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
|
// license:BSD-3-Clause
// copyright-holders:Phil Stroffolino
/**
* @file video/djboy.cpp
*
* video hardware for DJ Boy
*/
#include "emu.h"
#include "video/kan_pand.h"
#include "includes/djboy.h"
void djboy_state::djboy_scrollx_w(uint8_t data)
{
m_scrollx = data;
}
void djboy_state::djboy_scrolly_w(uint8_t data)
{
m_scrolly = data;
}
TILE_GET_INFO_MEMBER(djboy_state::get_bg_tile_info)
{
uint8_t attr = m_videoram[tile_index + 0x800];
int code = m_videoram[tile_index] + (attr & 0xf) * 256;
int color = attr >> 4;
if (color & 8)
code |= 0x1000;
tileinfo.set(1, code, color, 0); /* no flip */
}
void djboy_state::djboy_videoram_w(offs_t offset, uint8_t data)
{
m_videoram[offset] = data;
m_background->mark_tile_dirty(offset & 0x7ff);
}
void djboy_state::video_start()
{
m_background = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(djboy_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS, 16, 16, 64, 32);
}
void djboy_state::djboy_paletteram_w(offs_t offset, uint8_t data)
{
int val;
m_paletteram[offset] = data;
offset &= ~1;
val = (m_paletteram[offset] << 8) | m_paletteram[offset + 1];
m_palette->set_pen_color(offset / 2, pal4bit(val >> 8), pal4bit(val >> 4), pal4bit(val >> 0));
}
uint32_t djboy_state::screen_update_djboy(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
/**
* xx------ msb x
* --x----- msb y
* ---x---- flipscreen?
* ----xxxx ROM bank
*/
int scroll;
scroll = m_scrollx | ((m_videoreg & 0xc0) << 2);
m_background->set_scrollx(0, scroll - 0x391);
scroll = m_scrolly | ((m_videoreg & 0x20) << 3);
m_background->set_scrolly(0, scroll);
m_background->draw(screen, bitmap, cliprect, 0, 0);
m_pandora->update(bitmap, cliprect);
return 0;
}
WRITE_LINE_MEMBER(djboy_state::screen_vblank_djboy)
{
// rising edge
if (state)
{
m_pandora->eof();
}
}
|