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Diffstat (limited to 'src/mame/drivers/exerion.cpp')
-rw-r--r-- | src/mame/drivers/exerion.cpp | 577 |
1 files changed, 577 insertions, 0 deletions
diff --git a/src/mame/drivers/exerion.cpp b/src/mame/drivers/exerion.cpp new file mode 100644 index 00000000000..611a6d4c5d9 --- /dev/null +++ b/src/mame/drivers/exerion.cpp @@ -0,0 +1,577 @@ +// license:BSD-3-Clause +// copyright-holders:Aaron Giles +/*************************************************************************** + + 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 + + +Stephh's notes (based on the games Z80 code and some tests) : + +1) 'exerion' + + - The coin insertion routine (code at 0x0066) is buggy as you get a credit + on first coin after initialisation even if you need more than 1 coin for 1 credit : + * when coinage is set to 2C_1C, you get a credit when inserting + 1, 2, 4, 6 ... multiples of 2 coins + * when coinage is set to 3C_1C, you get a credit when inserting + 1, 3, 6, 9 ... multiples of 3 coins + * when coinage is set to 4C_1C, you get a credit when inserting + 1, 4, 8, 12 ... multiples of 4 coins + * when coinage is set to 5C_1C, you get a credit when inserting + 1, 5, 10, 15 ... multiples of 5 coins + - According to the Dip Switches sheet, difficulty is handled by DSW0 bits 5 and 6. + In fact, bit 6 determines the overall difficulty (0x40 = OFF easy - 0x00 = ON hard) + while bit 5 determines enemies' number of bullets (0x20 = OFF for less bullets and + 0x00 = ON for more bullets). + - When starting a 1 or 2 players game, 2 checksums are computed (code at 0x00e4) : + one from 0x05f0 to 0x06ee (stored at 0x6030), one from 0x00d8 to 0x01d6 (stored + at 0x6031). Contents of 0x0625 is also stored to 0x6032. + - Each time before attract mode sequence starts, a checksum is computed from 0x0000 + to 0x1fff (code at 0x28b8) if 17th score in the high-score table is not 0. + If checksum doesn't match the hardcoded value (0xb5), you get one more credit + and you are allowed to continue the game with an extra life (score, charge and + level are not reset to original values). + - At the beginning of each life of each player, a checksum is computed from 0x4100 + to 0x4dff (code at 0x07d8) if 1st score in the high-score table is >= 80000. + If checksum doesn't match the hardcoded value (0x63), you get 255 credits ! + Notice that the displayed number of credits won't be correct as the game + isn't suppose to allow more than 9 credits. + - In a 2 players game, when player changes, if player it was player 2 turn, + values from 0x6030 to 0x6032 (see above) are compared with hard-coded values + (code at 0x04c8). If they don't match respectively 0xfe, 0xb3 and 0x4c, + and if 9th score in the high-score table is not 0, the game resets ! + - Before entering player's initials, a checksum is computed from 0x5f00 to 0x5fff + (code at 0x5bd0) if player has reached level 6 (2nd kind of enemies after bonus + stage). If checksum doesn't match the hardcoded value (0x9a), the game resets ! + - There is sort of protection routine at 0x4120 which has an effect when + player loses a life on reaching first bonus stage or after. If values read + from 0x6008 to 0x600b don't match values from ROM area 0x33c0-0x33ff, + the game resets. See 'exerion_protection_r' read handler. + - There is an unknown routine at 0x5f70 which is called when the game boots + which reads value from 0x600c and see if it matches a hardcoded value (0xbe). + If they don't match, the game resets after displaying the high-scores table. + - There is another unknown routine at 0x414e which is called when a game is over + which reads value from 0x600c and see if it matches value from ROM area + 0x4000-0x400f based on internal timer value for a game at 0x604a. If they don't + match, its only effect is to set lives to 0, which is always the case when the + game is over, so it doesn't seem to have any real effect. + Was it supposed to be called at another time ? + - The routine at 0x5f90 writes to addresses 0x6008-0x600c values read from AY port A + (one write after one read). This routine is called by the 2 unknown routines. + +2) 'exeriont' + + - The coin insertion routine is fixed in this set (see the subttle changes + in the code from 0x0077 to 0x0082). + - The routine at 0x28b8 is the same as in 'exerion' (same hardcoded value). + - The routine at 0x07d8 is the same as in 'exerion' (same hardcoded value). + - The routine at 0x04c8 is the same as in 'exerion' (same hardcoded values). + - The routine at 0x5bd0 is the same as in 'exerion' (same hardcoded value). + - The routine at 0x4120 is the same as in 'exerion', but data from 0x33c0 to 0x33ff + is slightly different : + + address exerion exeriont + 0x33c1: 0x3e 0x36 + 0x33c2: 0x37 0x32 + 0x33c8: 0x76 0x7e + 0x33ca: 0x32 0x26 + 0x33cb: 0x34 0x1e + 0x33d5: 0x07 0x3f + 0x33fc: 0x76 0x40 + 0x33fd: 0x37 0x00 + 0x33fe: 0x32 0x00 + 0x33ff: 0x26 0x00 + + - The routine at 0x5f70 is similar to the one in 'exerion' (hardcoded value = 0x9e). + - The routine at 0x414e is the same as in 'exerion', but data from 0x4000 to 0x400f + is slightly different : + + address exerion exeriont + 0x4002: 0xb2 0x9e + 0x400f: 0xbe 0x9e + + - The routine at 0x5f90 is the same as in 'exerion'. + +3) 'exerionb' + + - This set is based on 'exerion' as the coin insertion routine at 0x0066 + (and as a consequence the bug) is the same. + - The routine at 0x28b8 has been patched, so you can never see the "continue" feature. + - The routine at 0x07d8 has been patched, so you can never get 255 credits. + - The routine at 0x04c8 and the computed values from 0x6030 to 0x6032 are surprisingly + the same as in 'exerion'. + - The routine at 0x5bd0 has been patched, so the game can't reset. + - The "protection" routine at 0x4120 has been patched, so the game can't reset. + - The first unknown routine at 0x5f70 has been patched, so the game can't reset. + - The second unknown routine at 0x414e has been patched, so lives can't be set to 0. + - The routine at 0x5f90 is completely different : it reads values from AY port A, + but nothing is written to addresses 0x6008-0x600c, and there are lots of writes + to AY port B (0xd001) due to extra code at 0x0050 and extra data at 0x0040. + +***************************************************************************/ + +#include "emu.h" +#include "cpu/z80/z80.h" +#include "includes/exerion.h" +#include "sound/ay8910.h" + + +/************************************* + * + * Interrupts & inputs + * + *************************************/ + +/* Players inputs are muxed at 0xa000 */ +CUSTOM_INPUT_MEMBER(exerion_state::exerion_controls_r) +{ + static const char *const inname[2] = { "P1", "P2" }; + return ioport(inname[m_cocktail_flip])->read() & 0x3f; +} + + +INPUT_CHANGED_MEMBER(exerion_state::coin_inserted) +{ + /* coin insertion causes an NMI */ + m_maincpu->set_input_line(INPUT_LINE_NMI, newval ? CLEAR_LINE : ASSERT_LINE); +} + + + +/************************************* + * + * Protection?? + * + *************************************/ + +/* This is the first of many Exerion "features". No clue if it's */ +/* protection or some sort of timer. */ +READ8_MEMBER(exerion_state::exerion_porta_r) +{ + m_porta ^= 0x40; + return m_porta; +} + + +WRITE8_MEMBER(exerion_state::exerion_portb_w) +{ + /* pull the expected value from the ROM */ + m_porta = memregion("maincpu")->base()[0x5f76]; + m_portb = data; + + logerror("Port B = %02X\n", data); +} + + +READ8_MEMBER(exerion_state::exerion_protection_r) +{ + if (space.device().safe_pc() == 0x4143) + return memregion("maincpu")->base()[0x33c0 + (m_main_ram[0xd] << 2) + offset]; + else + return m_main_ram[0x8 + offset]; +} + + + +/************************************* + * + * Main CPU memory handlers + * + *************************************/ + +static ADDRESS_MAP_START( main_map, AS_PROGRAM, 8, exerion_state ) + AM_RANGE(0x0000, 0x5fff) AM_ROM + AM_RANGE(0x6008, 0x600b) AM_READ(exerion_protection_r) + AM_RANGE(0x6000, 0x67ff) AM_RAM AM_SHARE("main_ram") + AM_RANGE(0x8000, 0x87ff) AM_RAM AM_SHARE("videoram") + AM_RANGE(0x8800, 0x887f) AM_RAM AM_SHARE("spriteram") + AM_RANGE(0x8800, 0x8bff) AM_RAM + AM_RANGE(0xa000, 0xa000) AM_READ_PORT("IN0") + AM_RANGE(0xa800, 0xa800) AM_READ_PORT("DSW0") + AM_RANGE(0xb000, 0xb000) AM_READ_PORT("DSW1") + AM_RANGE(0xc000, 0xc000) AM_WRITE(exerion_videoreg_w) + AM_RANGE(0xc800, 0xc800) AM_WRITE(soundlatch_byte_w) + AM_RANGE(0xd000, 0xd001) AM_DEVWRITE("ay1", ay8910_device, address_data_w) + AM_RANGE(0xd800, 0xd801) AM_DEVWRITE("ay2", ay8910_device, address_data_w) + AM_RANGE(0xd802, 0xd802) AM_DEVREAD("ay2", ay8910_device, data_r) +ADDRESS_MAP_END + + + +/************************************* + * + * Sub CPU memory handlers + * + *************************************/ + +static ADDRESS_MAP_START( sub_map, AS_PROGRAM, 8, exerion_state ) + AM_RANGE(0x0000, 0x1fff) AM_ROM + AM_RANGE(0x4000, 0x47ff) AM_RAM + AM_RANGE(0x6000, 0x6000) AM_READ(soundlatch_byte_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 + * + *************************************/ + +/* verified from Z80 code */ +static INPUT_PORTS_START( exerion ) + PORT_START("IN0") + PORT_BIT( 0x3f, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM_MEMBER(DEVICE_SELF, exerion_state,exerion_controls_r, (void *)0) + PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START1 ) + PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_START2 ) + + PORT_START("DSW0") + 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( 0x05, "5" ) /* duplicated setting */ +// PORT_DIPSETTING( 0x06, "5" ) /* duplicated setting */ + PORT_DIPSETTING( 0x07, "254 (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( 0x60, 0x00, DEF_STR( Difficulty ) ) /* see notes */ + PORT_DIPSETTING( 0x00, DEF_STR( Easy ) ) + PORT_DIPSETTING( 0x20, DEF_STR( Medium ) ) + PORT_DIPSETTING( 0x40, DEF_STR( Hard ) ) + PORT_DIPSETTING( 0x60, DEF_STR( Hardest ) ) + PORT_DIPNAME( 0x80, 0x00, DEF_STR( Cabinet ) ) + PORT_DIPSETTING( 0x00, DEF_STR( Upright ) ) + PORT_DIPSETTING( 0x80, DEF_STR( Cocktail ) ) + + PORT_START("DSW1") + PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_VBLANK("screen") + PORT_DIPNAME( 0x0e, 0x00, DEF_STR( Coinage ) ) /* see notes */ + PORT_DIPSETTING( 0x0e, DEF_STR( 5C_1C ) ) + PORT_DIPSETTING( 0x0a, DEF_STR( 4C_1C ) ) + PORT_DIPSETTING( 0x06, DEF_STR( 3C_1C ) ) + PORT_DIPSETTING( 0x02, DEF_STR( 2C_1C ) ) + 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("COIN") + PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_COIN1 ) PORT_CHANGED_MEMBER(DEVICE_SELF, exerion_state,coin_inserted, 0) + + PORT_START("P1") /* fake input port */ + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) + PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) + + PORT_START("P2") /* fake input port */ + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_COCKTAIL + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_COCKTAIL + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_COCKTAIL + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL + PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_COCKTAIL +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 +}; + + +static GFXDECODE_START( exerion ) + GFXDECODE_ENTRY( "gfx1", 0, charlayout, 0, 64 ) + GFXDECODE_ENTRY( "gfx2", 0, spritelayout, 256, 64 ) + GFXDECODE_SCALE( "gfx2", 0, spritelayout, 256, 64, 2, 2 ) +GFXDECODE_END + + +/************************************* + * + * Machine drivers + * + *************************************/ + +void exerion_state::machine_start() +{ + save_item(NAME(m_porta)); + save_item(NAME(m_portb)); + save_item(NAME(m_cocktail_flip)); + save_item(NAME(m_char_palette)); + save_item(NAME(m_sprite_palette)); + save_item(NAME(m_char_bank)); + save_item(NAME(m_background_latches)); +} + +void exerion_state::machine_reset() +{ + int i; + + m_porta = 0; + m_portb = 0; + m_cocktail_flip = 0; + m_char_palette = 0; + m_sprite_palette = 0; + m_char_bank = 0; + + for (i = 0; i < 13; i++) + m_background_latches[i] = 0; +} + +static MACHINE_CONFIG_START( exerion, exerion_state ) + + MCFG_CPU_ADD("maincpu", Z80, EXERION_CPU_CLOCK) + MCFG_CPU_PROGRAM_MAP(main_map) + + MCFG_CPU_ADD("sub", Z80, EXERION_CPU_CLOCK) + MCFG_CPU_PROGRAM_MAP(sub_map) + + + /* video hardware */ + MCFG_SCREEN_ADD("screen", RASTER) + MCFG_SCREEN_RAW_PARAMS(EXERION_PIXEL_CLOCK, EXERION_HTOTAL, EXERION_HBEND, EXERION_HBSTART, EXERION_VTOTAL, EXERION_VBEND, EXERION_VBSTART) + MCFG_SCREEN_UPDATE_DRIVER(exerion_state, screen_update_exerion) + MCFG_SCREEN_PALETTE("palette") + + MCFG_GFXDECODE_ADD("gfxdecode", "palette", exerion) + MCFG_PALETTE_ADD("palette", 256*3) + MCFG_PALETTE_INDIRECT_ENTRIES(32) + MCFG_PALETTE_INIT_OWNER(exerion_state, exerion) + + /* audio hardware */ + MCFG_SPEAKER_STANDARD_MONO("mono") + + MCFG_SOUND_ADD("ay1", AY8910, EXERION_AY8910_CLOCK) + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.30) + + MCFG_SOUND_ADD("ay2", AY8910, EXERION_AY8910_CLOCK) + MCFG_AY8910_PORT_A_READ_CB(READ8(exerion_state, exerion_porta_r)) + MCFG_AY8910_PORT_B_WRITE_CB(WRITE8(exerion_state, exerion_portb_w)) + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.30) +MACHINE_CONFIG_END + + + +/************************************* + * + * ROM definitions + * + *************************************/ + +ROM_START( exerion ) + ROM_REGION( 0x6000, "maincpu", 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, "sub", 0 ) /* 64k for the second CPU */ + ROM_LOAD( "exerion.05", 0x0000, 0x2000, CRC(32f6bff5) SHA1(a4d0289f9d1d9eea7ca9a32a0616af48da74b401) ) + + ROM_REGION( 0x02000, "gfx1", 0 ) + ROM_LOAD( "exerion.06", 0x00000, 0x2000, CRC(435a85a4) SHA1(f6846bfee11df754405d4d796e7d8ac0321b6eb6) ) /* fg chars */ + + ROM_REGION( 0x04000, "gfx2", 0 ) + ROM_LOAD( "exerion.11", 0x00000, 0x2000, CRC(f0633a09) SHA1(8989bcb12abadde34777f7c189cfa6e2dfe92d62) ) /* sprites */ + ROM_LOAD( "exerion.10", 0x02000, 0x2000, CRC(80312de0) SHA1(4fa3bb9d5c62e41a54e8909f8d3b47637137e913) ) + + ROM_REGION( 0x08000, "gfx3", 0 ) + 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, "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, "maincpu", 0 ) + ROM_LOAD( "prom5.4p", 0x0000, 0x4000, CRC(58b4dc1b) SHA1(3e34d1eda0b0537dac1062e96259d4cc7c64049c) ) + ROM_LOAD( "prom6.4s", 0x4000, 0x2000, CRC(fca18c2d) SHA1(31077dada3ed4aa2e26af933f589e01e0c71e5cd) ) + + ROM_REGION( 0x2000, "sub", 0 ) /* 64k for the second CPU */ + ROM_LOAD( "exerion.05", 0x0000, 0x2000, CRC(32f6bff5) SHA1(a4d0289f9d1d9eea7ca9a32a0616af48da74b401) ) + + ROM_REGION( 0x02000, "gfx1", 0 ) + ROM_LOAD( "exerion.06", 0x00000, 0x2000, CRC(435a85a4) SHA1(f6846bfee11df754405d4d796e7d8ac0321b6eb6) ) /* fg chars */ + + ROM_REGION( 0x04000, "gfx2", 0 ) + ROM_LOAD( "exerion.11", 0x00000, 0x2000, CRC(f0633a09) SHA1(8989bcb12abadde34777f7c189cfa6e2dfe92d62) ) /* sprites */ + ROM_LOAD( "exerion.10", 0x02000, 0x2000, CRC(80312de0) SHA1(4fa3bb9d5c62e41a54e8909f8d3b47637137e913) ) + + ROM_REGION( 0x08000, "gfx3", 0 ) + 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, "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, "maincpu", 0 ) + ROM_LOAD( "eb5.bin", 0x0000, 0x4000, CRC(da175855) SHA1(11ea46fd1d504e16e5ffc604d74c1ce210d6be1c) ) + ROM_LOAD( "eb6.bin", 0x4000, 0x2000, CRC(0dbe2eff) SHA1(5b0e5e8453619beec46c4350d1b2ed571fe3dc24) ) + + ROM_REGION( 0x2000, "sub", 0 ) /* 64k for the second CPU */ + ROM_LOAD( "exerion.05", 0x0000, 0x2000, CRC(32f6bff5) SHA1(a4d0289f9d1d9eea7ca9a32a0616af48da74b401) ) + + ROM_REGION( 0x02000, "gfx1", 0 ) + ROM_LOAD( "exerion.06", 0x00000, 0x2000, CRC(435a85a4) SHA1(f6846bfee11df754405d4d796e7d8ac0321b6eb6) ) /* fg chars */ + + ROM_REGION( 0x04000, "gfx2", 0 ) + ROM_LOAD( "exerion.11", 0x00000, 0x2000, CRC(f0633a09) SHA1(8989bcb12abadde34777f7c189cfa6e2dfe92d62) ) /* sprites */ + ROM_LOAD( "exerion.10", 0x02000, 0x2000, CRC(80312de0) SHA1(4fa3bb9d5c62e41a54e8909f8d3b47637137e913) ) + + ROM_REGION( 0x08000, "gfx3", 0 ) + 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, "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 + * + *************************************/ + +DRIVER_INIT_MEMBER(exerion_state,exerion) +{ + UINT32 oldaddr, newaddr, length; + UINT8 *src, *dst; + + /* allocate some temporary space */ + dynamic_buffer temp(0x10000); + + /* make a temporary copy of the character data */ + src = &temp[0]; + dst = memregion("gfx1")->base(); + length = memregion("gfx1")->bytes(); + 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[0]; + dst = memregion("gfx2")->base(); + length = memregion("gfx2")->bytes(); + 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]; + } +} + + +DRIVER_INIT_MEMBER(exerion_state,exerionb) +{ + UINT8 *ram = memregion("maincpu")->base(); + 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_CALL(exerion); +} + + + +/************************************* + * + * Game drivers + * + *************************************/ + +GAME( 1983, exerion, 0, exerion, exerion, exerion_state, exerion, ROT90, "Jaleco", "Exerion", MACHINE_SUPPORTS_SAVE ) +GAME( 1983, exeriont, exerion, exerion, exerion, exerion_state, exerion, ROT90, "Jaleco (Taito America license)", "Exerion (Taito)", MACHINE_SUPPORTS_SAVE ) +GAME( 1983, exerionb, exerion, exerion, exerion, exerion_state, exerionb, ROT90, "bootleg", "Exerion (bootleg)", MACHINE_SUPPORTS_SAVE ) |