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Diffstat (limited to 'src/mame/ussr/krokha.cpp')
-rw-r--r-- | src/mame/ussr/krokha.cpp | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/src/mame/ussr/krokha.cpp b/src/mame/ussr/krokha.cpp new file mode 100644 index 00000000000..d3d739ae261 --- /dev/null +++ b/src/mame/ussr/krokha.cpp @@ -0,0 +1,168 @@ +// license:BSD-3-Clause +// copyright-holders:Sergey Svishchev +/*************************************************************************** + + Кроха (Krokha, "Tiny"), TV game by Контур (SKB Kontur). + It was apparently only for SKB Kontur workers, not sold in stores. + + К580ВМ80А @ 2MHz, 2KB RAM. Screen is 48x32 monochrome text. + Joystick, built-in 1-bit speaker. + + Only known cartridge has 5 built-in games: + - Breakout + - Tetris + - Snake + - Xonix + - Air Defence + + https://zx-pk.ru/threads/26306-igrovaya-pristavka-quot-krokha-quot.html + discussion + + http://www.nedopc.org/forum/viewtopic.php?f=90&t=11458 + discussion + schematics + + http://alemorf.ru/comps/kroha/index.html + photos + + TODO: + - second joystick? + - video timing + +****************************************************************************/ + +#include "emu.h" + +#include "cpu/i8085/i8085.h" +#include "sound/spkrdev.h" + +#include "emupal.h" +#include "screen.h" +#include "speaker.h" + +namespace { + +class krokha_state : public driver_device +{ +public: + krokha_state(const machine_config &mconfig, device_type type, const char *tag) + : driver_device(mconfig, type, tag) + , m_maincpu(*this, "maincpu") + , m_screen(*this, "screen") + , m_p_videoram(*this, "videoram") + , m_p_chargen(*this, "chargen") + , m_speaker(*this, "speaker") + { } + + static constexpr feature_type imperfect_features() { return feature::CONTROLS; } + + void krokha(machine_config &config); + +private: + uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); + + void krokha_mem(address_map &map); + + void status_callback(uint8_t data); + void speaker_w(uint8_t data); + + required_device<i8080a_cpu_device> m_maincpu; + required_device<screen_device> m_screen; + required_shared_ptr<u8> m_p_videoram; + required_region_ptr<u8> m_p_chargen; + required_device<speaker_sound_device> m_speaker; +}; + +// + +void krokha_state::status_callback(uint8_t data) +{ + if (data & i8080a_cpu_device::STATUS_INTA) + { + // interrupt acknowledge + m_maincpu->set_input_line(INPUT_LINE_IRQ0, CLEAR_LINE); + } +} + +void krokha_state::speaker_w(uint8_t data) +{ + m_speaker->level_w(BIT(data, 1)); +} + +// + +void krokha_state::krokha_mem(address_map &map) +{ + map.unmap_value_high(); + map(0x0000, 0x1fff).rom(); + map(0xe000, 0xe7ff).ram().mirror(0x0800).share("videoram"); + map(0xf7ff, 0xf7ff).portr("P1").w(FUNC(krokha_state::speaker_w)); +} + +static INPUT_PORTS_START( krokha ) + PORT_START("P1") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON1 ) + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY + PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED ) +INPUT_PORTS_END + +uint32_t krokha_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) +{ + for (int y = 0; y < 32; y++) + { + for (int x = 0; x < 64; x++) + { + for (int ra = 0; ra < 8; ra++) + { + uint8_t gfx = m_p_chargen[m_p_videoram[x << 5 | y] << 3 | ra]; + for (int i = 0; i < 8; i++) + { + int dx = x << 3 | i; + int dy = y << 3 | ra; + if (cliprect.contains(dx, dy)) + bitmap.pix(dy, dx) = BIT(gfx, i ^ 7); + } + } + } + } + + return 0; +} + + +void krokha_state::krokha(machine_config &config) +{ + I8080A(config, m_maincpu, 8_MHz_XTAL / 4); + m_maincpu->set_addrmap(AS_PROGRAM, &krokha_state::krokha_mem); + m_maincpu->out_status_func().set(FUNC(krokha_state::status_callback)); + + SCREEN(config, m_screen, SCREEN_TYPE_RASTER); + m_screen->set_refresh_hz(50); + m_screen->set_vblank_time(ATTOSECONDS_IN_USEC(2500)); + m_screen->set_size(64 * 8, 32 * 8); + m_screen->set_visarea(16 * 8, 64 * 8 - 1, 0 * 8, 32 * 8 - 1); + m_screen->set_screen_update(FUNC(krokha_state::screen_update)); + m_screen->set_palette("palette"); + m_screen->screen_vblank().set_inputline(m_maincpu, INPUT_LINE_IRQ0); + + PALETTE(config, "palette", palette_device::MONOCHROME); + + SPEAKER(config, "mono").front_center(); + SPEAKER_SOUND(config, "speaker").add_route(ALL_OUTPUTS, "mono", 0.25); +} + +ROM_START( krokha ) + ROM_REGION(0x2000, "maincpu", 0) + ROM_LOAD("bios.bin", 0x0000, 0x2000, CRC(e37556f4) SHA1(b1da9d7338eb227b0aff5675719f7a2aab607e66)) + + ROM_REGION(0x0800, "chargen", 0) + ROM_LOAD("font.bin", 0x0000, 0x0800, CRC(2f4fcfb5) SHA1(175cafe3dc9291f505d69aced9c405c38b7f7086)) +ROM_END + +} // anonymous namespace + + +// YEAR NAME PARENT COMP MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS +CONS( 1990, krokha, 0, 0, krokha, krokha, krokha_state, empty_init, "SKB Kontur", "Krokha", MACHINE_SUPPORTS_SAVE ) |