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diff --git a/src/mame/drivers/wswan.cpp b/src/mame/drivers/wswan.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Anthony Kruize,Wilbert Pol
+/***************************************************************************
+
+ wswan.c
+
+ Driver file to handle emulation of the Bandai WonderSwan
+ By:
+
+ Anthony Kruize
+ Wilbert Pol
+
+ Based on the WStech documentation by Judge and Dox.
+
+ Known issues/TODOs:
+ - Get the V30MZ core into MAME, still need to remove some nec specific
+ instructions and fix the flags handling of the div/mul instructions.
+ - Add support for noise sound
+ - Add support for voice sound
+ - Add support for enveloped sound
+ - Perform video DMA at proper timing.
+ - Add sound DMA.
+ - Setup some reasonable values in the internal EEPROM area?
+ - Add (real/proper) RTC support.
+ - Look into timing issues like in Puzzle Bobble. VBlank interrupt lasts very long
+ which causes sprites to be disabled until about 10%-40% of drawing the screen.
+ The real unit seems to display things fine, need a real unit + real cart to
+ verify.
+ - Is background color setting really ok?
+ - Get a dump of the internal BIOSes.
+ - Swan Crystal can handle up to 512Mbit ROMs??????
+
+
+***************************************************************************/
+
+#include "includes/wswan.h"
+#include "softlist.h"
+#include "wswan.lh"
+
+static ADDRESS_MAP_START (wswan_mem, AS_PROGRAM, 8, wswan_state)
+ AM_RANGE(0x00000, 0x03fff) AM_DEVREADWRITE("vdp", wswan_video_device, vram_r, vram_w) // 16kb RAM / 4 colour tiles
+ AM_RANGE(0x04000, 0x0ffff) AM_NOP // nothing
+ //AM_RANGE(0x10000, 0xeffff) // cart range, setup at machine_start
+ AM_RANGE(0xf0000, 0xfffff) AM_READ(bios_r)
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START (wscolor_mem, AS_PROGRAM, 8, wswan_state)
+ AM_RANGE(0x00000, 0x0ffff) AM_DEVREADWRITE("vdp", wswan_video_device, vram_r, vram_w) // 16kb RAM / 4 colour tiles, 16 colour tiles + palettes
+ //AM_RANGE(0x10000, 0xeffff) // cart range, setup at machine_start
+ AM_RANGE(0xf0000, 0xfffff) AM_READ(bios_r)
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START (wswan_io, AS_IO, 8, wswan_state)
+ AM_RANGE(0x00, 0xff) AM_READWRITE(port_r, port_w) // I/O ports
+ADDRESS_MAP_END
+
+static INPUT_PORTS_START( wswan )
+ PORT_START("CURSX")
+ PORT_BIT( 0x1, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_NAME("X1 - Up")
+ PORT_BIT( 0x4, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_NAME("X3 - Down")
+ PORT_BIT( 0x8, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_NAME("X4 - Left")
+ PORT_BIT( 0x2, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_NAME("X2 - Right")
+
+ PORT_START("BUTTONS")
+ PORT_BIT( 0x2, IP_ACTIVE_HIGH, IPT_START1 ) PORT_NAME("Start")
+ PORT_BIT( 0x4, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_NAME("Button A")
+ PORT_BIT( 0x8, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_NAME("Button B")
+
+ PORT_START("CURSY")
+ PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_OTHER ) PORT_NAME("Y1 - Up") PORT_CODE(KEYCODE_W)
+ PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_OTHER ) PORT_NAME("Y3 - Down") PORT_CODE(KEYCODE_S)
+ PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_OTHER ) PORT_NAME("Y4 - Left") PORT_CODE(KEYCODE_A)
+ PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_OTHER ) PORT_NAME("Y2 - Right") PORT_CODE(KEYCODE_D)
+INPUT_PORTS_END
+
+static GFXDECODE_START( wswan )
+GFXDECODE_END
+
+/* WonderSwan can display 16 shades of grey */
+PALETTE_INIT_MEMBER(wswan_state, wswan)
+{
+ for (int i = 0; i < 16; i++)
+ {
+ UINT8 shade = i * (256 / 16);
+ palette.set_pen_color(15 - i, shade, shade, shade);
+ }
+}
+
+PALETTE_INIT_MEMBER(wswan_state, wscolor)
+{
+ for (int i = 0; i < 4096; i++)
+ {
+ int r = (i & 0x0f00) >> 8;
+ int g = (i & 0x00f0) >> 4;
+ int b = i & 0x000f;
+ palette.set_pen_color(i, r << 4, g << 4, b << 4);
+ }
+}
+
+static SLOT_INTERFACE_START(wswan_cart)
+ SLOT_INTERFACE_INTERNAL("ws_rom", WS_ROM_STD)
+ SLOT_INTERFACE_INTERNAL("ws_sram", WS_ROM_SRAM)
+ SLOT_INTERFACE_INTERNAL("ws_eeprom", WS_ROM_EEPROM)
+SLOT_INTERFACE_END
+
+static MACHINE_CONFIG_START( wswan, wswan_state )
+ /* Basic machine hardware */
+ MCFG_CPU_ADD("maincpu", V30MZ, 3072000)
+ MCFG_CPU_PROGRAM_MAP(wswan_mem)
+ MCFG_CPU_IO_MAP(wswan_io)
+
+ MCFG_DEVICE_ADD("vdp", WSWAN_VIDEO, 0)
+ MCFG_WSWAN_VIDEO_TYPE(VDP_TYPE_WSWAN)
+ MCFG_WSWAN_VIDEO_IRQ_CB(wswan_state, set_irq_line)
+ MCFG_WSWAN_VIDEO_DMASND_CB(wswan_state, dma_sound_cb)
+
+ MCFG_SCREEN_ADD("screen", LCD)
+ MCFG_SCREEN_REFRESH_RATE(75)
+ MCFG_SCREEN_VBLANK_TIME(0)
+ MCFG_SCREEN_UPDATE_DEVICE("vdp", wswan_video_device, screen_update)
+ MCFG_SCREEN_SIZE(WSWAN_X_PIXELS, WSWAN_Y_PIXELS)
+ MCFG_SCREEN_VISIBLE_AREA(0*8, WSWAN_X_PIXELS - 1, 0, WSWAN_Y_PIXELS - 1)
+ MCFG_SCREEN_PALETTE("palette")
+
+ MCFG_DEFAULT_LAYOUT(layout_wswan)
+
+ MCFG_QUANTUM_TIME(attotime::from_hz(60))
+
+ MCFG_NVRAM_ADD_1FILL("nvram")
+
+ MCFG_GFXDECODE_ADD("gfxdecode", "palette", wswan)
+ MCFG_PALETTE_ADD("palette", 16)
+ MCFG_PALETTE_INIT_OWNER(wswan_state, wswan)
+
+ /* sound hardware */
+ MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
+ MCFG_SOUND_ADD("custom", WSWAN_SND, 0)
+ MCFG_SOUND_ROUTE(0, "lspeaker", 0.50)
+ MCFG_SOUND_ROUTE(1, "rspeaker", 0.50)
+
+ /* cartridge */
+ MCFG_WSWAN_CARTRIDGE_ADD("cartslot", wswan_cart, NULL)
+
+ /* software lists */
+ MCFG_SOFTWARE_LIST_ADD("cart_list","wswan")
+ MCFG_SOFTWARE_LIST_COMPATIBLE_ADD("wsc_list","wscolor")
+MACHINE_CONFIG_END
+
+static MACHINE_CONFIG_DERIVED( wscolor, wswan )
+ MCFG_CPU_MODIFY("maincpu")
+ MCFG_CPU_PROGRAM_MAP(wscolor_mem)
+ MCFG_MACHINE_START_OVERRIDE(wswan_state, wscolor)
+
+ MCFG_DEVICE_MODIFY("vdp")
+ MCFG_WSWAN_VIDEO_TYPE(VDP_TYPE_WSC)
+
+ MCFG_PALETTE_MODIFY("palette")
+ MCFG_PALETTE_ENTRIES(4096)
+ MCFG_PALETTE_INIT_OWNER(wswan_state, wscolor)
+
+ /* software lists */
+ MCFG_DEVICE_REMOVE("cart_list")
+ MCFG_DEVICE_REMOVE("wsc_list")
+ MCFG_SOFTWARE_LIST_ADD("cart_list","wscolor")
+ MCFG_SOFTWARE_LIST_COMPATIBLE_ADD("ws_list","wswan")
+MACHINE_CONFIG_END
+
+/***************************************************************************
+
+ Game driver(s)
+
+***************************************************************************/
+
+ROM_START( wswan )
+ ROM_REGION( 0x100000, "maincpu", ROMREGION_ERASEFF )
+// ROM_LOAD_OPTIONAL( "ws_bios.bin", 0x0000, 0x0001, NO_DUMP )
+ROM_END
+
+ROM_START( wscolor )
+ ROM_REGION( 0x100000, "maincpu", ROMREGION_ERASEFF )
+// ROM_LOAD_OPTIONAL( "wsc_bios.bin", 0x0000, 0x0001, NO_DUMP )
+ROM_END
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME*/
+CONS( 1999, wswan, 0, 0, wswan, wswan, driver_device, 0, "Bandai", "WonderSwan", MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE )
+CONS( 2000, wscolor, wswan, 0, wscolor, wswan, driver_device, 0, "Bandai", "WonderSwan Color", MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE )