/***************************************************************
Pro Yakyuu Nyuudan Test Tryout (JPN Ver.)
video hardware emulation
****************************************************************/
#include "driver.h"
static tilemap *fg_tilemap, *bg_tilemap;
static UINT8 vram_bank;
static UINT8 *tryout_vram, *tryout_vram_gfx;
UINT8 *tryout_gfx_control;
PALETTE_INIT( tryout )
{
int i;
for (i = 0;i < machine->drv->total_colors;i++)
{
int bit0,bit1,bit2,r,g,b;
/* red component */
bit0 = (color_prom[i] >> 0) & 0x01;
bit1 = (color_prom[i] >> 1) & 0x01;
bit2 = (color_prom[i] >> 2) & 0x01;
r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* green component */
bit0 = (color_prom[i] >> 3) & 0x01;
bit1 = (color_prom[i] >> 4) & 0x01;
bit2 = (color_prom[i] >> 5) & 0x01;
g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* blue component */
bit0 = 0;
bit1 = (color_prom[i] >> 6) & 0x01;
bit2 = (color_prom[i] >> 7) & 0x01;
b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
palette_set_color(machine,i,MAKE_RGB(r,g,b));
}
}
static TILE_GET_INFO( get_fg_tile_info )
{
int code, attr;
code = videoram[tile_index];
attr = videoram[tile_index + 0x400];
code |= ((attr & 0x03) << 8);
SET_TILE_INFO(0, code, 6, 0);
}
static TILE_GET_INFO( get_bg_tile_info )
{
SET_TILE_INFO(2, tryout_vram[tile_index] & 0x7f, 0, 0);
}
READ8_HANDLER( tryout_vram_r )
{
return tryout_vram[offset]; // debug only
}
WRITE8_HANDLER( tryout_videoram_w )
{
videoram[offset] = data;
tilemap_mark_tile_dirty(fg_tilemap, offset & 0x3ff);
}
WRITE8_HANDLER( tryout_vram_w )
{
/* There are eight banks of vram - in bank 0 the first 0x400 bytes
is reserved for the tilemap. In banks 2, 4 and 6 the game never
writes to the first 0x400 bytes - I suspect it's either
unused, or it actually mirrors the tilemap ram from the first bank.
The rest of the vram is tile data which has the bitplanes arranged
in a very strange format. For Mame's sake we reformat this on
the fly for easier gfx decode.
Bit 0 of the bank register seems special - it's kept low when uploading
gfx data and then set high from that point onwards.
*/
const UINT8 bank=(vram_bank>>1)&0x7;
if ((bank==0 || bank==2 || bank==4 || bank==6) && (offset&0x7ff)<0x400) {
int newoff=offset&0x3ff;
switch (newoff&0x300){
case 0x000: newoff=(newoff&0xff) | 0x100; break;
case 0x100: newoff=(newoff&0xff) | 0x200; break;
case 0x200: newoff=(newoff&0xff) | 0x000; break;
case 0x300: newoff=(newoff&0xff) | 0x300; break;
}
tryout_vram[newoff]=data;
tilemap_mark_tile_dirty(bg_tilemap,newoff);
return;
}
/*
Bit planes for tiles are arranged as follows within vram (split into high/low nibbles):
0x0400 (0) + 0x0400 (4) + 0x0800(0) - tiles 0x00 to 0x0f
0x0800 (4) + 0x0c00 (0) + 0x0c00(4) - tiles 0x10 to 0x1f
0x1400 (0) + 0x1400 (4) + 0x1800(0) - tiles 0x20 to 0x2f
0x1800 (4) + 0x1c00 (0) + 0x1c00(4) - tiles 0x30 to 0x3f
etc.
*/
offset=(offset&0x7ff) | (bank<<11);
tryout_vram[offset]=data;
switch (offset&0x1c00) {
case 0x0400:
tryout_vram_gfx[(offset&0x3ff) + 0x0000 + ((offset&0x2000)>>1)]=(data&0xf);
tryout_vram_gfx[(offset&0x3ff) + 0x2000 + ((offset&0x2000)>>1)]=(data&0xf0)>>4;
break;
case 0x0800:
tryout_vram_gfx[(offset&0x3ff) + 0x4000 + ((offset&0x2000)>>1)]=(data&0xf);
tryout_vram_gfx[(offset&0x3ff) + 0x4400 + ((offset&0x2000)>>1)]=(data&0xf0)>>4;
break;
case 0x0c00:
tryout_vram_gfx[(offset&0x3ff) + 0x0400 + ((offset&0x2000)>>1)]=(data&0xf);
tryout_vram_gfx[(offset&0x3ff) + 0x2400 + ((offset&0x2000)>>1)]=(data&0xf0)>>4;
break;
case 0x1400:
tryout_vram_gfx[(offset&0x3ff) + 0x0800 + ((offset&0x2000)>>1)]=(data&0xf);
tryout_vram_gfx[(offset&0x3ff) + 0x2800 + ((offset&0x2000)>>1)]=(data&0xf0)>>4;
break;
case 0x1800:
tryout_vram_gfx[(offset&0x3ff) + 0x4800 + ((offset&0x2000)>>1)]=(data&0xf);
tryout_vram_gfx[(offset&0x3ff) + 0x4c00 + ((offset&0x2000)>>1)]=(data&0xf0)>>4;
break;
case 0x1c00:
tryout_vram_gfx[(offset&0x3ff) + 0x0c00 + ((offset&0x2000)>>1)]=(data&0xf);
tryout_vram_gfx[(offset&0x3ff) + 0x2c00 + ((offset&0x2000)>>1)]=(data&0xf0)>>4;
break;
}
decodechar(Machine->gfx[2],(offset-0x400/64)&0x7f,tryout_vram_gfx,Machine->drv->gfxdecodeinfo[2].gfxlayout);
tilemap_mark_all_tiles_dirty(bg_tilemap);
}
WRITE8_HANDLER( tryout_vram_bankswitch_w )
{
vram_bank = data;
}
WRITE8_HANDLER( tryout_flipscreen_w )
{
flip_screen_set(data & 1);
}
static TILEMAP_MAPPER( get_fg_memory_offset )
{
return (row ^ 0x1f) + (col << 5);
}
static TILEMAP_MAPPER( get_bg_memory_offset )
{
int a;
// if (col&0x20)
// a= (7 - (row & 7)) + ((0x8 - (row & 0x8)) << 4) + ((col & 0xf) << 3) + (( ( 0x10 - (col & 0x10) ) ) << 4) + ((( (col & 0x20))) << 4);
// else
a= (7 - (row & 7)) + ((0x8 - (row & 0x8)) << 4) + ((col & 0xf) << 3) + (( ( (col & 0x10) ) ) << 4) + ((( (col & 0x20))) << 4);
// mame_printf_debug("%d %d -> %d\n",col,row, a);
return a;
}
VIDEO_START( tryout )
{
fg_tilemap = tilemap_create(get_fg_tile_info,get_fg_memory_offset,TILEMAP_TYPE_PEN,8,8,32,32);
bg_tilemap = tilemap_create(get_bg_tile_info,get_bg_memory_offset,TILEMAP_TYPE_PEN,16,16,64,16);
tryout_vram=auto_malloc(8 * 0x800);
tryout_vram_gfx=auto_malloc(0x6000);
tilemap_set_transparent_pen(fg_tilemap,0);
}
static void draw_sprites(running_machine *machine, mame_bitmap *bitmap,const rectangle *cliprect)
{
int offs,fx,fy,x,y,color,sprite,inc;
for (offs = 0;offs < 0x7f;offs += 4)
{
if (!(spriteram[offs]&1))
continue;
sprite = spriteram[offs+1] + ((spriteram_2[offs]&7)<<8);
x = spriteram[offs+3]-3;
y = spriteram[offs+2];
color = (spriteram[offs] & 8)>>3;
fx = 0;
fy = 0;
inc = 16;
if (flip_screen)
{
x = 240 - x;
fx = !fx;
y = 240 - y;
fy = !fy;
inc = -inc;
}
/* Double Height */
if(spriteram[offs] & 0x10)
{
drawgfx(bitmap,machine->gfx[1],
sprite,
color,fx,fy,x,y + inc,
cliprect,TRANSPARENCY_PEN,0);
drawgfx(bitmap,machine->gfx[1],
sprite+1,
color,fx,fy,x,y,
cliprect,TRANSPARENCY_PEN,0);
}
else
{
drawgfx(bitmap,machine->gfx[1],
sprite,
color,fx,fy,x,y,
cliprect,TRANSPARENCY_PEN,0);
}
}
}
VIDEO_UPDATE( tryout )
{
// UINT8* mem=memory_region(REGION_CPU1);
int scrollx;
if (!flip_screen)
tilemap_set_scrollx(fg_tilemap, 0, 16); /* Assumed hard-wired */
else
tilemap_set_scrollx(fg_tilemap, 0, -8); /* Assumed hard-wired */
if(tryout_gfx_control[0] == 0xc)
scrollx = tryout_gfx_control[1];
if(tryout_gfx_control[0] == 0x8 && !tryout_gfx_control[1])
scrollx = 0x100;
else
scrollx = tryout_gfx_control[1] | ((tryout_gfx_control[0]&1)<<8) | ((tryout_gfx_control[0]&4)<<7);
tilemap_set_scrollx(bg_tilemap, 0, scrollx);
tilemap_set_scrolly(bg_tilemap, 0, -tryout_gfx_control[2]);
tilemap_draw(bitmap,cliprect,bg_tilemap,0,0);
tilemap_draw(bitmap,cliprect,fg_tilemap,0,0);
draw_sprites(machine, bitmap,cliprect);
// popmessage("%02x %02x %02x - %04x",mem[0xe402],mem[0xe403],mem[0xe404], ((tryout_gfx_control[0]&1)<<8) | ((tryout_gfx_control[0]&4)<<7));
return 0;
}