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m79amb.c
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C/C++ Source or Header
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2000-04-04
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6KB
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202 lines
/* Ramtek M79 Ambush */
#include "driver.h"
#include "vidhrdw/generic.h"
/*
* in
* 8000 DIP SW
* 8002 D0=VBlank
* 8004
* 8005
*
* out
* 8000
* 8001 Mask Sel
* 8002
* 8003 D0=SelfTest LED
*
*/
WRITE_HANDLER( ramtek_videoram_w );
int invaders_interrupt(void);
void ramtek_sh_update(void);
WRITE_HANDLER( ramtek_mask_w );
/*
* since these functions aren't used anywhere else, i've made them
* static, and included them here
*/
static const int ControllerTable[32] = {
0 , 1 , 3 , 2 , 6 , 7 , 5 , 4 ,
12 , 13 , 15 , 14 , 10 , 11 , 9 , 8 ,
24 , 25 , 27 , 26 , 30 , 31 , 29 , 28 ,
20 , 21 , 23 , 22 , 18 , 19 , 17 , 16
};
static READ_HANDLER( gray5bit_controller0_r )
{
return (input_port_2_r(0) & 0xe0) | (~ControllerTable[input_port_2_r(0) & 0x1f] & 0x1f);
}
static READ_HANDLER( gray5bit_controller1_r )
{
return (input_port_3_r(0) & 0xe0) | (~ControllerTable[input_port_3_r(0) & 0x1f] & 0x1f);
}
static struct MemoryReadAddress readmem[] =
{
{ 0x0000, 0x1fff, MRA_ROM },
{ 0x4000, 0x63ff, MRA_RAM },
{ 0x8000, 0x8000, input_port_0_r},
{ 0x8002, 0x8002, input_port_1_r},
{ 0x8004, 0x8004, gray5bit_controller0_r},
{ 0x8005, 0x8005, gray5bit_controller1_r},
{ 0xC000, 0xC07f, MRA_RAM}, /* ?? */
{ 0xC200, 0xC27f, MRA_RAM}, /* ?? */
{ -1 } /* end of table */
};
WRITE_HANDLER( sound_w )
{
}
static struct MemoryWriteAddress writemem[] =
{
{ 0x0000, 0x1fff, MWA_ROM },
{ 0x4000, 0x43ff, MWA_RAM },
{ 0x4400, 0x5fff, ramtek_videoram_w, &videoram },
{ 0x6000, 0x63ff, MWA_RAM }, /* ?? */
{ 0x8001, 0x8001, ramtek_mask_w},
{ 0x8000, 0x8000, sound_w },
{ 0x8002, 0x8003, sound_w },
{ 0xC000, 0xC07f, MWA_RAM}, /* ?? */
{ 0xC200, 0xC27f, MWA_RAM}, /* ?? */
{ -1 } /* end of table */
};
INPUT_PORTS_START( m79amb )
PORT_START /* 8000 */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNKNOWN ) /* dip switch */
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_UNUSED )
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_UNUSED )
PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_UNUSED )
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_UNUSED )
PORT_START /* 8002 */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_VBLANK )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START1 )
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_COIN1 )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_TILT )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START /* 8004 */
PORT_ANALOG( 0x1f, 0x10, IPT_PADDLE, 25, 10, 0, 0x1f)
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_START /* 8005 */
PORT_ANALOG( 0x1f, 0x10, IPT_PADDLE | IPF_PLAYER2, 25, 10, 0, 0x1f)
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )
INPUT_PORTS_END
static unsigned char palette[] = /* V.V */ /* Smoothed pure colors, overlays are not so contrasted */
{
0x00,0x00,0x00, /* BLACK */
0xff,0xff,0xff, /* WHITE */
0xff,0x20,0x20, /* RED */
0x20,0xff,0x20, /* GREEN */
0xff,0xff,0x20, /* YELLOW */
0x20,0xff,0xff, /* CYAN */
0xff,0x20,0xff /* PURPLE */
};
static void init_palette(unsigned char *game_palette, unsigned short *game_colortable,const unsigned char *color_prom)
{
memcpy(game_palette,palette,sizeof(palette));
}
static int M79_interrupt(void)
{
return 0x00cf; /* RST 08h */
}
static void init_m79amb(void)
{
unsigned char *rom = memory_region(REGION_CPU1);
int i;
/* PROM data is active low */
for (i = 0;i < 0x2000;i++)
rom[i] = ~rom[i];
}
static struct MachineDriver machine_driver_m79amb =
{
/* basic machine hardware */
{
{
CPU_8080,
1996800,
readmem,writemem,0,0,
M79_interrupt, 1
}
},
60, DEFAULT_REAL_60HZ_VBLANK_DURATION, /* frames per second, vblank duration */
1, /* single CPU, no need for interleaving */
0,
/* video hardware */
32*8, 28*8, { 0*8, 32*8-1, 0*8, 28*8-1 },
0, /* no gfxdecodeinfo - bitmapped display */
sizeof(palette) / sizeof(palette[0]) / 3, 0,
init_palette,
VIDEO_TYPE_RASTER|VIDEO_SUPPORTS_DIRTY,
0,
generic_bitmapped_vh_start,
generic_bitmapped_vh_stop,
generic_bitmapped_vh_screenrefresh,
/* sound hardware */
0,0,0,0
};
ROM_START( m79amb )
ROM_REGION( 0x10000, REGION_CPU1 ) /* 64k for code */
ROM_LOAD( "m79.10t", 0x0000, 0x0200, 0xccf30b1e )
ROM_LOAD( "m79.9t", 0x0200, 0x0200, 0xdaf807dd )
ROM_LOAD( "m79.8t", 0x0400, 0x0200, 0x79fafa02 )
ROM_LOAD( "m79.7t", 0x0600, 0x0200, 0x06f511f8 )
ROM_LOAD( "m79.6t", 0x0800, 0x0200, 0x24634390 )
ROM_LOAD( "m79.5t", 0x0a00, 0x0200, 0x95252aa6 )
ROM_LOAD( "m79.4t", 0x0c00, 0x0200, 0x54cffb0f )
ROM_LOAD( "m79.3ta", 0x0e00, 0x0200, 0x27db5ede )
ROM_LOAD( "m79.10u", 0x1000, 0x0200, 0xe41d13d2 )
ROM_LOAD( "m79.9u", 0x1200, 0x0200, 0xe35f5616 )
ROM_LOAD( "m79.8u", 0x1400, 0x0200, 0x14eafd7c )
ROM_LOAD( "m79.7u", 0x1600, 0x0200, 0xb9864f25 )
ROM_LOAD( "m79.6u", 0x1800, 0x0200, 0xdd25197f )
ROM_LOAD( "m79.5u", 0x1a00, 0x0200, 0x251545e2 )
ROM_LOAD( "m79.4u", 0x1c00, 0x0200, 0xb5f55c75 )
ROM_LOAD( "m79.3u", 0x1e00, 0x0200, 0xe968691a )
ROM_END
GAME( 1977, m79amb, 0, m79amb, m79amb, m79amb, ROT0, "Ramtek", "M79 Ambush" )