diff options
Diffstat (limited to 'src/mame/drivers/lexibook_jg7425.cpp')
-rw-r--r-- | src/mame/drivers/lexibook_jg7425.cpp | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/src/mame/drivers/lexibook_jg7425.cpp b/src/mame/drivers/lexibook_jg7425.cpp new file mode 100644 index 00000000000..482b84ce6a5 --- /dev/null +++ b/src/mame/drivers/lexibook_jg7425.cpp @@ -0,0 +1,109 @@ +// license:BSD-3-Clause +// copyright-holders:David Haywood + + +/* + +a 221 games console which uses a 4GB sd-card for gamestorage and a MX29LV160 flashrom for the internal bios. (only 512kb are used from the 2mb romspace) +Starting the console without SD-Card just show's a looping video with "Please insert Memory Card". + +SD card image produced with WinHex (hardware write blocker used to prevent Windows from corrupting data) +compressed with "chdman createhd -i 4GBSD.img -o lexibook_jg7425_4gbsd.chd" (is this correct?) + +TODO: +is there an internal ROM / bootstrap area, or does this SunPlus core use vectors in a different way to the one in hyperscan.cpp? +If SPG290, should probably be merged with hyperscan.cpp + +(only noteworthy features of PCB are ROM + RAM + Cpu Glob) + +*/ + +#include "emu.h" +#include "screen.h" +#include "cpu/score/score.h" + +class lexibook_jg7425_state : public driver_device +{ +public: + lexibook_jg7425_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_mainram(*this, "mainram"), + m_romregion(*this, "maincpu") + { } + + void lexibook_jg7425(machine_config &config); + + void map(address_map& map); + +protected: + uint32_t screen_update(screen_device& screen, bitmap_rgb32& bitmap, const rectangle& cliprect); + +private: + virtual void machine_start() override; + virtual void machine_reset() override; + + required_device<score7_cpu_device> m_maincpu; + required_device<screen_device> m_screen; + required_shared_ptr<uint32_t> m_mainram; + required_region_ptr<uint32_t> m_romregion; +}; + + + +void lexibook_jg7425_state::machine_start() +{ + // I think this code should be running from RAM at least, probably some kind of bootstrap / internal ROM to copy it? (hyperscan.cpp indicates that SoC can have internal ROM at least) + + // first 0x20 bytes are probably pointers, code starts at 0x20 and is offset, maps at 0x500000 + + for (int i = 0; i < 0x80000 / 4; i++) + { + m_mainram[i+(0x500000/4) - (0x20/4)] = m_romregion[i]; + } +} + +void lexibook_jg7425_state::machine_reset() +{ +} + +static INPUT_PORTS_START( lexibook_jg7425 ) +INPUT_PORTS_END + + +uint32_t lexibook_jg7425_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) +{ + return 0; +} + +void lexibook_jg7425_state::map(address_map &map) +{ + map(0x00000000, 0x00ffffff).ram().share("mainram"); + + map(0x9f000000, 0x9fffffff).ram().share("mainram"); +} + + +void lexibook_jg7425_state::lexibook_jg7425(machine_config &config) +{ + /* basic machine hardware */ + SCORE7(config, m_maincpu, XTAL(27'000'000) * 4); // ? not certain on exact type + m_maincpu->set_addrmap(AS_PROGRAM, &lexibook_jg7425_state::map); + + SCREEN(config, m_screen, SCREEN_TYPE_RASTER); + m_screen->set_refresh_hz(60); + m_screen->set_size(320, 262); + m_screen->set_visarea(0, 320-1, 0, 240-1); + m_screen->set_screen_update(FUNC(lexibook_jg7425_state::screen_update)); +} + +ROM_START( lx_jg7425 ) + ROM_REGION( 0x200000, "maincpu", ROMREGION_32BIT | ROMREGION_LE ) + ROM_LOAD32_DWORD( "mx29lv160.u6", 0x000000, 0x200000, CRC(43c90080) SHA1(4c9e5c8f880d40bd684357ce67ae45c3f5d24b62) ) + + DISK_REGION( "ata:0:hdd:image" ) /* 4GB SD Card */ + DISK_IMAGE( "lexibook_jg7425_4gbsd", 0, SHA1(dc0985103edec3992efdd493feef6185daedb3fd) ) +ROM_END + +CONS( 2015, lx_jg7425, 0, 0, lexibook_jg7425, lexibook_jg7425, lexibook_jg7425_state, empty_init, "Lexibook", "Lexibook JG7425 221-in-1", MACHINE_IS_SKELETON ) |