/***************************************************************************
Atari "Stella on Steroids" hardware
driver by Aaron Giles
Games supported:
* BeatHead
Known bugs:
* none known
****************************************************************************
Memory map
===================================================================================================
MAIN CPU
===================================================================================================
00000000-0001FFFFF R/W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx Main RAM
01800000-01BFFFFFF R xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx Main ROM
40000000-4000007FF R/W -------- -------- -------- xxxxxxxx EEPROM
41000000 R -------- -------- -------- xxxxxxxx Data from sound board
41000000 W -------- -------- -------- xxxxxxxx Data to sound board
41000100 R -------- -------- -------- -----xxx Interrupt enables
-------- -------- -------- -----x-- (scanline int enable)
-------- -------- -------- ------x- (unknown int enable)
-------- -------- -------- -------x (unknown int enable)
41000100 W -------- -------- -------- -------- Interrupt acknowledge
41000104 W -------- -------- -------- -------- Unknown int disable
41000108 W -------- -------- -------- -------- Unknown int disable
4100010c W -------- -------- -------- -------- Scanline int disable
41000114 W -------- -------- -------- -------- Unknown int enable
41000118 W -------- -------- -------- -------- Unknown int enable
4100011c W -------- -------- -------- -------- Scanline int enable
41000200 R -------- -------- xxxx--xx xxxx--xx Player 2/3 inputs
R -------- -------- xxxx---- -------- (player 3 joystick UDLR)
R -------- -------- ------x- -------- (player 3 button 1)
R -------- -------- -------x -------- (player 3 button 2)
R -------- -------- -------- xxxx---- (player 2 joystick UDLR)
R -------- -------- -------- ------x- (player 2 button 1)
R -------- -------- -------- -------x (player 2 button 2)
41000204 R -------- -------- xxxx--xx xxxx--xx Player 1/4 inputs
R -------- -------- xxxx---- -------- (player 1 joystick UDLR)
R -------- -------- ------x- -------- (player 1 button 1)
R -------- -------- -------x -------- (player 1 button 2)
R -------- -------- -------- xxxx---- (player 4 joystick UDLR)
R -------- -------- -------- ------x- (player 4 button 1)
R -------- -------- -------- -------x (player 4 button 2)
41000208 W -------- -------- -------- -------- Sound /RESET assert
4100020C W -------- -------- -------- -------- Sound /RESET deassert
41000220 W -------- -------- -------- -------- Coin counter assert
41000224 W -------- -------- -------- -------- Coin counter deassert
41000300 R -------- -------- xxxxxxxx -xxx---- DIP switches/additional inputs
R -------- -------- xxxxxxxx -------- (debug DIP switches)
R -------- -------- -------- -x------ (service switch)
R -------- -------- -------- --x----- (sound output buffer full)
R -------- -------- -------- ---x---- (sound input buffer full)
41000304 R -------- -------- -------- xxxxxxxx Coin/service inputs
R -------- -------- -------- xxxx---- (service inputs: R,RC,LC,L)
R -------- -------- -------- ----xxxx (coin inputs: R,RC,LC,L)
41000400 W -------- -------- -------- -xxxxxxx Palette select
41000500 W -------- -------- -------- -------- EEPROM write enable
41000600 W -------- -------- -------- ----xxxx Finescroll, vertical SYNC flags
W -------- -------- -------- ----x--- (VBLANK)
W -------- -------- -------- -----x-- (VSYNC)
W -------- -------- -------- ------xx (fine scroll value)
41000700 W -------- -------- -------- -------- Watchdog reset
42000000-4201FFFF R/W -------- -------- xxxxxxxx xxxxxxxx Palette RAM
R/W -------- -------- x------- -------- (LSB of all three components)
R/W -------- -------- -xxxxx-- -------- (red component)
R/W -------- -------- ------xx xxx----- (green component)
R/W -------- -------- -------- ---xxxxx (blue component)
43000000 W -------- -------- ----xxxx xxxxxxxx HSYNC RAM address latch
W -------- -------- ----x--- -------- (counter enable)
W -------- -------- -----xxx xxxxxxxx (RAM address)
43000004 R/W -------- -------- -------- xxxxx--- HSYNC RAM data latch
R/W -------- -------- -------- x------- (generate IRQ)
R/W -------- -------- -------- -x------ (VRAM shift enable)
R/W -------- -------- -------- --x----- (HBLANK)
R/W -------- -------- -------- ---x---- (/HSYNC)
R/W -------- -------- -------- ----x--- (release wait for sync)
43000008 W -------- -------- -------- ---x-xx- HSYNC unknown control
8DF80000 R -------- -------- -------- -------- Unknown
8F380000-8F3FFFFF W -------- -------- -------- -------- VRAM latch address
8F900000-8F97FFFF W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx VRAM transparent write
8F980000-8F9FFFFF R/W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx VRAM standard read/write
8FB80000-8FBFFFFF W ----xxxx ----xxxx ----xxxx ----xxxx VRAM "bulk" write
W ----xxxx -------- -------- -------- (enable byte lanes for word 3?)
W -------- ----xxxx -------- -------- (enable byte lanes for word 2?)
W -------- -------- ----xxxx -------- (enable byte lanes for word 1?)
W -------- -------- -------- ----xxxx (enable byte lanes for word 0?)
8FFF8000 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx VRAM "bulk" data latch
9E280000-9E2FFFFF W -------- -------- -------- -------- VRAM copy destination address latch
===================================================================================================
***************************************************************************/
#include "driver.h"
#include "cpu/asap/asap.h"
#include "machine/atarigen.h"
#include "audio/atarijsa.h"
#include "beathead.h"
/*************************************
*
* Statics
*
*************************************/
static UINT32 * ram_base;
static UINT32 * rom_base;
static double hblank_offset;
static UINT8 irq_line_state;
static UINT8 irq_enable[3];
static UINT8 irq_state[3];
static UINT8 eeprom_enabled;
#define MAX_SCANLINES 262
/*************************************
*
* Machine init
*
*************************************/
static void update_interrupts(running_machine *machine);
static TIMER_CALLBACK( scanline_callback )
{
int scanline = param;
/* update the video */
video_screen_update_now(machine->primary_screen);
/* on scanline zero, clear any halt condition */
if (scanline == 0)
cpu_set_input_line(machine->cpu[0], INPUT_LINE_HALT, CLEAR_LINE);
/* wrap around at 262 */
scanline++;
if (scanline >= MAX_SCANLINES)
scanline = 0;
/* set the scanline IRQ */
irq_state[2] = 1;
update_interrupts(machine);
/* set the timer for the next one */
timer_set(machine, double_to_attotime(attotime_to_double(video_screen_get_time_until_pos(machine->primary_screen, scanline, 0)) - hblank_offset), NULL, scanline, scanline_callback);
}
static MACHINE_RESET( beathead )
{
/* reset the common subsystems */
atarigen_eeprom_reset();
atarigen_interrupt_reset(update_interrupts);
atarijsa_reset();
/* the code is temporarily mapped at 0 at startup */
/* just copying the first 0x40 bytes is sufficient */
memcpy(ram_base, rom_base, 0x40);
/* compute the timing of the HBLANK interrupt and set the first timer */
hblank_offset = attotime_to_double(video_screen_get_scan_period(machine->primary_screen)) * ((455. - 336. - 25.) / 455.);
timer_set(machine, double_to_attotime(attotime_to_double(video_screen_get_time_until_pos(machine->primary_screen, 0, 0)) - hblank_offset), NULL, 0, scanline_callback);
/* reset IRQs */
irq_line_state = CLEAR_LINE;
irq_state[0] = irq_state[1] = irq_state[2] = 0;
irq_enable[0] = irq_enable[1] = irq_enable[2] = 0;
}
/*************************************
*
* Interrupt handling
*
*************************************/
static void update_interrupts(running_machine *machine)
{
int gen_int;
/* compute the combined interrupt signal */
gen_int = irq_state[0] & irq_enable[0];
gen_int |= irq_state[1] & irq_enable[1];
gen_int |= irq_state[2] & irq_enable[2];
gen_int = gen_int ? ASSERT_LINE : CLEAR_LINE;
/* if it's changed since the last time, call through */
if (irq_line_state != gen_int)
{
irq_line_state = gen_int;
// if (irq_line_state != CLEAR_LINE)
cpu_set_input_line(machine->cpu[0], ASAP_IRQ0, irq_line_state);
// else
// asap_set_irq_line(ASAP_IRQ0, irq_line_state);
}
}
static WRITE32_HANDLER( interrupt_control_w )
{
int irq = offset & 3;
int control = (offset >> 2) & 1;
/* offsets 1-3 seem to be the enable latches for the IRQs */
if (irq != 0)
irq_enable[irq - 1] = control;
/* offset 0 seems to be the interrupt ack */
else
irq_state[0] = irq_state[1] = irq_state[2] = 0;
/* update the current state */
update_interrupts(space->machine);
}
static READ32_HANDLER( interrupt_control_r )
{
/* return the enables as a bitfield */
return (irq_enable[0]) | (irq_enable[1] << 1) | (irq_enable[2] << 2);
}
/*************************************
*
* EEPROM handling
*
*************************************/
static WRITE32_HANDLER( eeprom_data_w )
{
if (eeprom_enabled)
{
mem_mask &= 0x000000ff;
COMBINE_DATA(generic_nvram32 + offset);
eeprom_enabled = 0;
}
}
static WRITE32_HANDLER( eeprom_enable_w )
{
eeprom_enabled = 1;
}
/*************************************
*
* Input handling
*
*************************************/
static READ32_HANDLER( input_2_r )
{
int result = input_port_read(space->machine, "IN2");
if (atarigen_sound_to_cpu_ready) result ^= 0x10;
if (atarigen_cpu_to_sound_ready) result ^= 0x20;
return result;
}
/*************************************
*
* Sound communication
*
*************************************/
static READ32_HANDLER( sound_data_r )
{
return atarigen_sound_r(space,offset,0xffff);
}
static WRITE32_HANDLER( sound_data_w )
{
if (ACCESSING_BITS_0_7)
atarigen_sound_w(space,offset, data, mem_mask);
}
static WRITE32_HANDLER( sound_reset_w )
{
logerror("Sound reset = %d\n", !offset);
cpu_set_input_line(space->machine->cpu[1], INPUT_LINE_RESET, offset ? CLEAR_LINE : ASSERT_LINE);
}
/*************************************
*
* Misc other I/O
*
*************************************/
static WRITE32_HANDLER( coin_count_w )
{
coin_counter_w(0, !offset);
}
/*************************************
*
* Main CPU memory handlers
*
*************************************/
static ADDRESS_MAP_START( main_map, ADDRESS_SPACE_PROGRAM, 32 )
AM_RANGE(0x00000000, 0x0001ffff) AM_RAM AM_BASE(&ram_base)
AM_RANGE(0x01800000, 0x01bfffff) AM_ROM AM_REGION("user1", 0) AM_BASE(&rom_base)
AM_RANGE(0x40000000, 0x400007ff) AM_RAM_WRITE(eeprom_data_w) AM_BASE(&generic_nvram32) AM_SIZE(&generic_nvram_size)
AM_RANGE(0x41000000, 0x41000003) AM_READWRITE(sound_data_r, sound_data_w)
AM_RANGE(0x41000100, 0x41000103) AM_READ(interrupt_control_r)
AM_RANGE(0x41000100, 0x4100011f) AM_WRITE(interrupt_control_w)
AM_RANGE(0x41000200, 0x41000203) AM_READ_PORT("IN1")
AM_RANGE(0x41000204, 0x41000207) AM_READ_PORT("IN0")
AM_RANGE(0x41000208, 0x4100020f) AM_WRITE(sound_reset_w)
AM_RANGE(0x41000220, 0x41000227) AM_WRITE(coin_count_w)
AM_RANGE(0x41000300, 0x41000303) AM_READ(input_2_r)
AM_RANGE(0x41000304, 0x41000307) AM_READ_PORT("IN3")
AM_RANGE(0x41000400, 0x41000403) AM_WRITE(SMH_RAM) AM_BASE(&beathead_palette_select)
AM_RANGE(0x41000500, 0x41000503) AM_WRITE(eeprom_enable_w)
AM_RANGE(0x41000600, 0x41000603) AM_WRITE(beathead_finescroll_w)
AM_RANGE(0x41000700, 0x41000703) AM_WRITE(watchdog_reset32_w)
AM_RANGE(0x42000000, 0x4201ffff) AM_RAM_WRITE(beathead_palette_w) AM_BASE(&paletteram32)
AM_RANGE(0x43000000, 0x43000007) AM_READWRITE(beathead_hsync_ram_r, beathead_hsync_ram_w)
AM_RANGE(0x8df80000, 0x8df80003) AM_READ(SMH_NOP) /* noisy x4 during scanline int */
AM_RANGE(0x8f380000, 0x8f3fffff) AM_WRITE(beathead_vram_latch_w)
AM_RANGE(0x8f900000, 0x8f97ffff) AM_WRITE(beathead_vram_transparent_w)
AM_RANGE(0x8f980000, 0x8f9fffff) AM_RAM AM_BASE(&videoram32)
AM_RANGE(0x8fb80000, 0x8fbfffff) AM_WRITE(beathead_vram_bulk_w)
AM_RANGE(0x8fff8000, 0x8fff8003) AM_WRITE(SMH_RAM) AM_BASE(&beathead_vram_bulk_latch)
AM_RANGE(0x9e280000, 0x9e2fffff) AM_WRITE(beathead_vram_copy_w)
ADDRESS_MAP_END
/*************************************
*
* Port definitions
*
*************************************/
static INPUT_PORTS_START( beathead )
PORT_START("IN0") /* Player 1 */
PORT_BIT( 0x00ff, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1)
PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(1)
PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(1)
PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(1)
PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(1)
PORT_START("IN1") /* Player 2 */
PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2)
PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2)
PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2)
PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(2)
PORT_BIT( 0xff00, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START("IN2")
PORT_BIT( 0x000f, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_SPECIAL )
PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_SPECIAL )
PORT_SERVICE( 0x0040, IP_ACTIVE_LOW )
PORT_BIT( 0xff80, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START("IN3")
PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_COIN1 )
PORT_BIT( 0x0006, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_COIN2 )
PORT_BIT( 0xfff0, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_INCLUDE( atarijsa_iii ) /* audio board port */
INPUT_PORTS_END
/*************************************
*
* Machine driver
*
*************************************/
static MACHINE_DRIVER_START( beathead )
/* basic machine hardware */
MDRV_CPU_ADD("maincpu", ASAP, ATARI_CLOCK_14MHz)
MDRV_CPU_PROGRAM_MAP(main_map,0)
MDRV_MACHINE_RESET(beathead)
MDRV_NVRAM_HANDLER(generic_1fill)
/* video hardware */
MDRV_VIDEO_ATTRIBUTES(VIDEO_UPDATE_BEFORE_VBLANK)
MDRV_SCREEN_ADD("screen", RASTER)
MDRV_SCREEN_REFRESH_RATE(60)
MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
MDRV_SCREEN_SIZE(42*8, 262)
MDRV_SCREEN_VISIBLE_AREA(0*8, 42*8-1, 0*8, 30*8-1)
MDRV_PALETTE_LENGTH(32768)
MDRV_VIDEO_START(beathead)
MDRV_VIDEO_UPDATE(beathead)
/* sound hardware */
MDRV_IMPORT_FROM(jsa_iii_mono)
MACHINE_DRIVER_END
/*************************************
*
* ROM definition(s)
*
*************************************/
ROM_START( beathead )
ROM_REGION( 0x14000, "jsa", 0 ) /* 64k + 16k for 6502 code */
ROM_LOAD( "bhsnd.bin", 0x10000, 0x4000, CRC(dfd33f02) SHA1(479a4838c89691d5a4654a4cd84b6433a9e86109) )
ROM_CONTINUE( 0x04000, 0xc000 )
ROM_REGION32_LE( 0x400000, "user1", 0 ) /* 4MB for ASAP code */
ROM_LOAD32_BYTE( "bhprog0.bin", 0x000000, 0x80000, CRC(87975721) SHA1(862cb3a290c829aedea26ee7100c50a12e9517e7) )
ROM_LOAD32_BYTE( "bhprog1.bin", 0x000001, 0x80000, CRC(25d89743) SHA1(9ff9a41355aa6914efc4a44909026e648a3c40f3) )
ROM_LOAD32_BYTE( "bhprog2.bin", 0x000002, 0x80000, CRC(87722609) SHA1(dbd766fa57f4528702a98db28ae48fb5d2a7f7df) )
ROM_LOAD32_BYTE( "bhprog3.bin", 0x000003, 0x80000, CRC(a795d616) SHA1(d3b201be62486f3b12e1b20c4694eeff0b4e3fca) )
ROM_LOAD32_BYTE( "bhpics0.bin", 0x200000, 0x80000, CRC(926bf65d) SHA1(49f25a2844ca1cd940d17fc56c0d2698e95e0e1d) )
ROM_LOAD32_BYTE( "bhpics1.bin", 0x200001, 0x80000, CRC(a8f12e41) SHA1(693cb7a2510f34af5442870a6ae4d19445d991f9) )
ROM_LOAD32_BYTE( "bhpics2.bin", 0x200002, 0x80000, CRC(00b96481) SHA1(39daa46321c1d4f8bce8c25d0450b97f1f19dedb) )
ROM_LOAD32_BYTE( "bhpics3.bin", 0x200003, 0x80000, CRC(99c4f1db) SHA1(aba4440c5cdf413f970a0c65457e2d1b37caf2d6) )
ROM_REGION( 0x100000, "adpcm", 0 ) /* 1MB for ADPCM */
ROM_LOAD( "bhpcm0.bin", 0x80000, 0x20000, CRC(609ca626) SHA1(9bfc913fc4c3453b132595f8553245376bce3a51) )
ROM_LOAD( "bhpcm1.bin", 0xa0000, 0x20000, CRC(35511509) SHA1(41294b81e253db5d2f30f8589dd59729a31bb2bb) )
ROM_LOAD( "bhpcm2.bin", 0xc0000, 0x20000, CRC(f71a840a) SHA1(09d045552704cd1434307f9a36ce03c5c06a8ff6) )
ROM_LOAD( "bhpcm3.bin", 0xe0000, 0x20000, CRC(fedd4936) SHA1(430ed894fa4bfcd56ee5a8a8ef5e161246530e2d) )
ROM_END
/*************************************
*
* Driver speedups
*
*************************************/
/*
In-game hotspot @ 0180F8D8
*/
static UINT32 *speedup_data;
static READ32_HANDLER( speedup_r )
{
int result = *speedup_data;
if ((cpu_get_previouspc(space->cpu) & 0xfffff) == 0x006f0 && result == cpu_get_reg(space->cpu, ASAP_R3))
cpu_spinuntil_int(space->cpu);
return result;
}
static UINT32 *movie_speedup_data;
static READ32_HANDLER( movie_speedup_r )
{
int result = *movie_speedup_data;
if ((cpu_get_previouspc(space->cpu) & 0xfffff) == 0x00a88 && (cpu_get_reg(space->cpu, ASAP_R28) & 0xfffff) == 0x397c0 &&
movie_speedup_data[4] == cpu_get_reg(space->cpu, ASAP_R1))
{
UINT32 temp = (INT16)result + movie_speedup_data[4] * 262;
if (temp - (UINT32)cpu_get_reg(space->cpu, ASAP_R15) < (UINT32)cpu_get_reg(space->cpu, ASAP_R23))
cpu_spinuntil_int(space->cpu);
}
return result;
}
/*************************************
*
* Driver initialization
*
*************************************/
static DRIVER_INIT( beathead )
{
/* initialize the common systems */
atarigen_eeprom_default = NULL;
atarijsa_init(machine, "IN2", 0x0040);
/* prepare the speedups */
speedup_data = memory_install_read32_handler(cpu_get_address_space(machine->cpu[0], ADDRESS_SPACE_PROGRAM), 0x00000ae8, 0x00000aeb, 0, 0, speedup_r);
movie_speedup_data = memory_install_read32_handler(cpu_get_address_space(machine->cpu[0], ADDRESS_SPACE_PROGRAM), 0x00000804, 0x00000807, 0, 0, movie_speedup_r);
}
/*************************************
*
* Game driver(s)
*
*************************************/
GAME( 1993, beathead, 0, beathead, beathead, beathead, ROT0, "Atari Games", "BeatHead (prototype)", 0 )