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Diffstat (limited to 'src/mame/drivers/tvgame.cpp')
-rw-r--r--src/mame/drivers/tvgame.cpp133
1 files changed, 133 insertions, 0 deletions
diff --git a/src/mame/drivers/tvgame.cpp b/src/mame/drivers/tvgame.cpp
new file mode 100644
index 00000000000..44ede341caf
--- /dev/null
+++ b/src/mame/drivers/tvgame.cpp
@@ -0,0 +1,133 @@
+// license:BSD-3-Clause
+// copyright-holders: Robbbert
+/***************************************************************************
+
+ Homebrew Z80-based TV Game computer by Mr. Isizu
+
+ http://w01.tp1.jp/~a571632211/z80tvgame/index.html
+
+ 2015-06-12 Driver by Robbbert
+
+****************************************************************************/
+
+#include "emu.h"
+#include "cpu/z80/z80.h"
+#include "machine/i8255.h"
+#include "sound/speaker.h"
+
+
+class tvgame_state : public driver_device
+{
+public:
+ tvgame_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag)
+ , m_maincpu(*this, "maincpu")
+ , m_speaker(*this, "speaker")
+ , m_p_videoram(*this, "videoram")
+ { }
+
+ DECLARE_WRITE8_MEMBER(speaker_w);
+ UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+private:
+ required_device<cpu_device> m_maincpu;
+ required_device<speaker_sound_device> m_speaker;
+ required_shared_ptr<UINT8> m_p_videoram;
+};
+
+static ADDRESS_MAP_START( tvgame_mem, AS_PROGRAM, 8, tvgame_state )
+ ADDRESS_MAP_UNMAP_HIGH
+ AM_RANGE( 0x0000, 0x7fff ) AM_ROM
+ AM_RANGE( 0x8000, 0xbfff ) AM_RAM
+ AM_RANGE( 0xc000, 0xdfff ) AM_RAM AM_SHARE("videoram")
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START( tvgame_io, AS_IO, 8, tvgame_state )
+ ADDRESS_MAP_GLOBAL_MASK(3)
+ ADDRESS_MAP_UNMAP_HIGH
+ AM_RANGE( 0x0000, 0x0003) AM_DEVREADWRITE("ppi", i8255_device, read, write)
+ADDRESS_MAP_END
+
+/* Input ports */
+INPUT_PORTS_START( tvgame )
+ PORT_START("LINE0")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_4WAY
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 )
+ PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
+INPUT_PORTS_END
+
+WRITE8_MEMBER( tvgame_state::speaker_w )
+{
+ m_speaker->level_w(BIT(data, 0));
+}
+
+UINT32 tvgame_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
+{
+ UINT8 y,gfx;
+ UINT16 sy=0,ma=241,x;
+
+ for (y = 0; y < 213; y++)
+ {
+ UINT16 *p = &bitmap.pix16(sy++);
+ for (x = ma; x < ma+27; x++)
+ {
+ gfx = m_p_videoram[x];
+
+ /* Display a scanline of a character (8 pixels) */
+ *p++ = BIT(gfx, 0);
+ *p++ = BIT(gfx, 1);
+ *p++ = BIT(gfx, 2);
+ *p++ = BIT(gfx, 3);
+ *p++ = BIT(gfx, 4);
+ *p++ = BIT(gfx, 5);
+ *p++ = BIT(gfx, 6);
+ *p++ = BIT(gfx, 7);
+ }
+ ma+=30;
+ }
+ return 0;
+}
+
+static MACHINE_CONFIG_START( tvgame, tvgame_state )
+ /* basic machine hardware */
+ MCFG_CPU_ADD("maincpu", Z80, XTAL_4MHz)
+ MCFG_CPU_PROGRAM_MAP(tvgame_mem)
+ MCFG_CPU_IO_MAP(tvgame_io)
+
+ /* video hardware */
+ MCFG_SCREEN_ADD("screen", RASTER)
+ MCFG_SCREEN_REFRESH_RATE(50)
+ MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
+ MCFG_SCREEN_UPDATE_DRIVER(tvgame_state, screen_update)
+ MCFG_SCREEN_SIZE(216, 213)
+ MCFG_SCREEN_VISIBLE_AREA(0, 215, 0, 212)
+ MCFG_SCREEN_PALETTE("palette")
+ MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette")
+
+ /* sound hardware */
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+ MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
+
+ // Devices
+ MCFG_DEVICE_ADD("ppi", I8255, 0)
+ MCFG_I8255_IN_PORTA_CB(IOPORT("LINE0"))
+ MCFG_I8255_OUT_PORTC_CB(WRITE8(tvgame_state, speaker_w))
+MACHINE_CONFIG_END
+
+/* ROM definition */
+ROM_START( tvgame )
+ ROM_REGION( 0x8000, "maincpu", 0 )
+ ROM_LOAD( "tvgame_all.ppi", 0x0000, 0x8000, CRC(b61d17bd) SHA1(bb92d6679370fc31d67cc334807d88d7288c7cfa) )
+
+ ROM_REGION(0x1000, "proms", 0)
+ ROM_LOAD( "video32.bin", 0x0000, 0x1000, CRC(516006e3) SHA1(942b31acccf833cd722cbcb739eb87673dc633d7) )
+ROM_END
+
+/* Driver */
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
+CONS( 2011, tvgame, 0, 0, tvgame, tvgame, driver_device, 0, "Mr. Isizu", "Z80 TV Game System", 0 )