/***************************************************************************
Midway MCR systems
***************************************************************************/
#include "emu.h"
#include "includes/mcr.h"
INT8 mcr12_sprite_xoffs;
INT8 mcr12_sprite_xoffs_flip;
static tilemap_t *bg_tilemap;
/*************************************
*
* Tilemap callbacks
*
*************************************/
/*
The 90009 board uses 1 byte per tile:
Byte 0:
pppppppp = picture index
*/
static TILE_GET_INFO( mcr_90009_get_tile_info )
{
mcr_state *state = machine.driver_data<mcr_state>();
UINT8 *videoram = state->m_videoram;
SET_TILE_INFO(0, videoram[tile_index], 0, 0);
/* sprite color base is constant 0x10 */
tileinfo->category = 1;
}
/*
The 90010 board uses 2 adjacent bytes per tile:
Byte 0:
pppppppp = picture index (low 8 bits)
Byte 1:
ss------ = sprite palette bank
---cc--- = tile palette bank
-----y-- = Y flip
------x- = X flip
-------p = picture index (high 1 bit)
*/
static TILE_GET_INFO( mcr_90010_get_tile_info )
{
mcr_state *state = machine.driver_data<mcr_state>();
UINT8 *videoram = state->m_videoram;
int data = videoram[tile_index * 2] | (videoram[tile_index * 2 + 1] << 8);
int code = data & 0x1ff;
int color = (data >> 11) & 3;
SET_TILE_INFO(0, code, color, TILE_FLIPYX((data >> 9) & 3));
/* sprite color base comes from the top 2 bits */
tileinfo->category = (data >> 14) & 3;
}
/*
The 91490 board uses 2 adjacent bytes per tile:
Byte 0:
pppppppp = picture index (low 8 bits)
Byte 1:
ss------ = sprite palette bank (can be disabled via jumpers)
--cc---- = tile palette bank
----y--- = Y flip
-----x-- = X flip
------pp = picture index (high 2 bits)
*/
static TILE_GET_INFO( mcr_91490_get_tile_info )
{
mcr_state *state = machine.driver_data<mcr_state>();
UINT8 *videoram = state->m_videoram;
int data = videoram[tile_index * 2] | (videoram[tile_index * 2 + 1] << 8);
int code = data & 0x3ff;
int color = (data >> 12) & 3;
SET_TILE_INFO(0, code, color, TILE_FLIPYX((data >> 10) & 3));
/* sprite color base might come from the top 2 bits */
tileinfo->category = (data >> 14) & 3;
}
/*************************************
*
* Common video startup/shutdown
*
*************************************/
VIDEO_START( mcr )
{
/* the tilemap callback is based on the CPU board */
switch (mcr_cpu_board)
{
case 90009:
bg_tilemap = tilemap_create(machine, mcr_90009_get_tile_info, tilemap_scan_rows, 16,16, 32,30);
break;
case 90010:
bg_tilemap = tilemap_create(machine, mcr_90010_get_tile_info, tilemap_scan_rows, 16,16, 32,30);
break;
case 91475:
bg_tilemap = tilemap_create(machine, mcr_90010_get_tile_info, tilemap_scan_rows, 16,16, 32,30);
break;
case 91490:
bg_tilemap = tilemap_create(machine, mcr_91490_get_tile_info, tilemap_scan_rows, 16,16, 32,30);
break;
default:
assert_always(0, "Unknown mcr board");
break;
}
}
/*************************************
*
* Palette RAM writes
*
*************************************/
static void mcr_set_color(running_machine &machine, int index, int data)
{
palette_set_color_rgb(machine, index, pal3bit(data >> 6), pal3bit(data >> 0), pal3bit(data >> 3));
}
static void journey_set_color(running_machine &machine, int index, int data)
{
/* 3 bits each, RGB */
int r = (data >> 6) & 7;
int g = (data >> 0) & 7;
int b = (data >> 3) & 7;
/* up to 8 bits */
r = (r << 5) | (r << 1);
g = (g << 5) | (g << 1);
b = (b << 5) | (b << 1);
/* set the BG color */
palette_set_color(machine, index, MAKE_RGB(r, g, b));
/* if this is an odd entry in the upper palette bank, the hardware */
/* hard-codes a low 1 bit -- this is used for better grayscales */
if ((index & 0x31) == 0x31)
{
r |= 0x11;
g |= 0x11;
b |= 0x11;
}
/* set the FG color */
palette_set_color(machine, index + 64, MAKE_RGB(r, g, b));
}
WRITE8_HANDLER( mcr_91490_paletteram_w )
{
space->machine().generic.paletteram.u8[offset] = data;
offset &= 0x7f;
mcr_set_color(space->machine(), (offset / 2) & 0x3f, data | ((offset & 1) << 8));
}
/*************************************
*
* Video RAM writes
*
*************************************/
WRITE8_HANDLER( mcr_90009_videoram_w )
{
mcr_state *state = space->machine().driver_data<mcr_state>();
UINT8 *videoram = state->m_videoram;
videoram[offset] = data;
tilemap_mark_tile_dirty(bg_tilemap, offset);
}
WRITE8_HANDLER( mcr_90010_videoram_w )
{
mcr_state *state = space->machine().driver_data<mcr_state>();
UINT8 *videoram = state->m_videoram;
videoram[offset] = data;
tilemap_mark_tile_dirty(bg_tilemap, offset / 2);
/* palette RAM is mapped into the upper 0x80 bytes here */
if ((offset & 0x780) == 0x780)
{
if (mcr_cpu_board != 91475)
mcr_set_color(space->machine(), (offset / 2) & 0x3f, data | ((offset & 1) << 8));
else
journey_set_color(space->machine(), (offset / 2) & 0x3f, data | ((offset & 1) << 8));
}
}
READ8_HANDLER( twotiger_videoram_r )
{
mcr_state *state = space->machine().driver_data<mcr_state>();
UINT8 *videoram = state->m_videoram;
/* Two Tigers swizzles the address bits on videoram */
int effoffs = ((offset << 1) & 0x7fe) | ((offset >> 10) & 1);
return videoram[effoffs];
}
WRITE8_HANDLER( twotiger_videoram_w )
{
mcr_state *state = space->machine().driver_data<mcr_state>();
UINT8 *videoram = state->m_videoram;
/* Two Tigers swizzles the address bits on videoram */
int effoffs = ((offset << 1) & 0x7fe) | ((offset >> 10) & 1);
videoram[effoffs] = data;
tilemap_mark_tile_dirty(bg_tilemap, effoffs / 2);
/* palette RAM is mapped into the upper 0x80 bytes here */
if ((effoffs & 0x780) == 0x780)
mcr_set_color(space->machine(), ((offset & 0x400) >> 5) | ((offset >> 1) & 0x1f), data | ((offset & 1) << 8));
}
WRITE8_HANDLER( mcr_91490_videoram_w )
{
mcr_state *state = space->machine().driver_data<mcr_state>();
UINT8 *videoram = state->m_videoram;
videoram[offset] = data;
tilemap_mark_tile_dirty(bg_tilemap, offset / 2);
}
/*************************************
*
* 91399 Video Gen sprite renderer
*
* Paired with:
* 90009 CPU -> fixed palette @ 1
* 90010 CPU -> palette specified by tiles
*
*************************************/
static void render_sprites_91399(running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect)
{
UINT8 *spriteram = machine.generic.spriteram.u8;
const gfx_element *gfx = machine.gfx[1];
int offs;
/* render the sprites into the bitmap, ORing together */
for (offs = 0; offs < machine.generic.spriteram_size; offs += 4)
{
int code, x, y, sx, sy, hflip, vflip;
/* extract the bits of information */
code = spriteram[offs + 1] & 0x3f;
hflip = (spriteram[offs + 1] & 0x40) ? 31 : 0;
vflip = (spriteram[offs + 1] & 0x80) ? 31 : 0;
sx = (spriteram[offs + 2] - 4) * 2;
sy = (240 - spriteram[offs]) * 2;
/* apply cocktail mode */
if (mcr_cocktail_flip)
{
hflip ^= 31;
vflip ^= 31;
sx = 466 - sx + mcr12_sprite_xoffs_flip;
sy = 450 - sy;
}
else
sx += mcr12_sprite_xoffs;
/* clamp within 512 */
sx &= 0x1ff;
sy &= 0x1ff;
/* loop over lines in the sprite */
for (y = 0; y < 32; y++, sy = (sy + 1) & 0x1ff)
if (sy >= cliprect->min_y && sy <= cliprect->max_y)
{
const UINT8 *src = gfx_element_get_data(gfx, code) + gfx->line_modulo * (y ^ vflip);
UINT16 *dst = BITMAP_ADDR16(bitmap, sy, 0);
UINT8 *pri = BITMAP_ADDR8(machine.priority_bitmap, sy, 0);
/* loop over columns */
for (x = 0; x < 32; x++)
{
int tx = (sx + x) & 0x1ff;
int pix = pri[tx] | src[x ^ hflip];
/* update the effective sprite pixel */
pri[tx] = pix;
/* only draw if the low 3 bits are set */
if (pix & 0x07)
dst[tx] = pix;
}
}
}
}
/*************************************
*
* 91464 Super Video Gen sprite renderer
*
* Paired with:
* 91442 CPU -> fixed palette @ 1 (upper half) or 3 (lower half)
* 91475 CPU -> palette specified by sprite board; sprites have extra implicit colors
* 91490 CPU -> palette specified by sprite board or by tiles (select via jumpers)
* 91721 CPU -> palette specified by sprite board
*
*************************************/
static void render_sprites_91464(running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect, int primask, int sprmask, int colormask)
{
UINT8 *spriteram = machine.generic.spriteram.u8;
const gfx_element *gfx = machine.gfx[1];
int offs;
/* render the sprites into the bitmap, working from topmost to bottommost */
for (offs = machine.generic.spriteram_size - 4; offs >= 0; offs -= 4)
{
int code, color, x, y, sx, sy, hflip, vflip;
/* extract the bits of information */
code = (spriteram[offs + 2] + 256 * ((spriteram[offs + 1] >> 3) & 0x01)) % gfx->total_elements;
color = (((~spriteram[offs + 1] & 3) << 4) & sprmask) | colormask;
hflip = (spriteram[offs + 1] & 0x10) ? 31 : 0;
vflip = (spriteram[offs + 1] & 0x20) ? 31 : 0;
sx = (spriteram[offs + 3] - 3) * 2;
sy = (241 - spriteram[offs]) * 2;
/* apply cocktail mode */
if (mcr_cocktail_flip)
{
hflip ^= 31;
vflip ^= 31;
sx = 480 - sx;
sy = 452 - sy;
}
/* clamp within 512 */
sx &= 0x1ff;
sy &= 0x1ff;
/* loop over lines in the sprite */
for (y = 0; y < 32; y++, sy = (sy + 1) & 0x1ff)
if (sy >= 2 && sy >= cliprect->min_y && sy <= cliprect->max_y)
{
const UINT8 *src = gfx_element_get_data(gfx, code) + gfx->line_modulo * (y ^ vflip);
UINT16 *dst = BITMAP_ADDR16(bitmap, sy, 0);
UINT8 *pri = BITMAP_ADDR8(machine.priority_bitmap, sy, 0);
/* loop over columns */
for (x = 0; x < 32; x++)
{
int tx = (sx + x) & 0x1ff;
int pix = pri[tx];
if (pix != 0xff)
{
/* compute the final value */
pix = (pix & primask) | color | src[x ^ hflip];
/* if non-zero, draw */
if (pix & 0x0f)
{
/* mark this pixel so we don't draw there again */
pri[tx] = 0xff;
/* only draw if the low 3 bits are set */
if (pix & 0x07)
dst[tx] = pix;
}
}
}
}
}
}
/*************************************
*
* Main refresh routines
*
*************************************/
SCREEN_UPDATE( mcr )
{
/* update the flip state */
tilemap_set_flip(bg_tilemap, mcr_cocktail_flip ? (TILEMAP_FLIPX | TILEMAP_FLIPY) : 0);
/* draw the background */
bitmap_fill(screen->machine().priority_bitmap, cliprect, 0);
tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0x00);
tilemap_draw(bitmap, cliprect, bg_tilemap, 1, 0x10);
tilemap_draw(bitmap, cliprect, bg_tilemap, 2, 0x20);
tilemap_draw(bitmap, cliprect, bg_tilemap, 3, 0x30);
/* update the sprites and render them */
switch (mcr_sprite_board)
{
case 91399:
render_sprites_91399(screen->machine(), bitmap, cliprect);
break;
case 91464:
if (mcr_cpu_board == 91442)
render_sprites_91464(screen->machine(), bitmap, cliprect, 0x00, 0x30, 0x00);
else if (mcr_cpu_board == 91475)
render_sprites_91464(screen->machine(), bitmap, cliprect, 0x00, 0x30, 0x40);
else if (mcr_cpu_board == 91490)
render_sprites_91464(screen->machine(), bitmap, cliprect, 0x00, 0x30, 0x00);
else if (mcr_cpu_board == 91721)
render_sprites_91464(screen->machine(), bitmap, cliprect, 0x00, 0x30, 0x00);
break;
}
return 0;
}