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|
/***************************************************************************
a7800.c
Driver file to handle emulation of the Atari 7800.
Dan Boris
2002/05/13 kubecj added more banks for bankswitching
added PAL machine description
changed clock to be precise
2012/10/25 Robert Tuccitto NTSC Color Generator utilized for
color palette with hue shift/start
based on observation of several
systems across multiple displays
2012/11/09 Robert Tuccitto Fixed 3 degree hue begin point
miscalculation of color palette
2012/12/05 Robert Tuccitto Implemented proper IRE and phase
value to the palette
2012/12/14 Robert Tuccitto Adjusted colorburst/tint/hue of entire
palette to closer reflect default hardware configuration
setting of ~180 degrees. Palette settings now correspond
documented and calculated settings as follows:
Contrast = 0.0526 --> 0.05
Brightness = 0.0 --> 0.00
Color = 0.2162 --> 0.22
Phase = 25.714 --> 25.7
Colorburst/Hue = 180 degrees
2013/02/27 Robert Tuccitto Palette rebuild due to misaligned
data references. Corrected PAL color sequence order.
***************************************************************************/
#include "emu.h"
#include "cpu/m6502/m6502.h"
#include "sound/pokey.h"
#include "sound/tiaintf.h"
#include "imagedev/cartslot.h"
#include "machine/6532riot.h"
#include "includes/a7800.h"
#define A7800_NTSC_Y1 XTAL_14_31818MHz
#define CLK_PAL 1773447
/***************************************************************************
ADDRESS MAPS
***************************************************************************/
static ADDRESS_MAP_START( a7800_mem, AS_PROGRAM, 8, a7800_state )
AM_RANGE(0x0000, 0x001f) AM_MIRROR(0x300) AM_READWRITE(a7800_TIA_r, a7800_TIA_w)
AM_RANGE(0x0020, 0x003f) AM_MIRROR(0x300) AM_READWRITE(a7800_MARIA_r, a7800_MARIA_w)
AM_RANGE(0x0040, 0x00ff) AM_READ_BANK("bank5") AM_WRITE(a7800_RAM0_w) /* RAM (6116 block 0) */
AM_RANGE(0x0140, 0x01ff) AM_RAMBANK("bank6") /* RAM (6116 block 1) */
AM_RANGE(0x0280, 0x02ff) AM_DEVREADWRITE_LEGACY("riot", riot6532_r, riot6532_w)
AM_RANGE(0x0480, 0x04ff) AM_MIRROR(0x100) AM_RAM /* RIOT RAM */
AM_RANGE(0x1800, 0x27ff) AM_RAM
AM_RANGE(0x2800, 0x2fff) AM_RAMBANK("bank7") /* MAINRAM */
AM_RANGE(0x3000, 0x37ff) AM_RAMBANK("bank7") /* MAINRAM */
AM_RANGE(0x3800, 0x3fff) AM_RAMBANK("bank7") /* MAINRAM */
AM_RANGE(0x4000, 0x7fff) AM_ROMBANK("bank1") /* f18 hornet */
AM_RANGE(0x8000, 0x9fff) AM_ROMBANK("bank2") /* sc */
AM_RANGE(0xa000, 0xbfff) AM_ROMBANK("bank3") /* sc + ac */
AM_RANGE(0xc000, 0xdfff) AM_ROMBANK("bank4") /* ac */
AM_RANGE(0xe000, 0xffff) AM_ROM
AM_RANGE(0x4000, 0xffff) AM_WRITE(a7800_cart_w)
ADDRESS_MAP_END
/***************************************************************************
INPUT PORTS
***************************************************************************/
static INPUT_PORTS_START( a7800 )
PORT_START("joysticks") /* IN0 */
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP) PORT_PLAYER(2) PORT_8WAY
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN) PORT_PLAYER(2) PORT_8WAY
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT) PORT_PLAYER(2) PORT_8WAY
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT) PORT_PLAYER(2) PORT_8WAY
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_UP) PORT_PLAYER(1) PORT_8WAY
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN) PORT_PLAYER(1) PORT_8WAY
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT) PORT_PLAYER(1) PORT_8WAY
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT) PORT_PLAYER(1) PORT_8WAY
PORT_START("buttons") /* IN1 */
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_PLAYER(2)
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_PLAYER(1)
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_BUTTON2) PORT_PLAYER(2)
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_BUTTON2) PORT_PLAYER(1)
PORT_BIT(0xF0, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("vblank") /* IN2 */
PORT_BIT(0x7F, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_CUSTOM) PORT_VBLANK("screen")
PORT_START("console_buttons") /* IN3 */
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_OTHER) PORT_NAME("Reset") PORT_CODE(KEYCODE_R)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_OTHER) PORT_NAME("Select") PORT_CODE(KEYCODE_S)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_OTHER) PORT_NAME(DEF_STR(Pause)) PORT_CODE(KEYCODE_O)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_DIPNAME(0x40, 0x00, "Left Difficulty Switch")
PORT_DIPSETTING(0x40, "A" )
PORT_DIPSETTING(0x00, "B" )
PORT_DIPNAME(0x80, 0x00, "Right Difficulty Switch")
PORT_DIPSETTING(0x80, "A" )
PORT_DIPSETTING(0x00, "B" )
INPUT_PORTS_END
/***************************************************************************
PALETTE
***************************************************************************/
#define NTSC_GREY \
MAKE_RGB(0x00,0x00,0x00), MAKE_RGB(0x12,0x12,0x12), MAKE_RGB(0x24,0x24,0x24), MAKE_RGB(0x36,0x36,0x36), \
MAKE_RGB(0x47,0x47,0x47), MAKE_RGB(0x59,0x59,0x59), MAKE_RGB(0x6B,0x6B,0x6B), MAKE_RGB(0x7D,0x7D,0x7D), \
MAKE_RGB(0x8F,0x8F,0x8F), MAKE_RGB(0xA1,0xA1,0xA1), MAKE_RGB(0xB2,0xB2,0xB2), MAKE_RGB(0xC4,0xC4,0xC4), \
MAKE_RGB(0xD6,0xD6,0xD6), MAKE_RGB(0xE8,0xE8,0xE8), MAKE_RGB(0xFA,0xFA,0xFA), MAKE_RGB(0xFF,0xFF,0xFF )
#define NTSC_GOLD \
MAKE_RGB(0x1D,0x02,0x00), MAKE_RGB(0x32,0x11,0x00), MAKE_RGB(0x45,0x20,0x00), MAKE_RGB(0x5A,0x2F,0x00), \
MAKE_RGB(0x6F,0x3E,0x00), MAKE_RGB(0x83,0x4D,0x00), MAKE_RGB(0x97,0x5D,0x00), MAKE_RGB(0xA9,0x6F,0x0F), \
MAKE_RGB(0xBB,0x81,0x21), MAKE_RGB(0xCC,0x92,0x33), MAKE_RGB(0xDE,0xA4,0x45), MAKE_RGB(0xF0,0xB6,0x57), \
MAKE_RGB(0xFF,0xC8,0x69), MAKE_RGB(0xFF,0xDB,0x7C), MAKE_RGB(0xFF,0xEF,0x93), MAKE_RGB(0xFF,0xF1,0xA5 )
#define NTSC_ORANGE \
MAKE_RGB(0x32,0x00,0x00), MAKE_RGB(0x45,0x00,0x00), MAKE_RGB(0x5A,0x0B,0x00), MAKE_RGB(0x6E,0x1A,0x00), \
MAKE_RGB(0x82,0x2A,0x00), MAKE_RGB(0x94,0x3C,0x00), MAKE_RGB(0xA6,0x4D,0x11), MAKE_RGB(0xB8,0x5F,0x23), \
MAKE_RGB(0xCA,0x71,0x35), MAKE_RGB(0xDC,0x83,0x47), MAKE_RGB(0xEE,0x95,0x58), MAKE_RGB(0xFF,0xA7,0x6B), \
MAKE_RGB(0xFF,0xBA,0x7F), MAKE_RGB(0xFF,0xCE,0x96), MAKE_RGB(0xFF,0xE2,0xAE), MAKE_RGB(0xFF,0xE2,0xAE )
#define NTSC_RED_ORANGE \
MAKE_RGB(0x3E,0x00,0x00), MAKE_RGB(0x50,0x00,0x00), MAKE_RGB(0x62,0x00,0x00), MAKE_RGB(0x74,0x0E,0x01), \
MAKE_RGB(0x86,0x20,0x13), MAKE_RGB(0x98,0x31,0x25), MAKE_RGB(0xA9,0x43,0x37), MAKE_RGB(0xBB,0x55,0x49), \
MAKE_RGB(0xCD,0x67,0x5B), MAKE_RGB(0xDF,0x79,0x6C), MAKE_RGB(0xF1,0x8B,0x7E), MAKE_RGB(0xFF,0x9C,0x91), \
MAKE_RGB(0xFF,0xB1,0xA9), MAKE_RGB(0xFF,0xC6,0xC0), MAKE_RGB(0xFF,0xDA,0xD7), MAKE_RGB(0xFF,0xEF,0xEE )
#define NTSC_PINK \
MAKE_RGB(0x3A,0x00,0x06), MAKE_RGB(0x4A,0x00,0x13), MAKE_RGB(0x59,0x00,0x20), MAKE_RGB(0x6B,0x0B,0x31), \
MAKE_RGB(0x7D,0x1D,0x43), MAKE_RGB(0x8F,0x2F,0x55), MAKE_RGB(0x9F,0x41,0x67), MAKE_RGB(0xB2,0x52,0x78), \
MAKE_RGB(0xC4,0x64,0x8A), MAKE_RGB(0xD6,0x76,0x9C), MAKE_RGB(0xE8,0x88,0xAE), MAKE_RGB(0xF6,0x9B,0xC1), \
MAKE_RGB(0xF6,0xB0,0xD9), MAKE_RGB(0xF6,0xC3,0xED), MAKE_RGB(0xF9,0xD5,0xF2), MAKE_RGB(0xFB,0xE7,0xF8 )
#define NTSC_PURPLE \
MAKE_RGB(0x27,0x03,0x38), MAKE_RGB(0x37,0x03,0x45), MAKE_RGB(0x46,0x03,0x51), MAKE_RGB(0x56,0x11,0x62), \
MAKE_RGB(0x68,0x23,0x74), MAKE_RGB(0x7A,0x35,0x85), MAKE_RGB(0x8C,0x47,0x97), MAKE_RGB(0x9E,0x59,0xA9), \
MAKE_RGB(0xB0,0x6B,0xBB), MAKE_RGB(0xC2,0x7C,0xCD), MAKE_RGB(0xD3,0x8E,0xDF), MAKE_RGB(0xE7,0x9E,0xE4), \
MAKE_RGB(0xF3,0xAF,0xE7), MAKE_RGB(0xF6,0xC1,0xEC), MAKE_RGB(0xF8,0xD3,0xF2), MAKE_RGB(0xFB,0xE4,0xF7 )
#define NTSC_PURPLE_BLUE \
MAKE_RGB(0x0D,0x0B,0x5F), MAKE_RGB(0x1B,0x0B,0x6B), MAKE_RGB(0x2B,0x0D,0x78), MAKE_RGB(0x3D,0x1F,0x8A), \
MAKE_RGB(0x4E,0x30,0x9B), MAKE_RGB(0x60,0x42,0xAD), MAKE_RGB(0x72,0x54,0xBF), MAKE_RGB(0x84,0x66,0xD1), \
MAKE_RGB(0x95,0x78,0xE4), MAKE_RGB(0xA9,0x89,0xED), MAKE_RGB(0xBD,0x97,0xEC), MAKE_RGB(0xD2,0xA7,0xEC), \
MAKE_RGB(0xE7,0xB6,0xEC), MAKE_RGB(0xF6,0xC6,0xEE), MAKE_RGB(0xF9,0xD8,0xF3), MAKE_RGB(0xFC,0xEA,0xF9 )
#define NTSC_BLUE1 \
MAKE_RGB(0x00,0x11,0x72), MAKE_RGB(0x00,0x11,0x7F), MAKE_RGB(0x10,0x1F,0x8F), MAKE_RGB(0x20,0x30,0xA1), \
MAKE_RGB(0x33,0x42,0xB2), MAKE_RGB(0x45,0x54,0xC4), MAKE_RGB(0x57,0x66,0xD6), MAKE_RGB(0x69,0x78,0xE8), \
MAKE_RGB(0x7B,0x8A,0xF8), MAKE_RGB(0x90,0x99,0xF8), MAKE_RGB(0xA3,0xA7,0xF8), MAKE_RGB(0xB8,0xB7,0xF8), \
MAKE_RGB(0xCC,0xC6,0xF8), MAKE_RGB(0xE1,0xD5,0xF8), MAKE_RGB(0xF6,0xE5,0xF8), MAKE_RGB(0xFE,0xF6,0xFC )
#define NTSC_BLUE2 \
MAKE_RGB(0x00,0x0F,0x67), MAKE_RGB(0x00,0x1E,0x7C), MAKE_RGB(0x00,0x31,0x91), MAKE_RGB(0x0A,0x43,0xA2), \
MAKE_RGB(0x1C,0x55,0xB5), MAKE_RGB(0x2D,0x68,0xC7), MAKE_RGB(0x3F,0x79,0xD9), MAKE_RGB(0x51,0x8B,0xEB), \
MAKE_RGB(0x63,0x9C,0xFC), MAKE_RGB(0x76,0xAD,0xFF), MAKE_RGB(0x8B,0xBD,0xFF), MAKE_RGB(0x9E,0xCC,0xFF), \
MAKE_RGB(0xB3,0xDA,0xFF), MAKE_RGB(0xC8,0xEA,0xFF), MAKE_RGB(0xDC,0xF9,0xFF), MAKE_RGB(0xF0,0xFF,0xFF )
#define NTSC_LIGHT_BLUE \
MAKE_RGB(0x00,0x17,0x4B), MAKE_RGB(0x00,0x2B,0x62), MAKE_RGB(0x00,0x3F,0x79), MAKE_RGB(0x00,0x53,0x8F), \
MAKE_RGB(0x0C,0x65,0xA0), MAKE_RGB(0x1E,0x77,0xB3), MAKE_RGB(0x30,0x89,0xC4), MAKE_RGB(0x42,0x9B,0xD7), \
MAKE_RGB(0x54,0xAD,0xE9), MAKE_RGB(0x66,0xBE,0xF9), MAKE_RGB(0x77,0xD0,0xFF), MAKE_RGB(0x8B,0xE0,0xFF), \
MAKE_RGB(0xA0,0xF0,0xFF), MAKE_RGB(0xB4,0xFF,0xFF), MAKE_RGB(0xC8,0xFF,0xFF), MAKE_RGB(0xDA,0xFF,0xFF )
#define NTSC_TURQUOISE \
MAKE_RGB(0x00,0x1F,0x21), MAKE_RGB(0x00,0x33,0x38), MAKE_RGB(0x00,0x48,0x50), MAKE_RGB(0x00,0x5C,0x67), \
MAKE_RGB(0x09,0x6F,0x7B), MAKE_RGB(0x1B,0x81,0x8D), MAKE_RGB(0x2D,0x93,0x9F), MAKE_RGB(0x3F,0xA5,0xB1), \
MAKE_RGB(0x50,0xB7,0xC3), MAKE_RGB(0x62,0xC9,0xD5), MAKE_RGB(0x74,0xDA,0xE7), MAKE_RGB(0x86,0xEC,0xF8), \
MAKE_RGB(0x98,0xFE,0xFF), MAKE_RGB(0xAA,0xFF,0xFF), MAKE_RGB(0xBC,0xFF,0xFF), MAKE_RGB(0xCD,0xFF,0xFF )
#define NTSC_GREEN_BLUE \
MAKE_RGB(0x06,0x25,0x0B), MAKE_RGB(0x00,0x37,0x10), MAKE_RGB(0x09,0x49,0x20), MAKE_RGB(0x09,0x5E,0x37), \
MAKE_RGB(0x12,0x71,0x4C), MAKE_RGB(0x24,0x83,0x5D), MAKE_RGB(0x36,0x95,0x6F), MAKE_RGB(0x48,0xA7,0x81), \
MAKE_RGB(0x5A,0xB9,0x93), MAKE_RGB(0x6B,0xCA,0xA5), MAKE_RGB(0x7D,0xDD,0xB7), MAKE_RGB(0x8F,0xEE,0xC9), \
MAKE_RGB(0xA1,0xFF,0xDA), MAKE_RGB(0xB1,0xFF,0xE7), MAKE_RGB(0xC1,0xFF,0xF4), MAKE_RGB(0xCF,0xFF,0xFF )
#define NTSC_GREEN \
MAKE_RGB(0x06,0x27,0x0C), MAKE_RGB(0x09,0x39,0x11), MAKE_RGB(0x0B,0x4B,0x16), MAKE_RGB(0x12,0x5C,0x1B), \
MAKE_RGB(0x27,0x6C,0x1B), MAKE_RGB(0x37,0x7D,0x2D), MAKE_RGB(0x49,0x8F,0x3F), MAKE_RGB(0x5B,0xA1,0x51), \
MAKE_RGB(0x6E,0xB3,0x62), MAKE_RGB(0x80,0xC5,0x74), MAKE_RGB(0x92,0xD7,0x86), MAKE_RGB(0xA4,0xE9,0x98), \
MAKE_RGB(0xB4,0xFA,0xAA), MAKE_RGB(0xC4,0xFC,0xB7), MAKE_RGB(0xD4,0xFC,0xC2), MAKE_RGB(0xE3,0xFC,0xCF )
#define NTSC_YELLOW_GREEN \
MAKE_RGB(0x05,0x22,0x0A), MAKE_RGB(0x08,0x34,0x10), MAKE_RGB(0x12,0x45,0x13), MAKE_RGB(0x27,0x54,0x13), \
MAKE_RGB(0x3C,0x62,0x12), MAKE_RGB(0x50,0x72,0x12), MAKE_RGB(0x65,0x81,0x16), MAKE_RGB(0x76,0x94,0x29), \
MAKE_RGB(0x87,0xA6,0x3B), MAKE_RGB(0x9A,0xB8,0x4D), MAKE_RGB(0xAB,0xC9,0x5E), MAKE_RGB(0xBE,0xDB,0x6F), \
MAKE_RGB(0xCF,0xED,0x81), MAKE_RGB(0xE0,0xF4,0x90), MAKE_RGB(0xEE,0xF4,0x9D), MAKE_RGB(0xFD,0xF4,0xA9 )
#define NTSC_ORANGE_GREEN \
MAKE_RGB(0x03,0x16,0x07), MAKE_RGB(0x18,0x25,0x07), MAKE_RGB(0x2D,0x35,0x07), MAKE_RGB(0x41,0x44,0x07), \
MAKE_RGB(0x56,0x52,0x06), MAKE_RGB(0x6B,0x61,0x06), MAKE_RGB(0x7E,0x71,0x07), MAKE_RGB(0x91,0x82,0x12), \
MAKE_RGB(0xA3,0x94,0x24), MAKE_RGB(0xB5,0xA6,0x36), MAKE_RGB(0xC7,0xB7,0x47), MAKE_RGB(0xD9,0xC9,0x58), \
MAKE_RGB(0xEA,0xDB,0x6B), MAKE_RGB(0xFC,0xED,0x7D), MAKE_RGB(0xFF,0xEE,0x89), MAKE_RGB(0xFF,0xF0,0x9A )
#define NTSC_LIGHT_ORANGE \
MAKE_RGB(0x1D,0x02,0x00), MAKE_RGB(0x32,0x11,0x00), MAKE_RGB(0x45,0x20,0x00), MAKE_RGB(0x5A,0x2F,0x00), \
MAKE_RGB(0x6F,0x3E,0x00), MAKE_RGB(0x83,0x4D,0x00), MAKE_RGB(0x97,0x5D,0x00), MAKE_RGB(0xA9,0x6F,0x0F), \
MAKE_RGB(0xBB,0x81,0x21), MAKE_RGB(0xCC,0x92,0x33), MAKE_RGB(0xDE,0xA4,0x45), MAKE_RGB(0xF0,0xB6,0x57), \
MAKE_RGB(0xFF,0xC8,0x69), MAKE_RGB(0xFF,0xDB,0x7C), MAKE_RGB(0xFF,0xEF,0x93), MAKE_RGB(0xFF,0xF1,0xA5 )
static const rgb_t a7800_palette[256*3] =
{
NTSC_GREY,
NTSC_GOLD,
NTSC_ORANGE,
NTSC_RED_ORANGE,
NTSC_PINK,
NTSC_PURPLE,
NTSC_PURPLE_BLUE,
NTSC_BLUE1,
NTSC_BLUE2,
NTSC_LIGHT_BLUE,
NTSC_TURQUOISE,
NTSC_GREEN_BLUE,
NTSC_GREEN,
NTSC_YELLOW_GREEN,
NTSC_ORANGE_GREEN,
NTSC_LIGHT_ORANGE
};
static const rgb_t a7800p_palette[256*3] =
{
NTSC_GREY,
NTSC_ORANGE_GREEN,
NTSC_GOLD,
NTSC_ORANGE,
NTSC_RED_ORANGE,
NTSC_PINK,
NTSC_PURPLE,
NTSC_PURPLE_BLUE,
NTSC_BLUE1,
NTSC_BLUE2,
NTSC_LIGHT_BLUE,
NTSC_TURQUOISE,
NTSC_GREEN_BLUE,
NTSC_GREEN,
NTSC_YELLOW_GREEN,
NTSC_ORANGE_GREEN
};
/* Initialise the palette */
void a7800_state::palette_init()
{
palette_set_colors(machine(), 0, a7800_palette, ARRAY_LENGTH(a7800_palette));
}
PALETTE_INIT_MEMBER(a7800_state,a7800p)
{
palette_set_colors(machine(), 0, a7800p_palette, ARRAY_LENGTH(a7800p_palette));
}
/***************************************************************************
MACHINE DRIVERS
***************************************************************************/
static MACHINE_CONFIG_START( a7800_ntsc, a7800_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", M6502, A7800_NTSC_Y1/8) /* 1.79 MHz (switches to 1.19 MHz on TIA or RIOT access) */
MCFG_CPU_PROGRAM_MAP(a7800_mem)
MCFG_TIMER_DRIVER_ADD_SCANLINE("scantimer", a7800_state, a7800_interrupt, "screen", 0, 1)
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_REFRESH_RATE(60)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
MCFG_SCREEN_SIZE(640,262)
MCFG_SCREEN_VISIBLE_AREA(0,319,25,45+204)
MCFG_SCREEN_UPDATE_DRIVER(a7800_state, screen_update_a7800)
MCFG_PALETTE_LENGTH(ARRAY_LENGTH(a7800_palette))
/* sound hardware */
MCFG_SPEAKER_STANDARD_MONO("mono")
MCFG_SOUND_TIA_ADD("tia", 31400)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)
MCFG_POKEY_ADD("pokey", A7800_NTSC_Y1/8)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)
/* devices */
MCFG_RIOT6532_ADD("riot", A7800_NTSC_Y1/12, a7800_r6532_interface)
MCFG_CARTSLOT_ADD("cart")
MCFG_CARTSLOT_EXTENSION_LIST("bin,a78")
MCFG_CARTSLOT_NOT_MANDATORY
MCFG_CARTSLOT_LOAD(a7800_state,a7800_cart)
MCFG_CARTSLOT_PARTIALHASH(a7800_partialhash)
MCFG_CARTSLOT_INTERFACE("a7800_cart")
/* software lists */
MCFG_SOFTWARE_LIST_ADD("cart_list","a7800")
MCFG_SOFTWARE_LIST_FILTER("cart_list","NTSC")
MACHINE_CONFIG_END
static MACHINE_CONFIG_DERIVED( a7800_pal, a7800_ntsc )
/* basic machine hardware */
MCFG_CPU_MODIFY("maincpu")
MCFG_CPU_CLOCK(CLK_PAL)
// MCFG_TIMER_ADD_SCANLINE("scantimer", a7800_interrupt, "screen", 0, 1)
MCFG_SCREEN_MODIFY( "screen" )
MCFG_SCREEN_REFRESH_RATE(50)
MCFG_SCREEN_SIZE(640,312)
MCFG_SCREEN_VISIBLE_AREA(0,319,50,50+225)
MCFG_PALETTE_INIT_OVERRIDE(a7800_state, a7800p )
/* sound hardware */
MCFG_DEVICE_REMOVE("pokey")
MCFG_POKEY_ADD("pokey", CLK_PAL)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)
/* devices */
MCFG_DEVICE_REMOVE("riot")
MCFG_RIOT6532_ADD("riot", 3546894/3, a7800_r6532_interface)
/* software lists */
MCFG_DEVICE_REMOVE("cart_list")
MCFG_SOFTWARE_LIST_ADD("cart_list","a7800")
MCFG_SOFTWARE_LIST_FILTER("cart_list","PAL")
MACHINE_CONFIG_END
/***************************************************************************
ROM DEFINITIONS
***************************************************************************/
ROM_START( a7800 )
ROM_REGION(0x40000, "maincpu", 0)
ROM_FILL(0x0000, 0x40000, 0xff)
ROM_SYSTEM_BIOS( 0, "a7800", "Atari 7800" )
ROMX_LOAD("7800.u7", 0xf000, 0x1000, CRC(5d13730c) SHA1(d9d134bb6b36907c615a594cc7688f7bfcef5b43), ROM_BIOS(1))
ROM_SYSTEM_BIOS( 1, "a7800pr", "Atari 7800 (prototype with Asteroids)" )
ROMX_LOAD("c300558-001a.u7", 0xc000, 0x4000, CRC(a0e10edf) SHA1(14584b1eafe9721804782d4b1ac3a4a7313e455f), ROM_BIOS(2))
ROM_END
ROM_START( a7800p )
ROM_REGION(0x40000, "maincpu", 0)
ROM_FILL(0x0000, 0x40000, 0xff)
ROM_LOAD("7800pal.rom", 0xc000, 0x4000, CRC(d5b61170) SHA1(5a140136a16d1d83e4ff32a19409ca376a8df874))
ROM_END
/***************************************************************************
GAME DRIVERS
***************************************************************************/
/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME */
CONS( 1986, a7800, 0, 0, a7800_ntsc, a7800, a7800_state, a7800_ntsc, "Atari", "Atari 7800 (NTSC)" , 0)
CONS( 1986, a7800p, a7800, 0, a7800_pal, a7800, a7800_state, a7800_pal, "Atari", "Atari 7800 (PAL)" , 0)
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