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-rw-r--r--src/mame/video/tryout.c263
1 files changed, 263 insertions, 0 deletions
diff --git a/src/mame/video/tryout.c b/src/mame/video/tryout.c
new file mode 100644
index 00000000000..315d5447079
--- /dev/null
+++ b/src/mame/video/tryout.c
@@ -0,0 +1,263 @@
+/***************************************************************
+
+ 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;
+}