1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/**************************************************************************
Air Buster
(C) 1990 Kaneko
driver by Luca Elia (l.elia@tin.it)
[Screen]
Size: 256 x 256
Colors: 256 x 3
Color Space: 32R x 32G x 32B
[Scrolling layers]
Number: 2
Size: 512 x 512
Scrolling: X,Y
Tiles Size: 16 x 16
Tiles Number: 0x1000
Colors: 256 x 2 (0-511)
Format:
Offset: 0x400 0x000
Bit: fedc---- -------- Color
----ba98 76543210 Code
[Sprites]
On Screen: 256 x 2
In ROM: 0x2000
Colors: 256 (512-767)
Format: See Below
**************************************************************************/
#include "driver.h"
#include "kan_pand.h"
UINT8 *airbustr_videoram2, *airbustr_colorram2;
//int airbustr_clear_sprites;
static tilemap *bg_tilemap, *fg_tilemap;
static mame_bitmap *sprites_bitmap;
WRITE8_HANDLER( airbustr_videoram_w )
{
videoram[offset] = data;
tilemap_mark_tile_dirty(bg_tilemap, offset);
}
WRITE8_HANDLER( airbustr_colorram_w )
{
colorram[offset] = data;
tilemap_mark_tile_dirty(bg_tilemap, offset);
}
WRITE8_HANDLER( airbustr_videoram2_w )
{
airbustr_videoram2[offset] = data;
tilemap_mark_tile_dirty(fg_tilemap, offset);
}
WRITE8_HANDLER( airbustr_colorram2_w )
{
airbustr_colorram2[offset] = data;
tilemap_mark_tile_dirty(fg_tilemap, offset);
}
/* Scroll Registers
Port:
4 Bg Y scroll, low 8 bits
6 Bg X scroll, low 8 bits
8 Fg Y scroll, low 8 bits
A Fg X scroll, low 8 bits
C 3 2 1 0 <-Bit
Bg Y Bg X Fg Y Fg X <-Scroll High Bits (complemented!)
*/
WRITE8_HANDLER( airbustr_scrollregs_w )
{
static int bg_scrollx, bg_scrolly, fg_scrollx, fg_scrolly, highbits;
switch (offset) // offset 0 <-> port 4
{
case 0x00: fg_scrolly = data; break; // low 8 bits
case 0x02: fg_scrollx = data; break;
case 0x04: bg_scrolly = data; break;
case 0x06: bg_scrollx = data; break;
case 0x08: highbits = ~data; break; // complemented high bits
default: logerror("CPU #2 - port %02X written with %02X - PC = %04X\n", offset, data, activecpu_get_pc());
}
tilemap_set_scrolly(bg_tilemap, 0, ((highbits << 5) & 0x100) + bg_scrolly);
tilemap_set_scrollx(bg_tilemap, 0, ((highbits << 6) & 0x100) + bg_scrollx);
tilemap_set_scrolly(fg_tilemap, 0, ((highbits << 7) & 0x100) + fg_scrolly);
tilemap_set_scrollx(fg_tilemap, 0, ((highbits << 8) & 0x100) + fg_scrollx);
}
static TILE_GET_INFO( get_fg_tile_info )
{
int attr = airbustr_colorram2[tile_index];
int code = airbustr_videoram2[tile_index] + ((attr & 0x0f) << 8);
int color = attr >> 4;
SET_TILE_INFO(0, code, color, 0);
}
static TILE_GET_INFO( get_bg_tile_info )
{
int attr = colorram[tile_index];
int code = videoram[tile_index] + ((attr & 0x0f) << 8);
int color = (attr >> 4) + 16;
SET_TILE_INFO(0, code, color, 0);
}
VIDEO_START( airbustr )
{
bg_tilemap = tilemap_create(get_bg_tile_info, tilemap_scan_rows,
TILEMAP_TYPE_PEN, 16, 16, 32, 32);
fg_tilemap = tilemap_create(get_fg_tile_info, tilemap_scan_rows,
TILEMAP_TYPE_PEN, 16, 16, 32, 32);
sprites_bitmap = auto_bitmap_alloc(machine->screen[0].width,machine->screen[0].height,machine->screen[0].format);
tilemap_set_transparent_pen(fg_tilemap, 0);
pandora_start(1,0,0);
tilemap_set_scrolldx(bg_tilemap, 0x094, 0x06a);
tilemap_set_scrolldy(bg_tilemap, 0x100, 0x1ff);
tilemap_set_scrolldx(fg_tilemap, 0x094, 0x06a);
tilemap_set_scrolldy(fg_tilemap, 0x100, 0x1ff);
}
VIDEO_UPDATE( airbustr )
{
tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0);
tilemap_draw(bitmap, cliprect, fg_tilemap, 0, 0);
// copy the sprite bitmap to the screen
pandora_update(machine, bitmap, cliprect);
return 0;
}
VIDEO_EOF( airbustr )
{
// update the sprite bitmap
pandora_eof(machine);
}
|