/***************************************************************************
Jaleco Exerion hardware
****************************************************************************
Exerion is a unique driver in that it has idiosyncracies that are straight
out of Bizarro World. I submit for your approval:
* The mystery reads from $d802 - timer-based protection?
* The freakish graphics encoding scheme, which no other MAME-supported game uses
* The sprite-ram, and all the funky parameters that go along with it
***************************************************************************/
#include "driver.h"
#include "exerion.h"
#include "sound/ay8910.h"
static UINT8 *exerion_ram;
/*************************************
*
* Interrupts & inputs
*
*************************************/
static READ8_HANDLER( exerion_port01_r )
{
/* the cocktail flip bit muxes between ports 0 and 1 */
return exerion_cocktail_flip ? input_port_1_r(offset) : input_port_0_r(offset);
}
static INTERRUPT_GEN( exerion_interrupt )
{
/* Exerion triggers NMIs on coin insertion */
if (readinputport(4) & 1)
cpunum_set_input_line(0, INPUT_LINE_NMI, PULSE_LINE);
}
/*************************************
*
* Protection??
*
*************************************/
/* This is the first of many Exerion "features." No clue if it's */
/* protection or some sort of timer. */
static UINT8 porta;
static UINT8 portb;
static READ8_HANDLER( exerion_porta_r )
{
porta ^= 0x40;
return porta;
}
static WRITE8_HANDLER( exerion_portb_w )
{
/* pull the expected value from the ROM */
porta = memory_region(REGION_CPU1)[0x5f76];
portb = data;
logerror("Port B = %02X\n", data);
}
static READ8_HANDLER( exerion_protection_r )
{
if (activecpu_get_pc() == 0x4143)
return memory_region(REGION_CPU1)[0x33c0 + (exerion_ram[0xd] << 2) + offset];
else
return exerion_ram[0x8 + offset];
}
/*************************************
*
* Main CPU memory handlers
*
*************************************/
static ADDRESS_MAP_START( main_map, ADDRESS_SPACE_PROGRAM, 8 )
AM_RANGE(0x0000, 0x5fff) AM_ROM
AM_RANGE(0x6008, 0x600b) AM_READ(exerion_protection_r)
AM_RANGE(0x6000, 0x67ff) AM_RAM AM_BASE(&exerion_ram)
AM_RANGE(0x8000, 0x87ff) AM_READWRITE(MRA8_RAM, videoram_w) AM_BASE(&videoram) AM_SIZE(&videoram_size)
AM_RANGE(0x8800, 0x887f) AM_RAM AM_BASE(&spriteram) AM_SIZE(&spriteram_size)
AM_RANGE(0x8800, 0x8bff) AM_RAM
AM_RANGE(0xa000, 0xa000) AM_READ(exerion_port01_r)
AM_RANGE(0xa800, 0xa800) AM_READ(input_port_2_r)
AM_RANGE(0xb000, 0xb000) AM_READ(input_port_3_r)
AM_RANGE(0xc000, 0xc000) AM_WRITE(exerion_videoreg_w)
AM_RANGE(0xc800, 0xc800) AM_WRITE(soundlatch_w)
AM_RANGE(0xd000, 0xd000) AM_WRITE(AY8910_control_port_0_w)
AM_RANGE(0xd001, 0xd001) AM_WRITE(AY8910_write_port_0_w)
AM_RANGE(0xd800, 0xd800) AM_WRITE(AY8910_control_port_1_w)
AM_RANGE(0xd801, 0xd801) AM_WRITE(AY8910_write_port_1_w)
AM_RANGE(0xd802, 0xd802) AM_READ(AY8910_read_port_1_r)
ADDRESS_MAP_END
/*************************************
*
* Sub CPU memory handlers
*
*************************************/
static ADDRESS_MAP_START( sub_map, ADDRESS_SPACE_PROGRAM, 8 )
AM_RANGE(0x0000, 0x1fff) AM_ROM
AM_RANGE(0x4000, 0x47ff) AM_RAM
AM_RANGE(0x6000, 0x6000) AM_READ(soundlatch_r)
AM_RANGE(0x8000, 0x800c) AM_WRITE(exerion_video_latch_w)
AM_RANGE(0xa000, 0xa000) AM_READ(exerion_video_timing_r)
ADDRESS_MAP_END
/*************************************
*
* Port definitions
*
*************************************/
static INPUT_PORTS_START( exerion )
PORT_START_TAG("IN0") /* player 1 inputs (muxed on 0xa000) */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(1)
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(1)
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(1)
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(1)
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1)
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START1 )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_START2 )
PORT_START_TAG("IN1") /* player 2 inputs (muxed on 0xa000) */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(2)
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(2)
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(2)
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(2)
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START1 )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_START2 )
PORT_START_TAG("DSW0") /* dip switches (0xa800) */
PORT_DIPNAME( 0x07, 0x02, DEF_STR( Lives ) )
PORT_DIPSETTING( 0x00, "1" )
PORT_DIPSETTING( 0x01, "2" )
PORT_DIPSETTING( 0x02, "3" )
PORT_DIPSETTING( 0x03, "4" )
PORT_DIPSETTING( 0x04, "5" )
PORT_DIPSETTING( 0x07, "Infinite (Cheat)")
PORT_DIPNAME( 0x18, 0x00, DEF_STR( Bonus_Life ) )
PORT_DIPSETTING( 0x00, "10000" )
PORT_DIPSETTING( 0x08, "20000" )
PORT_DIPSETTING( 0x10, "30000" )
PORT_DIPSETTING( 0x18, "40000" )
PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) ) /* used */
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x20, DEF_STR( On ) )
PORT_DIPNAME( 0x40, 0x00, DEF_STR( Difficulty ) )
PORT_DIPSETTING( 0x00, DEF_STR( Easy ) )
PORT_DIPSETTING( 0x40, DEF_STR( Hard ) )
PORT_DIPNAME( 0x80, 0x00, DEF_STR( Cabinet ) )
PORT_DIPSETTING( 0x00, DEF_STR( Upright ) )
PORT_DIPSETTING( 0x80, DEF_STR( Cocktail ) )
PORT_START_TAG("DSW1") /* dip switches/VBLANK (0xb000) */
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_VBLANK )
PORT_DIPNAME( 0x02, 0x00, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x02, DEF_STR( On ) )
PORT_DIPNAME( 0x0c, 0x00, DEF_STR( Coinage ) )
PORT_DIPSETTING( 0x00, DEF_STR( 1C_1C ) )
PORT_DIPSETTING( 0x04, DEF_STR( 1C_2C ) )
PORT_DIPSETTING( 0x08, DEF_STR( 1C_3C ) )
PORT_DIPSETTING( 0x0c, DEF_STR( 1C_4C ) )
PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START_TAG("FAKE") /* FAKE */
/* The coin slots are not memory mapped. */
/* This fake input port is used by the interrupt */
/* handler to be notified of coin insertions. We use IMPULSE to */
/* trigger exactly one interrupt, without having to check when the */
/* user releases the key. */
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_COIN1 ) PORT_IMPULSE(1)
INPUT_PORTS_END
/*************************************
*
* Graphics layouts
*
*************************************/
static const gfx_layout charlayout =
{
8,8,
RGN_FRAC(1,1),
2,
{ 0, 4 },
{ 3, 2, 1, 0, 8+3, 8+2, 8+1, 8+0 },
{ 16*0, 16*1, 16*2, 16*3, 16*4, 16*5, 16*6, 16*7 },
16*8
};
/* 16 x 16 sprites -- requires reorganizing characters in init_exerion() */
static const gfx_layout spritelayout =
{
16,16,
RGN_FRAC(1,1),
2,
{ 0, 4 },
{ 3, 2, 1, 0, 8+3, 8+2, 8+1, 8+0,
16+3, 16+2, 16+1, 16+0, 24+3, 24+2, 24+1, 24+0 },
{ 32*0, 32*1, 32*2, 32*3, 32*4, 32*5, 32*6, 32*7,
32*8, 32*9, 32*10, 32*11, 32*12, 32*13, 32*14, 32*15 },
64*8
};
/* Quick and dirty way to emulate pixel-doubled sprites. */
static const gfx_layout bigspritelayout =
{
32,32,
RGN_FRAC(1,1),
2,
{ 0, 4 },
{ 3, 3, 2, 2, 1, 1, 0, 0,
8+3, 8+3, 8+2, 8+2, 8+1, 8+1, 8+0, 8+0,
16+3, 16+3, 16+2, 16+2, 16+1, 16+1, 16+0, 16+0,
24+3, 24+3, 24+2, 24+2, 24+1, 24+1, 24+0, 24+0 },
{ 32*0, 32*0, 32*1, 32*1, 32*2, 32*2, 32*3, 32*3,
32*4, 32*4, 32*5, 32*5, 32*6, 32*6, 32*7, 32*7,
32*8, 32*8, 32*9, 32*9, 32*10, 32*10, 32*11, 32*11,
32*12, 32*12, 32*13, 32*13, 32*14, 32*14, 32*15, 32*15 },
64*8
};
static GFXDECODE_START( exerion )
GFXDECODE_ENTRY( REGION_GFX1, 0, charlayout, 0, 64 )
GFXDECODE_ENTRY( REGION_GFX2, 0, spritelayout, 256, 64 )
GFXDECODE_ENTRY( REGION_GFX2, 0, bigspritelayout, 256, 64 )
GFXDECODE_END
/*************************************
*
* Sound interfaces
*
*************************************/
static struct AY8910interface ay8910_interface =
{
exerion_porta_r,
0,
0,
exerion_portb_w
};
/*************************************
*
* Machine drivers
*
*************************************/
static MACHINE_DRIVER_START( exerion )
MDRV_CPU_ADD(Z80, EXERION_CPU_CLOCK)
MDRV_CPU_PROGRAM_MAP(main_map,0)
MDRV_CPU_VBLANK_INT(exerion_interrupt,1)
MDRV_CPU_ADD(Z80, EXERION_CPU_CLOCK)
MDRV_CPU_PROGRAM_MAP(sub_map,0)
/* video hardware */
MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
MDRV_SCREEN_RAW_PARAMS(EXERION_PIXEL_CLOCK, EXERION_HTOTAL, EXERION_HBEND, EXERION_HBSTART, EXERION_VTOTAL, EXERION_VBEND, EXERION_VBSTART)
MDRV_GFXDECODE(exerion)
MDRV_PALETTE_LENGTH(32)
MDRV_COLORTABLE_LENGTH(256*3)
MDRV_PALETTE_INIT(exerion)
MDRV_VIDEO_START(exerion)
MDRV_VIDEO_UPDATE(exerion)
/* sound hardware */
MDRV_SPEAKER_STANDARD_MONO("mono")
MDRV_SOUND_ADD(AY8910, EXERION_AY8910_CLOCK)
MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.30)
MDRV_SOUND_ADD(AY8910, EXERION_AY8910_CLOCK)
MDRV_SOUND_CONFIG(ay8910_interface)
MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.30)
MACHINE_DRIVER_END
/*************************************
*
* ROM definitions
*
*************************************/
ROM_START( exerion )
ROM_REGION( 0x6000, REGION_CPU1, 0 )
ROM_LOAD( "exerion.07", 0x0000, 0x2000, CRC(4c78d57d) SHA1(ac702e9ad2bc05493fb1355858667c31c36acfe4) )
ROM_LOAD( "exerion.08", 0x2000, 0x2000, CRC(dcadc1df) SHA1(91388f617cfaa4289ca1c84c697fcfdd8834ae15) )
ROM_LOAD( "exerion.09", 0x4000, 0x2000, CRC(34cc4d14) SHA1(511c9de038f7bcaf6f7c96f2cbbe50a80673fa72) )
ROM_REGION( 0x2000, REGION_CPU2, 0 ) /* 64k for the second CPU */
ROM_LOAD( "exerion.05", 0x0000, 0x2000, CRC(32f6bff5) SHA1(a4d0289f9d1d9eea7ca9a32a0616af48da74b401) )
ROM_REGION( 0x02000, REGION_GFX1, ROMREGION_DISPOSE )
ROM_LOAD( "exerion.06", 0x00000, 0x2000, CRC(435a85a4) SHA1(f6846bfee11df754405d4d796e7d8ac0321b6eb6) ) /* fg chars */
ROM_REGION( 0x04000, REGION_GFX2, ROMREGION_DISPOSE )
ROM_LOAD( "exerion.11", 0x00000, 0x2000, CRC(f0633a09) SHA1(8989bcb12abadde34777f7c189cfa6e2dfe92d62) ) /* sprites */
ROM_LOAD( "exerion.10", 0x02000, 0x2000, CRC(80312de0) SHA1(4fa3bb9d5c62e41a54e8909f8d3b47637137e913) )
ROM_REGION( 0x08000, REGION_GFX3, ROMREGION_DISPOSE )
ROM_LOAD( "exerion.03", 0x00000, 0x2000, CRC(790595b8) SHA1(8016ac2394b25db38e962bcff4805380082f6683) ) /* bg data */
ROM_LOAD( "exerion.04", 0x02000, 0x2000, CRC(d7abd0b9) SHA1(ca6413ecd324cf84e11b703a4eda2c1e6d28ff15) )
ROM_LOAD( "exerion.01", 0x04000, 0x2000, CRC(5bb755cb) SHA1(ec92c518c116a78dbb23381468cefb3f930212cc) )
ROM_LOAD( "exerion.02", 0x06000, 0x2000, CRC(a7ecbb70) SHA1(3c359d5bb21290a45d3eb18fea2b1f9439b931be) )
ROM_REGION( 0x0420, REGION_PROMS, 0 )
ROM_LOAD( "exerion.e1", 0x0000, 0x0020, CRC(2befcc20) SHA1(a24d3f691413378fde545a6ddcef7e5118e74019) ) /* palette */
ROM_LOAD( "exerion.i8", 0x0020, 0x0100, CRC(31db0e08) SHA1(1041a778e86d3fe6f057cf40a0a08b30760f3887) ) /* fg char lookup table */
ROM_LOAD( "exerion.h10", 0x0120, 0x0100, CRC(63b4c555) SHA1(30243041be4fa77ada71e8b29d721cad51640c29) ) /* sprite lookup table */
ROM_LOAD( "exerion.i3", 0x0220, 0x0100, CRC(fe72ab79) SHA1(048a72e6db4768df687df927acaa70ef906b3dc0) ) /* bg char lookup table */
ROM_LOAD( "exerion.k4", 0x0320, 0x0100, CRC(ffc2ba43) SHA1(03be1c41d6ac3fc11439caef04ef5ffa60d6aec4) ) /* bg char mixer */
ROM_END
ROM_START( exeriont )
ROM_REGION( 0x6000, REGION_CPU1, 0 )
ROM_LOAD( "prom5.4p", 0x0000, 0x4000, CRC(58b4dc1b) SHA1(3e34d1eda0b0537dac1062e96259d4cc7c64049c) )
ROM_LOAD( "prom6.4s", 0x4000, 0x2000, CRC(fca18c2d) SHA1(31077dada3ed4aa2e26af933f589e01e0c71e5cd) )
ROM_REGION( 0x2000, REGION_CPU2, 0 ) /* 64k for the second CPU */
ROM_LOAD( "exerion.05", 0x0000, 0x2000, CRC(32f6bff5) SHA1(a4d0289f9d1d9eea7ca9a32a0616af48da74b401) )
ROM_REGION( 0x02000, REGION_GFX1, ROMREGION_DISPOSE )
ROM_LOAD( "exerion.06", 0x00000, 0x2000, CRC(435a85a4) SHA1(f6846bfee11df754405d4d796e7d8ac0321b6eb6) ) /* fg chars */
ROM_REGION( 0x04000, REGION_GFX2, ROMREGION_DISPOSE )
ROM_LOAD( "exerion.11", 0x00000, 0x2000, CRC(f0633a09) SHA1(8989bcb12abadde34777f7c189cfa6e2dfe92d62) ) /* sprites */
ROM_LOAD( "exerion.10", 0x02000, 0x2000, CRC(80312de0) SHA1(4fa3bb9d5c62e41a54e8909f8d3b47637137e913) )
ROM_REGION( 0x08000, REGION_GFX3, ROMREGION_DISPOSE )
ROM_LOAD( "exerion.03", 0x00000, 0x2000, CRC(790595b8) SHA1(8016ac2394b25db38e962bcff4805380082f6683) ) /* bg data */
ROM_LOAD( "exerion.04", 0x02000, 0x2000, CRC(d7abd0b9) SHA1(ca6413ecd324cf84e11b703a4eda2c1e6d28ff15) )
ROM_LOAD( "exerion.01", 0x04000, 0x2000, CRC(5bb755cb) SHA1(ec92c518c116a78dbb23381468cefb3f930212cc) )
ROM_LOAD( "exerion.02", 0x06000, 0x2000, CRC(a7ecbb70) SHA1(3c359d5bb21290a45d3eb18fea2b1f9439b931be) )
ROM_REGION( 0x0420, REGION_PROMS, 0 )
ROM_LOAD( "exerion.e1", 0x0000, 0x0020, CRC(2befcc20) SHA1(a24d3f691413378fde545a6ddcef7e5118e74019) ) /* palette */
ROM_LOAD( "exerion.i8", 0x0020, 0x0100, CRC(31db0e08) SHA1(1041a778e86d3fe6f057cf40a0a08b30760f3887) ) /* fg char lookup table */
ROM_LOAD( "exerion.h10", 0x0120, 0x0100, CRC(63b4c555) SHA1(30243041be4fa77ada71e8b29d721cad51640c29) ) /* sprite lookup table */
ROM_LOAD( "exerion.i3", 0x0220, 0x0100, CRC(fe72ab79) SHA1(048a72e6db4768df687df927acaa70ef906b3dc0) ) /* bg char lookup table */
ROM_LOAD( "exerion.k4", 0x0320, 0x0100, CRC(ffc2ba43) SHA1(03be1c41d6ac3fc11439caef04ef5ffa60d6aec4) ) /* bg char mixer */
ROM_END
ROM_START( exerionb )
ROM_REGION( 0x6000, REGION_CPU1, 0 )
ROM_LOAD( "eb5.bin", 0x0000, 0x4000, CRC(da175855) SHA1(11ea46fd1d504e16e5ffc604d74c1ce210d6be1c) )
ROM_LOAD( "eb6.bin", 0x4000, 0x2000, CRC(0dbe2eff) SHA1(5b0e5e8453619beec46c4350d1b2ed571fe3dc24) )
ROM_REGION( 0x2000, REGION_CPU2, 0 ) /* 64k for the second CPU */
ROM_LOAD( "exerion.05", 0x0000, 0x2000, CRC(32f6bff5) SHA1(a4d0289f9d1d9eea7ca9a32a0616af48da74b401) )
ROM_REGION( 0x02000, REGION_GFX1, ROMREGION_DISPOSE )
ROM_LOAD( "exerion.06", 0x00000, 0x2000, CRC(435a85a4) SHA1(f6846bfee11df754405d4d796e7d8ac0321b6eb6) ) /* fg chars */
ROM_REGION( 0x04000, REGION_GFX2, ROMREGION_DISPOSE )
ROM_LOAD( "exerion.11", 0x00000, 0x2000, CRC(f0633a09) SHA1(8989bcb12abadde34777f7c189cfa6e2dfe92d62) ) /* sprites */
ROM_LOAD( "exerion.10", 0x02000, 0x2000, CRC(80312de0) SHA1(4fa3bb9d5c62e41a54e8909f8d3b47637137e913) )
ROM_REGION( 0x08000, REGION_GFX3, ROMREGION_DISPOSE )
ROM_LOAD( "exerion.03", 0x00000, 0x2000, CRC(790595b8) SHA1(8016ac2394b25db38e962bcff4805380082f6683) ) /* bg data */
ROM_LOAD( "exerion.04", 0x02000, 0x2000, CRC(d7abd0b9) SHA1(ca6413ecd324cf84e11b703a4eda2c1e6d28ff15) )
ROM_LOAD( "exerion.01", 0x04000, 0x2000, CRC(5bb755cb) SHA1(ec92c518c116a78dbb23381468cefb3f930212cc) )
ROM_LOAD( "exerion.02", 0x06000, 0x2000, CRC(a7ecbb70) SHA1(3c359d5bb21290a45d3eb18fea2b1f9439b931be) )
ROM_REGION( 0x0420, REGION_PROMS, 0 )
ROM_LOAD( "exerion.e1", 0x0000, 0x0020, CRC(2befcc20) SHA1(a24d3f691413378fde545a6ddcef7e5118e74019) ) /* palette */
ROM_LOAD( "exerion.i8", 0x0020, 0x0100, CRC(31db0e08) SHA1(1041a778e86d3fe6f057cf40a0a08b30760f3887) ) /* fg char lookup table */
ROM_LOAD( "exerion.h10", 0x0120, 0x0100, CRC(63b4c555) SHA1(30243041be4fa77ada71e8b29d721cad51640c29) ) /* sprite lookup table */
ROM_LOAD( "exerion.i3", 0x0220, 0x0100, CRC(fe72ab79) SHA1(048a72e6db4768df687df927acaa70ef906b3dc0) ) /* bg char lookup table */
ROM_LOAD( "exerion.k4", 0x0320, 0x0100, CRC(ffc2ba43) SHA1(03be1c41d6ac3fc11439caef04ef5ffa60d6aec4) ) /* bg char mixer */
ROM_END
/*************************************
*
* Driver initialization
*
*************************************/
static DRIVER_INIT( exerion )
{
UINT32 oldaddr, newaddr, length;
UINT8 *src, *dst, *temp;
/* allocate some temporary space */
temp = malloc_or_die(0x10000);
/* make a temporary copy of the character data */
src = temp;
dst = memory_region(REGION_GFX1);
length = memory_region_length(REGION_GFX1);
memcpy(src, dst, length);
/* decode the characters */
/* the bits in the ROM are ordered: n8-n7 n6 n5 n4-v2 v1 v0 n3-n2 n1 n0 h2 */
/* we want them ordered like this: n8-n7 n6 n5 n4-n3 n2 n1 n0-v2 v1 v0 h2 */
for (oldaddr = 0; oldaddr < length; oldaddr++)
{
newaddr = ((oldaddr ) & 0x1f00) | /* keep n8-n4 */
((oldaddr << 3) & 0x00f0) | /* move n3-n0 */
((oldaddr >> 4) & 0x000e) | /* move v2-v0 */
((oldaddr ) & 0x0001); /* keep h2 */
dst[newaddr] = src[oldaddr];
}
/* make a temporary copy of the sprite data */
src = temp;
dst = memory_region(REGION_GFX2);
length = memory_region_length(REGION_GFX2);
memcpy(src, dst, length);
/* decode the sprites */
/* the bits in the ROMs are ordered: n9 n8 n3 n7-n6 n5 n4 v3-v2 v1 v0 n2-n1 n0 h3 h2 */
/* we want them ordered like this: n9 n8 n7 n6-n5 n4 n3 n2-n1 n0 v3 v2-v1 v0 h3 h2 */
for (oldaddr = 0; oldaddr < length; oldaddr++)
{
newaddr = ((oldaddr << 1) & 0x3c00) | /* move n7-n4 */
((oldaddr >> 4) & 0x0200) | /* move n3 */
((oldaddr << 4) & 0x01c0) | /* move n2-n0 */
((oldaddr >> 3) & 0x003c) | /* move v3-v0 */
((oldaddr ) & 0xc003); /* keep n9-n8 h3-h2 */
dst[newaddr] = src[oldaddr];
}
free(temp);
}
static DRIVER_INIT( exerionb )
{
UINT8 *ram = memory_region(REGION_CPU1);
int addr;
/* the program ROMs have data lines D1 and D2 swapped. Decode them. */
for (addr = 0; addr < 0x6000; addr++)
ram[addr] = (ram[addr] & 0xf9) | ((ram[addr] & 2) << 1) | ((ram[addr] & 4) >> 1);
/* also convert the gfx as in Exerion */
driver_init_exerion(machine);
}
/*************************************
*
* Game drivers
*
*************************************/
GAME( 1983, exerion, 0, exerion, exerion, exerion, ROT90, "Jaleco", "Exerion", 0 )
GAME( 1983, exeriont, exerion, exerion, exerion, exerion, ROT90, "Jaleco (Taito America license)", "Exerion (Taito)", 0 )
GAME( 1983, exerionb, exerion, exerion, exerion, exerionb, ROT90, "Jaleco", "Exerion (bootleg)", 0 )