// license:BSD-3-Clause
// copyright-holders:Bryan McPhail
/****************************************************************************
Irem M107 video hardware, Bryan McPhail, mish@tendril.co.uk
Close to M92 hardware, but with 4 playfields, not 3.
Twice as many colours, twice as many sprites.
*****************************************************************************
Port:
0x80: pf1 Y scroll
0x82: pf1 X scroll
0x84: pf2 Y scroll
0x86: pf2 X scroll
0x88: pf3 Y scroll
0x8a: pf3 X scroll
0x8c: pf4 Y scroll
0x8e: pf4 X scroll
0x90: pf1 control
0x92: pf2 control
0x94: pf3 control
0x96: pf4 control
0x98: Priority?
0x9a:
0x9c:
0x9e: Raster interrupt value
Playfield control:
Bit 0x0f00: Playfield location in VRAM (in steps of 0x1000)
Bit 0x0080: 0 = Playfield enable, 1 = disable
Bit 0x0002: 1 = Rowselect enable, 0 = disable
Bit 0x0001: 1 = Rowscroll enable, 0 = disable
*****************************************************************************/
#include "emu.h"
#include "includes/m107.h"
/*****************************************************************************/
TILE_GET_INFO_MEMBER(m107_state::get_pf_tile_info)
{
pf_layer_info *layer = (pf_layer_info *)tilemap.user_data();
int tile, attrib;
tile_index = 2 * tile_index + layer->vram_base;
attrib = m_vram_data[tile_index + 1];
tile = m_vram_data[tile_index] + ((attrib & 0x1000) << 4);
SET_TILE_INFO_MEMBER(0,
tile,
attrib & 0x7f,
TILE_FLIPYX(attrib >> 10));
/* Priority 1 = tile appears above sprites */
tileinfo.category = (attrib >> 9) & 1;
}
/*****************************************************************************/
WRITE16_MEMBER(m107_state::vram_w)
{
int laynum;
COMBINE_DATA(&m_vram_data[offset]);
for (laynum = 0; laynum < 4; laynum++)
if ((offset & 0x6000) == m_pf_layer[laynum].vram_base)
m_pf_layer[laynum].tmap->mark_tile_dirty((offset & 0x1fff) / 2);
}
/*****************************************************************************/
WRITE16_MEMBER(m107_state::control_w)
{
uint16_t old = m_control[offset];
pf_layer_info *layer;
COMBINE_DATA(&m_control[offset]);
switch (offset*2)
{
case 0x10: /* Playfield 1 (top layer) */
case 0x12: /* Playfield 2 */
case 0x14: /* Playfield 3 */
case 0x16: /* Playfield 4 (bottom layer) */
layer = &m_pf_layer[offset - 0x08];
/* update VRAM base (bits 8-11) */
layer->vram_base = ((m_control[offset] >> 8) & 15) * 0x800;
/* update enable (bit 7) */
layer->tmap->enable((~m_control[offset] >> 7) & 1);
/* mark everything dirty of the VRAM base changes */
if ((old ^ m_control[offset]) & 0x0f00)
layer->tmap->mark_all_dirty();
if(m_control[offset] & 0xf07c)
printf("%04x %02x\n",m_control[offset],offset*2);
break;
case 0x18:
case 0x1a:
case 0x1c:
break;
case 0x1e:
m_raster_irq_position = m_control[offset] - 128;
m_upd71059c->ir2_w(0);
break;
}
}
/*****************************************************************************/
void m107_state::video_start()
{
for (int laynum = 0; laynum < 4; laynum++)
{
pf_layer_info *layer = &m_pf_layer[laynum];
/* allocate a tilemaps per layer */
layer->tmap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(m107_state::get_pf_tile_info)), TILEMAP_SCAN_ROWS, 8,8, 64,64);
/* set the user data to point to the layer */
layer->tmap->set_user_data(&m_pf_layer[laynum]);
/* set scroll offsets */
layer->tmap->set_scrolldx(-3 + 2 * laynum, -3 + 2 * laynum);
layer->tmap->set_scrolldy(-128, -128);
/* set pen 0 to transparent for all tilemaps except #4 */
if (laynum != 3)
layer->tmap->set_transparent_pen(0);
}
save_item(NAME(m_sprite_display));
save_item(NAME(m_raster_irq_position));
save_item(NAME(m_control));
for (int i = 0; i < 4; i++)
{
save_item(NAME(m_pf_layer[i].vram_base), i);
}
}
/*****************************************************************************/
void m107_state::draw_sprites(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
const uint16_t *spriteram = m_spriteram->buffer();
int offs;
const uint8_t *rom = m_sprtable_rom;
for (offs = 0;offs < 0x800;offs += 4)
{
int x,y,sprite,colour,fx,fy,y_multi,i,s_ptr,pri_mask;
pri_mask = (!(spriteram[offs+2]&0x80)) ? 2 : 0;
y=spriteram[offs+0];
x=spriteram[offs+3];
x&=0x1ff;
y&=0x1ff;
if (x==0 || y==0) continue; /* offscreen */
sprite=spriteram[offs+1]&0x7fff;
x = x - 16;
y = 384 - 16 - y;
colour=spriteram[offs+2]&0x7f;
fx=(spriteram[offs+2]>>8)&0x1;
fy=(spriteram[offs+2]>>8)&0x2;
y_multi=(spriteram[offs+0]>>11)&0x3;
if (m_spritesystem == 0)
{
y_multi=1 << y_multi; /* 1, 2, 4 or 8 */
s_ptr = 0;
if (!fy) s_ptr+=y_multi-1;
for (i=0; i<y_multi; i++)
{
m_gfxdecode->gfx(1)->prio_transpen(bitmap,cliprect,
sprite + s_ptr,
colour,
fx,fy,
x,y-i*16,
screen.priority(),pri_mask,0);
/* wrap-around y */
m_gfxdecode->gfx(1)->prio_transpen(bitmap,cliprect,
sprite + s_ptr,
colour,
fx,fy,
x,(y-i*16) - 0x200,
screen.priority(),pri_mask,0);
if (fy) s_ptr++; else s_ptr--;
}
}
else
{
int rom_offs = sprite*8;
if (!rom)
return;
if (rom[rom_offs+1] || rom[rom_offs+3] || rom[rom_offs+5] || rom[rom_offs+7])
{
while (rom_offs < m_sprtable_rom.length()) /* safety check */
{
/*
[1]
x--- ---- end of block marker
---- --x- Flip Y
---- ---x Flip X
[2]
xxxx xxxx Y offs lo byte
[3]
---- xxx- height (1/2/4/8)
---- ---x Y offs hi byte
[4]
xxxx xxxx sprite number lo byte
[5]
xxxx xxxx sprite number hi byte
[6]
xxxx xxxx X offs lo byte
[7]
---- ---x X offs hi byte
*/
int xdisp = rom[rom_offs+6]+256*rom[rom_offs+7];
int ydisp = rom[rom_offs+2]+256*rom[rom_offs+3];
int ffx=fx^(rom[rom_offs+1]&1);
int ffy=fy^(rom[rom_offs+1]&2);
sprite=rom[rom_offs+4]+256*rom[rom_offs+5];
y_multi=1<<((rom[rom_offs+3]>>1)&0x3);
if (fx) xdisp = -xdisp-16;
if (fy) ydisp = -ydisp - (16*y_multi-1);
if (!ffy) sprite+=y_multi-1;
for (i=0; i<y_multi; i++)
{
m_gfxdecode->gfx(1)->prio_transpen(bitmap,cliprect,
sprite+(ffy?i:-i),
colour,
ffx,ffy,
(x+xdisp)&0x1ff,(y-ydisp-16*i)&0x1ff,
screen.priority(),pri_mask,0);
/* wrap-around y */
m_gfxdecode->gfx(1)->prio_transpen(bitmap,cliprect,
sprite+(ffy?i:-i),
colour,
ffx,ffy,
(x+xdisp)&0x1ff,((y-ydisp-16*i)&0x1ff)-0x200,
screen.priority(),pri_mask,0);
}
if (rom[rom_offs+1]&0x80) break; /* end of block */
rom_offs += 8;
}
}
}
}
}
/*****************************************************************************/
void m107_state::update_scroll_positions()
{
int laynum;
int i;
/*
rowscroll is at 0xde000 - 0xde7ff, every layer has dedicated 0x200 bytes inside this area, enabled with bit 0 of the layer video register
rowselect is at 0xde800 - 0xdefff, every layer has dedicated 0x200 bytes inside this area, enabled with bit 1 of the layer video register
Perhaps 0xdf000 - 0xdffff and bit 2-3 are respectively colscroll and colselect?
*/
for (laynum = 0; laynum < 4; laynum++)
{
pf_layer_info *layer = &m_pf_layer[laynum];
int scrolly = m_control[0 + 2 * laynum];
int scrollx = m_control[1 + 2 * laynum];
if (m_control[0x08 + laynum] & 0x01) //used by World PK Soccer goal scrolling and Fire Barrel sea wave effect (stage 2) / canyon parallax effect (stage 6)
{
const uint16_t *scrolldata = m_vram_data + (0xe000 + 0x200 * laynum) / 2;
layer->tmap->set_scroll_rows(512);
for (i = 0; i < 512; i++)
layer->tmap->set_scrollx(i, scrolldata[((i+0xff80)-(scrolly))&0x1ff] + scrollx);
}
else
{
layer->tmap->set_scroll_rows(1);
layer->tmap->set_scrollx(0, scrollx);
}
layer->tmap->set_scrolly(0,scrolly);
}
}
/*****************************************************************************/
void m107_state::tilemap_draw(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, int laynum, int category,int opaque)
{
int line;
rectangle clip;
const rectangle &visarea = m_screen->visible_area();
clip = visarea;
if (m_control[0x08 + laynum] & 0x02)
{
for (line = cliprect.min_y; line <= cliprect.max_y;line++)
{
const uint16_t *scrolldata = m_vram_data + (0xe800 + 0x200 * laynum) / 2;
clip.min_y = clip.max_y = line;
m_pf_layer[laynum].tmap->set_scrollx(0, m_control[1 + 2 * laynum]);
m_pf_layer[laynum].tmap->set_scrolly(0, (m_control[0 + 2 * laynum] + scrolldata[line]));
m_pf_layer[laynum].tmap->draw(screen, bitmap, clip, category | opaque, category);
}
}
else
m_pf_layer[laynum].tmap->draw(screen, bitmap, cliprect, category | opaque, category);
}
void m107_state::screenrefresh(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
screen.priority().fill(0, cliprect);
if ((~m_control[0x0b] >> 7) & 1)
{
tilemap_draw(screen, bitmap, cliprect, 3, 0,0);
tilemap_draw(screen, bitmap, cliprect, 3, 1,0);
}
else
bitmap.fill(0, cliprect);
/* note: the opaque flag is used if layer 3 is disabled, noticeable in World PK Soccer title and gameplay screens */
tilemap_draw(screen, bitmap, cliprect, 2, 0,(((m_control[0x0b] >> 7) & 1) ? TILEMAP_DRAW_OPAQUE : 0));
tilemap_draw(screen, bitmap, cliprect, 1, 0,0);
tilemap_draw(screen, bitmap, cliprect, 0, 0,0);
tilemap_draw(screen, bitmap, cliprect, 2, 1,0);
tilemap_draw(screen, bitmap, cliprect, 1, 1,0);
tilemap_draw(screen, bitmap, cliprect, 0, 1,0);
if(m_sprite_display)
draw_sprites(screen, bitmap, cliprect);
/* This hardware probably has more priority values - but I haven't found
any used yet */
}
/*****************************************************************************/
WRITE16_MEMBER(m107_state::spritebuffer_w)
{
if (ACCESSING_BITS_0_7) {
/*
TODO: this register looks a lot more complex than how the game uses it. All of them seems to test various bit combinations during POST.
*/
// logerror("%s: buffered spriteram\n",m_maincpu->pc());
m_sprite_display = (!(data & 0x1000));
m_spriteram->copy();
}
}
/*****************************************************************************/
uint32_t m107_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
update_scroll_positions();
screenrefresh(screen, bitmap, cliprect);
return 0;
}