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
|
// license:BSD-3-Clause
// copyright-holders:David Haywood, Nicola Salmoria
#include "emu.h"
#include "includes/usgames.h"
PALETTE_INIT_MEMBER(usgames_state, usgames)
{
int j;
for (j = 0; j < 0x200; j++)
{
int data;
int r, g, b, i;
if (j & 0x01)
data = (j >> 5) & 0x0f;
else
data = (j >> 1) & 0x0f;
r = (data & 1) >> 0;
g = (data & 2) >> 1;
b = (data & 4) >> 2;
i = (data & 8) >> 3;
r = 0xff * r;
g = 0x7f * g * (i + 1);
b = 0x7f * b * (i + 1);
palette.set_pen_color(j,rgb_t(r, g, b));
}
}
TILE_GET_INFO_MEMBER(usgames_state::get_tile_info)
{
int tileno = m_videoram[tile_index*2];
int colour = m_videoram[tile_index*2+1];
SET_TILE_INFO_MEMBER(0,tileno,colour,0);
}
void usgames_state::video_start()
{
m_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(usgames_state::get_tile_info),this),TILEMAP_SCAN_ROWS, 8, 8,64,32);
m_gfxdecode->gfx(0)->set_source(m_charram);
}
WRITE8_MEMBER(usgames_state::videoram_w)
{
m_videoram[offset] = data;
m_tilemap->mark_tile_dirty(offset/2);
}
WRITE8_MEMBER(usgames_state::charram_w)
{
m_charram[offset] = data;
m_gfxdecode->gfx(0)->mark_dirty(offset/8);
}
uint32_t usgames_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_tilemap->draw(screen, bitmap, cliprect, 0,0);
return 0;
}
|