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author Robert <Robbbert@users.noreply.github.com>2014-11-20 00:46:42 +1100
committer Robert <Robbbert@users.noreply.github.com>2014-11-20 00:46:42 +1100
commit8082e720004cd59ebcc545a22fa0692fe0b77eb7 (patch)
tree2170ae1ab5423bd2fb0c454a0728826cb8e9c9bc
parentbad44fc227f060523f9d17f33b95feedaf825c91 (diff)
-rw-r--r--src/mame/drivers/alinvade.c178
1 files changed, 109 insertions, 69 deletions
diff --git a/src/mame/drivers/alinvade.c b/src/mame/drivers/alinvade.c
index f1581ade5df..6e53ba1b0bc 100644
--- a/src/mame/drivers/alinvade.c
+++ b/src/mame/drivers/alinvade.c
@@ -5,39 +5,77 @@
Driver by David Haywood and Mariusz Wojcieszek
TODO:
- - 16 bytes are protected in the c*** range. I'm guessing they used a PROM to protect a
+ - 16 bytes are protected in the c*** range. I'm guessing they used a PROM to protect a
simple sub-routine because just after that the program has a left-over located at 0xe000-0xe00f (yup, NOPs + a RTS)
It's unknown at current stage what it really protects tho ...
+ Sound is entirely guesswork.
+
*/
#include "emu.h"
#include "cpu/m6502/m6502.h"
+#include "sound/discrete.h"
#include "alinvade.lh"
class alinvade_state : public driver_device
{
public:
alinvade_state(const machine_config &mconfig, device_type type, const char *tag)
- : driver_device(mconfig, type, tag),
- m_maincpu(*this, "maincpu"),
- m_videoram(*this, "videoram")
+ : driver_device(mconfig, type, tag)
+ , m_maincpu(*this, "maincpu")
+ , m_videoram(*this, "videoram")
+ , m_discrete(*this, "discrete")
{ }
- UINT8 irqmask;
- UINT8 irqff;
DECLARE_READ8_MEMBER(irqmask_r);
DECLARE_WRITE8_MEMBER(irqmask_w);
+ DECLARE_WRITE8_MEMBER(sound_w);
+ DECLARE_WRITE8_MEMBER(sounden_w);
INTERRUPT_GEN_MEMBER(vblank_irq);
- required_device<cpu_device> m_maincpu;
- required_shared_ptr<UINT8> m_videoram;
+ UINT32 screen_update_alinvade(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
-public:
+private:
+ UINT8 irqmask;
+ UINT8 irqff;
virtual void machine_start();
virtual void machine_reset();
- UINT32 screen_update_alinvade(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
+ required_device<cpu_device> m_maincpu;
+ required_shared_ptr<UINT8> m_videoram;
+ required_device<discrete_device> m_discrete;
};
+static const discrete_dac_r1_ladder alinvade_music_dac =
+ {3, {0, RES_K(47), RES_K(12)}, 0, 0, 0, CAP_U(0.01)};
+
+#define ALINVADE_MUSIC_CLK (75000)
+
+DISCRETE_SOUND_START(alinvade)
+ DISCRETE_INPUT_DATA (NODE_01)
+
+ DISCRETE_NOTE(NODE_20, 1, ALINVADE_MUSIC_CLK, NODE_01, 255, 5, DISC_CLK_IS_FREQ)
+
+ // Convert count to 7492 output
+ DISCRETE_TRANSFORM2(NODE_21, NODE_20, 2, "01>0+")
+
+ DISCRETE_DAC_R1(NODE_22, NODE_21, DEFAULT_TTL_V_LOGIC_1, &alinvade_music_dac)
+
+ DISCRETE_CRFILTER(NODE_80, NODE_22, RES_K(10), CAP_U(0.1))
+
+ DISCRETE_OUTPUT(NODE_80, 2500)
+
+DISCRETE_SOUND_END
+
+WRITE8_MEMBER( alinvade_state::sound_w )
+{
+ m_discrete->write(space, NODE_01, (data^0x3f)<<2);
+}
+
+WRITE8_MEMBER( alinvade_state::sounden_w )
+{
+ machine().sound().system_enable(data == 4);
+}
+
READ8_MEMBER(alinvade_state::irqmask_r)
{
return 0; // TODO: might be anything
@@ -53,61 +91,61 @@ WRITE8_MEMBER(alinvade_state::irqmask_w)
}
static ADDRESS_MAP_START( alinvade_map, AS_PROGRAM, 8, alinvade_state )
- AM_RANGE(0x0000, 0x01ff) AM_RAM
- AM_RANGE(0x0400, 0x0bff) AM_RAM AM_SHARE("videoram")
+ AM_RANGE(0x0000, 0x01ff) AM_RAM
+ AM_RANGE(0x0400, 0x0bff) AM_RAM AM_SHARE("videoram")
AM_RANGE(0x0c00, 0x0dff) AM_RAM
- AM_RANGE(0x2000, 0x2000) AM_WRITENOP //??
- AM_RANGE(0x4000, 0x4000) AM_READ_PORT("COIN")
- AM_RANGE(0x6000, 0x6000) AM_READ_PORT("DSW")
- AM_RANGE(0x8000, 0x8000) AM_READ_PORT("IN0")
- AM_RANGE(0x8001, 0x8001) AM_READ_PORT("IN1")
- AM_RANGE(0x8002, 0x8002) AM_READ_PORT("IN2")
- AM_RANGE(0x8003, 0x8003) AM_READ_PORT("IN3")
- AM_RANGE(0x8004, 0x8004) AM_READ_PORT("IN4")
- AM_RANGE(0xa000, 0xa000) AM_WRITENOP //??
- AM_RANGE(0xc000, 0xc00f) AM_MIRROR(0xff0) AM_ROM AM_REGION("proms",0)
- AM_RANGE(0xe000, 0xe3ff) AM_ROM
- AM_RANGE(0xe400, 0xe400) AM_WRITENOP //??
- AM_RANGE(0xe800, 0xe800) AM_READWRITE(irqmask_r,irqmask_w) //??
- AM_RANGE(0xec00, 0xffff) AM_ROM
+ AM_RANGE(0x2000, 0x2000) AM_WRITE(sound_w)
+ AM_RANGE(0x4000, 0x4000) AM_READ_PORT("COIN")
+ AM_RANGE(0x6000, 0x6000) AM_READ_PORT("DSW")
+ AM_RANGE(0x8000, 0x8000) AM_READ_PORT("IN0")
+ AM_RANGE(0x8001, 0x8001) AM_READ_PORT("IN1")
+ AM_RANGE(0x8002, 0x8002) AM_READ_PORT("IN2")
+ AM_RANGE(0x8003, 0x8003) AM_READ_PORT("IN3")
+ AM_RANGE(0x8004, 0x8004) AM_READ_PORT("IN4")
+ AM_RANGE(0xa000, 0xa000) AM_WRITENOP //??
+ AM_RANGE(0xc000, 0xc00f) AM_MIRROR(0xff0) AM_ROM AM_REGION("proms",0)
+ AM_RANGE(0xe000, 0xe3ff) AM_ROM
+ AM_RANGE(0xe400, 0xe400) AM_WRITE(sounden_w)
+ AM_RANGE(0xe800, 0xe800) AM_READWRITE(irqmask_r,irqmask_w) //??
+ AM_RANGE(0xec00, 0xffff) AM_ROM
ADDRESS_MAP_END
static INPUT_PORTS_START( alinvade )
- PORT_START("COIN")
- PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_COIN1 )
- PORT_BIT(0xef, IP_ACTIVE_LOW, IPT_UNKNOWN )
-
- PORT_START("IN0")
- PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_PLAYER(1)
- PORT_BIT(0xdf, IP_ACTIVE_HIGH, IPT_UNKNOWN )
-
- PORT_START("IN1")
- PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_2WAY PORT_PLAYER(1)
- PORT_BIT(0xdf, IP_ACTIVE_HIGH, IPT_UNKNOWN )
-
- PORT_START("IN2")
- PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_2WAY PORT_PLAYER(1)
- PORT_BIT(0xdf, IP_ACTIVE_HIGH, IPT_UNKNOWN )
-
- PORT_START("IN3")
- PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_START1 )
- PORT_BIT(0xdf, IP_ACTIVE_HIGH, IPT_UNKNOWN )
-
- PORT_START("IN4")
- PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_START2 )
- PORT_BIT(0xdf, IP_ACTIVE_HIGH, IPT_UNKNOWN )
-
- PORT_START("DSW")
- PORT_DIPNAME( 0x03, 0x00, DEF_STR( Lives ) )
- PORT_DIPSETTING( 0x00, "2" )
- PORT_DIPSETTING( 0x01, "3" )
- PORT_DIPSETTING( 0x02, "4" )
- PORT_DIPSETTING( 0x03, "5" )
- PORT_DIPNAME( 0x04, 0x00, DEF_STR ( Unknown ) ) // read, but not tested afterwards?
- PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
- PORT_DIPSETTING( 0x04, DEF_STR( On ) )
- PORT_BIT( 0xf8, IP_ACTIVE_HIGH, IPT_UNUSED )
+ PORT_START("COIN")
+ PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_COIN1 )
+ PORT_BIT(0xef, IP_ACTIVE_LOW, IPT_UNKNOWN )
+
+ PORT_START("IN0")
+ PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_PLAYER(1)
+ PORT_BIT(0xdf, IP_ACTIVE_HIGH, IPT_UNKNOWN )
+
+ PORT_START("IN1")
+ PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_2WAY PORT_PLAYER(1)
+ PORT_BIT(0xdf, IP_ACTIVE_HIGH, IPT_UNKNOWN )
+
+ PORT_START("IN2")
+ PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_2WAY PORT_PLAYER(1)
+ PORT_BIT(0xdf, IP_ACTIVE_HIGH, IPT_UNKNOWN )
+
+ PORT_START("IN3")
+ PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_START1 )
+ PORT_BIT(0xdf, IP_ACTIVE_HIGH, IPT_UNKNOWN )
+
+ PORT_START("IN4")
+ PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_START2 )
+ PORT_BIT(0xdf, IP_ACTIVE_HIGH, IPT_UNKNOWN )
+
+ PORT_START("DSW")
+ PORT_DIPNAME( 0x03, 0x00, DEF_STR( Lives ) )
+ PORT_DIPSETTING( 0x00, "2" )
+ PORT_DIPSETTING( 0x01, "3" )
+ PORT_DIPSETTING( 0x02, "4" )
+ PORT_DIPSETTING( 0x03, "5" )
+ PORT_DIPNAME( 0x04, 0x00, DEF_STR ( Unknown ) ) // read, but not tested afterwards?
+ PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x04, DEF_STR( On ) )
+ PORT_BIT( 0xf8, IP_ACTIVE_HIGH, IPT_UNUSED )
INPUT_PORTS_END
@@ -169,24 +207,26 @@ static MACHINE_CONFIG_START( alinvade, alinvade_state )
/* sound hardware */
MCFG_SPEAKER_STANDARD_MONO("mono")
+ MCFG_DISCRETE_ADD("discrete", 0, alinvade)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_CONFIG_END
ROM_START( alinvade )
ROM_REGION( 0x10000, "maincpu", 0 ) // todo, check mapping
- ROM_LOAD( "alien28.708", 0xe000, 0x0400, CRC(de376295) SHA1(e8eddbb1be1f8661c6b5b39c0d78a65bded65db2) )
- ROM_LOAD( "alien29.708", 0xec00, 0x0400, CRC(20212977) SHA1(9d24a6b403d968267079fa6241545bd5a01afebb) )
- ROM_LOAD( "alien30.708", 0xf000, 0x0400, CRC(734b691c) SHA1(9e562159061eecf4b1dee4ea0ee4752c901a54aa) )
- ROM_LOAD( "alien31.708", 0xf400, 0x0400, CRC(5a70535c) SHA1(2827e7d4bffca78bd035da04481e1e972ee2da39) )
- ROM_LOAD( "alien32.708", 0xf800, 0x0400, CRC(332dd234) SHA1(9974668344a2a351868a9e7757d1c3a497dc5621) )
- ROM_LOAD( "alien33.708", 0xfc00, 0x0400, CRC(e0d57fc7) SHA1(7b8ddcb4a86811592d2d0bbc61b2f19e5caa9ccc) )
+ ROM_LOAD( "alien28.708", 0xe000, 0x0400, CRC(de376295) SHA1(e8eddbb1be1f8661c6b5b39c0d78a65bded65db2) )
+ ROM_LOAD( "alien29.708", 0xec00, 0x0400, CRC(20212977) SHA1(9d24a6b403d968267079fa6241545bd5a01afebb) )
+ ROM_LOAD( "alien30.708", 0xf000, 0x0400, CRC(734b691c) SHA1(9e562159061eecf4b1dee4ea0ee4752c901a54aa) )
+ ROM_LOAD( "alien31.708", 0xf400, 0x0400, CRC(5a70535c) SHA1(2827e7d4bffca78bd035da04481e1e972ee2da39) )
+ ROM_LOAD( "alien32.708", 0xf800, 0x0400, CRC(332dd234) SHA1(9974668344a2a351868a9e7757d1c3a497dc5621) )
+ ROM_LOAD( "alien33.708", 0xfc00, 0x0400, CRC(e0d57fc7) SHA1(7b8ddcb4a86811592d2d0bbc61b2f19e5caa9ccc) )
ROM_REGION( 0x20, "proms", 0 )
ROM_LOAD( "prom", 0, 0x20, NO_DUMP )
- ROM_FILL( 0x00, 0x0f, 0xea )
- ROM_FILL( 0x0f, 0x01, 0x60 ) // rts for whole area, interrupt code jumps to various addresses here, check note on top.
+ ROM_FILL( 0x00, 0x0f, 0xea )
+ ROM_FILL( 0x0f, 0x01, 0x60 ) // rts for whole area, interrupt code jumps to various addresses here, check note on top.
ROM_END
-GAMEL( 198?, alinvade, 0, alinvade, alinvade, driver_device, 0, ROT90, "Forbes?", "Alien Invaders", GAME_UNEMULATED_PROTECTION | GAME_NO_SOUND, layout_alinvade )
+GAMEL( 198?, alinvade, 0, alinvade, alinvade, driver_device, 0, ROT90, "Forbes?", "Alien Invaders", GAME_UNEMULATED_PROTECTION | GAME_IMPERFECT_SOUND, layout_alinvade )