summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/video/playch10.cpp
blob: 80e38fe7a0729529342a9e64579021c482579bcb (plain) (blame)
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
152
153
154
// license:BSD-3-Clause
// copyright-holders:Ernesto Corvi,Brad Oliver
#include "emu.h"
#include "includes/playch10.h"
#include "video/ppu2c0x.h"

#include "screen.h"


WRITE8_MEMBER(playch10_state::playch10_videoram_w)
{
	uint8_t *videoram = m_videoram;
	if (m_pc10_sdcs)
	{
		videoram[offset] = data;
		m_bg_tilemap->mark_tile_dirty(offset / 2);
	}
}

PALETTE_INIT_MEMBER(playch10_state, playch10)
{
	const uint8_t *color_prom = memregion("proms")->base();

	for (int i = 0; i < 256; i++)
	{
		int bit0, bit1, bit2, bit3, r, g, b;

		/* red component */

		bit0 = ~(color_prom[0] >> 0) & 0x01;
		bit1 = ~(color_prom[0] >> 1) & 0x01;
		bit2 = ~(color_prom[0] >> 2) & 0x01;
		bit3 = ~(color_prom[0] >> 3) & 0x01;

		r = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;

		/* green component */
		bit0 = ~(color_prom[256] >> 0) & 0x01;
		bit1 = ~(color_prom[256] >> 1) & 0x01;
		bit2 = ~(color_prom[256] >> 2) & 0x01;
		bit3 = ~(color_prom[256] >> 3) & 0x01;

		g = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;

		/* blue component */

		bit0 = ~(color_prom[2*256] >> 0) & 0x01;
		bit1 = ~(color_prom[2*256] >> 1) & 0x01;
		bit2 = ~(color_prom[2*256] >> 2) & 0x01;
		bit3 = ~(color_prom[2*256] >> 3) & 0x01;

		b = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;

		palette.set_pen_color(i,rgb_t(r,g,b));

		color_prom++;
	}
}

WRITE_LINE_MEMBER(playch10_state::int_detect_w)
{
	if (state)
		m_pc10_int_detect = 1;
}

TILE_GET_INFO_MEMBER(playch10_state::get_bg_tile_info)
{
	uint8_t *videoram = m_videoram;
	int offs = tile_index * 2;
	int code = videoram[offs] + ((videoram[offs + 1] & 0x07) << 8);
	int color = (videoram[offs + 1] >> 3) & 0x1f;

	SET_TILE_INFO_MEMBER(0, code, color, 0);
}

void playch10_state::video_start()
{
	const uint8_t *bios = memregion("maincpu")->base();
	m_pc10_bios = (bios[3] == 0x2a) ? 1 : 2;

	m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(playch10_state::get_bg_tile_info),this), TILEMAP_SCAN_ROWS,
			8, 8, 32, 32);
}

VIDEO_START_MEMBER(playch10_state,playch10_hboard)
{
	const uint8_t *bios = memregion("maincpu")->base();
	m_pc10_bios = (bios[3] == 0x2a) ? 1 : 2;

	m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(playch10_state::get_bg_tile_info),this), TILEMAP_SCAN_ROWS,
			8, 8, 32, 32);
}

/***************************************************************************

  Display refresh

***************************************************************************/

uint32_t playch10_state::screen_update_playch10_single(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
	rectangle top_monitor = screen.visible_area();

	top_monitor.max_y = (top_monitor.max_y - top_monitor.min_y) / 2;

	if (m_pc10_dispmask_old != m_pc10_dispmask)
	{
		m_pc10_dispmask_old = m_pc10_dispmask;

		if (m_pc10_dispmask)
			m_pc10_game_mode ^= 1;
	}

	if (m_pc10_game_mode)
		/* render the ppu */
		m_ppu->render(bitmap, 0, 0, 0, 0);
	else
	{
		/* When the bios is accessing vram, the video circuitry can't access it */
		if (!m_pc10_sdcs)
			m_bg_tilemap->draw(screen, bitmap, top_monitor, 0, 0);
	}
	return 0;
}

uint32_t playch10_state::screen_update_playch10_top(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
	/* Single Monitor version */
	if (m_pc10_bios != 1)
		return screen_update_playch10_single(screen, bitmap, cliprect);

	if (!m_pc10_dispmask)
		/* render the ppu */
		m_ppu->render(bitmap, 0, 0, 0, 0);
	else
		bitmap.fill(0, cliprect);

	return 0;
}

uint32_t playch10_state::screen_update_playch10_bottom(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
	/* Single Monitor version */
	if (m_pc10_bios != 1)
		return screen_update_playch10_single(screen, bitmap, cliprect);

	/* When the bios is accessing vram, the video circuitry can't access it */
	if (!m_pc10_sdcs)
		m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
	else
		bitmap.fill(0, cliprect);

	return 0;
}