summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/includes/tx1.h
blob: 58e8a0811441ff4bed3bc3838d88e37fffe06661 (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
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
// license:BSD-3-Clause
// copyright-holders:Philip Bennett
/*************************************************************************

    TX-1/Buggy Boy hardware

*************************************************************************/
#ifndef MAME_INCLUDES_TX1_H
#define MAME_INCLUDES_TX1_H

#pragma once

#include "screen.h"


#define TX1_PIXEL_CLOCK     (XTAL(18'000'000) / 3)
#define TX1_HBSTART         256
#define TX1_HBEND           0
#define TX1_HTOTAL          384
#define TX1_VBSTART         240
#define TX1_VBEND           0
#define TX1_VTOTAL          264

/*
 * HACK! Increased VTOTAL to 'fix' a timing issue
 * that prevents one of the start countdown tones
 * from playing.
 */
#define BB_PIXEL_CLOCK      (XTAL(18'000'000) / 3)
#define BB_HBSTART          256
#define BB_HBEND            0
#define BB_HTOTAL           384
#define BB_VBSTART          240
#define BB_VBEND            0
#define BB_VTOTAL           288 + 1

#define CPU_MASTER_CLOCK    (XTAL(15'000'000))
#define BUGGYBOY_ZCLK       (CPU_MASTER_CLOCK / 2)

struct math_t
{
	uint16_t  cpulatch;
	uint16_t  promaddr;
	uint16_t  inslatch;
	uint32_t  mux;
	uint16_t  ppshift;
	uint32_t  i0ff;
	uint16_t  retval;
	uint16_t  muxlatch;   // TX-1
	int     dbgaddr;
	int     dbgpc;
};

/*
    SN74S516 16x16 Multiplier/Divider
*/
struct sn74s516_t
{
	int16_t   X;
	int16_t   Y;

	union
	{
	#ifdef LSB_FIRST
		struct { uint16_t W; int16_t Z; } as16bit;
	#else
		struct { int16_t Z; uint16_t W; } as16bit;
	#endif
		int32_t ZW32;
	} ZW;

	int     code;
	int     state;
	int     ZWfl;
};

struct vregs_t
{
	uint16_t  scol;       /* Road colours */
	uint32_t  slock;      /* Scroll lock */
	uint8_t   flags;      /* Road flags */

	uint32_t  ba_val;     /* Accumulator */
	uint32_t  ba_inc;
	uint32_t  bank_mode;

	uint16_t  h_val;      /* Accumulator */
	uint16_t  h_inc;
	uint16_t  h_init;

	uint8_t   slin_val;   /* Accumulator */
	uint8_t   slin_inc;

	/* Buggyboy only */
	uint8_t   wa8;
	uint8_t   wa4;

	uint16_t  wave_lfsr;
	uint8_t   sky;
	uint16_t  gas;
	uint8_t   shift;
};


class tx1_state : public driver_device
{
public:
	tx1_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
			m_maincpu(*this, "main_cpu"),
			m_mathcpu(*this, "math_cpu"),
			m_audiocpu(*this, "audio_cpu"),
			m_math_ram(*this, "math_ram"),
			m_vram(*this, "vram"),
			m_objram(*this, "objram"),
			m_rcram(*this, "rcram"),
			m_z80_ram(*this, "z80_ram"),
			m_char_tiles(*this, "char_tiles"),
			m_obj_tiles(*this, "obj_tiles"),
			m_road_rom(*this, "road"),
			m_obj_map(*this, "obj_map"),
			m_obj_luts(*this, "obj_luts"),
			m_proms(*this, "proms"),
			m_screen(*this, "screen") { }

	required_device<cpu_device> m_maincpu;
	required_device<cpu_device> m_mathcpu;
	required_device<cpu_device> m_audiocpu;
	required_shared_ptr<uint16_t> m_math_ram;
	required_shared_ptr<uint16_t> m_vram;
	required_shared_ptr<uint16_t> m_objram;
	required_shared_ptr<uint16_t> m_rcram;
	required_shared_ptr<uint8_t> m_z80_ram;

	required_region_ptr<uint8_t> m_char_tiles;
	required_region_ptr<uint8_t> m_obj_tiles;
	required_region_ptr<uint8_t> m_road_rom;
	required_region_ptr<uint8_t> m_obj_map;
	required_region_ptr<uint8_t> m_obj_luts;
	required_region_ptr<uint8_t> m_proms;

	required_device<screen_device> m_screen;

	emu_timer *m_interrupt_timer;

	uint8_t m_ppi_latch_a;
	uint8_t m_ppi_latch_b;
	uint32_t m_ts;


	math_t m_math;
	sn74s516_t m_sn74s516;

	vregs_t m_vregs;
	std::unique_ptr<uint8_t[]> m_chr_bmp;
	std::unique_ptr<uint8_t[]> m_obj_bmp;
	std::unique_ptr<uint8_t[]> m_rod_bmp;
	std::unique_ptr<bitmap_ind16> m_bitmap;

	bool m_needs_update;

	DECLARE_READ16_MEMBER(tx1_math_r);
	DECLARE_WRITE16_MEMBER(tx1_math_w);
	DECLARE_READ16_MEMBER(tx1_spcs_rom_r);
	DECLARE_READ16_MEMBER(tx1_spcs_ram_r);
	DECLARE_WRITE16_MEMBER(tx1_spcs_ram_w);
	DECLARE_READ16_MEMBER(buggyboy_math_r);
	DECLARE_WRITE16_MEMBER(buggyboy_math_w);
	DECLARE_READ16_MEMBER(buggyboy_spcs_rom_r);
	DECLARE_WRITE16_MEMBER(buggyboy_spcs_ram_w);
	DECLARE_READ16_MEMBER(buggyboy_spcs_ram_r);
	DECLARE_READ16_MEMBER(tx1_crtc_r);
	DECLARE_WRITE16_MEMBER(tx1_crtc_w);
	DECLARE_WRITE16_MEMBER(tx1_bankcs_w);
	DECLARE_WRITE16_MEMBER(tx1_slincs_w);
	DECLARE_WRITE16_MEMBER(tx1_slock_w);
	DECLARE_WRITE16_MEMBER(tx1_scolst_w);
	DECLARE_WRITE16_MEMBER(tx1_flgcs_w);
	DECLARE_WRITE16_MEMBER(buggyboy_gas_w);
	DECLARE_WRITE16_MEMBER(buggyboy_sky_w);
	DECLARE_WRITE16_MEMBER(buggyboy_scolst_w);
	DECLARE_WRITE16_MEMBER(z80_busreq_w);
	DECLARE_WRITE16_MEMBER(resume_math_w);
	DECLARE_WRITE16_MEMBER(halt_math_w);
	DECLARE_WRITE8_MEMBER(z80_intreq_w);
	DECLARE_READ16_MEMBER(z80_shared_r);
	DECLARE_WRITE16_MEMBER(z80_shared_w);
	DECLARE_READ16_MEMBER(dipswitches_r);
	DECLARE_WRITE8_MEMBER(ts_w);
	DECLARE_READ8_MEMBER(ts_r);
	DECLARE_WRITE8_MEMBER(tx1_ppi_latch_w);
	DECLARE_READ8_MEMBER(bb_analog_r);
	DECLARE_READ8_MEMBER(bbjr_analog_r);
	DECLARE_WRITE8_MEMBER(tx1_coin_cnt_w);
	DECLARE_WRITE8_MEMBER(bb_coin_cnt_w);
	DECLARE_READ8_MEMBER(tx1_ppi_porta_r);
	DECLARE_READ8_MEMBER(tx1_ppi_portb_r);
	DECLARE_MACHINE_RESET(tx1);
	DECLARE_VIDEO_START(tx1);
	DECLARE_PALETTE_INIT(tx1);
	DECLARE_MACHINE_RESET(buggyboy);
	DECLARE_VIDEO_START(buggyboy);
	DECLARE_PALETTE_INIT(buggyboy);
	DECLARE_VIDEO_START(buggybjr);

	void tx1_draw_char(uint8_t *bitmap);
	void tx1_draw_road_pixel(int screen, uint8_t *bmpaddr,
								uint8_t apix[3], uint8_t bpix[3], uint32_t pixnuma, uint32_t pixnumb,
								uint8_t stl, uint8_t sld, uint8_t selb,
								uint8_t bnk, uint8_t rorev, uint8_t eb, uint8_t r, uint8_t delr);
	void tx1_draw_road(uint8_t *bitmap);
	void tx1_draw_objects(uint8_t *bitmap);
	void tx1_update_layers();
	void tx1_combine_layers(bitmap_ind16 &bitmap, int screen);

	void buggyboy_draw_char(uint8_t *bitmap, bool wide);
	void buggyboy_get_roadpix(int screen, int ls161, uint8_t rva0_6, uint8_t sld, uint32_t *_rorev,
								uint8_t *rc0, uint8_t *rc1, uint8_t *rc2, uint8_t *rc3);
	void buggyboy_draw_road(uint8_t *bitmap);
	void buggybjr_draw_road(uint8_t *bitmap);
	void buggyboy_draw_objs(uint8_t *bitmap, bool wide);
	void bb_combine_layers(bitmap_ind16 &bitmap, int screen);
	void bb_update_layers();

	uint32_t screen_update_tx1_left(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	uint32_t screen_update_tx1_middle(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	uint32_t screen_update_tx1_right(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	uint32_t screen_update_buggyboy_left(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	uint32_t screen_update_buggyboy_middle(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	uint32_t screen_update_buggyboy_right(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	uint32_t screen_update_buggybjr(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	DECLARE_WRITE_LINE_MEMBER(screen_vblank_tx1);
	DECLARE_WRITE_LINE_MEMBER(screen_vblank_buggyboy);
	INTERRUPT_GEN_MEMBER(z80_irq);
	TIMER_CALLBACK_MEMBER(interrupt_callback);
	void tx1(machine_config &config);
	void buggyboy(machine_config &config);
	void buggybjr(machine_config &config);
	void buggybjr_main(address_map &map);
	void buggybjr_sound_prg(address_map &map);
	void buggyboy_main(address_map &map);
	void buggyboy_math(address_map &map);
	void buggyboy_sound_io(address_map &map);
	void buggyboy_sound_prg(address_map &map);
	void tx1_main(address_map &map);
	void tx1_math(address_map &map);
	void tx1_sound_io(address_map &map);
	void tx1_sound_prg(address_map &map);
};

#endif // MAME_INCLUDES_TX1_H