/
freeway.cpp
202 lines (157 loc) · 6.78 KB
/
freeway.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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
// license:BSD-3-Clause
// copyright-holders:AJR
/*********************************************************************
FreeWay (c) 1999 NVC Electronica Ltd.
Skeleton driver.
*********************************************************************/
#include "emu.h"
#include "bus/rs232/rs232.h"
#include "cpu/i86/i86.h"
#include "machine/ins8250.h"
#include "machine/pit8253.h"
#include "machine/pic8259.h"
#include "machine/timekpr.h"
#include "video/mc6845.h"
#include "emupal.h"
#include "screen.h"
namespace {
class freeway_state : public driver_device
{
public:
freeway_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_pic(*this, "pic")
, m_charram(*this, "charram")
, m_colorram(*this, "colorram")
, m_lamps(*this, "lamp%u", 1U)
{
}
void freeway(machine_config &config);
void nmi_w(int state);
protected:
virtual void machine_start() override;
private:
MC6845_UPDATE_ROW(update_row);
void lamps_w(u8 data);
void mem_map(address_map &map);
void io_map(address_map &map);
required_device<cpu_device> m_maincpu;
required_device<pic8259_device> m_pic;
required_shared_ptr<u8> m_charram;
required_shared_ptr<u8> m_colorram;
output_finder<3> m_lamps;
};
void freeway_state::machine_start()
{
m_lamps.resolve();
}
MC6845_UPDATE_ROW(freeway_state::update_row)
{
}
void freeway_state::lamps_w(u8 data)
{
for (int n = 0; n < 3; n++)
m_lamps[n] = BIT(data, n);
}
void freeway_state::nmi_w(int state)
{
m_maincpu->set_input_line(INPUT_LINE_NMI, state);
}
void freeway_state::mem_map(address_map &map)
{
map(0x00000, 0x07fff).ram();
map(0x08000, 0x09fff).rw("timekpr", FUNC(timekeeper_device::read), FUNC(timekeeper_device::write));
map(0xa0000, 0xa0fff).ram().share("charram");
map(0xa4000, 0xa4fff).ram().share("colorram");
map(0xf0000, 0xfffff).rom().region("program", 0);
}
void freeway_state::io_map(address_map &map)
{
map(0x0020, 0x0021).rw(m_pic, FUNC(pic8259_device::read), FUNC(pic8259_device::write));
map(0x0030, 0x0033).w("pit", FUNC(pit8254_device::write));
map(0x0040, 0x0047).rw("uart", FUNC(ns16450_device::ins8250_r), FUNC(ns16450_device::ins8250_w));
map(0x00a3, 0x00a3).w(FUNC(freeway_state::lamps_w));
map(0x00d0, 0x00d0).portr("CONFIG");
map(0x03d0, 0x03d0).w("crtc", FUNC(mc6845_device::address_w));
map(0x03d1, 0x03d1).w("crtc", FUNC(mc6845_device::register_w));
}
static INPUT_PORTS_START(freeway)
PORT_START("CONFIG")
PORT_DIPNAME(0x01, 0x00, "Screen Format")
PORT_DIPSETTING(0x00, "PAL")
PORT_DIPSETTING(0x01, "NTSC?") // 268 lines total, 58.3 Hz refresh
PORT_BIT(0x08, 0x08, IPT_UNKNOWN)
PORT_BIT(0xf6, 0xf6, IPT_UNKNOWN) // probably unused
PORT_START("RESET")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_MEMORY_RESET) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, freeway_state, nmi_w)
INPUT_PORTS_END
static GFXDECODE_START(gfx_freeway)
GFXDECODE_ENTRY("gfx", 0, gfx_8x8x3_planar, 0x0, 1)
GFXDECODE_END
void freeway_state::freeway(machine_config &config)
{
I8088(config, m_maincpu, 10_MHz_XTAL / 2); // divider unknown
m_maincpu->set_addrmap(AS_PROGRAM, &freeway_state::mem_map);
m_maincpu->set_addrmap(AS_IO, &freeway_state::io_map);
m_maincpu->set_irq_acknowledge_callback("pic", FUNC(pic8259_device::inta_cb));
PIC8259(config, m_pic);
m_pic->out_int_callback().set_inputline(m_maincpu, 0);
pit8254_device &pit(PIT8254(config, "pit"));
pit.out_handler<0>().set(m_pic, FUNC(pic8259_device::ir0_w));
M48T58(config, "timekpr");
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_raw(10_MHz_XTAL / 2, 320, 0, 256, 312, 0, 256);
screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update));
PALETTE(config, "palette").set_entries(0x10);
GFXDECODE(config, "gfxdecode", "palette", gfx_freeway);
mc6845_device &crtc(MC6845(config, "crtc", 10_MHz_XTAL / 16));
crtc.set_char_width(8);
crtc.set_show_border_area(false);
crtc.set_screen("screen");
crtc.set_update_row_callback(FUNC(freeway_state::update_row));
crtc.out_hsync_callback().set("pit", FUNC(pit8254_device::write_clk0)); // guess
ns16450_device &uart(NS16450(config, "uart", 10_MHz_XTAL / 8)); // type unknown
uart.out_int_callback().set(m_pic, FUNC(pic8259_device::ir2_w));
uart.out_tx_callback().set("rs232", FUNC(rs232_port_device::write_txd));
uart.out_rts_callback().set("rs232", FUNC(rs232_port_device::write_rts));
uart.out_dtr_callback().set("rs232", FUNC(rs232_port_device::write_dtr));
rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, nullptr));
rs232.rxd_handler().set("uart", FUNC(ns16450_device::rx_w));
rs232.cts_handler().set("uart", FUNC(ns16450_device::cts_w));
rs232.dsr_handler().set("uart", FUNC(ns16450_device::dsr_w));
rs232.dcd_handler().set("uart", FUNC(ns16450_device::dcd_w));
}
// 8088 CPU
// Intel 8254 Programmable Interval Timer
// Intel 8259
// 2x 8k SRAM
// 1x 32k SRAM
// 6845 video chip
// 5 roms
// Oscillator 10 MHz
ROM_START(freeway)
ROM_REGION(0x10000, "program", 0)
ROM_LOAD("vip88.bin", 0x00000, 0x10000, CRC(aeba6d5e) SHA1(bb84f7040bf1b6976cb2c50b1ffdc59ae88df223))
ROM_REGION(0x18000, "gfx", 0)
ROM_LOAD("sb_51.bin", 0x00000, 0x8000, CRC(d25bd328) SHA1(b8c692298f6dc5fd5ae2f9e7701e14b0436a95bb)) // xxx0xxxxxxxxxxx = 0xFF
ROM_LOAD("sb_52.bin", 0x08000, 0x8000, CRC(f2b33acd) SHA1(e4786b4f00871d771aadacd9d6ec767691f4d939))
ROM_LOAD("sb_53.bin", 0x10000, 0x8000, CRC(50407ae6) SHA1(2c6c4803905bed5f27c6783f99a24f8dee62c19b))
ROM_REGION(0x8000, "cor", 0)
ROM_LOAD("sb_cor.bin", 0x0000, 0x8000, CRC(5f86a160) SHA1(f21b7e0e6a407371c252d6fde6fcb32a2682824c)) // all 0xFF fill until 0x7C00; valid data is only 4 bits wide
ROM_END
ROM_START(freewaya)
ROM_REGION(0x10000, "program", 0)
ROM_LOAD("memory_431b_eprom-512", 0x00000, 0x10000, CRC(64a23693) SHA1(ad8001c3652fb813d0f15875c7f9478fe2dd873c))
ROM_REGION(0x18000, "gfx", 0)
ROM_LOAD("rgb 1fw 256 vr 512b", 0x00000, 0x8000, CRC(b0bed9a0) SHA1(0275f1aa008963eb54f672565d3d5c1dd8c96213))
ROM_LOAD("rgb 2fw 256 vr 512b", 0x08000, 0x8000, CRC(ed1bb4d8) SHA1(78f9eced819c1fa269e685bb176671158ffcec26))
ROM_LOAD("rgb 3fw 256 vr 512b", 0x10000, 0x8000, CRC(c685c530) SHA1(deec9ce1df500f14b9ebd007d482473f97b3ecf3))
ROM_REGION(0x8000, "cor", 0)
ROM_LOAD("color_431b_eprom-256", 0x0000, 0x8000, CRC(e49fc782) SHA1(2c50cf644b7c6449880ed3d6e778ba116e123ae2)) // FIXED BITS (0000xxxx)
ROM_REGION(0x21ee, "nvram", 0)
ROM_LOAD("ram_m48t08_431", 0x0000, 0x21ee, CRC(e8fe8d9c) SHA1(bf93ead6ae0f03a646b4952cb999cf0dbc58d223)) // weird size, check when emulation is more mature
ROM_END
} // anonymous namespace
GAME(1999, freeway, 0, freeway, freeway, freeway_state, empty_init, ROT0, "NVC Electronica", "FreeWay (V5.12)", MACHINE_IS_SKELETON)
GAME(1997, freewaya, freeway, freeway, freeway, freeway_state, empty_init, ROT0, "NVC Electronica", "FreeWay (V4.31)", MACHINE_IS_SKELETON)