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hexa.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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221 lines
/****************************************************************************
HEXA
driver by Howie Cohen
Memory map (prelim)
0000 7fff ROM
8000 bfff bank switch rom space??
c000 c7ff RAM
e000 e7ff video ram
e800-efff unused RAM
read:
d001 AY8910 read
f000 ???????
write:
d000 AY8910 control
d001 AY8910 write
d008 bit0/1 = flip screen x/y
bit 4 = ROM bank??
bit 5 = char bank
other bits????????
d010 watchdog reset, or IRQ acknowledge, or both
f000 ????????
NOTES:
Needs High score save and load (i think the high score is stored
around 0xc709)
*************************************************************************/
#include "driver.h"
#include "vidhrdw/generic.h"
void hexa_vh_convert_color_prom(unsigned char *palette, unsigned short *colortable,const unsigned char *color_prom);
void hexa_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh);
WRITE_HANDLER( hexa_d008_w );
static struct MemoryReadAddress readmem[] =
{
{ 0x0000, 0x7fff, MRA_ROM },
{ 0x8000, 0xbfff, MRA_BANK1 },
{ 0xc000, 0xc7ff, MRA_RAM },
{ 0xd001, 0xd001, AY8910_read_port_0_r },
{ 0xe000, 0xe7ff, MRA_RAM },
{ -1 } /* end of table */
};
static struct MemoryWriteAddress writemem[] =
{
{ 0x0000, 0xbfff, MWA_ROM },
{ 0xc000, 0xc7ff, MWA_RAM },
{ 0xd000, 0xd000, AY8910_control_port_0_w },
{ 0xd001, 0xd001, AY8910_write_port_0_w },
{ 0xd008, 0xd008, hexa_d008_w },
{ 0xd010, 0xd010, watchdog_reset_w }, /* or IRQ acknowledge, or both */
{ 0xe000, 0xe7ff, videoram_w, &videoram, &videoram_size },
{ -1 } /* end of table */
};
INPUT_PORTS_START( hexa )
PORT_START /* IN0 */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | IPF_4WAY )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_4WAY )
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_4WAY )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_4WAY )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN1 )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON2 )
PORT_START /* DSW */
PORT_DIPNAME( 0x03, 0x03, DEF_STR( Coinage ) )
PORT_DIPSETTING( 0x00, DEF_STR( 3C_1C ) )
PORT_DIPSETTING( 0x01, DEF_STR( 2C_1C ) )
PORT_DIPSETTING( 0x03, DEF_STR( 1C_1C ) )
PORT_DIPSETTING( 0x02, DEF_STR( 1C_2C ) )
PORT_DIPNAME( 0x04, 0x00, "Naughty Pics" )
PORT_DIPSETTING( 0x04, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x08, 0x08, DEF_STR( Flip_Screen ) )
PORT_DIPSETTING( 0x08, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x30, 0x30, "Difficulty?" )
PORT_DIPSETTING( 0x30, "Easy?" )
PORT_DIPSETTING( 0x20, "Medium?" )
PORT_DIPSETTING( 0x10, "Hard?" )
PORT_DIPSETTING( 0x00, "Hardest?" )
PORT_DIPNAME( 0x40, 0x40, "Pobys" )
PORT_DIPSETTING( 0x40, "2" )
PORT_DIPSETTING( 0x00, "4" )
PORT_DIPNAME( 0x80, 0x80, DEF_STR( Demo_Sounds ) )
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x80, DEF_STR( On ) )
INPUT_PORTS_END
static struct GfxLayout charlayout =
{
8,8, /* 8 by 8 */
4096, /* 4096 characters */
3, /* 3 bits per pixel */
{ 2*4096*8*8, 4096*8*8, 0 }, /* plane */
{ 0, 1, 2, 3, 4, 5, 6, 7 }, /* x bit */
{ 8*0, 8*1, 8*2, 8*3, 8*4, 8*5, 8*6, 8*7 }, /* y bit */
8*8
};
static struct GfxDecodeInfo gfxdecodeinfo[] =
{
{ REGION_GFX1, 0x0000, &charlayout, 0 , 32 },
{ -1 } /* end of array */
};
static struct AY8910interface ay8910_interface =
{
1, /* 1 chip */
1500000, /* 1.5 MHz ???? */
{ 50 },
{ input_port_0_r },
{ input_port_1_r },
{ 0 },
{ 0 }
};
static struct MachineDriver machine_driver_hexa =
{
/* basic machine hardware */
{
{
CPU_Z80,
4000000, /* 4 MHz ??????? */
readmem,writemem,0,0,
interrupt,1
}
},
60, DEFAULT_60HZ_VBLANK_DURATION, /* frames per second, vblank duration */
1, /* single CPU, no need for interleaving */
0,
/* video hardware */
32*8, 32*8, { 0*8, 32*8-1, 2*8, 30*8-1 },
gfxdecodeinfo,
256, 256,
hexa_vh_convert_color_prom,
VIDEO_TYPE_RASTER | VIDEO_SUPPORTS_DIRTY,
0, /* vh_init routine */
generic_vh_start, /* vh_start routine */
generic_vh_stop, /* vh_stop routine */
hexa_vh_screenrefresh, /* vh_update routine */
/* sound hardware */
0,0,0,0,
{
{
SOUND_AY8910,
&ay8910_interface
}
}
};
/***************************************************************************
Game driver(s)
***************************************************************************/
ROM_START( hexa )
ROM_REGION( 0x18000, REGION_CPU1 ) /* 64k for code + 32k for banked ROM */
ROM_LOAD( "hexa.20", 0x00000, 0x8000, 0x98b00586 )
ROM_LOAD( "hexa.21", 0x10000, 0x8000, 0x3d5d006c )
ROM_REGION( 0x18000, REGION_GFX1 | REGIONFLAG_DISPOSE )
ROM_LOAD( "hexa.17", 0x00000, 0x8000, 0xf6911dd6 )
ROM_LOAD( "hexa.18", 0x08000, 0x8000, 0x6e3d95d2 )
ROM_LOAD( "hexa.19", 0x10000, 0x8000, 0xffe97a31 )
ROM_REGION( 0x0300, REGION_PROMS )
ROM_LOAD( "hexa.001", 0x0000, 0x0100, 0x88a055b4 )
ROM_LOAD( "hexa.003", 0x0100, 0x0100, 0x3e9d4932 )
ROM_LOAD( "hexa.002", 0x0200, 0x0100, 0xff15366c )
ROM_END
static void init_hexa(void)
{
unsigned char *RAM = memory_region(REGION_CPU1);
/* Hexa is not protected or anything, but it keeps writing 0x3f to register */
/* 0x07 of the AY8910, to read the input ports. This causes clicks in the */
/* music since the output channels are continuously disabled and reenabled. */
/* To avoid that, we just NOP out the 0x3f write. */
RAM[0x0124] = 0x00;
RAM[0x0125] = 0x00;
RAM[0x0126] = 0x00;
}
GAME( ????, hexa, 0, hexa, hexa, hexa, ROT0, "D. R. Korea", "Hexa" )