/
tvgame.cpp
143 lines (118 loc) · 4.11 KB
/
tvgame.cpp
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
// license:BSD-3-Clause
// copyright-holders: Robbbert
/***************************************************************************
Homebrew Z80-based TV Game computer by Mr. Isizu
http://w01.tp1.jp/~a571632211/z80tvgame/index.html
2015-06-12 Driver by Robbbert
****************************************************************************/
#include "emu.h"
#include "cpu/z80/z80.h"
#include "machine/i8255.h"
#include "sound/spkrdev.h"
#include "emupal.h"
#include "screen.h"
#include "speaker.h"
namespace {
class tvgame_state : public driver_device
{
public:
tvgame_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_speaker(*this, "speaker")
, m_p_videoram(*this, "videoram")
{ }
void tvgame(machine_config &config);
private:
void speaker_w(uint8_t data);
uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
void io_map(address_map &map);
void mem_map(address_map &map);
required_device<cpu_device> m_maincpu;
required_device<speaker_sound_device> m_speaker;
required_shared_ptr<uint8_t> m_p_videoram;
};
void tvgame_state::mem_map(address_map &map)
{
map.unmap_value_high();
map(0x0000, 0x7fff).rom();
map(0x8000, 0xbfff).ram();
map(0xc000, 0xdfff).ram().share("videoram");
}
void tvgame_state::io_map(address_map &map)
{
map.global_mask(3);
map.unmap_value_high();
map(0x0000, 0x0003).rw("ppi", FUNC(i8255_device::read), FUNC(i8255_device::write));
}
/* Input ports */
INPUT_PORTS_START( tvgame )
PORT_START("LINE0")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_4WAY
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 )
PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
INPUT_PORTS_END
void tvgame_state::speaker_w(uint8_t data)
{
m_speaker->level_w(BIT(data, 0));
}
uint32_t tvgame_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
uint16_t sy=0,ma=241;
for (uint8_t y = 0; y < 213; y++)
{
uint16_t *p = &bitmap.pix(sy++);
for (uint16_t x = ma; x < ma+27; x++)
{
uint8_t gfx = m_p_videoram[x];
/* Display a scanline of a character (8 pixels) */
*p++ = BIT(gfx, 0);
*p++ = BIT(gfx, 1);
*p++ = BIT(gfx, 2);
*p++ = BIT(gfx, 3);
*p++ = BIT(gfx, 4);
*p++ = BIT(gfx, 5);
*p++ = BIT(gfx, 6);
*p++ = BIT(gfx, 7);
}
ma+=30;
}
return 0;
}
void tvgame_state::tvgame(machine_config &config)
{
/* basic machine hardware */
Z80(config, m_maincpu, XTAL(4'000'000));
m_maincpu->set_addrmap(AS_PROGRAM, &tvgame_state::mem_map);
m_maincpu->set_addrmap(AS_IO, &tvgame_state::io_map);
/* video hardware */
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_refresh_hz(50);
screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
screen.set_screen_update(FUNC(tvgame_state::screen_update));
screen.set_size(216, 213);
screen.set_visarea(0, 215, 0, 212);
screen.set_palette("palette");
PALETTE(config, "palette", palette_device::MONOCHROME);
/* sound hardware */
SPEAKER(config, "mono").front_center();
SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 0.50);
// Devices
i8255_device &ppi(I8255(config, "ppi"));
ppi.in_pa_callback().set_ioport("LINE0");
ppi.out_pc_callback().set(FUNC(tvgame_state::speaker_w));
}
/* ROM definition */
ROM_START( tvgame )
ROM_REGION( 0x8000, "maincpu", 0 )
ROM_LOAD( "tvgame_all.ppi", 0x0000, 0x8000, CRC(b61d17bd) SHA1(bb92d6679370fc31d67cc334807d88d7288c7cfa) )
ROM_REGION(0x1000, "proms", 0)
ROM_LOAD( "video32.bin", 0x0000, 0x1000, CRC(516006e3) SHA1(942b31acccf833cd722cbcb739eb87673dc633d7) )
ROM_END
} // Anonymous namespace
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
CONS( 2011, tvgame, 0, 0, tvgame, tvgame, tvgame_state, empty_init, "Mr. Isizu", "Z80 TV Game System", MACHINE_SUPPORTS_SAVE )