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Diffstat (limited to 'src/mame/apple/superga2.cpp')
-rw-r--r-- | src/mame/apple/superga2.cpp | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/src/mame/apple/superga2.cpp b/src/mame/apple/superga2.cpp new file mode 100644 index 00000000000..7dc55e7cc0c --- /dev/null +++ b/src/mame/apple/superga2.cpp @@ -0,0 +1,244 @@ +// license:BSD-3-Clause +// copyright-holders:R. Belmont, Sergey Svishchev +/*************************************************************************** + + Nippel Super Games ][ + + An arcade board designed to run modified games from Apple ][. + Most of Apple hardware is missing, keyboard port is reused for joysticks. + + Only one game is known (a Mario Bros. hack/translation patch). + + Info: http://agatcomp.ru/Pravetz/SuperGames.shtml + + To do: + - verify palette, pixel and cpu clocks + - proper bootstrap (is there another ROM?) + +************************************************************************/ + +#include "emu.h" + +#include "apple2common.h" +#include "apple2video.h" + +#include "cpu/m6502/m6502.h" + +#include "machine/74259.h" +#include "machine/ram.h" +#include "machine/timer.h" + +#include "sound/spkrdev.h" + +#include "screen.h" +#include "speaker.h" + + +namespace { + +#define A2_CPU_TAG "maincpu" +#define A2_VIDEO_TAG "a2video" + +class superga2_state : public driver_device +{ +public: + superga2_state(const machine_config &mconfig, device_type type, const char *tag) + : driver_device(mconfig, type, tag) + , m_maincpu(*this, A2_CPU_TAG) + , m_screen(*this, "screen") + , m_ram(*this, RAM_TAG) + , m_video(*this, A2_VIDEO_TAG) + , m_a2common(*this, "a2common") + , m_speaker(*this, "speaker") + , m_softlatch(*this, "softlatch") + { } + + static constexpr feature_type imperfect_features() { return feature::PALETTE; } + + required_device<cpu_device> m_maincpu; + required_device<screen_device> m_screen; + required_device<ram_device> m_ram; + required_device<a2_video_device> m_video; + required_device<apple2_common_device> m_a2common; + required_device<speaker_sound_device> m_speaker; + required_device<addressable_latch_device> m_softlatch; + + virtual void machine_start() override ATTR_COLD; + virtual void machine_reset() override ATTR_COLD; + + uint8_t ram_r(offs_t offset); + void ram_w(offs_t offset, uint8_t data); + uint8_t speaker_toggle_r(); + void speaker_toggle_w(uint8_t data); + uint8_t switches_r(offs_t offset); + uint8_t reset_r(offs_t offset); + + void superga2(machine_config &config); + void superga2_map(address_map &map) ATTR_COLD; + +private: + int m_speaker_state = 0; + + uint8_t *m_ram_ptr = nullptr; + int m_ram_size = 0; + + uint8_t read_floatingbus(); +}; + +/*************************************************************************** + START/RESET +***************************************************************************/ + +void superga2_state::machine_start() +{ + m_ram_ptr = m_ram->pointer(); + m_ram_size = m_ram->size(); + m_speaker_state = 0; + m_speaker->level_w(m_speaker_state); + + // setup save states + save_item(NAME(m_speaker_state)); + + // setup video pointers + m_video->set_ram_pointers(m_ram_ptr, m_ram_ptr); + m_video->set_char_pointer(nullptr, 0); // no text modes on this machine +} + +void superga2_state::machine_reset() +{ + uint8_t *user1 = memregion("maincpu")->base(); + + memcpy(&m_ram_ptr[0x1100], user1, 0x8000); +} + +/*************************************************************************** + I/O +***************************************************************************/ + +uint8_t superga2_state::speaker_toggle_r() +{ + if (!machine().side_effects_disabled()) + speaker_toggle_w(0); + return read_floatingbus(); +} + +void superga2_state::speaker_toggle_w(uint8_t data) +{ + m_speaker_state ^= 1; + m_speaker->level_w(m_speaker_state); +} + +uint8_t superga2_state::switches_r(offs_t offset) +{ + if (!machine().side_effects_disabled()) + m_softlatch->write_bit((offset & 0x0e) >> 1, offset & 0x01); + return read_floatingbus(); +} + +uint8_t superga2_state::reset_r(offs_t offset) +{ + switch (offset) + { + case 0: case 2: return 0x00; break; + case 1: case 3: return 0x11; break; + } + return 0xff; +} + +uint8_t superga2_state::read_floatingbus() +{ + return 0xff; +} + +/*************************************************************************** + ADDRESS MAP +***************************************************************************/ + +uint8_t superga2_state::ram_r(offs_t offset) +{ + if (offset < m_ram_size) + { + return m_ram_ptr[offset]; + } + + return 0xff; +} + +void superga2_state::ram_w(offs_t offset, uint8_t data) +{ + if (offset < m_ram_size) + { + m_ram_ptr[offset] = data; + } +} + +void superga2_state::superga2_map(address_map &map) +{ + map(0x0000, 0xbfff).rw(FUNC(superga2_state::ram_r), FUNC(superga2_state::ram_w)); + map(0xc000, 0xc000).mirror(0xf).portr("P1").nopw(); + map(0xc030, 0xc030).mirror(0xf).rw(FUNC(superga2_state::speaker_toggle_r), FUNC(superga2_state::speaker_toggle_w)); + map(0xc050, 0xc05f).r(FUNC(superga2_state::switches_r)).w(m_softlatch, FUNC(addressable_latch_device::write_a0)); + map(0xfffc, 0xffff).r(FUNC(superga2_state::reset_r)); +} + +/*************************************************************************** + INPUT PORTS +***************************************************************************/ + +static INPUT_PORTS_START( superga2 ) + PORT_START("P1") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(1) + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(1) + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(2) + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(2) + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED ) + PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED ) + PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(2) + PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(1) +INPUT_PORTS_END + +void superga2_state::superga2(machine_config &config) +{ + /* basic machine hardware */ + M6502(config, m_maincpu, 1021800); + m_maincpu->set_addrmap(AS_PROGRAM, &superga2_state::superga2_map); + + APPLE2_VIDEO(config, m_video, XTAL(14'318'181)).set_screen(m_screen); + APPLE2_COMMON(config, m_a2common, XTAL(14'318'181)); + + SCREEN(config, m_screen, SCREEN_TYPE_RASTER); + m_screen->set_raw(1021800*14, (65*7)*2, 0, (40*7)*2, 262, 0, 192); + m_screen->set_screen_update(m_video, NAME((&a2_video_device::screen_update<a2_video_device::model::II, false, false>))); + m_screen->set_palette(m_video); + + /* sound hardware */ + SPEAKER(config, "mono").front_center(); + SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 1.00); + + /* soft switches */ + F9334(config, m_softlatch); + m_softlatch->q_out_cb<2>().set(m_video, FUNC(a2_video_device::scr_w)); + // these don't cause mode changes + // m_softlatch->q_out_cb<0>().set(m_video, FUNC(a2_video_device::txt_w)); + // m_softlatch->q_out_cb<1>().set(m_video, FUNC(a2_video_device::mix_w)); + // m_softlatch->q_out_cb<3>().set(m_video, FUNC(a2_video_device::res_w)); + + RAM(config, RAM_TAG).set_default_size("48K").set_default_value(0x00); +} + +/*************************************************************************** + + Game driver(s) + +***************************************************************************/ + +ROM_START(kuzmich) + ROM_REGION(0x8000,"maincpu",0) + ROM_LOAD("ke.bin", 0x0000, 0x8000, CRC(102d246b) SHA1(492dcdf0cc31190a97057a69010e2c9c23b6e59d)) +ROM_END + +} // anonymous namespace + + +// YEAR NAME PARENT MACHINE INPUT CLASS INIT ROT, COMPANY FULLNAME +GAME( 199?, kuzmich, 0, superga2, superga2, superga2_state, empty_init, ROT0, "Nippel", "Kuzmich-Egorych", MACHINE_SUPPORTS_SAVE ) |