diff options
Diffstat (limited to 'src/mame/drivers/truco.c')
-rw-r--r-- | src/mame/drivers/truco.c | 190 |
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 ) |