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-rw-r--r--src/mess/drivers/prestige.c520
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)