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Emulate sound latch protection in brickzn [Luca Elia, system11]

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This commit is contained in:
Luca Elia 2015-03-01 22:18:19 +01:00
parent da57561e0f
commit df564067dd
2 changed files with 38 additions and 9 deletions
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43
src/mame/drivers/suna8.c
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@ -678,7 +678,7 @@ READ8_MEMBER(suna8_state::brickzn_cheats_r)
---- ---0 Palette RAM Bank
C0A0: Sound Latch
C0A0: Sound Latch (optionally scrambled)
C0A0: 7654 3---
@ -699,9 +699,20 @@ WRITE8_MEMBER(suna8_state::brickzn_multi_w)
}
else if ((m_protection_val & 0xfc) == 0x90)
{
soundlatch_byte_w(space, 0, data);
/*
0d brick hit NO! 25?
2c side wall hit OK
3b paddle hit OK
44 death OK?
53 death OK?
56 coin in OK?
70 monster hit NO? 58?
*/
UINT8 remap = (m_remap_sound ? BITSWAP8(data, 7,6,3,4,5,2,1,0) : data);
logerror("CPU #0 - PC %04X: soundlatch = %02X\n",space.device().safe_pc(),data);
soundlatch_byte_w(space, 0, remap);
logerror("CPU #0 - PC %04X: soundlatch = %02X (->%02X)\n",space.device().safe_pc(),data,remap);
}
else if (protselect == 0x04)
{
@ -774,6 +785,8 @@ WRITE8_MEMBER(suna8_state::brickzn_prot2_w)
else
space.install_ram(0xc800, 0xdfff, m_wram);
m_remap_sound = ((m_prot2 ^ data) == 0xf8) ? 1 : 0;
// Select alternate data decryption, see code at 787e:
membank("bank1")->set_entry((membank("bank1")->entry() & 0x0f) + ((m_prot2 == (data | 0xdc)) ? 0x10 : 0));
@ -1527,6 +1540,19 @@ static INPUT_PORTS_START( brickzn )
INPUT_PORTS_END
static INPUT_PORTS_START( brickznv6 )
PORT_INCLUDE(brickzn)
PORT_MODIFY("DSW2") // DSW 2 - $c103
PORT_DIPNAME( 0x18, 0x10, DEF_STR( Bonus_Life ) ) PORT_DIPLOCATION("SW2:4,5")
PORT_DIPSETTING( 0x18, "None" )
PORT_DIPSETTING( 0x10, "10K" )
PORT_DIPSETTING( 0x08, "30K" )
PORT_DIPSETTING( 0x00, "50K" )
PORT_DIPNAME( 0x20, 0x20, "Display" ) PORT_DIPLOCATION("SW2:6")
PORT_DIPSETTING( 0x00, DEF_STR( No ) )
PORT_DIPSETTING( 0x20, DEF_STR( Yes ) )
INPUT_PORTS_END
/***************************************************************************
Hard Head 2
@ -1917,6 +1943,7 @@ MACHINE_CONFIG_END
MACHINE_RESET_MEMBER(suna8_state,brickzn)
{
m_protection_val = m_prot2 = m_prot2_prev = 0xff;
m_remap_sound = 0;
membank("bank1")->set_entry(0);
}
@ -1928,7 +1955,7 @@ static MACHINE_CONFIG_START( brickzn, suna8_state )
MCFG_CPU_IO_MAP(brickzn_io_map)
MCFG_CPU_VBLANK_INT_DRIVER("screen", suna8_state, irq0_line_hold) // nmi breaks ramtest but is needed!
MCFG_CPU_ADD("audiocpu", Z80, SUNA8_MASTER_CLOCK / 4) /* Z0840006PSC */
MCFG_CPU_ADD("audiocpu", Z80, SUNA8_MASTER_CLOCK / 8) /* Z0840006PSC - 3MHz better matches the tempo in the video */
MCFG_CPU_PROGRAM_MAP(brickzn_sound_map)
MCFG_CPU_ADD("pcm", Z80, SUNA8_MASTER_CLOCK / 4) /* Z0840006PSC */
@ -2882,7 +2909,7 @@ GAME( 1990, starfigh, 0, starfigh, starfigh, suna8_state, starfigh, ROT
GAME( 1991, hardhea2, 0, hardhea2, hardhea2, suna8_state, hardhea2, ROT0, "SunA", "Hard Head 2 (v2.0)", 0 )
// is meant to sound like this https://www.youtube.com/watch?v=yfU1C7A3iZI (recorded from v6.0, Joystick version)
GAME( 1992, brickzn, 0, brickzn, brickzn, suna8_state, brickzn, ROT90, "SunA", "Brick Zone (v6.0, Joystick)", GAME_IMPERFECT_SOUND )
GAME( 1992, brickznv5, brickzn, brickzn, brickzn, suna8_state, brickznv5, ROT90, "SunA", "Brick Zone (v5.0, Joystick)", GAME_IMPERFECT_SOUND )
GAME( 1992, brickznv4, brickzn, brickzn, brickzn, suna8_state, brickznv4, ROT90, "SunA", "Brick Zone (v4.0, Spinner)", GAME_IMPERFECT_SOUND )
GAME( 1992, brickzn11, brickzn, brickzn, brickzn, suna8_state, brickzn11, ROT90, "SunA", "Brick Zone (v1.1)", GAME_NOT_WORKING )
GAME( 1992, brickzn, 0, brickzn, brickznv6,suna8_state, brickzn, ROT90, "SunA", "Brick Zone (v6.0, Joystick)", 0 )
GAME( 1992, brickznv5, brickzn, brickzn, brickzn, suna8_state, brickznv5, ROT90, "SunA", "Brick Zone (v5.0, Joystick)", 0 )
GAME( 1992, brickznv4, brickzn, brickzn, brickzn, suna8_state, brickznv4, ROT90, "SunA", "Brick Zone (v4.0, Spinner)", 0 )
GAME( 1992, brickzn11, brickzn, brickzn, brickzn, suna8_state, brickzn11, ROT90, "SunA", "Brick Zone (v1.1)", GAME_NOT_WORKING )

4
src/mame/includes/suna8.h
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@ -18,7 +18,8 @@ public:
m_screen(*this, "screen"),
m_palette(*this, "palette"),
m_prot_opcode_toggle(0)
m_prot_opcode_toggle(0),
m_remap_sound(0)
{ }
required_device<cpu_device> m_maincpu;
@ -45,6 +46,7 @@ public:
UINT8 m_spritebank_latch;
UINT8 m_write_disable;
UINT8 m_prot_opcode_toggle;
UINT8 m_remap_sound;
UINT8* m_decrypt;
enum GFXBANK_TYPE_T