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Diffstat (limited to 'src/mame/drivers/truco.c')
-rw-r--r--src/mame/drivers/truco.c190
1 files changed, 190 insertions, 0 deletions
diff --git a/src/mame/drivers/truco.c b/src/mame/drivers/truco.c
new file mode 100644
index 00000000000..48cfa7e4f17
--- /dev/null
+++ b/src/mame/drivers/truco.c
@@ -0,0 +1,190 @@
+/*
+
+ Truco-Tron - (c) 198? Playtronic SRL, Argentina
+
+ Written by Ernesto Corvi
+
+ Notes:
+ - The board uses a battery backed ram for protection, mapped at $7c00-$7fff.
+ - If the battery backup data is corrupt, it comes up with some sort of code entry screen.
+ As far as I can tell, you can't do anything with it.
+ - Replacing the battery backed ram with an eeprom is not really an option since the game stores the
+ current credits count in the battery backed ram.
+ - System clock is 12 Mhz. The CPU clock is unknown.
+ - The Alternate Gfx mode is funky. Not only it has different bitmaps, but also the strings with the
+ game options are truncated. Title is also truncated.
+*/
+
+#include "driver.h"
+#include "cpu/m6809/m6809.h"
+#include "sound/dac.h"
+
+static UINT8 *battery_ram;
+
+/* from video */
+VIDEO_UPDATE( truco );
+PALETTE_INIT( truco );
+
+
+/***************************************************************************/
+
+
+static ADDRESS_MAP_START( readmem, ADDRESS_SPACE_PROGRAM, 8 )
+ AM_RANGE(0x0000, 0x17ff) AM_READ(MRA8_RAM) /* general purpose ram */
+ AM_RANGE(0x1800, 0x7bff) AM_READ(MRA8_RAM) /* video ram */
+ AM_RANGE(0x7c00, 0x7fff) AM_READ(MRA8_RAM) /* battery backed ram */
+ AM_RANGE(0x8000, 0x8000) AM_READ(input_port_0_r) /* controls (and irq ack?) */
+ AM_RANGE(0x8001, 0x8001) AM_READ(MRA8_NOP) /* unknown */
+ AM_RANGE(0x8002, 0x8002) AM_READ(input_port_1_r) /* dipswitches */
+ AM_RANGE(0x8003, 0x8007) AM_READ(MRA8_NOP) /* unknown */
+ AM_RANGE(0x8008, 0xffff) AM_READ(MRA8_ROM)
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START( writemem, ADDRESS_SPACE_PROGRAM, 8 )
+ AM_RANGE(0x0000, 0x17ff) AM_WRITE(MWA8_RAM) /* general purpose ram */
+ AM_RANGE(0x1800, 0x7bff) AM_WRITE(MWA8_RAM) AM_BASE(&videoram) /* video ram */
+ AM_RANGE(0x7c00, 0x7fff) AM_WRITE(MWA8_RAM) AM_BASE(&battery_ram) /* battery backed ram */
+ AM_RANGE(0x8000, 0x8001) AM_WRITE(MWA8_NOP) /* unknown */
+ AM_RANGE(0x8002, 0x8002) AM_WRITE(DAC_0_data_w)
+ AM_RANGE(0x8003, 0x8007) AM_WRITE(MWA8_NOP) /* unknown */
+ AM_RANGE(0x8008, 0xffff) AM_WRITE(MWA8_ROM)
+ADDRESS_MAP_END
+
+static INPUT_PORTS_START( truco )
+ PORT_START /* IN0 */
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNKNOWN )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_UP )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN )
+
+ PORT_START /* DSW1 */
+ PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) )
+ PORT_DIPSETTING ( 0x01, DEF_STR( Off ) )
+ PORT_DIPSETTING ( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x02, 0x02, "Alt. Graphics" )
+ PORT_DIPSETTING ( 0x02, DEF_STR( Off ) )
+ PORT_DIPSETTING ( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) )
+ PORT_DIPSETTING ( 0x04, DEF_STR( Off ) )
+ PORT_DIPSETTING ( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )
+ PORT_DIPSETTING ( 0x08, DEF_STR( Off ) )
+ PORT_DIPSETTING ( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) )
+ PORT_DIPSETTING ( 0x10, DEF_STR( Off ) )
+ PORT_DIPSETTING ( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )
+ PORT_DIPSETTING ( 0x20, DEF_STR( Off ) )
+ PORT_DIPSETTING ( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
+ PORT_DIPSETTING ( 0x40, DEF_STR( Off ) )
+ PORT_DIPSETTING ( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
+ PORT_DIPSETTING ( 0x80, DEF_STR( Off ) )
+ PORT_DIPSETTING ( 0x00, DEF_STR( On ) )
+
+ PORT_START /* IN1 - FAKE - Used for coinup */
+ PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_COIN1 )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )
+INPUT_PORTS_END
+
+static MACHINE_RESET( truco )
+{
+ int a;
+
+ /* Setup the data on the battery backed RAM */
+
+ /* IRQ check */
+ battery_ram[0x002] = 0x51;
+ battery_ram[0x024] = 0x49;
+ battery_ram[0x089] = 0x04;
+ battery_ram[0x170] = 0x12;
+ battery_ram[0x1a8] = 0xd5;
+
+ /* Mainloop check */
+ battery_ram[0x005] = 0x04;
+ battery_ram[0x22B] = 0x46;
+ battery_ram[0x236] = 0xfb;
+ battery_ram[0x2fe] = 0x1D;
+ battery_ram[0x359] = 0x5A;
+
+ /* Boot check */
+ a = ( battery_ram[0x000] << 8 ) | battery_ram[0x001];
+
+ a += 0x4d2;
+
+ battery_ram[0x01d] = ( a >> 8 ) & 0xff;
+ battery_ram[0x01e] = a & 0xff;
+ battery_ram[0x020] = battery_ram[0x011];
+}
+
+static INTERRUPT_GEN( truco_interrupt )
+{
+ /* coinup */
+ static int trigger = 0;
+
+ if ( readinputport( 2 ) & 1 )
+ {
+ if ( trigger == 0 )
+ {
+ cpunum_set_input_line( 0, M6809_IRQ_LINE, PULSE_LINE );
+ trigger++;
+ }
+ } else
+ trigger = 0;
+}
+
+
+static MACHINE_DRIVER_START( truco )
+
+ /* basic machine hardware */
+ MDRV_CPU_ADD(M6809, 750000) /* ?? guess */
+ MDRV_CPU_PROGRAM_MAP(readmem,writemem)
+
+ MDRV_SCREEN_REFRESH_RATE(60)
+ MDRV_SCREEN_VBLANK_TIME(DEFAULT_REAL_60HZ_VBLANK_DURATION)
+ MDRV_CPU_VBLANK_INT(truco_interrupt,1)
+
+ MDRV_MACHINE_RESET(truco)
+
+ /* video hardware */
+ MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
+ MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
+ MDRV_SCREEN_SIZE(256, 192)
+ MDRV_SCREEN_VISIBLE_AREA(0, 256-1, 0, 192-1)
+ MDRV_PALETTE_LENGTH(16)
+
+ MDRV_PALETTE_INIT(truco)
+ MDRV_VIDEO_UPDATE(truco)
+
+ /* sound hardware */
+ MDRV_SPEAKER_STANDARD_MONO("mono")
+
+ MDRV_SOUND_ADD(DAC, 0)
+ MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.80)
+MACHINE_DRIVER_END
+
+
+/***************************************************************************
+
+ Game driver(s)
+
+***************************************************************************/
+
+ROM_START( truco )
+ ROM_REGION( 0x10000, REGION_CPU1, 0 )
+ ROM_LOAD( "truco.u3", 0x08000, 0x4000, CRC(4642fb96) SHA1(e821f6fd582b141a5ca2d5bd53f817697048fb81) )
+ ROM_LOAD( "truco.u2", 0x0c000, 0x4000, CRC(ff355750) SHA1(1538f20b1919928ffca439e4046a104ddfbc756c) )
+ROM_END
+
+GAME( 198?, truco, 0, truco, truco, 0, ROT0, "Playtronic SRL", "Truco-Tron", GAME_IMPERFECT_SOUND )