/*****************************************************************************
Irem M90 system. There is 1 video chip - NANAO GA-25, it produces
2 tilemaps and sprites. 16 control bytes:
0: Playfield 1 X scroll
2: Playfield 1 Y scroll
4: Playfield 2 X scroll
6: Playfield 2 Y scroll
8: Bit 0x01 - unknown (set by hasamu)
10: Playfield 1 control
Bits0x03 - Playfield 1 VRAM base
Bit 0x04 - Playfield 1 width (0 is 64 tiles, 0x4 is 128 tiles)
Bit 0x10 - Playfield 1 disable
Bit 0x20 - Playfield 1 rowscroll enable
12: Playfield 2 control
Bits0x03 - Playfield 2 VRAM base
Bit 0x04 - Playfield 2 width (0 is 64 tiles, 0x4 is 128 tiles)
Bit 0x10 - Playfield 2 disable
Bit 0x20 - Playfield 2 rowscroll enable
14: Bit 0x02 - unknown (set by hasamu)
Emulation by Bryan McPhail, mish@tendril.co.uk, thanks to Chris Hardy!
*****************************************************************************/
#include "driver.h"
static UINT16 *m90_spriteram;
UINT16 *m90_video_data;
static UINT16 m90_video_control_data[8];
static tilemap *pf1_layer,*pf2_layer,*pf1_wide_layer,*pf2_wide_layer;
INLINE void get_tile_info(running_machine *machine,tile_data *tileinfo,int tile_index,int layer,int page_mask)
{
int tile,color;
tile_index = 2*tile_index + ((m90_video_control_data[5+layer] & page_mask) * 0x2000);
tile=m90_video_data[tile_index];
color=m90_video_data[tile_index+1];
SET_TILE_INFO(
0,
tile,
color&0xf,
TILE_FLIPYX((color & 0xc0) >> 6));
tileinfo->category = (color & 0x30) ? 1 : 0;
}
static TILE_GET_INFO( get_pf1_tile_info ) { get_tile_info(machine,tileinfo,tile_index,0,0x3); }
static TILE_GET_INFO( get_pf1w_tile_info ) { get_tile_info(machine,tileinfo,tile_index,0,0x2); }
static TILE_GET_INFO( get_pf2_tile_info ) { get_tile_info(machine,tileinfo,tile_index,1,0x3); }
static TILE_GET_INFO( get_pf2w_tile_info ) { get_tile_info(machine,tileinfo,tile_index,1,0x2); }
VIDEO_START( m90 )
{
pf1_layer = tilemap_create(get_pf1_tile_info, tilemap_scan_rows,TILEMAP_TYPE_PEN,8,8,64,64);
pf1_wide_layer = tilemap_create(get_pf1w_tile_info,tilemap_scan_rows,TILEMAP_TYPE_PEN,8,8,128,64);
pf2_layer = tilemap_create(get_pf2_tile_info, tilemap_scan_rows,TILEMAP_TYPE_PEN,8,8,64,64);
pf2_wide_layer = tilemap_create(get_pf2w_tile_info,tilemap_scan_rows,TILEMAP_TYPE_PEN,8,8,128,64);
tilemap_set_transparent_pen(pf1_layer,0);
tilemap_set_transparent_pen(pf1_wide_layer,0);
state_save_register_global_array(m90_video_control_data);
}
static void draw_sprites(running_machine *machine, mame_bitmap *bitmap,const rectangle *cliprect)
{
int offs;
for (offs = 0x1f2/2;offs >= 0;offs -= 3)
{
int x,y,sprite,colour,fx,fy,y_multi,i;
sprite = m90_spriteram[offs+1];
colour = (m90_spriteram[offs+0] >> 9) & 0x0f;
y = m90_spriteram[offs+0] & 0x1ff;
x = m90_spriteram[offs+2] & 0x1ff;
x = x - 16;
y = 512 - y;
fx = (m90_spriteram[offs+2] >> 8) & 0x02;
fy = (m90_spriteram[offs+0] >> 8) & 0x80;
y_multi = 1 << ((m90_spriteram[offs+0] & 0x6000) >> 13);
y -= 16 * y_multi;
for (i = 0;i < y_multi;i++)
pdrawgfx(bitmap,machine->gfx[1],
sprite + (fy ? y_multi-1 - i : i),
colour,
fx,fy,
x,y+i*16,
cliprect,TRANSPARENCY_PEN,0,
(colour & 0x08) ? 0x00 : 0x02);
}
}
#if 0
static void bootleg_draw_sprites(running_machine *machine, mame_bitmap *bitmap,const rectangle *cliprect)
{
int offs;
for (offs = 0x0;offs <0x800-8;offs+= 8) {
int x,y,sprite,colour,fx,fy;
if (/*spriteram[offs+0]==0x78 &&*/ spriteram[offs+1]==0x7f) continue;
y=(spriteram[offs+0] | (spriteram[offs+1]<<8))&0x1ff;
x=(spriteram[offs+6] | (spriteram[offs+7]<<8))&0x1ff;
x = x - /*64 -*/ 16;
y = 256 - /*32 -*/ y;
sprite=(spriteram[offs+2] | (spriteram[offs+3]<<8));
colour=(spriteram[offs+5]>>1)&0xf;
fx=spriteram[offs+5]&1;
fy=0;//spriteram[offs+5]&2;
drawgfx(bitmap,machine->gfx[1],
sprite&0x1fff,
colour,
fx,fy,
x,y,
cliprect,TRANSPARENCY_PEN,0);
}
}
#endif
WRITE16_HANDLER( m90_video_control_w )
{
COMBINE_DATA(&m90_video_control_data[offset]);
}
static void markdirty(tilemap *tmap,int page,offs_t offset)
{
offset -= page * 0x2000;
if (offset >= 0 && offset < 0x2000)
tilemap_mark_tile_dirty(tmap,offset/2);
}
WRITE16_HANDLER( m90_video_w )
{
COMBINE_DATA(&m90_video_data[offset]);
markdirty(pf1_layer, m90_video_control_data[5] & 0x3,offset);
markdirty(pf1_wide_layer,m90_video_control_data[5] & 0x2,offset);
markdirty(pf2_layer, m90_video_control_data[6] & 0x3,offset);
markdirty(pf2_wide_layer,m90_video_control_data[6] & 0x2,offset);
}
VIDEO_UPDATE( m90 )
{
static int last_pf1,last_pf2;
int pf1_base = m90_video_control_data[5] & 0x3;
int pf2_base = m90_video_control_data[6] & 0x3;
int i,pf1_enable,pf2_enable;
if (m90_video_control_data[5]&0x10) pf1_enable=0; else pf1_enable=1;
if (m90_video_control_data[6]&0x10) pf2_enable=0; else pf2_enable=1;
// tilemap_set_enable(pf1_layer,pf1_enable);
// tilemap_set_enable(pf2_layer,pf2_enable);
// tilemap_set_enable(pf1_wide_layer,pf1_enable);
// tilemap_set_enable(pf2_wide_layer,pf2_enable);
/* Dirty tilemaps if VRAM base changes */
if (pf1_base!=last_pf1)
{
tilemap_mark_all_tiles_dirty(pf1_layer);
tilemap_mark_all_tiles_dirty(pf1_wide_layer);
}
if (pf2_base!=last_pf2)
{
tilemap_mark_all_tiles_dirty(pf2_layer);
tilemap_mark_all_tiles_dirty(pf2_wide_layer);
}
last_pf1=pf1_base;
last_pf2=pf2_base;
m90_spriteram=m90_video_data+0xee00/2;
/* Setup scrolling */
if (m90_video_control_data[5]&0x20)
{
tilemap_set_scroll_rows(pf1_layer,512);
tilemap_set_scroll_rows(pf1_wide_layer,512);
for (i=0; i<512; i++)
tilemap_set_scrollx( pf1_layer,i, m90_video_data[0xf000/2+i]+2);
for (i=0; i<512; i++)
tilemap_set_scrollx( pf1_wide_layer,i, m90_video_data[0xf000/2+i]+256+2);
}
else
{
tilemap_set_scroll_rows(pf1_layer,1);
tilemap_set_scroll_rows(pf1_wide_layer,1);
tilemap_set_scrollx( pf1_layer,0, m90_video_control_data[1]+2);
tilemap_set_scrollx( pf1_wide_layer,0, m90_video_control_data[1]+256+2);
}
/* Setup scrolling */
if (m90_video_control_data[6]&0x20) {
tilemap_set_scroll_rows(pf2_layer,512);
tilemap_set_scroll_rows(pf2_wide_layer,512);
for (i=0; i<512; i++)
tilemap_set_scrollx( pf2_layer,i, m90_video_data[0xf400/2+i]-2);
for (i=0; i<512; i++)
tilemap_set_scrollx( pf2_wide_layer,i, m90_video_data[0xf400/2+i]+256-2);
} else {
tilemap_set_scroll_rows(pf2_layer,1);
tilemap_set_scroll_rows(pf2_wide_layer,1);
tilemap_set_scrollx( pf2_layer,0, m90_video_control_data[3]-2);
tilemap_set_scrollx( pf2_wide_layer,0, m90_video_control_data[3]+256-2 );
}
tilemap_set_scrolly( pf1_layer,0, m90_video_control_data[0] );
tilemap_set_scrolly( pf2_layer,0, m90_video_control_data[2] );
tilemap_set_scrolly( pf1_wide_layer,0, m90_video_control_data[0] );
tilemap_set_scrolly( pf2_wide_layer,0, m90_video_control_data[2] );
fillbitmap(priority_bitmap,0,cliprect);
if (!pf2_enable)
fillbitmap(bitmap,machine->pens[0],cliprect);
if (pf2_enable)
{
if (m90_video_control_data[6] & 0x4)
tilemap_draw(bitmap,cliprect,pf2_wide_layer,0,0);
else
tilemap_draw(bitmap,cliprect,pf2_layer,0,0);
if (m90_video_control_data[6] & 0x4)
tilemap_draw(bitmap,cliprect,pf2_wide_layer,1,1);
else
tilemap_draw(bitmap,cliprect,pf2_layer,1,1);
}
if (pf1_enable)
{
if (m90_video_control_data[5] & 0x4)
tilemap_draw(bitmap,cliprect,pf1_wide_layer,0,0);
else
tilemap_draw(bitmap,cliprect,pf1_layer,0,0);
if (m90_video_control_data[5] & 0x4)
tilemap_draw(bitmap,cliprect,pf1_wide_layer,1,1);
else
tilemap_draw(bitmap,cliprect,pf1_layer,1,1);
}
draw_sprites(machine,bitmap,cliprect);
return 0;
}