summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/drivers/esprit.cpp
blob: 610c0fca646789d0e3561bf20276697a8c06fb4c (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
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
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
// license:BSD-3-Clause
// copyright-holders:
/***********************************************************************************************************************************

2017-11-02 Skeleton

Hazeltine Esprit terminals.

Espirit: R6502P, R6531, HD46505RP, MC6850P, 16.5888

Espirit3: 2x R6551AP, HD46850P (6850), R6502BP, R6545-1AP, R6522AP, RO-3-9333B, 1.8432, 17.9712


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

#include "emu.h"
#include "cpu/m6502/m6502.h"
#include "machine/input_merger.h"
#include "machine/6850acia.h"
#include "machine/6522via.h"
#include "machine/mos6551.h"
#include "video/mc6845.h"
#include "emupal.h"
#include "screen.h"

class esprit_state : public driver_device
{
public:
	esprit_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag)
		, m_maincpu(*this, "maincpu")
		, m_p_chargen(*this, "chargen")
		, m_p_videoram(*this, "videoram")
		, m_palette(*this, "palette")
	{ }

	void esprit(machine_config &config);
	void esprit3(machine_config &config);

	void init_init();

private:
	MC6845_UPDATE_ROW(crtc_update_row);
	MC6845_ON_UPDATE_ADDR_CHANGED(crtc_update_addr);

	void mem3_map(address_map &map);
	void mem_map(address_map &map);

	required_device<cpu_device> m_maincpu;
	required_region_ptr<u8> m_p_chargen;
	required_shared_ptr<u8> m_p_videoram;
	optional_device<palette_device> m_palette;
};

void esprit_state::mem_map(address_map &map)
{
	map.global_mask(0x7fff);
	map(0x0058, 0x0058).rw("crtc", FUNC(mc6845_device::status_r), FUNC(mc6845_device::address_w));
	map(0x0059, 0x0059).rw("crtc", FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w));
	map(0x0078, 0x0079).rw("acia", FUNC(acia6850_device::read), FUNC(acia6850_device::write));
	map(0x0080, 0x00ff).mirror(0x100).ram();
	//map(0x0780, 0x078e).rw("rrioc", FUNC(r6531_device::io_r), FUNC(r6531_device::io_w));
	map(0x2000, 0x27ff).ram().share("videoram");
	map(0x7000, 0x7fff).rom().region("roms", 0);
}

void esprit_state::mem3_map(address_map &map)
{
	map(0x0000, 0x202f).ram();
	map(0x2030, 0x3fff).ram().share("videoram"); // it might start at 3000
	map(0x81c0, 0x81c0).rw("crtc", FUNC(r6545_1_device::status_r), FUNC(r6545_1_device::address_w));
	map(0x81c1, 0x81c1).rw("crtc", FUNC(r6545_1_device::register_r), FUNC(r6545_1_device::register_w));
	map(0x93c0, 0x93c1).rw("acia", FUNC(acia6850_device::read), FUNC(acia6850_device::write));
	map(0x95c0, 0x95c3).rw("acia1", FUNC(mos6551_device::read), FUNC(mos6551_device::write));
	map(0x99c0, 0x99c3).rw("acia2", FUNC(mos6551_device::read), FUNC(mos6551_device::write));
	map(0xb1c0, 0xb1cf).m("via", FUNC(via6522_device::map));
	map(0xe000, 0xffff).rom().region("roms", 0);
}

static INPUT_PORTS_START( esprit )
INPUT_PORTS_END

MC6845_UPDATE_ROW(esprit_state::crtc_update_row)
{
	const rgb_t *pens = m_palette->palette()->entry_list_raw();
	uint32_t *p = &bitmap.pix32(y);

	for (uint16_t x = 0; x < x_count; x++)
	{
		uint16_t mem = (ma + x) & 0x7ff;
		uint8_t chr = m_p_videoram[mem];

		/* get pattern of pixels for that character scanline */
		uint16_t gfx = m_p_chargen[(chr<<4) | ra] ^ ((x == cursor_x) ? 0x1ff : 0);

		/* Display a scanline of a character (9 pixels) */
		*p++ = pens[BIT(gfx, 8)];
		*p++ = pens[BIT(gfx, 7)];
		*p++ = pens[BIT(gfx, 6)];
		*p++ = pens[BIT(gfx, 5)];
		*p++ = pens[BIT(gfx, 4)];
		*p++ = pens[BIT(gfx, 3)];
		*p++ = pens[BIT(gfx, 2)];
		*p++ = pens[BIT(gfx, 1)];
		*p++ = pens[BIT(gfx, 0)];
	}
}

MC6845_ON_UPDATE_ADDR_CHANGED(esprit_state::crtc_update_addr)
{
}

/* F4 Character Displayer */
static const gfx_layout esprit_charlayout =
{
	8, 12,                  /* 8 x 12 characters */
	256,                    /* 256 characters */
	1,                  /* 1 bits per pixel */
	{ 0 },                  /* no bitplanes */
	/* x offsets */
	{ 0, 1, 2, 3, 4, 5, 6, 7 },
	/* y offsets */
	{ 0, 8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8, 11*8 },
	8*16                    /* every char takes 16 bytes */
};

static GFXDECODE_START( gfx_esprit )
	GFXDECODE_ENTRY( "chargen", 0x0000, esprit_charlayout, 0, 1 )
GFXDECODE_END

void esprit_state::init_init()
{
	// chargen is incomplete, copy the first half into the vacant second half
	for (u16 i = 0; i < 0x800; i++)
		m_p_chargen[0x800 | i] = m_p_chargen[i];
}


void esprit_state::esprit(machine_config &config)
{
	M6502(config, m_maincpu, 16.5888_MHz_XTAL / 18); // divider guessed
	m_maincpu->set_addrmap(AS_PROGRAM, &esprit_state::mem_map);

	//R6531(config, "rrioc", 16.5888_MHz_XTAL / 18);

	acia6850_device &acia(ACIA6850(config, "acia"));
	acia.irq_handler().set_inputline(m_maincpu, m6502_device::NMI_LINE);

	/* video hardware */
	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
	screen.set_color(rgb_t::green());
	screen.set_raw(16.5888_MHz_XTAL, 900, 0, 720, 307, 0, 288);
	screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update));

	GFXDECODE(config, "gfxdecode", m_palette, gfx_esprit);
	PALETTE(config, m_palette, palette_device::MONOCHROME);

	/* Devices */
	mc6845_device &crtc(MC6845(config, "crtc", 16.5888_MHz_XTAL / 9));
	crtc.set_screen("screen");
	crtc.set_show_border_area(false);
	crtc.set_char_width(9);
	crtc.set_update_row_callback(FUNC(esprit_state::crtc_update_row));
}

void esprit_state::esprit3(machine_config &config)
{
	M6502(config, m_maincpu, 17.9712_MHz_XTAL / 18); // divider guessed
	m_maincpu->set_addrmap(AS_PROGRAM, &esprit_state::mem3_map);

	INPUT_MERGER_ANY_HIGH(config, "mainirq").output_handler().set_inputline(m_maincpu, m6502_device::IRQ_LINE);

	acia6850_device &acia(ACIA6850(config, "acia"));
	acia.irq_handler().set("mainirq", FUNC(input_merger_device::in_w<2>));

	mos6551_device &acia1(MOS6551(config, "acia1", 17.9712_MHz_XTAL / 18));
	acia1.set_xtal(1.8432_MHz_XTAL);
	acia1.irq_handler().set("mainirq", FUNC(input_merger_device::in_w<0>));

	mos6551_device &acia2(MOS6551(config, "acia2", 17.9712_MHz_XTAL / 18));
	acia2.set_xtal(1.8432_MHz_XTAL);
	acia2.irq_handler().set("mainirq", FUNC(input_merger_device::in_w<1>));

	via6522_device &via(VIA6522(config, "via", 17.9712_MHz_XTAL / 18));
	via.irq_handler().set_inputline(m_maincpu, m6502_device::NMI_LINE);
	via.writepb_handler().set("acia", FUNC(acia6850_device::write_rxc)).bit(7);
	via.writepb_handler().append("acia", FUNC(acia6850_device::write_txc)).bit(7);

	/* video hardware */
	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
	screen.set_color(rgb_t::green());
	screen.set_raw(17.9712_MHz_XTAL, 936, 0, 720, 320, 0, 288);
	screen.set_screen_update("crtc", FUNC(r6545_1_device::screen_update));

	GFXDECODE(config, "gfxdecode", m_palette, gfx_esprit);
	PALETTE(config, m_palette, palette_device::MONOCHROME);

	r6545_1_device &crtc(R6545_1(config, "crtc", 17.9712_MHz_XTAL / 9));
	crtc.set_screen("screen");
	crtc.set_show_border_area(false);
	crtc.set_char_width(9);
	crtc.set_update_row_callback(FUNC(esprit_state::crtc_update_row));
	crtc.set_on_update_addr_change_callback(FUNC(esprit_state::crtc_update_addr));
	crtc.out_hsync_callback().set("via", FUNC(via6522_device::write_pb6)).invert();
}

ROM_START( esprit )
	// Esprit
	ROM_REGION( 0x1000, "roms", 0 )
	ROM_LOAD( "hazeltine_esprit.u19",    0x0000, 0x1000, CRC(6fdec792) SHA1(a1d1d68c8793e7e15ab5cd17682c299dff3985cb) )
	ROM_REGION( 0x1000, "chargen", ROMREGION_INVERT )
	ROM_LOAD( "hazeltine_esprit.u26",    0x0000, 0x0804, CRC(93f45f13) SHA1(1f493b44124c348759469e24fdfa8b7c52fe6fac) )
	ROM_REGION( 0x0800, "rrioc", 0 )
	ROM_LOAD( "r3198-11.u20",            0x0000, 0x0800, NO_DUMP ) // internal ROM apparently unused
ROM_END

ROM_START( esprit3 )
	// Esprit III
	ROM_REGION( 0x10000, "roms", 0 )
	ROM_LOAD( "hazeltine_espritiii.u5",  0x0000, 0x2000, CRC(fd63dad1) SHA1(b2a3e7db8480b28cab2b2834ad89fb6257f13cba) )
	ROM_REGION( 0x1000, "chargen", 0 )
	ROM_LOAD( "hazeltine_espritiii.u19", 0x0000, 0x1000, CRC(33e4a8ef) SHA1(e19c84a3c5f94812928ea84bab3ede7970dd5e72) )
ROM_END

COMP( 1981, esprit,  0,      0, esprit,  esprit, esprit_state, init_init,  "Hazeltine", "Esprit",     MACHINE_IS_SKELETON )
COMP( 1981, esprit3, esprit, 0, esprit3, esprit, esprit_state, empty_init, "Hazeltine", "Esprit III", MACHINE_IS_SKELETON )