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- Driver clean-up, including driver state

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- Tried improving on the ROM mirroring, without any success.  Maybe somebody could look into it -- right now it requires all kinds of trickery and even a memcpy ;)  All I know is that everything that's there right now is needed otherwise either the game fails the ROM test, or Galaga crashes
This commit is contained in:
Zsolt Vasvari 2008-01-28 06:06:27 +00:00
parent 340d21a577
commit e424adb362
4 changed files with 457 additions and 274 deletions
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1
.gitattributes vendored
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@ -2093,6 +2093,7 @@ src/mame/drivers/zodiack.c svneol=native#text/plain
src/mame/drivers/zr107.c svneol=native#text/plain
src/mame/etc/fd1094dp.c svneol=native#text/plain
src/mame/etc/jrcrypt.c svneol=native#text/plain
src/mame/includes/20pacgal.h svneol=native#text/plain
src/mame/includes/8080bw.h svneol=native#text/plain
src/mame/includes/amiga.h svneol=native#text/plain
src/mame/includes/appoooh.h svneol=native#text/plain

315
src/mame/drivers/20pacgal.c
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@ -1,73 +1,101 @@
/***************************************************************************
Ms.Pac-Man/Galaga - 20 Year Reunion
Ms.Pac-Man/Galaga - 20 Year Reunion hardware
driver by Nicola Salmoria
driver by Nicola Salmoria
Notes:
- There are four start buttons: the first two are for Ms. Pac-Man, the other two
for Galaga.
Notes:
* There are four start buttons: the first two are for Ms. Pac-Man, the other two
for Galaga.
* To play Pac-Man instead of Ms. Pac-Man, insert coins then enter the following
sequence: U U U D D D L R L R L. A sound will play and the ghost will change
from red to pink.
* Writes to the Z180 ASCI port:
MS PAC-MAN/GALAGA
arcade video system
version 1.01
(c) 2000 Cosmodog, Ltd.
>
and it listens for incoming characters.
- To play Pac-Man instead of Ms. Pac-Man, insert coins then enter the following
sequence: U U U D D D L R L R L. A sound will play and the ghost will change
from red to pink.
- Writes to the Z180 ASCI port:
MS PAC-MAN/GALAGA
arcade video system
version 1.01
(c) 2000 Cosmodog, Ltd.
>
and it listens for incoming characters.
TODO:
- Starfield.
- Convert to tilemaps & optimize video rendering, I was just too lazy to do it for now.
- Check the ASCI interface, there probably is fully working debug code.
- The timed interrupt is a kludge; it is supposed to be generated internally by
the Z180, but the cpu core doesn't support that yet.
- Correct CPU speed... Zilog says Z180 comes in 6, 8, 10, 20 & 33MHz.
20MHz is used as it "seems" right based on the music in Galaga
Known issues/to-do's:
* Crashed on reset - Z180 core problem?
* ROM banking is not understood. Shouldn't require copying and other
trickey
* Starfield missing
* Check the ASCI interface, there probably is fully working debug code.
* The timed interrupt is a kludge; it is supposed to be generated internally by
the Z180, but the cpu core doesn't support that yet.
* Correct CPU speed... Zilog says Z180 comes in 6, 8, 10, 20 & 33MHz.
20MHz is used as it "seems" right based on the music in Galaga
***************************************************************************/
#include "driver.h"
#include "deprecat.h"
#include "machine/eeprom.h"
#include "cpu/z180/z180.h"
#include "pacman.h"
#include "sound/namco.h"
#include "sound/dac.h"
extern UINT8 *pacgal_charram,*pacgal_sprram;
extern UINT8 *pacgal_videoram,*pacgal_videoram2;
PALETTE_INIT( 20pacgal );
VIDEO_START( 20pacgal );
WRITE8_HANDLER( pacgal_lookup_w );
WRITE8_HANDLER( pacgal_active_game_w );
WRITE8_HANDLER( pacgal_videoram2_w );
WRITE8_HANDLER( pacgal_charram_w );
WRITE8_HANDLER( pacgal_sprram_w );
VIDEO_UPDATE( 20pacgal );
#include "20pacgal.h"
/*************************************
*
* Interrupt system
*
*************************************/
static WRITE8_HANDLER( irqack_w )
{
int bit = data & 1;
cpu_interrupt_enable(0, bit);
if (!bit)
cpunum_set_input_line(Machine, 0, 0, CLEAR_LINE );
}
/*************************************
*
* Audio
*
*************************************/
static const struct namco_interface namco_interface =
{
3, /* number of voices */
-1, /* memory region */
};
static WRITE8_HANDLER( _20pacgal_dac_w )
{
DAC_signed_data_w(0, data);
}
/*************************************
*
* Non-volatile memory
*
*************************************/
static const struct EEPROM_interface eeprom_interface =
{
7, /* address bits */
8, /* data bits */
"*110", /* read command */
"*110", /* read command */
"*101", /* write command */
0, /* erase command */
"*10000xxxxx", /* lock command */
"*10011xxxxx", /* unlock command */
};
static NVRAM_HANDLER( eeprom )
{
if (read_or_write)
@ -81,15 +109,14 @@ static NVRAM_HANDLER( eeprom )
}
}
static READ8_HANDLER( eeprom_r )
{
int res;
/* bit 7 is EEPROM data */
res = EEPROM_read_bit() << 7;
return res;
return EEPROM_read_bit() << 7;
}
static WRITE8_HANDLER( eeprom_w )
{
/* bit 7 is data */
@ -100,50 +127,85 @@ static WRITE8_HANDLER( eeprom_w )
EEPROM_set_clock_line((data & 0x40) ? ASSERT_LINE : CLEAR_LINE);
}
static WRITE8_HANDLER( irqack_w )
{
int bit = data & 1;
cpu_interrupt_enable(0,bit);
if (!bit)
cpunum_set_input_line(Machine, 0, 0, CLEAR_LINE );
}
static WRITE8_HANDLER( flipscreen_w )
{
flip_screen_set(data & 1);
}
static WRITE8_HANDLER( pacgal_dac_w )
{
DAC_signed_data_w(0, data);
}
/*************************************
*
* Coin counter
*
*************************************/
static WRITE8_HANDLER( coin_w )
static WRITE8_HANDLER( _20pacgal_coin_counter_w )
{
coin_counter_w(0,data & 1);
coin_counter_w(0, data & 1);
}
/*************************************
*
* ROM banking - FIXME
*
*************************************/
WRITE8_HANDLER( rom_bank_select_w )
{
_20pacgal_state *state = Machine->driver_data;
state->game_selected = data & 1;
if (state->game_selected == 0)
memcpy(memory_region(REGION_CPU1)+0x48000, memory_region(REGION_CPU1)+0x8000, 0x2000);
}
WRITE8_HANDLER( rom_48000_w )
{
_20pacgal_state *state = Machine->driver_data;
if (state->game_selected)
{
if (offset < 0x0800)
state->video_ram[offset & 0x07ff] = data;
memory_region(REGION_CPU1)[0x48000 + offset] = data;
}
}
/*************************************
*
* Memory handlers
*
*************************************/
static ADDRESS_MAP_START( 20pacgal_map, ADDRESS_SPACE_PROGRAM, 8 )
AM_RANGE(0x00000, 0x03fff) AM_ROM
AM_RANGE(0x08000, 0x09fff) AM_ROM
AM_RANGE(0x0a000, 0x0ffff) AM_MIRROR(0x40000) AM_ROM
AM_RANGE(0x10000, 0x3ffff) AM_ROM
AM_RANGE(0x44000, 0x447ff) AM_RAM AM_BASE(&pacgal_videoram) // mspacman tilemap
AM_RANGE(0x44000, 0x447ff) AM_RAM AM_BASE_MEMBER(_20pacgal_state, video_ram)
AM_RANGE(0x45040, 0x4505f) AM_WRITE(pacman_sound_w) AM_BASE(&namco_soundregs)
AM_RANGE(0x44800, 0x45eff) AM_RAM
AM_RANGE(0x45f00, 0x45fff) AM_WRITE(_20pacgal_wavedata_w) AM_BASE(&namco_wavedata) // sound wave data
AM_RANGE(0x46000, 0x46fff) AM_WRITE(pacgal_charram_w) AM_BASE(&pacgal_charram) // char gfx data
AM_RANGE(0x47100, 0x47100) AM_RAM // leftover from original Galaga code
AM_RANGE(0x48000, 0x49fff) AM_ROM AM_BASE(&pacgal_videoram2)
AM_RANGE(0x48000, 0x49fff) AM_WRITE(pacgal_videoram2_w) // ROM or galaga tilemap (banked)
AM_RANGE(0x4c000, 0x4dfff) AM_WRITE(pacgal_sprram_w) AM_BASE(&pacgal_sprram) // sprite gfx data
AM_RANGE(0x4e000, 0x4e17f) AM_WRITE(MWA8_RAM) AM_BASE(&spriteram) // sprite registers
AM_RANGE(0x4ff00, 0x4ffff) AM_WRITE(pacgal_lookup_w) // sprite color lookup table
AM_RANGE(0x45f00, 0x45fff) AM_WRITE(_20pacgal_wavedata_w) AM_BASE(&namco_wavedata)
AM_RANGE(0x46000, 0x46fff) AM_WRITE(MWA8_RAM) AM_BASE_MEMBER(_20pacgal_state, char_gfx_ram)
AM_RANGE(0x47100, 0x47100) AM_RAM /* leftover from original Galaga code */
AM_RANGE(0x48000, 0x49fff) AM_READWRITE(MRA8_ROM, rom_48000_w) /* this should be a mirror of 08000-09ffff */
AM_RANGE(0x4c000, 0x4dfff) AM_WRITE(MWA8_RAM) AM_BASE_MEMBER(_20pacgal_state, sprite_gfx_ram)
AM_RANGE(0x4e000, 0x4e17f) AM_WRITE(MWA8_RAM) AM_BASE_MEMBER(_20pacgal_state, sprite_ram)
AM_RANGE(0x4ff00, 0x4ffff) AM_WRITE(MWA8_RAM) AM_BASE_MEMBER(_20pacgal_state, sprite_color_lookup)
ADDRESS_MAP_END
static ADDRESS_MAP_START( 20pacgal_port, ADDRESS_SPACE_IO, 8 )
/*************************************
*
* I/O port handlers
*
*************************************/
static ADDRESS_MAP_START( 20pacgal_io_map, ADDRESS_SPACE_IO, 8 )
ADDRESS_MAP_FLAGS( AMEF_ABITS(8) )
AM_RANGE(0x00, 0x3f) AM_NOP /* Z180 internal registers */
AM_RANGE(0x40, 0x7f) AM_NOP /* Z180 internal registers */
@ -151,19 +213,25 @@ static ADDRESS_MAP_START( 20pacgal_port, ADDRESS_SPACE_IO, 8 )
AM_RANGE(0x81, 0x81) AM_READ(input_port_1_r)
AM_RANGE(0x82, 0x82) AM_READ(input_port_2_r)
AM_RANGE(0x80, 0x80) AM_WRITE(watchdog_reset_w)
AM_RANGE(0x81, 0x81) AM_WRITE(MWA8_NOP) // ??? pulsed by the timer irq
AM_RANGE(0x81, 0x81) AM_WRITE(MWA8_NOP) /* ??? pulsed by the timer irq */
AM_RANGE(0x82, 0x82) AM_WRITE(irqack_w)
AM_RANGE(0x85, 0x86) AM_WRITE(MWA8_NOP) // stars: rng seed (lo/hi)
AM_RANGE(0x85, 0x86) AM_WRITE(MWA8_NOP) /* stars: rng seed (lo/hi) */
AM_RANGE(0x87, 0x87) AM_READWRITE(eeprom_r, eeprom_w)
AM_RANGE(0x88, 0x88) AM_WRITE(pacgal_active_game_w)
AM_RANGE(0x89, 0x89) AM_WRITE(pacgal_dac_w)
AM_RANGE(0x8a, 0x8a) AM_WRITE(MWA8_NOP) // stars: bits 3-4 = active set; bit 5 = enable
AM_RANGE(0x8b, 0x8b) AM_WRITE(flipscreen_w)
AM_RANGE(0x8f, 0x8f) AM_WRITE(coin_w) // coin counter
AM_RANGE(0x88, 0x88) AM_WRITE(rom_bank_select_w)
AM_RANGE(0x89, 0x89) AM_WRITE(_20pacgal_dac_w)
AM_RANGE(0x8a, 0x8a) AM_WRITE(MWA8_NOP) /* stars: bits 3-4 = active set; bit 5 = enable */
AM_RANGE(0x8b, 0x8b) AM_WRITE(MWA8_RAM) AM_BASE_MEMBER(_20pacgal_state, flip_screen)
AM_RANGE(0x8f, 0x8f) AM_WRITE(_20pacgal_coin_counter_w)
ADDRESS_MAP_END
/*************************************
*
* Port definitions
*
*************************************/
static INPUT_PORTS_START( 20pacgal )
PORT_START
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP )
@ -180,10 +248,10 @@ static INPUT_PORTS_START( 20pacgal )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_COCKTAIL
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_COCKTAIL
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_COCKTAIL
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_START3 )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START2 )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_START4 )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_START3 ) PORT_NAME( "Right 1 Player Start" )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 ) PORT_NAME( "Left 1 Player Start" )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START2 ) PORT_NAME( "Left 2 Players Start" )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_START4 ) PORT_NAME( "Right 2 Players Start" )
PORT_START
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNKNOWN )
@ -198,65 +266,26 @@ INPUT_PORTS_END
static const gfx_layout charlayout =
{
8,8,
256,
2,
{ 0, 4 },
{ 8*8+0, 8*8+1, 8*8+2, 8*8+3, 0, 1, 2, 3 },
{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
16*8
};
static const gfx_layout spritelayout =
{
16,16,
128,
2,
{ 0, 1 },
{ 0*2, 1*2, 2*2, 3*2, 4*2, 5*2, 6*2, 7*2, 8*2, 9*2, 10*2, 11*2, 12*2, 13*2, 14*2, 15*2 },
{ 0*32, 1*32, 2*32, 3*32, 4*32, 5*32, 6*32, 7*32, 8*32, 9*32, 10*32, 11*32, 12*32, 13*32, 14*32, 15*32 },
16*32
};
static GFXDECODE_START( 20pacgal )
/* the game dynamically modifies these */
GFXDECODE_ENTRY( 0, 0, charlayout, 0, 64 )
GFXDECODE_ENTRY( 0, 0, spritelayout, 0, 64 )
GFXDECODE_END
static const struct namco_interface namco_interface =
{
3, /* number of voices */
-1, /* memory region */
};
/*************************************
*
* Machine driver
*
*************************************/
static MACHINE_DRIVER_START( 20pacgal )
MDRV_DRIVER_DATA(_20pacgal_state)
/* basic machine hardware */
MDRV_CPU_ADD(Z180,20000000) /* 20MHz ??? Needs to be verified! */
MDRV_CPU_PROGRAM_MAP(20pacgal_map,0)
MDRV_CPU_IO_MAP(20pacgal_port,0)
MDRV_CPU_IO_MAP(20pacgal_io_map,0)
MDRV_CPU_VBLANK_INT(irq0_line_assert,1)
MDRV_SCREEN_REFRESH_RATE(60)
MDRV_SCREEN_VBLANK_TIME(DEFAULT_60HZ_VBLANK_DURATION)
MDRV_NVRAM_HANDLER(eeprom)
/* video hardware */
MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
MDRV_SCREEN_SIZE(36*8, 28*8)
MDRV_SCREEN_VISIBLE_AREA(0*8, 36*8-1, 0*8, 28*8-1)
MDRV_GFXDECODE(20pacgal)
MDRV_PALETTE_LENGTH(0x1000)
MDRV_COLORTABLE_LENGTH(0x100)
MDRV_PALETTE_INIT(20pacgal)
MDRV_VIDEO_START(20pacgal)
MDRV_VIDEO_UPDATE(20pacgal)
MDRV_IMPORT_FROM(20pacgal_video)
/* sound hardware */
MDRV_SPEAKER_STANDARD_MONO("mono")
@ -271,14 +300,14 @@ MACHINE_DRIVER_END
/***************************************************************************
Game driver(s)
***************************************************************************/
/*************************************
*
* ROM definition
*
*************************************/
ROM_START( 20pacgal )
ROM_REGION( 0x100000, REGION_CPU1, 0 ) /* 1024k for Z180 address space */
ROM_REGION( 0x100000, REGION_CPU1, 0 )
ROM_LOAD( "20th_101.u13", 0x00000, 0x40000, CRC(77159582) SHA1(c05e005a941cbdc806dcd76b315069362c792a72) )
ROM_REGION( 0x8000, REGION_PROMS, 0 ) /* palette */
@ -287,4 +316,10 @@ ROM_END
/*************************************
*
* Game driver
*
*************************************/
GAME( 2000, 20pacgal, 0, 20pacgal, 20pacgal, 0, ROT90, "Namco", "Ms. Pac-Man/Galaga - 20 Year Reunion", GAME_IMPERFECT_GRAPHICS )

29
src/mame/includes/20pacgal.h Normal file
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@ -0,0 +1,29 @@
/***************************************************************************
Ms.Pac-Man/Galaga - 20 Year Reunion hardware
driver by Nicola Salmoria
***************************************************************************/
typedef struct __20pacgal_state _20pacgal_state;
struct __20pacgal_state
{
/* memory pointers */
UINT8 *char_gfx_ram;
UINT8 *sprite_gfx_ram;
UINT8 *video_ram;
UINT8 *sprite_ram;
UINT8 *sprite_color_lookup;
UINT8 *flip_screen;
/* machine state */
UINT8 game_selected; /* 0 = Ms. Pac-Man, 1 = Galaga */
};
/*----------- defined in video/20pacgal.c -----------*/
MACHINE_DRIVER_EXTERN( 20pacgal_video );

386
src/mame/video/20pacgal.c
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@ -1,204 +1,322 @@
/***************************************************************************
Ms.Pac-Man/Galaga - 20 Year Reunion hardware
driver by Nicola Salmoria
***************************************************************************/
#include "driver.h"
#include "deprecat.h"
#include "20pacgal.h"
#define SCREEN_HEIGHT (224)
#define SCREEN_WIDTH (288)
#define NUM_PENS (0x1000)
UINT8 *pacgal_charram,*pacgal_sprram;
UINT8 *pacgal_videoram,*pacgal_videoram2;
/*************************************
*
* Palette handling
*
*************************************/
static mame_bitmap *chr_bitmap;
static int palbank;
static int active_game;
static void switch_palette(running_machine *machine)
static void get_pens(const _20pacgal_state *state, pen_t *pens)
{
int i;
UINT8 *color_prom = memory_region(REGION_PROMS) + 0x1000 * palbank;
offs_t offs;
UINT8 *color_prom = memory_region(REGION_PROMS) + (NUM_PENS * state->game_selected);
for (i = 0;i < machine->drv->total_colors;i++)
for (offs = 0; offs < NUM_PENS ;offs++)
{
int bit0,bit1,bit2,r,g,b;
/* red component */
bit0 = (*color_prom >> 0) & 0x01;
bit1 = (*color_prom >> 1) & 0x01;
bit2 = (*color_prom >> 2) & 0x01;
r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* green component */
bit0 = (*color_prom >> 3) & 0x01;
bit1 = (*color_prom >> 4) & 0x01;
bit2 = (*color_prom >> 5) & 0x01;
g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* blue component */
bit0 = 0;
bit1 = (*color_prom >> 6) & 0x01;
bit2 = (*color_prom >> 7) & 0x01;
b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
palette_set_color(machine,i,MAKE_RGB(r,g,b));
pens[offs] = MAKE_RGB(r, g, b);
color_prom++;
}
}
PALETTE_INIT( 20pacgal )
static void do_pen_lookup(const _20pacgal_state *state, mame_bitmap *bitmap, const rectangle *cliprect)
{
palbank = 0;
switch_palette(machine);
int y, x;
pen_t pens[NUM_PENS];
get_pens(state, pens);
for (y = cliprect->min_y; y <= cliprect->max_y; y++)
for(x = cliprect->min_x; x <= cliprect->max_x; x++)
*BITMAP_ADDR32(bitmap, y, x) = pens[*BITMAP_ADDR32(bitmap, y, x)];
}
VIDEO_START( 20pacgal )
/*************************************
*
* Sprite drawing
*
*************************************/
static void draw_sprite(const _20pacgal_state *state, mame_bitmap *bitmap, int y, int x,
UINT8 code, UINT8 color, int flip_y, int flip_x)
{
chr_bitmap = auto_bitmap_alloc(machine->screen[0].width,machine->screen[0].height,machine->screen[0].format);
}
int sy;
offs_t pen_base = (color & 0x3f) << 2;
if (flip_y)
y = y + 0x0f;
WRITE8_HANDLER( pacgal_lookup_w )
{
/* palette hacks! */
((UINT16 *)Machine->game_colortable)[offset] = data & 0x0f;
((pen_t *)Machine->remapped_colortable)[offset] = Machine->pens[data & 0x0f];
}
if (flip_x)
x = x + 0x0f;
WRITE8_HANDLER( pacgal_active_game_w )
{
active_game = data & 1;
if (!active_game)
memcpy(pacgal_videoram2,memory_region(REGION_CPU1)+0x8000,0x2000);
if (palbank != active_game)
/* for each row in the sprite */
for (sy = 0; sy < 0x10; sy++)
{
palbank = active_game;
switch_palette(Machine);
int x_sav = x;
if ((y >= 0) && (y < SCREEN_HEIGHT))
{
int sx;
UINT32 data;
offs_t gfx_offs = ((code & 0x7f) << 6) | (sy << 2);
/* address mangling */
gfx_offs = (gfx_offs & 0x1f83) | ((gfx_offs & 0x003c) << 1) | ((gfx_offs & 0x0040) >> 4);
data = (state->sprite_gfx_ram[gfx_offs + 0] << 24) |
(state->sprite_gfx_ram[gfx_offs + 1] << 16) |
(state->sprite_gfx_ram[gfx_offs + 2] << 8) |
(state->sprite_gfx_ram[gfx_offs + 3] << 0);
/* for each pixel in the row */
for (sx = 0; sx < 0x10; sx++)
{
if ((x >= 0) && (x < SCREEN_WIDTH))
{
offs_t pen = (data & 0xc0000000) >> 30;
UINT8 col;
col = state->sprite_color_lookup[pen_base | pen] & 0x0f;
/* pen bits A0-A3 */
if (col)
*BITMAP_ADDR32(bitmap, y, x) = (*BITMAP_ADDR32(bitmap, y, x) & 0xff0) | col;
}
/* next pixel */
if (flip_x)
x = x - 1;
else
x = x + 1;
data = data << 2;
}
}
/* next row */
if (flip_y)
y = y - 1;
else
y = y + 1;
x = x_sav;
}
}
WRITE8_HANDLER( pacgal_videoram2_w )
{
if (active_game)
pacgal_videoram2[offset] = data;
}
WRITE8_HANDLER( pacgal_charram_w )
{
pacgal_charram[offset] = data;
decodechar(Machine->gfx[0],offset/16,pacgal_charram);
}
WRITE8_HANDLER( pacgal_sprram_w )
{
offset = (offset & 0x1f83) | ((offset & 0x078) >> 1) | ((offset & 0x004) << 4);
pacgal_sprram[offset] = data;
decodechar(Machine->gfx[1],offset/64,pacgal_sprram);
}
static void draw_sprites(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect )
static void draw_sprites(const _20pacgal_state *state, mame_bitmap *bitmap)
{
int offs;
for (offs = 0x80-2;offs >= 0;offs-=2)
for (offs = 0x80 - 2; offs >= 0; offs -= 2)
{
static const int gfx_offs[2][2] =
static const int code_offs[2][2] =
{
{ 0, 1 },
{ 2, 3 }
};
int sprite = spriteram[offs + 0x000] & 0x7f;
int color = spriteram[offs + 0x001] & 0x3f;
int sx = spriteram[offs + 0x081] - 41 + 0x100*(spriteram[offs + 0x101] & 3);
int sy = 256 - spriteram[offs + 0x080] + 1;
int flipx = (spriteram[offs + 0x100] & 0x01);
int flipy = (spriteram[offs + 0x100] & 0x02) >> 1;
int sizex = (spriteram[offs + 0x100] & 0x04) >> 2;
int sizey = (spriteram[offs + 0x100] & 0x08) >> 3;
int x,y;
int x, y;
if (flip_screen)
UINT8 code = state->sprite_ram[offs + 0x000];
UINT8 color = state->sprite_ram[offs + 0x001];
int sx = state->sprite_ram[offs + 0x081] - 41 + 0x100*(state->sprite_ram[offs + 0x101] & 3);
int sy = 256 - state->sprite_ram[offs + 0x080] + 1;
int flip_x = (state->sprite_ram[offs + 0x100] & 0x01) >> 0;
int flip_y = (state->sprite_ram[offs + 0x100] & 0x02) >> 1;
int size_x = (state->sprite_ram[offs + 0x100] & 0x04) >> 2;
int size_y = (state->sprite_ram[offs + 0x100] & 0x08) >> 3;
sy = sy - (16 * size_y);
sy = (sy & 0xff) - 32; /* fix wraparound */
/* only Galaga appears to be effected by the global flip state */
if (state->game_selected && (state->flip_screen[0] & 0x01))
{
flipx ^= 1;
flipy ^= 1;
flip_x = !flip_x;
flip_y = !flip_y;
}
sy -= 16 * sizey;
sy = (sy & 0xff) - 32; // fix wraparound
for (y = 0; y <= size_y; y++)
for (x = 0; x <= size_x; x++)
draw_sprite(state, bitmap,
sy + (16 * y), sx + (16 * x),
code + code_offs[y ^ (size_y * flip_y)][x ^ (size_x * flip_x)],
color,
flip_y, flip_x);
}
}
for (y = 0;y <= sizey;y++)
/*************************************
*
* Character map drawing
*
*************************************/
static void draw_chars(const _20pacgal_state *state, mame_bitmap *bitmap)
{
offs_t offs;
int flip = state->flip_screen[0] & 0x01;
/* for each byte in the video RAM */
for (offs = 0; offs < 0x400; offs++)
{
int sy;
int y, x;
UINT8 *gfx = &state->char_gfx_ram[state->video_ram[0x0000 | offs] << 4];
UINT32 color_base = (state->video_ram[0x0400 | offs] & 0x3f) << 2;
/* map the offset to (x, y) character coordinates */
if ((offs & 0x03c0) == 0)
{
for (x = 0;x <= sizex;x++)
y = (offs & 0x1f) - 2;
x = (offs >> 5) + 34;
}
else if ((offs & 0x03c0) == 0x3c0)
{
y = (offs & 0x1f) - 2;
x = (offs >> 5) - 30;
}
else
{
y = (offs >> 5) - 2;
x = (offs & 0x1f) + 2;
}
if ((y < 0) || (y > 27)) continue;
/* conver to pixel coordinates */
y = y << 3;
x = x << 3;
if (flip)
{
y = SCREEN_HEIGHT - 1 - y;
x = SCREEN_WIDTH - 1 - x;
}
/* for each row in the character */
for (sy = 0; sy < 8; sy++)
{
int sx;
int x_sav = x;
UINT16 data = (gfx[8] << 8) | gfx[0];
/* for each pixel in the row */
for (sx = 0; sx < 8; sx++)
{
drawgfx(bitmap,machine->gfx[1],
sprite + gfx_offs[y ^ (sizey * flipy)][x ^ (sizex * flipx)],
color,
flipx,flipy,
sx + 16*x, sy + 16*y,
cliprect,TRANSPARENCY_COLOR,0);
UINT32 col = ((data & 0x8000) >> 14) | ((data & 0x0800) >> 11);
/* pen bits A4-A11 */
*BITMAP_ADDR32(bitmap, y, x) = (color_base | col) << 4;
/* next pixel */
if (flip)
x = x - 1;
else
x = x + 1;
if (sx == 0x03)
data = data << 5;
else
data = data << 1;
}
/* next row */
if (flip)
y = y - 1;
else
y = y + 1;
x = x_sav;
gfx = gfx + 1;
}
}
}
VIDEO_UPDATE( 20pacgal )
/*************************************
*
* Video update
*
*************************************/
static VIDEO_UPDATE( 20pacgal )
{
int x,y;
const _20pacgal_state *state = machine->driver_data;
for (y = 0;y < 32;y++)
{
for (x = 0;x < 32;x++)
{
int sx,sy;
if (y < 2)
{
sy = x-2;
sx = 34+y;
}
else if (y >= 30)
{
sy = x-2;
sx = y-30;
}
else
{
sy = y-2;
sx = x+2;
}
if (active_game)
{
drawgfx(chr_bitmap,machine->gfx[0],
pacgal_videoram2[y*32 + x] + 0xa00,
(pacgal_videoram2[0x400 + y*32 + x] & 0x3f) * 4,
0,0,
8*sx,8*sy,
cliprect,TRANSPARENCY_NONE_RAW,0);
}
else
{
drawgfx(chr_bitmap,machine->gfx[0],
pacgal_videoram[y*32 + x] + 0xa00,
(pacgal_videoram[0x400 + y*32 + x] & 0x3f) * 4,
0,0,
8*sx,8*sy,
cliprect,TRANSPARENCY_NONE_RAW,0);
}
}
}
fillbitmap(bitmap,0,NULL);
draw_sprites(machine,bitmap,cliprect);
copybitmap(bitmap, chr_bitmap, flip_screen, flip_screen, 0, 0, cliprect, TRANSPARENCY_BLEND_RAW, 4);
draw_chars(state, bitmap);
draw_sprites(state, bitmap);
do_pen_lookup(state, bitmap, cliprect);
return 0;
}
/*************************************
*
* Machine driver
*
*************************************/
MACHINE_DRIVER_START( 20pacgal_video )
MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER)
MDRV_VIDEO_UPDATE(20pacgal)
MDRV_SCREEN_REFRESH_RATE(60)
MDRV_SCREEN_VBLANK_TIME(DEFAULT_60HZ_VBLANK_DURATION)
MDRV_SCREEN_FORMAT(BITMAP_FORMAT_RGB32)
MDRV_SCREEN_SIZE(SCREEN_WIDTH, SCREEN_HEIGHT)
MDRV_SCREEN_VISIBLE_AREA(0, SCREEN_WIDTH - 1, 0, SCREEN_HEIGHT - 1)
MACHINE_DRIVER_END