diff options
Diffstat (limited to 'src/mess/drivers/prestige.c')
-rw-r--r-- | src/mess/drivers/prestige.c | 520 |
1 files changed, 520 insertions, 0 deletions
diff --git a/src/mess/drivers/prestige.c b/src/mess/drivers/prestige.c new file mode 100644 index 00000000000..7d0f8981234 --- /dev/null +++ b/src/mess/drivers/prestige.c @@ -0,0 +1,520 @@ +/* + +VTech PreComputer Prestige Elite + +PCB Layout +---------- + +|-------------------------------------------| +| |-------CN1-------| CN2 | +| | +| CN3 | +| | +|CN10 | +|CN9 RAM --| +|CN8 | +| | +| Z80 ROM | +| 04010 CN4 | +|CN7 | +|CN6 | +| |------CN5------| --| +|-------------------------------------------| + +Notes: + All IC's shown. + + ROM - VTech LH5S8R14, labeled "1998 27-6020-02" (dumped as 1Mx8) + Z80 - Z80 family SOC? + RAM - LG Semicon GM76C256CLLFW55 32Kx8 Static RAM + 04010 - ? + CN1 - Centronics connector + CN2 - mouse connector + CN3 - LCD ribbon cable + CN4 - expansion connector + CN5 - keyboard ribbon cable + CN6 - speaker wire + CN7 - volume wire + CN8 - ? wire + CN9 - power wire + CN10 - NVRAM battery wire +*/ + +/* + + Undumped cartridges: + + 80-1410 Super Science + 80-1533 Famous Things & Places + 80-0989 Bible Knowledge + 80-1001 Fantasy Trivia + 80-1002 General Knowledge II + 80-1003 Sports History + 80-2314 Familiar Faces + 80-2315 Historical Happenings + 80-2333 Arts, Entertainment & More + 80-2334 Customs & Cultures + 80-1531 32K RAM Memory Expansion Cartridge + 80-12051 Space Scholar + 80-12053 Frenzy of Facts + 80-12052 Spreadsheet Success + +*/ + +/* + + TODO: + + - identify unknown chips (maybe related to the sound??) + - better IRQ timing + - the mouse is too slow and sometime freezes + - finish to decode the memory banking + - sound + - cartridges + +*/ + + +#include "emu.h" +#include "cpu/z80/z80.h" +#include "machine/ram.h" +#include "imagedev/cartslot.h" +#include "rendlay.h" + + +class prestige_state : public driver_device +{ +public: + prestige_state(const machine_config &mconfig, device_type type, const char *tag) + : driver_device(mconfig, type, tag), + m_maincpu(*this, "maincpu"), + m_ram(*this, RAM_TAG) + { } + + required_device<cpu_device> m_maincpu; + required_device<ram_device> m_ram; + + UINT8 m_bank[7]; + UINT8 m_kb_matrix; + UINT8 m_irq_counter; + UINT8 m_mousex; + UINT8 m_mousey; + UINT8 *m_vram; + + virtual void machine_start(); + UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); + + DECLARE_READ8_MEMBER( bankswitch_r ); + DECLARE_WRITE8_MEMBER( bankswitch_w ); + DECLARE_READ8_MEMBER( kb_r ); + DECLARE_WRITE8_MEMBER( kb_w ); + DECLARE_READ8_MEMBER( mouse_r ); + DECLARE_WRITE8_MEMBER( mouse_w ); +}; + + +READ8_MEMBER( prestige_state::bankswitch_r ) +{ + return m_bank[offset]; +} + +WRITE8_MEMBER( prestige_state::bankswitch_w ) +{ + address_space *program = m_maincpu->memory().space(AS_PROGRAM); + + switch (offset) + { + case 0: + membank("bank1")->set_entry(data & 0x3f); + break; + + case 1: + if (m_bank[5] & 0x08) + membank("bank2")->set_entry(0x40 + (data & 1)); + else + membank("bank2")->set_entry(data & 0x3f); + break; + + case 2: + if (m_bank[5] & 0x04) + membank("bank3")->set_entry(0x40 + (data & 1)); + else + membank("bank3")->set_entry(data & 0x3f); + break; + + case 3: + if (m_bank[5] & 0x02) + membank("bank4")->set_entry(0x04 + (data & 0x03)); + else + membank("bank4")->set_entry(data & 0x03); + break; + + case 4: + membank("bank5")->set_entry(data & 0x03); + break; + + case 5: + if (ioport("CART_TYPE")->read() == 0x01) + { + //cartridge memory is writable + if (data & 0x08) + program->install_readwrite_bank(0x4000, 0x7fff, "bank2"); + else + program->unmap_write(0x4000, 0x7fff); + + if (data & 0x04) + program->install_readwrite_bank(0x8000, 0xbfff, "bank3"); + else + program->unmap_write(0x8000, 0xbfff); + + program->install_readwrite_bank(0xc000, 0xdfff, "bank4"); + } + else + { + //cartridge memory is read-only + if (data & 0x02) + program->unmap_write(0xc000, 0xdfff); + else + program->install_readwrite_bank(0xc000, 0xdfff, "bank4"); + + program->unmap_write(0x4000, 0xbfff); + } + break; + case 6: + break; + } + + m_bank[offset] = data; +} + +READ8_MEMBER( prestige_state::kb_r ) +{ + static const char *const bitnames[2][8] = + { + {"LINE0", "LINE1", "LINE2", "LINE3", "LINE4", "LINE5", "LINE6", "LINE7"}, + {"LINE8", "LINE9", "LINEA", "LINEB", "LINEC", "LINED", "LINEE", "LINEF"} + }; + + UINT8 data = 0xff; + + for (int line=0; line<8; line++) + if (!(m_kb_matrix & (1<<line))) + data &= ioport(bitnames[offset][line])->read(); + + return data; +} + +WRITE8_MEMBER( prestige_state::kb_w ) +{ + m_kb_matrix = data; +} + +READ8_MEMBER( prestige_state::mouse_r ) +{ + INT16 data = 0; + + switch( offset ) + { + case 0: //x-axis + data = (ioport("MOUSEX")->read() - m_mousex); + break; + case 1: //y-axis + data = (ioport("MOUSEY")->read() - m_mousey); + break; + } + + return 0x80 + data; +} + +WRITE8_MEMBER( prestige_state::mouse_w ) +{ + switch( offset ) + { + case 0: //x-axis + m_mousex = ioport("MOUSEX")->read(); + break; + case 1: //y-axis + m_mousey = ioport("MOUSEY")->read(); + break; + } +} + +static ADDRESS_MAP_START(prestige_mem, AS_PROGRAM, 8, prestige_state) + AM_RANGE(0x0000, 0x3fff) AM_ROMBANK("bank1") + AM_RANGE(0x4000, 0x7fff) AM_ROMBANK("bank2") + AM_RANGE(0x8000, 0xbfff) AM_ROMBANK("bank3") + AM_RANGE(0xc000, 0xdfff) AM_RAMBANK("bank4") + AM_RANGE(0xe000, 0xffff) AM_RAMBANK("bank5") +ADDRESS_MAP_END + +static ADDRESS_MAP_START( prestige_io , AS_IO, 8, prestige_state) + ADDRESS_MAP_UNMAP_HIGH + ADDRESS_MAP_GLOBAL_MASK(0xff) + AM_RANGE(0x04, 0x05) AM_READWRITE(mouse_r, mouse_w) + AM_RANGE(0x50, 0x56) AM_READWRITE(bankswitch_r, bankswitch_w) + AM_RANGE(0x40, 0x40) AM_WRITE(kb_w) + AM_RANGE(0x41, 0x42) AM_READ(kb_r) +ADDRESS_MAP_END + +/* Input ports */ +INPUT_PORTS_START( prestige ) + PORT_START("CART_TYPE") + PORT_CONFNAME( 0x01, 0x01, "Cartridge Type" ) + PORT_CONFSETTING( 0x00, "ROM" ) + PORT_CONFSETTING( 0x01, "RAM" ) + + PORT_START("MOUSEX") + PORT_BIT( 0xff, 0x00, IPT_MOUSE_X ) PORT_SENSITIVITY(10) PORT_KEYDELTA(0) + + PORT_START("MOUSEY") + PORT_BIT( 0xff, 0x00, IPT_MOUSE_Y ) PORT_SENSITIVITY(10) PORT_KEYDELTA(0) + + PORT_START("LINE0") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Left mouse button") PORT_CODE(MOUSECODE_BUTTON1) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("1") PORT_CODE(KEYCODE_1) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("9") PORT_CODE(KEYCODE_9) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("e") PORT_CODE(KEYCODE_E) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("\xca\xbb") PORT_CODE(KEYCODE_OPENBRACE) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("g") PORT_CODE(KEYCODE_G) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Left Shift") PORT_CODE(KEYCODE_LSHIFT) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(",") PORT_CODE(KEYCODE_COMMA) + + PORT_START("LINE1") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Right mouse button") PORT_CODE(MOUSECODE_BUTTON2) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("2") PORT_CODE(KEYCODE_2) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("r") PORT_CODE(KEYCODE_R) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("+") PORT_CODE(KEYCODE_PLUS_PAD) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("h") PORT_CODE(KEYCODE_H) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("z") PORT_CODE(KEYCODE_Z) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(".") PORT_CODE(KEYCODE_STOP) + + PORT_START("LINE2") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Mouse Up (KB)") PORT_CODE(KEYCODE_8_PAD) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("3") PORT_CODE(KEYCODE_3) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("'") PORT_CODE(KEYCODE_QUOTE) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("t") PORT_CODE(KEYCODE_T) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Ins") PORT_CODE(KEYCODE_HOME) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("j") PORT_CODE(KEYCODE_J) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("x") PORT_CODE(KEYCODE_X) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("-") PORT_CODE(KEYCODE_MINUS) + + PORT_START("LINE3") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Mouse Left (KB)") PORT_CODE(KEYCODE_4_PAD) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("4") PORT_CODE(KEYCODE_4) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("\xc2\xa1") PORT_CODE(KEYCODE_CLOSEBRACE) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("y") PORT_CODE(KEYCODE_Y) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Caps Lock") PORT_CODE(KEYCODE_CAPSLOCK) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("k") PORT_CODE(KEYCODE_K) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("c") PORT_CODE(KEYCODE_C) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Up") PORT_CODE(KEYCODE_UP) + + PORT_START("LINE4") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Mouse Right (KB)") PORT_CODE(KEYCODE_6_PAD) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("5") PORT_CODE(KEYCODE_5) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Backspace") PORT_CODE(KEYCODE_BACKSPACE) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("u") PORT_CODE(KEYCODE_U) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("a") PORT_CODE(KEYCODE_A) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("l") PORT_CODE(KEYCODE_L) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("v") PORT_CODE(KEYCODE_V) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Right Shift") PORT_CODE(KEYCODE_RSHIFT) + + PORT_START("LINE5") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Mouse Down (KB)") PORT_CODE(KEYCODE_2_PAD) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("6") PORT_CODE(KEYCODE_6) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Esc") PORT_CODE(KEYCODE_ESC) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("i") PORT_CODE(KEYCODE_I) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("s") PORT_CODE(KEYCODE_S) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("\xc3\xb1") PORT_CODE(KEYCODE_BACKSLASH) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("b") PORT_CODE(KEYCODE_B) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Help") PORT_CODE(KEYCODE_PGUP) + + PORT_START("LINE6") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("??") PORT_CODE(KEYCODE_F10) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("7") PORT_CODE(KEYCODE_7) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("q") PORT_CODE(KEYCODE_Q) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("o") PORT_CODE(KEYCODE_O) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("d") PORT_CODE(KEYCODE_D) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("??") PORT_CODE(KEYCODE_SLASH) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("n") PORT_CODE(KEYCODE_N) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Symbol") PORT_CODE(KEYCODE_PGDN) + + PORT_START("LINE7") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("OFF") PORT_CODE(KEYCODE_F9) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("8") PORT_CODE(KEYCODE_8) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("w") PORT_CODE(KEYCODE_W) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("p") PORT_CODE(KEYCODE_P) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("f") PORT_CODE(KEYCODE_F) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Enter") PORT_CODE(KEYCODE_ENTER) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("m") PORT_CODE(KEYCODE_M) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Answer") PORT_CODE(KEYCODE_END) + + PORT_START("LINE8") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Word Games") PORT_CODE(KEYCODE_F1) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Player") PORT_CODE(KEYCODE_F2) + PORT_BIT(0xf8, IP_ACTIVE_LOW, IPT_UNUSED) + + PORT_START("LINE9") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Alt") PORT_CODE(KEYCODE_LALT) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Mathematics") PORT_CODE(KEYCODE_F3) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Level") PORT_CODE(KEYCODE_F4) + PORT_BIT(0xf8, IP_ACTIVE_LOW, IPT_UNUSED) + + PORT_START("LINEA") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Repeat") PORT_CODE(KEYCODE_RALT) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Trivia") PORT_CODE(KEYCODE_F5) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Cartridge") PORT_CODE(KEYCODE_F6) + PORT_BIT(0xf8, IP_ACTIVE_LOW, IPT_UNUSED) + + PORT_START("LINEB") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Left") PORT_CODE(KEYCODE_LEFT) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Logic Games") PORT_CODE(KEYCODE_F7) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Business Basics") PORT_CODE(KEYCODE_F8) + PORT_BIT(0xf8, IP_ACTIVE_LOW, IPT_UNUSED) + + PORT_START("LINEC") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Down") PORT_CODE(KEYCODE_DOWN) + PORT_BIT(0xfe, IP_ACTIVE_LOW, IPT_UNUSED) + + PORT_START("LINED") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Right") PORT_CODE(KEYCODE_RIGHT) + PORT_BIT(0xfe, IP_ACTIVE_LOW, IPT_UNUSED) + + PORT_START("LINEE") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Left mouse button (KB)") PORT_CODE(KEYCODE_0_PAD) + PORT_BIT(0xfe, IP_ACTIVE_LOW, IPT_UNUSED) + + PORT_START("LINEF") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Right mouse button (KB)") PORT_CODE(KEYCODE_DEL_PAD) + PORT_BIT(0xfe, IP_ACTIVE_LOW, IPT_UNUSED) + +INPUT_PORTS_END + +static IRQ_CALLBACK( prestige_int_ack ) +{ + UINT32 vector; + prestige_state *state = device->machine().driver_data<prestige_state>(); + + device_set_input_line(state->m_maincpu, 0, CLEAR_LINE); + + if (state->m_irq_counter == 0x02) + { + state->m_irq_counter = 0; + vector = 0x0020; + } + else + { + state->m_irq_counter++; + vector = 0x0030; + } + + return (0xcd<<16) | vector; +} + +void prestige_state::machine_start() +{ + UINT8 *ram = m_ram->pointer(); + memset(ram, 0x00, m_ram->size()); + + device_set_irq_callback(m_maincpu, prestige_int_ack); + + membank("bank1")->configure_entries(0, 64, memregion("maincpu")->base(), 0x4000); + membank("bank2")->configure_entries(0, 64, memregion("maincpu")->base(), 0x4000); + membank("bank2")->configure_entries(64, 2, memregion("cart")->base(), 0x4000); + membank("bank3")->configure_entries(0, 64, memregion("maincpu")->base(), 0x4000); + membank("bank3")->configure_entries(64, 2, memregion("cart")->base(), 0x4000); + membank("bank4")->configure_entries(0, 4, ram, 0x2000); + membank("bank4")->configure_entries(4, 4, memregion("cart")->base(), 0x2000); + membank("bank5")->configure_entries(0, 4, ram, 0x2000); + + membank("bank1")->set_entry(0); + membank("bank2")->set_entry(0); + membank("bank3")->set_entry(0); + membank("bank4")->set_entry(0); + membank("bank5")->set_entry(0); + + //pointer to the videoram + m_vram = ram; +} + +static PALETTE_INIT( prestige ) +{ + palette_set_color(machine, 0, MAKE_RGB(39, 108, 51)); + palette_set_color(machine, 1, MAKE_RGB(16, 37, 84)); +} + +UINT32 prestige_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) +{ + UINT16 addr = 0; + + for (int y = 0; y < 100; y++) + { + for (int sx = 0; sx < 30; sx++) + { + UINT8 data = m_vram[addr]; + + for (int x = 0; x < 8; x++) + { + bitmap.pix16(y, (sx * 8) + x) = BIT(data, 7); + + data <<= 1; + } + + addr++; + } + } + + return 0; +} + +static TIMER_DEVICE_CALLBACK( irq_timer ) +{ + cputag_set_input_line(timer.machine(), "maincpu", 0, ASSERT_LINE); +} + +static MACHINE_CONFIG_START( prestige, prestige_state ) + /* basic machine hardware */ + MCFG_CPU_ADD("maincpu",Z80, XTAL_4MHz) + MCFG_CPU_PROGRAM_MAP(prestige_mem) + MCFG_CPU_IO_MAP(prestige_io) + + MCFG_TIMER_ADD_PERIODIC("irq_timer", irq_timer, attotime::from_msec(10)) + + /* video hardware */ + MCFG_SCREEN_ADD("screen", LCD) + MCFG_SCREEN_REFRESH_RATE(50) + MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ + MCFG_SCREEN_UPDATE_DRIVER(prestige_state, screen_update) + MCFG_SCREEN_SIZE( 240, 100 ) + MCFG_SCREEN_VISIBLE_AREA( 0, 240-1, 0, 100-1 ) + + MCFG_DEFAULT_LAYOUT( layout_lcd ) + + MCFG_PALETTE_LENGTH(2) + MCFG_PALETTE_INIT(prestige) + + /* cartridge */ + MCFG_CARTSLOT_ADD("cart") + MCFG_CARTSLOT_EXTENSION_LIST("bin") + MCFG_CARTSLOT_INTERFACE("prestige_cart") + + /* internal ram */ + MCFG_RAM_ADD(RAM_TAG) + MCFG_RAM_DEFAULT_SIZE("32K") + MCFG_RAM_EXTRA_OPTIONS("64K") +MACHINE_CONFIG_END + +/* ROM definition */ +ROM_START( prestige ) + ROM_REGION( 0x100000, "maincpu", 0 ) + ROM_LOAD( "27-6020-02.u2", 0x00000, 0x100000, CRC(6bb6db14) SHA1(5d51fc3fd799e7f01ee99c453f9005fb07747b1e) ) + + ROM_REGION( 0x8000, "cart", ROMREGION_ERASE ) + ROM_CART_LOAD( "cart", 0, 0x8000, 0 ) +ROM_END + +/* Driver */ + +/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */ +COMP( 1998, prestige, 0, 0, prestige, prestige, driver_device, 0, "VTech", "PreComputer Prestige Elite", GAME_NOT_WORKING | GAME_NO_SOUND) |