// license:GPL-2.0+ // copyright-holders:Peter Trauner /* TimeTop - GameKing */ /* PeT mess@utanet.at 2015 Thanks to Deathadder, Judge, Porchy, Klaus Sommer, James Brolly & Brian Provinciano hopefully my work (reverse engineerung, cartridge+bios backup, emulation) will be honored in future and my name will not be removed entirely, especially by simple code rewrites of working emulation flashcard, handheld, programmer, assembler ready to do some test on real hardware todo: !back up gameking3 bios so emulation of gameking3 gets possible; my gameking bios backup solution should work search for rockwell r65c02 variant (cb:wai instruction) and several more exceptions, and implement it (with luck microcontroller peripherals match those in gameking) work out bankswitching and exceptions (improove emulation) (add audio) use gameking3 cartridge to get illegal cartridge scroller This system appears to be based on the GeneralPlus GPL133 system-on-chip or a close relative. Datasheet: http://www.generalplus.com/doc/ds/GPL133AV10_spec.pdf */ #include "emu.h" #include "cpu/m6502/r65c02.h" #include "bus/generic/slot.h" #include "bus/generic/carts.h" #include "emupal.h" #include "screen.h" #include "softlist.h" #include class gameking_state : public driver_device { public: gameking_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_joy(*this, "JOY"), m_palette(*this, "palette") { } void gameking(machine_config &config); void gameking3(machine_config &config); void gameking1(machine_config &config); void init_gameking(); protected: virtual void machine_start() override; virtual void machine_reset() override; private: void gameking_palette(palette_device &palette) const; DECLARE_READ8_MEMBER(io_r); DECLARE_WRITE8_MEMBER(io_w); DECLARE_READ8_MEMBER(lcd_r); DECLARE_WRITE8_MEMBER(lcd_w); INTERRUPT_GEN_MEMBER(gameking_frame_int); TIMER_CALLBACK_MEMBER(gameking_timer); TIMER_CALLBACK_MEMBER(gameking_timer2); uint32_t screen_update_gameking(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); DECLARE_DEVICE_IMAGE_LOAD_MEMBER(gameking_cart); struct Gkio { uint8_t input, input2; uint8_t timer; uint8_t res3[0x2f]; uint8_t bank4000_address; // 32 uint8_t bank4000_cart; //33 bit 0 only? uint8_t bank8000_cart; //34 bit 7; bits 0,1,.. a15,a16,.. uint8_t res2[0x4c]; }; void gameking_mem(address_map &map); required_device m_maincpu; required_device m_cart; required_ioport m_io_joy; required_device m_palette; memory_region *m_cart_rom; memory_bank *m_bank4000; memory_bank *m_bank8000; emu_timer *timer1; emu_timer *timer2; }; WRITE8_MEMBER(gameking_state::io_w) { if (offset != offsetof(Gkio, bank8000_cart)) logerror("%.6f io w %x %x\n", machine().time().as_double(), offset, data); memory_region *maincpu_rom = memregion("maincpu"); maincpu_rom->base()[offset] = data; if (offset == offsetof(Gkio, timer)) { m_maincpu->set_input_line(M6502_IRQ_LINE, CLEAR_LINE); timer1->enable(true); timer1->reset(m_maincpu->cycles_to_attotime(data * 300/*?*/)); } Gkio *io = reinterpret_cast(maincpu_rom->base()); if (offset == offsetof(Gkio, bank4000_address) || offset == offsetof(Gkio, bank4000_cart)) { uint8_t bank = io->bank4000_address ^ 1; uint8_t *base = io->bank4000_cart & 1/*?*/ && m_cart_rom ? m_cart_rom->base() : maincpu_rom->base() + 0x10000; m_bank4000->set_base(base + bank * 0x4000); } if (offset == offsetof(Gkio, bank8000_cart)) { uint8_t *base = io->bank8000_cart & 0x80/*?*/ && m_cart_rom ? m_cart_rom->base() : maincpu_rom->base() + 0x10000; uint8_t bank = io->bank8000_cart & 0x7f; m_bank8000->set_base(base + bank * 0x8000); } } READ8_MEMBER(gameking_state::io_r) { memory_region *maincpu_rom = memregion("maincpu"); uint8_t data = maincpu_rom->base()[offset]; switch (offset) { case offsetof(Gkio, input): data = m_io_joy->read() | ~3; break; case offsetof(Gkio, input2): data = m_io_joy->read() | 3; break; case 0x4c: data = 6; break; // bios protection endless loop } if (offset != offsetof(Gkio, bank8000_cart)) logerror("%.6f io r %x %x\n", machine().time().as_double(), offset, data); return data; } WRITE8_MEMBER( gameking_state::lcd_w ) { memory_region *maincpu_rom = memregion("maincpu"); maincpu_rom->base()[offset+0x600]=data; } READ8_MEMBER(gameking_state::lcd_r) { memory_region *maincpu_rom = memregion("maincpu"); uint8_t data = maincpu_rom->base()[offset + 0x600]; return data; } void gameking_state::gameking_mem(address_map &map) { map(0x0000, 0x007f).rw(FUNC(gameking_state::io_r), FUNC(gameking_state::io_w)); map(0x0080, 0x01ff).ram(); map(0x0200, 0x03ff).ram(); // lcd 2nd copy map(0x0600, 0x077f).rw(FUNC(gameking_state::lcd_r), FUNC(gameking_state::lcd_w)); map(0x0d00, 0x0fff).ram(); // d00, e00, f00 prooved on handheld // AM_RANGE(0x1000, 0x1fff) AM_RAM // sthero writes to $19xx // AM_RANGE(0x3000, 0x3fff) AM_ROMBANK("bank3000") map(0x4000, 0x7fff).bankr("bank4000"); map(0x8000, 0xffaf).bankr("bank8000"); map(0xffb0, 0xffff).bankr("bankboot"); // cpu seems to read from 8000 bank, and for exceptions ignore bank } static INPUT_PORTS_START( gameking ) PORT_START("JOY") PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START) PORT_NAME("Start") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_SELECT) PORT_NAME("Select") //? PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON2) PORT_NAME("A") //? PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON1) PORT_NAME("B") PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) //? PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) //? PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_UP) INPUT_PORTS_END static constexpr rgb_t gameking_pens[] = { { 255, 255, 255 }, { 127, 127, 127 }, { 63, 63, 63 }, { 0, 0, 0 } }; void gameking_state::gameking_palette(palette_device &palette) const { palette.set_pen_colors(0, gameking_pens); } uint32_t gameking_state::screen_update_gameking(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { for (int y=31, i=0;i<32;i++,y--) { for (int x=0, j=0;j<48/4;x+=4, j++) { memory_region *maincpu_rom = memregion("maincpu"); uint8_t data=maincpu_rom->base()[0x600+j+i*12]; bitmap.pix16(y, x+3)=data&3; bitmap.pix16(y, x+2)=(data>>2)&3; bitmap.pix16(y, x+1)=(data>>4)&3; bitmap.pix16(y, x)=(data>>6)&3; } } return 0; } void gameking_state::init_gameking() { timer1 = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(gameking_state::gameking_timer), this)); timer2 = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(gameking_state::gameking_timer2), this)); } TIMER_CALLBACK_MEMBER(gameking_state::gameking_timer) { m_maincpu->set_input_line(M6502_IRQ_LINE, ASSERT_LINE); // in reality int for vector at fff4 timer1->enable(false); timer2->enable(true); timer2->reset(m_maincpu->cycles_to_attotime(10/*?*/)); } TIMER_CALLBACK_MEMBER(gameking_state::gameking_timer2) { memory_region *maincpu_rom = memregion("maincpu"); m_maincpu->set_input_line(M6502_IRQ_LINE, CLEAR_LINE); // in reality int for vector at fff4 timer2->enable(false); timer1->enable(true); Gkio *io = reinterpret_cast(maincpu_rom->base()); timer1->reset(m_maincpu->cycles_to_attotime(io->timer * 300/*?*/)); } DEVICE_IMAGE_LOAD_MEMBER( gameking_state, gameking_cart ) { uint32_t size = m_cart->common_get_size("rom"); if (size > 0x80000) { 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; } void gameking_state::machine_start() { std::string region_tag; m_cart_rom = memregion(region_tag.assign(m_cart->tag()).append(GENERIC_ROM_REGION_TAG).c_str()); m_bank4000 = membank("bank4000"); m_bank8000 = membank("bank8000"); memory_region *maincpu_rom = memregion("maincpu"); memory_bank *bankboot=membank("bankboot"); maincpu_rom->base()[0x10000+0x7ffe]=0xcf; // routing irq to timerint until r65c02gk hooked up bankboot->set_base(maincpu_rom->base()+0x10000+0x7fb0); } void gameking_state::machine_reset() { memory_region *maincpu_rom = memregion("maincpu"); maincpu_rom->base()[0x32] = 0; // neccessary to boot correctly maincpu_rom->base()[0x33] = 0; m_bank4000->set_base(maincpu_rom->base() + 0x10000 + 0x4000); //m_bank8000->set_base(maincpu_rom->base()+0x10000); //? no reason to enforce this yet } INTERRUPT_GEN_MEMBER(gameking_state::gameking_frame_int) // guess to get over bios wai { // static int line=0; // line++; // m_maincpu->set_input_line(M6502_IRQ_LINE, line&1? ASSERT_LINE: CLEAR_LINE); // in reality int for vector at fff4 } MACHINE_CONFIG_START(gameking_state::gameking) /* basic machine hardware */ MCFG_DEVICE_ADD("maincpu", R65C02, 6000000) MCFG_DEVICE_PROGRAM_MAP(gameking_mem) MCFG_DEVICE_VBLANK_INT_DRIVER("screen", gameking_state, gameking_frame_int) /* video hardware */ MCFG_SCREEN_ADD("screen", LCD) MCFG_SCREEN_REFRESH_RATE(60) MCFG_SCREEN_SIZE(48, 32) MCFG_SCREEN_VISIBLE_AREA(0, 48-1, 0, 32-1) MCFG_SCREEN_UPDATE_DRIVER(gameking_state, screen_update_gameking) MCFG_SCREEN_PALETTE(m_palette) PALETTE(config, m_palette, FUNC(gameking_state::gameking_palette), ARRAY_LENGTH(gameking_pens)); /* cartridge */ MCFG_GENERIC_CARTSLOT_ADD("cartslot", generic_plain_slot, "gameking_cart") MCFG_GENERIC_EXTENSIONS("bin") MCFG_GENERIC_LOAD(gameking_state, gameking_cart) MACHINE_CONFIG_END MACHINE_CONFIG_START(gameking_state::gameking1) gameking(config); MCFG_SOFTWARE_LIST_ADD("cart_list", "gameking") MACHINE_CONFIG_END MACHINE_CONFIG_START(gameking_state::gameking3) gameking(config); MCFG_SOFTWARE_LIST_ADD("cart_list", "gameking") MCFG_SOFTWARE_LIST_ADD("cart_list_3", "gameking3") MACHINE_CONFIG_END ROM_START(gameking) ROM_REGION(0x10000+0x80000, "maincpu", ROMREGION_ERASE00) // ROM_LOAD("gm218.bin", 0x10000, 0x80000, CRC(8f52a928) SHA1(2e791fc7b642440d36820d2c53e1bb732375eb6e) ) // a14 inversed ROM_LOAD("gm218.bin", 0x10000, 0x80000, CRC(5a1ade3d) SHA1(e0d056f8ebfdf52ef6796d0375eba7fcc4a6a9d3) ) ROM_END ROM_START(gamekin3) ROM_REGION(0x10000+0x80000, "maincpu", ROMREGION_ERASE00) ROM_LOAD("gm220.bin", 0x10000, 0x80000, CRC(1dc43bd5) SHA1(f9dcd3cb76bb7cb10565a1acb070ab375c082b4c) ) ROM_END CONS( 2003, gameking, 0, 0, gameking1, gameking, gameking_state, init_gameking, "TimeTop", "GameKing GM-218", MACHINE_NOT_WORKING | MACHINE_NO_SOUND ) // the GameKing 2 (GM-219) is probably identical HW CONS( 2003, gamekin3, 0, 0, gameking3, gameking, gameking_state, init_gameking, "TimeTop", "GameKing 3", MACHINE_NOT_WORKING | MACHINE_NO_SOUND ) // gameking 3: similiar cartridges, accepts gameking cartridges, gameking3 cartridges not working on gameking (illegal cartridge scroller) // my gameking bios backup solution might work on it