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/***************************************************************************
XOR WORLD (c) 1990 Gaelco
Driver by Manuel Abadia <manu@teleline.es>
Memory Map:
-----------
0x000000-0x01ffff ROM
0x200000-0x200001 Input #1
0x400000-0x400001 Input #2
0x600000-0x600001 DIPSW #1 + EEPROM read
0x800000-0x800001 Philips SAA1099P write register
0x800002-0x800003 Philips SAA1099P control register
0xa00008-0xa0000d EEPROM write/ctrl
0xffc000-0xffc7ff Screen (8x8 tiles 32x32 (256x256))
0xffc800-0xffc87f Sprite RAM
0xffc884-0xffffff Work RAM
Interrupts:
Level 2 INT updates the timer
Level 6 INT drives the game
Unmapped addresses in the driver:
0xffc800-0xffc801 INT 2 ACK\Watchdog timer
0xffc802-0xffc803 INT 6 ACK/Watchdog timer
EEPROM chip: 93C46
***************************************************************************/
#include "driver.h"
#include "machine/eeprom.h"
#include "cpu/m68000/m68000.h"
#include "sound/saa1099.h"
extern WRITE16_HANDLER(xorworld_videoram16_w);
extern PALETTE_INIT( xorworld );
extern VIDEO_START( xorworld );
extern VIDEO_UPDATE( xorworld );
/****************************************************************
NVRAM load/save/init
****************************************************************/
static NVRAM_HANDLER( xorworld )
{
if (read_or_write)
{
EEPROM_save(file);
}
else
{
EEPROM_init(&eeprom_interface_93C46);
if (file)
{
EEPROM_load(file);
}
}
}
/****************************************************************
Init machine
****************************************************************/
/****************************************************************
EEPROM read/write/control
****************************************************************/
/* the EEPROM is read thru bit 4 */
static READ16_HANDLER( xorworld_input_r )
{
return readinputport(0) | ((EEPROM_read_bit() & 0x01) << 4);
}
static WRITE16_HANDLER( eeprom_chip_select_w )
{
/* bit 0 is CS (active low) */
EEPROM_set_cs_line((data & 0x01) ? CLEAR_LINE : ASSERT_LINE);
}
static WRITE16_HANDLER( eeprom_serial_clock_w )
{
/* bit 0 is SK (active high) */
EEPROM_set_clock_line((data & 0x01) ? ASSERT_LINE : CLEAR_LINE);
}
static WRITE16_HANDLER( eeprom_data_w )
{
/* bit 0 is EEPROM data (DIN) */
EEPROM_write_bit(data & 0x01);
}
static ADDRESS_MAP_START( xorworld_map, ADDRESS_SPACE_PROGRAM, 16 )
AM_RANGE(0x000000, 0x01ffff) AM_ROM
AM_RANGE(0x200000, 0x200001) AM_READ(input_port_1_word_r)
AM_RANGE(0x400000, 0x400001) AM_READ(input_port_2_word_r)
AM_RANGE(0x600000, 0x600001) AM_READ(xorworld_input_r) // DIPSW #1 + EEPROM data
AM_RANGE(0x800000, 0x800001) AM_WRITE(saa1099_write_port_0_lsb_w)
AM_RANGE(0x800002, 0x800003) AM_WRITE(saa1099_control_port_0_lsb_w)
AM_RANGE(0xa00008, 0xa00009) AM_WRITE(eeprom_chip_select_w)
AM_RANGE(0xa0000a, 0xa0000b) AM_WRITE(eeprom_serial_clock_w)
AM_RANGE(0xa0000c, 0xa0000d) AM_WRITE(eeprom_data_w)
AM_RANGE(0xffc000, 0xffc7ff) AM_RAM AM_WRITE(xorworld_videoram16_w) AM_BASE(&videoram16)
AM_RANGE(0xffc800, 0xffc87f) AM_RAM AM_BASE(&spriteram16)
AM_RANGE(0xffc880, 0xffc881) AM_WRITENOP
AM_RANGE(0xffc882, 0xffc883) AM_WRITENOP
AM_RANGE(0xffc884, 0xffffff) AM_RAM
ADDRESS_MAP_END
static INPUT_PORTS_START( xorworld )
PORT_START // DSW0
PORT_DIPNAME( 0x07, 0x07, DEF_STR( Coinage ) )
PORT_DIPSETTING( 0x00, DEF_STR( 3C_1C ) )
PORT_DIPSETTING( 0x01, DEF_STR( 2C_2C ) )
PORT_DIPSETTING( 0x07, DEF_STR( 1C_1C ) )
PORT_DIPSETTING( 0x06, DEF_STR( 1C_2C ) )
PORT_DIPSETTING( 0x05, DEF_STR( 1C_3C ) )
PORT_DIPSETTING( 0x04, DEF_STR( 1C_4C ) )
PORT_DIPSETTING( 0x03, DEF_STR( 1C_5C ) )
PORT_DIPSETTING( 0x02, DEF_STR( 1C_6C ) )
PORT_DIPNAME( 0x08, 0x00, DEF_STR( Demo_Sounds ) )
PORT_DIPSETTING( 0x08, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
//PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_SPECIAL ) // used for accessing the NVRAM
PORT_DIPNAME( 0x60, 0x40, DEF_STR( Difficulty ) )
PORT_DIPSETTING( 0x40, DEF_STR( Easy ) )
PORT_DIPSETTING( 0x60, DEF_STR( Normal ) )
PORT_DIPSETTING( 0x20, DEF_STR( Hard ) )
PORT_DIPSETTING( 0x00, DEF_STR( Hardest ) )
PORT_SERVICE( 0x80, IP_ACTIVE_LOW )
PORT_START // IN0
PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(1)
PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(1)
PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(1)
PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(1)
PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1) // xor
PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1) // rotate
PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_COIN1 )
PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_COIN2 )
PORT_START // IN1
PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(2)
PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(2)
PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(2)
PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(2)
PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_START1 )
PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_START2 )
INPUT_PORTS_END
static const gfx_layout tilelayout =
{
8,8, /* 8x8 tiles */
0x10000/16, /* 4096 tiles */
4, /* 4 bpp */
{ 1*0x10000*8, 1*0x10000*8+4, 0, 4 }, /* plane offsets */
{ 0*8, 0*8+1, 0*8+2, 0*8+3, 1*8+0, 1*8+1, 1*8+2, 1*8+3 },
{ 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16 },
16*8
};
static const gfx_layout spritelayout =
{
16,16, /* 16x16 sprites */
0x10000/64, /* 1024 sprites */
4, /* 4 bpp */
{ 1*0x10000*8, 1*0x10000*8+4, 0, 4 }, /* plane offsets */
{ 0*8, 0*8+1, 0*8+2, 0*8+3, 1*8+0, 1*8+1, 1*8+2, 1*8+3,
32*8+0, 32*8+1, 32*8+2, 32*8+3, 33*8+0, 33*8+1, 33*8+2, 33*8+3},
{ 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16,
8*16, 9*16, 10*16, 11*16, 12*16, 13*16, 14*16, 15*16 },
64*8
};
static GFXDECODE_START( xorworld )
GFXDECODE_ENTRY( REGION_GFX1, 0x000000, tilelayout, 0, 64 )
GFXDECODE_ENTRY( REGION_GFX1, 0x000000, spritelayout, 0, 64 )
GFXDECODE_END
static INTERRUPT_GEN( xorworld_interrupt )
{
if (cpu_getiloops() == 0)
{
cpunum_set_input_line(0, 2, HOLD_LINE);
}
else if (cpu_getiloops() % 2)
{
cpunum_set_input_line(0, 6, HOLD_LINE);
}
}
static MACHINE_DRIVER_START( xorworld )
// basic machine hardware
MDRV_CPU_ADD(M68000, 10000000) // 10 MHz
MDRV_CPU_PROGRAM_MAP(xorworld_map, 0)
MDRV_CPU_VBLANK_INT(xorworld_interrupt, 4) // 1 IRQ2 + 1 IRQ4 + 1 IRQ6
MDRV_SCREEN_REFRESH_RATE(60)
MDRV_SCREEN_VBLANK_TIME(DEFAULT_REAL_60HZ_VBLANK_DURATION)
MDRV_INTERLEAVE(1)
MDRV_NVRAM_HANDLER(xorworld)
// video hardware
MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
MDRV_SCREEN_SIZE(32*8, 32*8)
MDRV_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 2*8, 30*8-1)
MDRV_GFXDECODE(xorworld)
MDRV_PALETTE_LENGTH(256)
MDRV_PALETTE_INIT(xorworld)
MDRV_VIDEO_START(xorworld)
MDRV_VIDEO_UPDATE(xorworld)
// sound hardware
MDRV_SPEAKER_STANDARD_MONO("mono")
MDRV_SOUND_ADD(SAA1099, 8000000 /* guess */)
MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_DRIVER_END
ROM_START( xorworld )
ROM_REGION( 0x100000, REGION_CPU1, 0 ) /* 68000 code */
ROM_LOAD16_BYTE( "c13.bin", 0x000000, 0x010000, CRC(615a864d) SHA1(db07eef19d26a4daa0bcc17ac24d237483f93bf6) )
ROM_LOAD16_BYTE( "b13.bin", 0x000001, 0x010000, CRC(632e8ee5) SHA1(ec53e632c762f72ad1fe3fab85111bdcc1e818ae) )
ROM_REGION( 0x020000, REGION_GFX1, ROMREGION_DISPOSE )
ROM_LOAD( "d9.bin", 0x000000, 0x010000, CRC(da8d4d65) SHA1(41bcc15f26066bd820b44c0f258e70d0102953c9) )
ROM_LOAD( "d10.bin", 0x010000, 0x010000, CRC(3b1d6f24) SHA1(bedf60a4cbf20492b8a846b6a7b578f8fe8dbde9) )
ROM_REGION( 0x0300, REGION_PROMS, 0 )
ROM_LOAD( "b4.bin", 0x0000, 0x0100, CRC(75e468af) SHA1(b5fd1a086c27ca2e837cbbf1b7e57dfdd369b0d0) ) /* Red palette ROM (4 bits) */
ROM_LOAD( "b7.bin", 0x0100, 0x0100, CRC(7e1cd146) SHA1(fd26a28f90c50ffcb0fe7718820c81eb9fe79e66) ) /* Green palette ROM (4 bits) */
ROM_LOAD( "b5.bin", 0x0200, 0x0100, CRC(c1b9d9f9) SHA1(c4b02bf60db449fb308a5eb3e41c43299ad8e3e3) ) /* Blue palette ROM (4 bits) */
ROM_END
#define PATCH(data) *rom = data; rom++
static DRIVER_INIT( xorworld )
{
/* patch some strange protection (without this, strange characters appear
after level 5 and some pieces don't rotate properly some times) */
UINT16 *rom = (UINT16 *)(memory_region(REGION_CPU1) + 0x1390);
PATCH(0x4239); PATCH(0x00ff); PATCH(0xe196); /* clr.b $ffe196 */
PATCH(0x4239); PATCH(0x00ff); PATCH(0xe197); /* clr.b $ffe197 */
PATCH(0x4239); PATCH(0x00ff); PATCH(0xe0bc); /* clr.b $ffe0bc */
PATCH(0x41f9); PATCH(0x00ff); PATCH(0xcfce); /* lea $ffcfce,A0 */
PATCH(0x3e3c); PATCH(0x000f); /* move #$f,D7 */
PATCH(0x4218); /* clr.b (A0)+ */
PATCH(0x51cf); PATCH(0xfffc); /* dbra D7,$13ac */
PATCH(0x4e75); /* rts */
PATCH(0x31ff); /* adjust checksum */
}
GAME( 1990, xorworld, 0, xorworld, xorworld, xorworld, ROT0, "Gaelco", "Xor World (prototype)", 0 )
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