8_t a2600_base_state::switch_A_r()
-{
- uint8_t val = 0;
-
- // Left controller port PINs 1-4 ( 4321 )
- val |= (m_joy1->read_joy() & 0x0f) << 4;
-
- // Right controller port PINs 1-4 ( 4321 )
- val |= m_joy2->read_joy() & 0x0f;
-
- return val;
-}
-
-void a2600_base_state::switch_B_w(uint8_t data)
-{
-}
-
-WRITE_LINE_MEMBER(a2600_base_state::irq_callback)
-{
-}
-
-uint16_t a2600_base_state::a2600_read_input_port(offs_t offset)
-{
- switch (offset)
- {
- case 0: // Left controller port PIN 5
- return m_joy1->read_pot_x();
-
- case 1: // Left controller port PIN 9
- return m_joy1->read_pot_y();
-
- case 2: // Right controller port PIN 5
- return m_joy2->read_pot_x();
-
- case 3: // Right controller port PIN 9
- return m_joy2->read_pot_y();
-
- case 4: // Left controller port PIN 6
- return (m_joy1->read_joy() & 0x20) ? 0xff : 0x7f;
-
- case 5: // Right controller port PIN 6
- return (m_joy2->read_joy() & 0x20) ? 0xff : 0x7f;
- }
- return 0xff;
-}
-
-/* There are a few games that do an LDA ($80-$FF),Y instruction.
- The contents off the databus then depend on whatever was read
- from the RAM. To do this really properly the 6502 core would
- need to keep track of the last databus contents so we can query
- that. For now this is a quick hack to determine that value anyway.
- Examples:
- Q-Bert's Qubes (NTSC,F6) at 0x1594
- Berzerk at 0xF093.
-*/
-uint8_t a2600_base_state::a2600_get_databus_contents(offs_t offset)
-{
- uint16_t last_address, prev_address;
- uint8_t last_byte, prev_byte;
- address_space& prog_space = m_maincpu->space(AS_PROGRAM);
-
- last_address = m_maincpu->pc() + 1;
- if ( ! ( last_address & 0x1080 ) )
- {
- return offset;
- }
- last_byte = prog_space.read_byte(last_address );
- if ( last_byte < 0x80 || last_byte == 0xFF )
- {
- return last_byte;
- }
- prev_address = last_address - 1;
- if ( ! ( prev_address & 0x1080 ) )
- {
- return last_byte;
- }
- prev_byte = prog_space.read_byte(prev_address );
- if ( prev_byte == 0xB1 )
- { /* LDA (XX),Y */
- return prog_space.read_byte(last_byte + 1 );
- }
- return last_byte;
-}
-
-#if 0
-static const rectangle visarea[4] = {
- { 26, 26 + 160 + 16, 24, 24 + 192 + 31 }, /* 262 */
- { 26, 26 + 160 + 16, 32, 32 + 228 + 31 }, /* 312 */
- { 26, 26 + 160 + 16, 45, 45 + 240 + 31 }, /* 328 */
- { 26, 26 + 160 + 16, 48, 48 + 240 + 31 } /* 342 */
-};
-#endif
-
-void a2600_base_state::a2600_tia_vsync_callback(uint16_t data)
-{
- for ( int i = 0; i < std::size(supported_screen_heights); i++ )
- {
- if ( data >= supported_screen_heights[i] - 3 && data <= supported_screen_heights[i] + 3 )
- {
- if ( supported_screen_heights[i] != m_current_screen_height )
- {
- m_current_screen_height = supported_screen_heights[i];
-// m_screen->configure(228, m_current_screen_height, &visarea[i], HZ_TO_ATTOSECONDS( MASTER_CLOCK_NTSC ) * 228 * m_current_screen_height );
- }
- }
- }
-}
-
-void a2600_base_state::a2600_tia_vsync_callback_pal(uint16_t data)
-{
- for ( int i = 0; i < std::size(supported_screen_heights); i++ )
- {
- if ( data >= supported_screen_heights[i] - 3 && data <= supported_screen_heights[i] + 3 )
- {
- if ( supported_screen_heights[i] != m_current_screen_height )
- {
- m_current_screen_height = supported_screen_heights[i];
-// m_screen->configure(228, m_current_screen_height, &visarea[i], HZ_TO_ATTOSECONDS( MASTER_CLOCK_PAL ) * 228 * m_current_screen_height );
- }
- }
- }
-}
-
-// TODO: is this the correct behavior for the real hardware?!?
-uint8_t a2600_state::cart_over_riot_r(address_space &space, offs_t offset)
-{
- if (!machine().side_effects_disabled())
- m_cart->write_bank(space, offset, 0);
- return m_riot_ram[0x20 + offset];
-}
-
-void a2600_state::cart_over_riot_w(address_space &space, offs_t offset, uint8_t data)
-{
- m_cart->write_bank(space, offset, 0);
- m_riot_ram[0x20 + offset] = data;
-
-}
-
-void a2600_state::cart_over_tia_w(address_space &space, offs_t offset, uint8_t data)
-{
- // Both Cart & TIA see these addresses
- m_cart->write_bank(space, offset, data);
- m_tia->write(offset, data);
-}
-
-void a2600_base_state::machine_start()
-{
- m_current_screen_height = m_screen->height();
- memset(m_riot_ram, 0x00, 0x80);
-
- save_item(NAME(m_current_screen_height));
-}
-
-void a2600_state::machine_start()
-{
- a2600_base_state::machine_start();
-
- switch (m_cart->get_cart_type())
- {
- case A26_2K:
- case A26_4K:
- case A26_F4:
- case A26_F8:
- case A26_F8SW:
- case A26_FA:
- case A26_E0:
- case A26_E7:
- case A26_CV:
- case A26_DC:
- case A26_FV:
- case A26_8IN1:
- m_maincpu->space(AS_PROGRAM).install_read_handler(0x1000, 0x1fff, read8sm_delegate(*m_cart, FUNC(vcs_cart_slot_device::read_rom)));
- m_maincpu->space(AS_PROGRAM).install_write_handler(0x1000, 0x1fff, write8m_delegate(*m_cart, FUNC(vcs_cart_slot_device::write_bank)));
- break;
- case A26_F6:
- case A26_DPC:
- m_maincpu->space(AS_PROGRAM).install_read_handler(0x1000, 0x1fff, read8sm_delegate(*m_cart, FUNC(vcs_cart_slot_device::read_rom)));
- m_maincpu->space(AS_PROGRAM).install_write_handler(0x1000, 0x1fff, write8m_delegate(*m_cart, FUNC(vcs_cart_slot_device::write_bank)));
- break;
- case A26_FE:
- m_maincpu->space(AS_PROGRAM).install_readwrite_handler(0x1000, 0x1fff, read8sm_delegate(*m_cart, FUNC(vcs_cart_slot_device::read_rom)), write8sm_delegate(*m_cart, FUNC(vcs_cart_slot_device::write_ram)));
- m_maincpu->space(AS_PROGRAM).install_read_handler(0x01fe, 0x01ff, read8m_delegate(*m_cart, FUNC(vcs_cart_slot_device::read_bank)));
- m_maincpu->space(AS_PROGRAM).install_write_handler(0x01fe, 0x01fe, write8m_delegate(*m_cart, FUNC(vcs_cart_slot_device::write_bank)));
- break;
- case A26_3E:
- m_maincpu->space(AS_PROGRAM).install_readwrite_handler(0x1000, 0x1fff, read8sm_delegate(*m_cart, FUNC(vcs_cart_slot_device::read_rom)), write8sm_delegate(*m_cart, FUNC(vcs_cart_slot_device::write_ram)));
- m_maincpu->space(AS_PROGRAM).install_write_handler(0x00, 0x3f, write8m_delegate(*this, FUNC(a2600_state::cart_over_tia_w)));
- break;
- case A26_3F:
- m_maincpu->space(AS_PROGRAM).install_read_handler(0x1000, 0x1fff, read8sm_delegate(*m_cart, FUNC(vcs_cart_slot_device::read_rom)));
- m_maincpu->space(AS_PROGRAM).install_write_handler(0x00, 0x3f, write8m_delegate(*this, FUNC(a2600_state::cart_over_tia_w)));
- break;
- case A26_UA:
- m_maincpu->space(AS_PROGRAM).install_read_handler(0x1000, 0x1fff, read8sm_delegate(*m_cart, FUNC(vcs_cart_slot_device::read_rom)));
- m_maincpu->space(AS_PROGRAM).install_readwrite_handler(0x200, 0x27f, read8m_delegate(*m_cart, FUNC(vcs_cart_slot_device::read_bank)), write8m_delegate(*m_cart, FUNC(vcs_cart_slot_device::write_bank)));
- break;
- case A26_JVP:
- m_maincpu->space(AS_PROGRAM).install_read_handler(0x1000, 0x1fff, read8sm_delegate(*m_cart, FUNC(vcs_cart_slot_device::read_rom)));
- m_maincpu->space(AS_PROGRAM).install_write_handler(0x1000, 0x1fff, write8m_delegate(*m_cart, FUNC(vcs_cart_slot_device::write_bank)));
- // to verify the actual behavior...
- m_maincpu->space(AS_PROGRAM).install_readwrite_handler(0xfa0, 0xfc0, read8m_delegate(*this, FUNC(a2600_state::cart_over_riot_r)), write8m_delegate(*this, FUNC(a2600_state::cart_over_riot_w)));
- break;
- case A26_4IN1:
- case A26_32IN1:
- m_maincpu->space(AS_PROGRAM).install_read_handler(0x1000, 0x1fff, read8sm_delegate(*m_cart, FUNC(vcs_cart_slot_device::read_rom)));
- break;
- case A26_SS:
- m_maincpu->space(AS_PROGRAM).install_read_handler(0x1000, 0x1fff, read8sm_delegate(*m_cart, FUNC(vcs_cart_slot_device::read_rom)));
- break;
- case A26_CM:
- m_maincpu->space(AS_PROGRAM).install_read_handler(0x1000, 0x1fff, read8sm_delegate(*m_cart, FUNC(vcs_cart_slot_device::read_rom)));
- break;
- case A26_X07:
- m_maincpu->space(AS_PROGRAM).install_read_handler(0x1000, 0x1fff, read8sm_delegate(*m_cart, FUNC(vcs_cart_slot_device::read_rom)));
- m_maincpu->space(AS_PROGRAM).install_write_handler(0x1000, 0x1fff, write8m_delegate(*m_cart, FUNC(vcs_cart_slot_device::write_bank)));
- m_maincpu->space(AS_PROGRAM).install_readwrite_handler(0x0000, 0x0fff, read8m_delegate(*this, FUNC(a2600_state::cart_over_all_r)), write8m_delegate(*this, FUNC(a2600_state::cart_over_all_w)));
- break;
- case A26_HARMONY:
- m_maincpu->space(AS_PROGRAM).install_read_handler(0x1000, 0x1fff, read8sm_delegate(*m_cart, FUNC(vcs_cart_slot_device::read_rom)));
- m_maincpu->space(AS_PROGRAM).install_write_handler(0x1000, 0x1fff, write8m_delegate(*m_cart, FUNC(vcs_cart_slot_device::write_bank)));
- break;
- }
-}
-
-
-static INPUT_PORTS_START( a2600 )
- PORT_START("SWB")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME("Reset Game") PORT_CODE(KEYCODE_2)
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME("Select Game") PORT_CODE(KEYCODE_1)
- PORT_BIT ( 0x04, IP_ACTIVE_LOW, IPT_UNUSED )
- PORT_DIPNAME( 0x08, 0x08, "TV Type" ) PORT_CODE(KEYCODE_C) PORT_TOGGLE
- PORT_DIPSETTING( 0x08, "Color" )
- PORT_DIPSETTING( 0x00, "B&W" )
- PORT_BIT ( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
- PORT_BIT ( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
- PORT_DIPNAME( 0x40, 0x00, "Left Diff. Switch" ) PORT_CODE(KEYCODE_3) PORT_TOGGLE
- PORT_DIPSETTING( 0x40, "A" )
- PORT_DIPSETTING( 0x00, "B" )
- PORT_DIPNAME( 0x80, 0x00, "Right Diff. Switch" ) PORT_CODE(KEYCODE_4) PORT_TOGGLE
- PORT_DIPSETTING( 0x80, "A" )
- PORT_DIPSETTING( 0x00, "B" )
-INPUT_PORTS_END
-
-
-static void a2600_cart(device_slot_interface &device)
-{
- device.option_add("a26_2k", A26_ROM_2K);
- device.option_add("a26_4k", A26_ROM_4K);
- device.option_add("a26_f4", A26_ROM_F4);
- device.option_add("a26_f6", A26_ROM_F6);
- device.option_add("a26_f8", A26_ROM_F8);
- device.option_add("a26_f8sw", A26_ROM_F8_SW);
- device.option_add("a26_fa", A26_ROM_FA);
- device.option_add("a26_fe", A26_ROM_FE);
- device.option_add("a26_3e", A26_ROM_3E);
- device.option_add("a26_3f", A26_ROM_3F);
- device.option_add("a26_e0", A26_ROM_E0);
- device.option_add("a26_e7", A26_ROM_E7);
- device.option_add("a26_ua", A26_ROM_UA);
- device.option_add("a26_cv", A26_ROM_CV);
- device.option_add("a26_dc", A26_ROM_DC);
- device.option_add("a26_fv", A26_ROM_FV);
- device.option_add("a26_jvp", A26_ROM_JVP);
- device.option_add("a26_cm", A26_ROM_COMPUMATE);
- device.option_add("a26_ss", A26_ROM_SUPERCHARGER);
- device.option_add("a26_dpc", A26_ROM_DPC);
- device.option_add("a26_4in1", A26_ROM_4IN1);
- device.option_add("a26_8in1", A26_ROM_8IN1);
- device.option_add("a26_32in1", A26_ROM_32IN1);
- device.option_add("a26_x07", A26_ROM_X07);
- device.option_add("a26_harmony", A26_ROM_HARMONY);
-}
-
-void a2600_state::a2600_cartslot(machine_config &config)
-{
- VCS_CART_SLOT(config, "cartslot", a2600_cart, nullptr);
-
- /* software lists */
- SOFTWARE_LIST(config, "cart_list").set_original("a2600");
- SOFTWARE_LIST(config, "cass_list").set_original("a2600_cass");
-}
-
-void a2600_state::a2600(machine_config &config)
-{
- /* basic machine hardware */
- M6507(config, m_maincpu, MASTER_CLOCK_NTSC / 3);
- m_maincpu->set_addrmap(AS_PROGRAM, &a2600_state::a2600_mem);
-
- /* video hardware */
- TIA_NTSC_VIDEO(config, m_tia, 0, "tia");
- m_tia->read_input_port_callback().set(FUNC(a2600_state::a2600_read_input_port));
- m_tia->databus_contents_callback().set(FUNC(a2600_state::a2600_get_databus_contents));
- m_tia->vsync_callback().set(FUNC(a2600_state::a2600_tia_vsync_callback));
-
- SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
- m_screen->set_raw(MASTER_CLOCK_NTSC, 228, 26, 26 + 160 + 16, 262, 24 , 24 + 192 + 31);
- m_screen->set_screen_update("tia_video", FUNC(tia_video_device::screen_update));
-
- /* sound hardware */
- SPEAKER(config, "mono").front_center();
- TIA(config, "tia", MASTER_CLOCK_NTSC/114).add_route(ALL_OUTPUTS, "mono", 0.90);
-
- /* devices */
-#if USE_NEW_RIOT
- MOS6532_NEW(config, m_riot, MASTER_CLOCK_NTSC / 3);
- m_riot->pa_rd_callback().set(FUNC(a2600_state::switch_A_r));
- m_riot->pa_wr_callback().set(FUNC(a2600_state::switch_A_w));
- m_riot->pb_rd_callback().set_ioport("SWB");
- m_riot->pb_wr_callback().set(FUNC(a2600_state::switch_B_w));
- m_riot->irq_wr_callback().set(FUNC(a2600_state::irq_callback));
-#else
- RIOT6532(config, m_riot, MASTER_CLOCK_NTSC / 3);
- m_riot->in_pa_callback().set(FUNC(a2600_state::switch_A_r));
- m_riot->out_pa_callback().set(FUNC(a2600_state::switch_A_w));
- m_riot->in_pb_callback().set_ioport("SWB");
- m_riot->out_pb_callback().set(FUNC(a2600_state::switch_B_w));
- m_riot->irq_callback().set(FUNC(a2600_state::irq_callback));
-#endif
-
- VCS_CONTROL_PORT(config, CONTROL1_TAG, vcs_control_port_devices, "joy");
- VCS_CONTROL_PORT(config, CONTROL2_TAG, vcs_control_port_devices, nullptr);
-
- a2600_cartslot(config);
- subdevice<software_list_device>("cart_list")->set_filter("NTSC");
-}
-
-
-void a2600_state::a2600p(machine_config &config)
-{
- /* basic machine hardware */
- M6507(config, m_maincpu, MASTER_CLOCK_PAL / 3);
- m_maincpu->set_addrmap(AS_PROGRAM, &a2600_state::a2600_mem);
-
- /* video hardware */
- TIA_PAL_VIDEO(config, m_tia, 0, "tia");
- m_tia->read_input_port_callback().set(FUNC(a2600_state::a2600_read_input_port));
- m_tia->databus_contents_callback().set(FUNC(a2600_state::a2600_get_databus_contents));
- m_tia->vsync_callback().set(FUNC(a2600_state::a2600_tia_vsync_callback_pal));
-
- SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
- m_screen->set_raw(MASTER_CLOCK_PAL, 228, 26, 26 + 160 + 16, 312, 32, 32 + 228 + 31);
- m_screen->set_screen_update("tia_video", FUNC(tia_video_device::screen_update));
-
- /* sound hardware */
- SPEAKER(config, "mono").front_center();
- TIA(config, "tia", MASTER_CLOCK_PAL/114).add_route(ALL_OUTPUTS, "mono", 0.90);
-
- /* devices */
-#if USE_NEW_RIOT
- MOS6532_NEW(config, m_riot, MASTER_CLOCK_PAL / 3);
- m_riot->pa_rd_callback().set(FUNC(a2600_state::switch_A_r));
- m_riot->pa_wr_callback().set(FUNC(a2600_state::switch_A_w));
- m_riot->pb_rd_callback().set_ioport("SWB");
- m_riot->pb_wr_callback().set(FUNC(a2600_state::switch_B_w));
- m_riot->irq_wr_callback().set(FUNC(a2600_state::irq_callback));
-#else
- RIOT6532(config, m_riot, MASTER_CLOCK_PAL / 3);
- m_riot->in_pa_callback().set(FUNC(a2600_state::switch_A_r));
- m_riot->out_pa_callback().set(FUNC(a2600_state::switch_A_w));
- m_riot->in_pb_callback().set_ioport("SWB");
- m_riot->out_pb_callback().set(FUNC(a2600_state::switch_B_w));
- m_riot->irq_callback().set(FUNC(a2600_state::irq_callback));
-#endif
-
- VCS_CONTROL_PORT(config, CONTROL1_TAG, vcs_control_port_devices, "joy");
- VCS_CONTROL_PORT(config, CONTROL2_TAG, vcs_control_port_devices, nullptr);
-
- a2600_cartslot(config);
- subdevice<software_list_device>("cart_list")->set_filter("PAL");
-}
-
-
-ROM_START( a2600 )
- ROM_REGION( 0x2000, "maincpu", ROMREGION_ERASEFF )
-ROM_END
-
-#define rom_a2600p rom_a2600
-
-/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME */
-CONS( 1977, a2600, 0, 0, a2600, a2600, a2600_state, empty_init, "Atari", "Atari 2600 (NTSC)" , MACHINE_SUPPORTS_SAVE )
-CONS( 1978, a2600p, a2600, 0, a2600p, a2600, a2600_state, empty_init, "Atari", "Atari 2600 (PAL)", MACHINE_SUPPORTS_SAVE )