📄 firetrap.c
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/***************************************************************************
Fire Trap memory map (preliminary)
Z80:
0000-7fff ROM
8000-bfff Banked ROM (4 banks)
c000-cfff RAM
d000-d7ff bg #1 video/color RAM (alternating pages 0x100 long)
d000-dfff bg #2 video/color RAM (alternating pages 0x100 long)
e000-e3ff fg video RAM
e400-e7ff fg color RAM
e800-e97f sprites RAM
memory mapped ports:
read:
f010 IN0
f011 IN1
f012 IN2
f013 DSW0
f014 DSW1
f015 from pin 10 of 8751 controller
f016 from port #1 of 8751 controller
write:
f000 IRQ acknowledge
f001 sound command (also causes NMI on sound CPU)
f002 ROM bank selection
f003 flip screen
f004 NMI disable
f005 to port #2 of 8751 controller (signal on P3.2)
f008-f009 bg #1 y scroll
f00a-f00b bg #1 x scroll
f00c-f00d bg #2 y scroll
f00e-f00f bg #2 x scroll
interrupts:
VBlank triggers NMI.
the 8751 triggers IRQ
6502:
0000-07ff RAM
4000-7fff Banked ROM (2 banks)
8000-ffff ROM
read:
3400 command from the main cpu
write:
1000-1001 YM3526
2000 ADPCM data for the MSM5205 chip
2400 bit 0 = to sound chip MSM5205 (1 = play sample); bit 1 = IRQ enable
2800 ROM bank select
8751:
Who knows, it's protected. The bootleg doesn't have it.
***************************************************************************/
#include "driver.h"
#include "vidhrdw/generic.h"
#include "M6502/m6502.h"
extern unsigned char *firetrap_bg1videoram,*firetrap_bg2videoram;
extern unsigned char *firetrap_videoram,*firetrap_colorram;
extern unsigned char *firetrap_scroll1x,*firetrap_scroll1y;
extern unsigned char *firetrap_scroll2x,*firetrap_scroll2y;
extern int firetrap_bgvideoram_size;
extern int firetrap_videoram_size;
void firetrap_bg1videoram_w(int offset,int data);
void firetrap_bg2videoram_w(int offset,int data);
void firetrap_flipscreen_w(int offset,int data);
int firetrap_vh_start(void);
void firetrap_vh_stop(void);
void firetrap_vh_convert_color_prom(unsigned char *palette, unsigned short *colortable,const unsigned char *color_prom);
void firetrap_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh);
static int firetrap_irq_enable = 0;
void firetrap_nmi_disable_w(int offset,int data)
{
interrupt_enable_w(offset,~data & 1);
}
void firetrap_bankselect_w(int offset,int data)
{
int bankaddress;
unsigned char *RAM = Machine->memory_region[Machine->drv->cpu[0].memory_region];
bankaddress = 0x10000 + (data & 0x03) * 0x4000;
cpu_setbank(1,&RAM[bankaddress]);
}
int firetrap_8751_r(int offset)
{
/* Check for coin insertion */
/* the following only works in the bootleg version, which doesn't have an */
/* 8751 - the real thing is much more complicated than that. */
if ((readinputport(2) & 0x70) != 0x70) return 0xff;
else return 0;
}
void firetrap_8751_w(int offset,int data)
{
cpu_cause_interrupt(0,0xff);
}
static void firetrap_sound_command_w(int offset,int data)
{
soundlatch_w(offset,data);
cpu_cause_interrupt(1,M6502_INT_NMI);
}
static void firetrap_sound_2400_w(int offset,int data)
{
MSM5205_reset_w(offset,~data & 0x01);
firetrap_irq_enable = data & 0x02;
}
void firetrap_sound_bankselect_w(int offset,int data)
{
int bankaddress;
unsigned char *RAM = Machine->memory_region[Machine->drv->cpu[1].memory_region];
bankaddress = 0x10000 + (data & 0x01) * 0x4000;
cpu_setbank(2,&RAM[bankaddress]);
}
void firetrap_adpcm_int (int data)
{
static int toggle;
toggle = 1 - toggle;
if (firetrap_irq_enable && toggle)
cpu_cause_interrupt (1, M6502_INT_IRQ);
}
void firetrap_adpcm_data_w (int offset, int data)
{
MSM5205_data_w (offset, data >> 4);
MSM5205_data_w (offset, data);
}
static struct MemoryReadAddress readmem[] =
{
{ 0x0000, 0x7fff, MRA_ROM },
{ 0x8000, 0xbfff, MRA_BANK1 },
{ 0xc000, 0xe97f, MRA_RAM },
{ 0xf010, 0xf010, input_port_0_r },
{ 0xf011, 0xf011, input_port_1_r },
{ 0xf012, 0xf012, input_port_2_r },
{ 0xf013, 0xf013, input_port_3_r },
{ 0xf014, 0xf014, input_port_4_r },
{ 0xf016, 0xf016, firetrap_8751_r },
{ 0xf800, 0xf8ff, MRA_ROM }, /* extra ROM in the bootleg with unprotection code */
{ -1 } /* end of table */
};
static struct MemoryWriteAddress writemem[] =
{
{ 0x0000, 0xbfff, MWA_ROM },
{ 0xc000, 0xcfff, MWA_RAM },
{ 0xd000, 0xd7ff, firetrap_bg1videoram_w, &firetrap_bg1videoram, &firetrap_bgvideoram_size },
{ 0xd800, 0xdfff, firetrap_bg2videoram_w, &firetrap_bg2videoram },
{ 0xe000, 0xe3ff, MWA_RAM, &firetrap_videoram, &firetrap_videoram_size },
{ 0xe400, 0xe7ff, MWA_RAM, &firetrap_colorram },
{ 0xe800, 0xe97f, MWA_RAM, &spriteram, &spriteram_size },
{ 0xf000, 0xf000, MWA_NOP }, /* IRQ acknowledge */
{ 0xf001, 0xf001, firetrap_sound_command_w },
{ 0xf002, 0xf002, firetrap_bankselect_w },
{ 0xf003, 0xf003, firetrap_flipscreen_w },
{ 0xf004, 0xf004, firetrap_nmi_disable_w },
{ 0xf008, 0xf009, MWA_RAM, &firetrap_scroll1y },
{ 0xf00a, 0xf00b, MWA_RAM, &firetrap_scroll1x },
{ 0xf00c, 0xf00d, MWA_RAM, &firetrap_scroll2y },
{ 0xf00e, 0xf00f, MWA_RAM, &firetrap_scroll2x },
{ -1 } /* end of table */
};
static struct MemoryReadAddress sound_readmem[] =
{
{ 0x0000, 0x07ff, MRA_RAM },
{ 0x3400, 0x3400, soundlatch_r },
{ 0x4000, 0x7fff, MRA_BANK2 },
{ 0x8000, 0xffff, MRA_ROM },
{ -1 } /* end of table */
};
static struct MemoryWriteAddress sound_writemem[] =
{
{ 0x0000, 0x07ff, MWA_RAM },
{ 0x1000, 0x1000, YM3526_control_port_0_w },
{ 0x1001, 0x1001, YM3526_write_port_0_w },
{ 0x2000, 0x2000, firetrap_adpcm_data_w }, /* ADPCM data for the MSM5205 chip */
{ 0x2400, 0x2400, firetrap_sound_2400_w },
{ 0x2800, 0x2800, firetrap_sound_bankselect_w },
{ 0x4000, 0xffff, MWA_ROM },
{ -1 } /* end of table */
};
INPUT_PORTS_START( input_ports )
PORT_START /* IN0 */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_UP | IPF_4WAY )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_DOWN | IPF_4WAY )
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_LEFT | IPF_4WAY )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_RIGHT | IPF_4WAY )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_UP | IPF_4WAY )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_DOWN | IPF_4WAY )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_LEFT | IPF_4WAY )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_RIGHT | IPF_4WAY )
PORT_START /* IN1 */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_UP | IPF_4WAY | IPF_COCKTAIL )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_DOWN | IPF_4WAY | IPF_COCKTAIL )
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_LEFT | IPF_4WAY | IPF_COCKTAIL )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_RIGHT | IPF_4WAY | IPF_COCKTAIL )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_UP | IPF_4WAY | IPF_COCKTAIL )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_DOWN | IPF_4WAY | IPF_COCKTAIL )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_LEFT | IPF_4WAY | IPF_COCKTAIL )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_RIGHT | IPF_4WAY | IPF_COCKTAIL )
PORT_START /* IN2 */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON1 )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START1 )
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_COCKTAIL )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_START2 )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_COIN3 ) /* bootleg only */
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_COIN1 ) /* bootleg only */
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN2 ) /* bootleg only */
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_VBLANK )
PORT_START /* DSW0 */
PORT_DIPNAME( 0x07, 0x07, "Coin A", IP_KEY_NONE )
PORT_DIPSETTING( 0x07, "1 Coin/1 Credit" )
PORT_DIPSETTING( 0x06, "1 Coin/2 Credits" )
PORT_DIPSETTING( 0x05, "1 Coin/3 Credits" )
PORT_DIPSETTING( 0x03, "1 Coin/4 Credits" )
PORT_DIPSETTING( 0x04, "1 Coin/6 Credits" )
PORT_DIPNAME( 0x18, 0x18, "Coin B", IP_KEY_NONE )
PORT_DIPSETTING( 0x00, "4 Coins/1 Credit" )
PORT_DIPSETTING( 0x08, "3 Coins/1 Credit" )
PORT_DIPSETTING( 0x10, "2 Coins/1 Credit" )
PORT_DIPSETTING( 0x18, "1 Coin/1 Credit" )
PORT_DIPNAME( 0x20, 0x00, "Cabinet", IP_KEY_NONE )
PORT_DIPSETTING( 0x00, "Upright" )
PORT_DIPSETTING( 0x20, "Cocktail" )
PORT_DIPNAME( 0x40, 0x40, "Demo Sounds", IP_KEY_NONE )
PORT_DIPSETTING( 0x00, "Off" )
PORT_DIPSETTING( 0x40, "On" )
PORT_DIPNAME( 0x80, 0x80, "Flip Screen", IP_KEY_NONE )
PORT_DIPSETTING( 0x80, "Off" )
PORT_DIPSETTING( 0x00, "On" )
PORT_START /* DSW1 */
PORT_DIPNAME( 0x03, 0x03, "Difficulty", IP_KEY_NONE )
PORT_DIPSETTING( 0x02, "Easy" )
PORT_DIPSETTING( 0x03, "Normal" )
PORT_DIPSETTING( 0x01, "Hard" )
PORT_DIPSETTING( 0x00, "Hardest" )
PORT_DIPNAME( 0x0c, 0x0c, "Lives", IP_KEY_NONE )
PORT_DIPSETTING( 0x00, "1" )
PORT_DIPSETTING( 0x0c, "3" )
PORT_DIPSETTING( 0x08, "4" )
PORT_DIPSETTING( 0x04, "5" )
PORT_DIPNAME( 0x30, 0x30, "Bonus Life", IP_KEY_NONE )
PORT_DIPSETTING( 0x30, "50000 70000" )
PORT_DIPSETTING( 0x20, "60000 80000" )
PORT_DIPSETTING( 0x10, "80000 100000" )
PORT_DIPSETTING( 0x00, "50000" )
PORT_DIPNAME( 0x40, 0x40, "Allow Continue", IP_KEY_NONE )
PORT_DIPSETTING( 0x40, "Yes" )
PORT_DIPSETTING( 0x00, "No" )
PORT_BITX( 0x80, 0x80, IPT_DIPSWITCH_NAME | IPF_TOGGLE, "Service Mode", OSD_KEY_F2, IP_JOY_NONE, 0 )
PORT_DIPSETTING( 0x80, "Off" )
PORT_DIPSETTING( 0x00, "On" )
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