/***************************************************************************
video.c
Functions to emulate the video hardware of the machine.
***************************************************************************/
#include "emu.h"
#include "video/resnet.h"
#include "includes/tagteam.h"
// TODO: fix or confirm resnet implementation
// schematics say emitter circuit with 47 ohm pullup and 470 ohm pulldown but this results in a bad palette
static const res_net_info tagteam_net_info =
{
RES_NET_VCC_5V | RES_NET_VBIAS_5V | RES_NET_VIN_TTL_OUT,
{
{ RES_NET_AMP_EMITTER, 4700, 0, 3, { 4700, 3300, 1500 } },
{ RES_NET_AMP_EMITTER, 4700, 0, 3, { 4700, 3300, 1500 } },
{ RES_NET_AMP_EMITTER, 4700, 0, 2, { 3300, 1500 } }
}
};
static const res_net_decode_info tagteam_decode_info =
{
1, /* single PROM per color */
0x000, 0x01f, /* start/end */
/* R G B */
{ 0x00, 0x00, 0x00 }, /* offsets */
{ 0x00, 0x03, 0x06 }, /* shifts */
{ 0x07, 0x07, 0x03 } /* masks */
};
PALETTE_INIT( tagteam )
{
rgb_t *rgb;
rgb = compute_res_net_all(machine, color_prom, &tagteam_decode_info, &tagteam_net_info);
palette_set_colors(machine, 0x00, rgb, 0x20);
auto_free(machine, rgb);
}
WRITE8_HANDLER( tagteam_videoram_w )
{
tagteam_state *state = space->machine().driver_data<tagteam_state>();
state->m_videoram[offset] = data;
tilemap_mark_tile_dirty(state->m_bg_tilemap, offset);
}
WRITE8_HANDLER( tagteam_colorram_w )
{
tagteam_state *state = space->machine().driver_data<tagteam_state>();
state->m_colorram[offset] = data;
tilemap_mark_tile_dirty(state->m_bg_tilemap, offset);
}
READ8_HANDLER( tagteam_mirrorvideoram_r )
{
tagteam_state *state = space->machine().driver_data<tagteam_state>();
int x,y;
/* swap x and y coordinates */
x = offset / 32;
y = offset % 32;
offset = 32 * y + x;
return state->m_videoram[offset];
}
READ8_HANDLER( tagteam_mirrorcolorram_r )
{
tagteam_state *state = space->machine().driver_data<tagteam_state>();
int x,y;
/* swap x and y coordinates */
x = offset / 32;
y = offset % 32;
offset = 32 * y + x;
return state->m_colorram[offset];
}
WRITE8_HANDLER( tagteam_mirrorvideoram_w )
{
int x,y;
/* swap x and y coordinates */
x = offset / 32;
y = offset % 32;
offset = 32 * y + x;
tagteam_videoram_w(space,offset,data);
}
WRITE8_HANDLER( tagteam_mirrorcolorram_w )
{
int x,y;
/* swap x and y coordinates */
x = offset / 32;
y = offset % 32;
offset = 32 * y + x;
tagteam_colorram_w(space,offset,data);
}
WRITE8_HANDLER( tagteam_control_w )
{
tagteam_state *state = space->machine().driver_data<tagteam_state>();
// d0-3: color for blank screen, applies to h/v borders too
// (not implemented yet, and tagteam doesn't have a global screen on/off bit)
// d7: palette bank
state->m_palettebank = (data & 0x80) >> 7;
}
WRITE8_HANDLER( tagteam_flipscreen_w )
{
// d0: flip screen
if (flip_screen_get(space->machine()) != (data &0x01))
{
flip_screen_set(space->machine(), data & 0x01);
tilemap_mark_all_tiles_dirty_all(space->machine());
}
// d6/7: coin counters
coin_counter_w(space->machine(), 0, data & 0x80);
coin_counter_w(space->machine(), 1, data & 0x40);
}
static TILE_GET_INFO( get_bg_tile_info )
{
tagteam_state *state = machine.driver_data<tagteam_state>();
int code = state->m_videoram[tile_index] + 256 * state->m_colorram[tile_index];
int color = state->m_palettebank << 1;
SET_TILE_INFO(0, code, color, 0);
}
VIDEO_START( tagteam )
{
tagteam_state *state = machine.driver_data<tagteam_state>();
state->m_bg_tilemap = tilemap_create(machine, get_bg_tile_info, tilemap_scan_rows_flip_x,
8, 8, 32, 32);
}
static void draw_sprites(running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect)
{
tagteam_state *state = machine.driver_data<tagteam_state>();
int offs;
for (offs = 0; offs < 0x20; offs += 4)
{
int spritebank = (state->m_videoram[offs] & 0x30) << 4;
int code = state->m_videoram[offs + 1] + 256 * spritebank;
int color = state->m_palettebank << 1 | 1;
int flipx = state->m_videoram[offs] & 0x04;
int flipy = state->m_videoram[offs] & 0x02;
int sx = 240 - state->m_videoram[offs + 3];
int sy = 240 - state->m_videoram[offs + 2];
if (!(state->m_videoram[offs] & 0x01)) continue;
if (flip_screen_get(machine))
{
sx = 240 - sx;
sy = 240 - sy;
flipx = !flipx;
flipy = !flipy;
}
drawgfx_transpen(bitmap, cliprect,
machine.gfx[1],
code, color,
flipx, flipy,
sx, sy, 0);
/* Wrap around */
code = state->m_videoram[offs + 0x20] + 256 * spritebank;
color = state->m_palettebank;
sy += (flip_screen_get(machine) ? -256 : 256);
drawgfx_transpen(bitmap, cliprect,
machine.gfx[1],
code, color,
flipx, flipy,
sx, sy, 0);
}
}
SCREEN_UPDATE( tagteam )
{
tagteam_state *state = screen->machine().driver_data<tagteam_state>();
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
draw_sprites(screen->machine(), bitmap, cliprect);
return 0;
}