summaryrefslogtreecommitdiffstats
path: root/src/mame/includes/rmnimbus.h
blob: 8f5d355f13eca910e28a84d270f840a060f3ac2e (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
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
// license:BSD-3-Clause
// copyright-holders:Phill Harvey-Smith, Carl
/*
    rmnimbus.c
    Machine driver for the Research Machines Nimbus.

    Phill Harvey-Smith
    2009-11-29.
*/
#ifndef MAME_INCLUDES_RMNIMBUS_H
#define MAME_INCLUDES_RMNIMBUS_H

#pragma once

#include "cpu/i86/i186.h"
#include "cpu/mcs51/mcs51.h"
#include "machine/z80sio.h"
#include "machine/wd_fdc.h"
#include "bus/scsi/scsi.h"
#include "machine/6522via.h"
#include "machine/ram.h"
#include "machine/eepromser.h"
#include "sound/ay8910.h"
#include "sound/msm5205.h"
#include "bus/centronics/ctronics.h"
#include "emupal.h"
#include "screen.h"

#define MAINCPU_TAG "maincpu"
#define IOCPU_TAG   "iocpu"
#define Z80SIO_TAG  "z80sio"
#define FDC_TAG     "wd2793"
#define SCSIBUS_TAG "scsibus"
#define ER59256_TAG "er59256"
#define AY8910_TAG  "ay8910"
#define MONO_TAG    "mono"
#define MSM5205_TAG "msm5205"
#define VIA_TAG     "via6522"
#define CENTRONICS_TAG "centronics"

/* Mouse / Joystick */

#define JOYSTICK0_TAG           "joystick0"
#define MOUSE_BUTTON_TAG        "mousebtn"
#define MOUSEX_TAG              "mousex"
#define MOUSEY_TAG              "mousey"

/* Memory controller */
#define RAM_BANK00_TAG  "bank0"
#define RAM_BANK01_TAG  "bank1"
#define RAM_BANK02_TAG  "bank2"
#define RAM_BANK03_TAG  "bank3"
#define RAM_BANK04_TAG  "bank4"
#define RAM_BANK05_TAG  "bank5"
#define RAM_BANK06_TAG  "bank6"
#define RAM_BANK07_TAG  "bank7"

class rmnimbus_state : public driver_device
{
public:
	rmnimbus_state(const machine_config &mconfig, device_type type, const char *tag) :
		driver_device(mconfig, type, tag),
		m_maincpu(*this, MAINCPU_TAG),
		m_iocpu(*this, IOCPU_TAG),
		m_msm(*this, MSM5205_TAG),
		m_scsibus(*this, SCSIBUS_TAG),
		m_ram(*this, RAM_TAG),
		m_eeprom(*this, ER59256_TAG),
		m_via(*this, VIA_TAG),
		m_centronics(*this, CENTRONICS_TAG),
		m_palette(*this, "palette"),
		m_scsi_data_out(*this, "scsi_data_out"),
		m_scsi_data_in(*this, "scsi_data_in"),
		m_scsi_ctrl_out(*this, "scsi_ctrl_out"),
		m_fdc(*this, FDC_TAG),
		m_z80sio(*this, Z80SIO_TAG),
		m_screen(*this, "screen"),
		m_io_config(*this, "config"),
		m_io_joystick0(*this, JOYSTICK0_TAG),
		m_io_mouse_button(*this, MOUSE_BUTTON_TAG),
		m_io_mousex(*this, MOUSEX_TAG),
		m_io_mousey(*this, MOUSEY_TAG)
	{
	}

	static constexpr feature_type imperfect_features() { return feature::MOUSE; }

	void nimbus(machine_config &config);

	uint32_t m_debug_machine = 0;
	uint32_t m_debug_trap = 0;

	void decode_subbios(device_t *device, offs_t pc);
	void decode_subbios_return(device_t *device, offs_t pc);
	void decode_dos21(device_t *device, offs_t pc);

private:
	required_device<i80186_cpu_device> m_maincpu;
	required_device<i8031_device> m_iocpu;
	required_device<msm5205_device> m_msm;
	required_device<scsi_port_device> m_scsibus;
	required_device<ram_device> m_ram;
	required_device<eeprom_serial_93cxx_device> m_eeprom;
	required_device<via6522_device> m_via;
	required_device<centronics_device> m_centronics;
	required_device<palette_device> m_palette;
	required_device<output_latch_device> m_scsi_data_out;
	required_device<input_buffer_device> m_scsi_data_in;
	required_device<output_latch_device> m_scsi_ctrl_out;
	required_device<wd2793_device> m_fdc;
	required_device<z80sio_device> m_z80sio;
	required_device<screen_device> m_screen;
	required_ioport m_io_config;
	required_ioport m_io_joystick0;
	required_ioport m_io_mouse_button;
	required_ioport m_io_mousex;
	required_ioport m_io_mousey;

	bitmap_ind16 m_video_mem;

	uint8_t m_mcu_reg080 = 0;
	uint8_t m_iou_reg092 = 0;
	uint8_t m_last_playmode = 0;
	uint8_t m_ay8910_a = 0;
	uint8_t m_ay8910_b = 0;
	uint16_t m_x = 0;
	uint16_t m_y = 0;
	uint16_t m_yline = 0;
	uint8_t m_colours = 0;
	uint8_t m_mode = 0;
	uint8_t m_upmode = 0;
	uint32_t m_debug_video = 0;
	uint8_t m_vector = 0;
	uint8_t m_eeprom_bits = 0;
	uint8_t m_eeprom_state = 0;

	uint8_t nimbus_mcu_r();
	void nimbus_mcu_w(uint8_t data);
	uint8_t scsi_r(offs_t offset);
	void scsi_w(offs_t offset, uint8_t data);
	uint8_t fdc_reg_r(offs_t offset);
	void fdc_reg_w(offs_t offset, uint8_t data);
	void fdc_ctl_w(uint8_t data);
	void nimbus_voice_w(offs_t offset, uint8_t data);
	uint8_t nimbus_pc8031_r(offs_t offset);
	void nimbus_pc8031_w(offs_t offset, uint8_t data);
	uint8_t nimbus_pc8031_iou_r(offs_t offset);
	void nimbus_pc8031_iou_w(offs_t offset, uint8_t data);
	uint8_t nimbus_pc8031_port1_r();
	void nimbus_pc8031_port1_w(uint8_t data);
	uint8_t nimbus_pc8031_port3_r();
	void nimbus_pc8031_port3_w(uint8_t data);
	uint8_t nimbus_iou_r(offs_t offset);
	void nimbus_iou_w(offs_t offset, uint8_t data);

	uint8_t nimbus_rompack_r(offs_t offset);
	void nimbus_rompack_w(offs_t offset, uint8_t data);
	void nimbus_sound_ay8910_porta_w(uint8_t data);
	void nimbus_sound_ay8910_portb_w(uint8_t data);
	uint8_t nimbus_mouse_js_r();
	void nimbus_mouse_js_w(uint8_t data);
	uint16_t nimbus_video_io_r(offs_t offset, uint16_t mem_mask = ~0);
	void nimbus_video_io_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
	virtual void machine_start() override;
	virtual void machine_reset() override;
	virtual void video_start() override;
	virtual void video_reset() override;
	uint32_t screen_update_nimbus(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
	DECLARE_WRITE_LINE_MEMBER(sio_interrupt);
	DECLARE_WRITE_LINE_MEMBER(nimbus_fdc_intrq_w);
	DECLARE_WRITE_LINE_MEMBER(nimbus_fdc_drq_w);
	DECLARE_READ_LINE_MEMBER(nimbus_fdc_enmf_r);

	void nimbus_via_write_portb(uint8_t data);
	DECLARE_WRITE_LINE_MEMBER(write_scsi_bsy);
	DECLARE_WRITE_LINE_MEMBER(write_scsi_cd);
	DECLARE_WRITE_LINE_MEMBER(write_scsi_io);
	DECLARE_WRITE_LINE_MEMBER(write_scsi_msg);
	DECLARE_WRITE_LINE_MEMBER(write_scsi_req);
	DECLARE_WRITE_LINE_MEMBER(nimbus_msm5205_vck);
	DECLARE_WRITE_LINE_MEMBER(write_scsi_iena);

	uint8_t get_pixel(uint16_t x, uint16_t y);
	uint16_t read_pixel_line(uint16_t x, uint16_t y, uint8_t pixels, uint8_t bpp);
	uint16_t read_pixel_data(uint16_t x, uint16_t y);
	void set_pixel(uint16_t x, uint16_t y, uint8_t colour);
	void set_pixel40(uint16_t x, uint16_t y, uint8_t colour);
	void write_pixel_line(uint16_t x, uint16_t y, uint16_t, uint8_t pixels, uint8_t bpp);
	void move_pixel_line(uint16_t x, uint16_t y, uint8_t width);
	void write_pixel_data(uint16_t x, uint16_t y, uint16_t data);
	void change_palette(uint8_t bank, uint16_t colours);
	void external_int(uint8_t vector, bool state);
	uint8_t cascade_callback();
	void nimbus_bank_memory();
	void memory_reset();
	void fdc_reset();
	uint8_t fdc_driveno(uint8_t drivesel);
	void hdc_reset();
	void hdc_post_rw();
	void hdc_drq(bool state);
	void pc8031_reset();
	//void ipc_dumpregs();
	void iou_reset();
	void rmni_sound_reset();
	void mouse_js_reset();
	void check_scsi_irq();
	void set_scsi_drqlat(bool   clock, bool clear);

	int m_scsi_iena = 0;
	int m_scsi_msg = 0;
	int m_scsi_bsy = 0;
	int m_scsi_io = 0;
	int m_scsi_cd = 0;
	int m_scsi_req = 0;
	int m_scsi_reqlat = 0;

	// Static data related to Floppy and SCSI hard disks
	struct
	{
		uint8_t reg400 = 0;
	} m_nimbus_drives;

	/* 8031 Peripheral controller */
	struct
	{
		uint8_t ipc_in = 0;
		uint8_t ipc_out = 0;
		uint8_t status_in = 0;
		uint8_t status_out = 0;
	} m_ipc_interface;

	/* Mouse/Joystick */
	struct
	{
		uint8_t m_mouse_x = 0;
		uint8_t m_mouse_y = 0;

		uint8_t m_mouse_pcx = 0;
		uint8_t m_mouse_pcy = 0;

		uint8_t m_intstate_x = 0;
		uint8_t m_intstate_y = 0;

		uint8_t m_reg0a4 = 0;

		emu_timer *m_mouse_timer = nullptr;
	} m_nimbus_mouse;

	bool m_voice_enabled = false;

	void nimbus_io(address_map &map);
	void nimbus_iocpu_io(address_map &map);
	void nimbus_iocpu_mem(address_map &map);
	void nimbus_mem(address_map &map);

	void decode_dssi_none(uint16_t ds, uint16_t si);
	void decode_dssi_generic(uint16_t ds, uint16_t si);
	void decode_dssi_f_fill_area(uint16_t ds, uint16_t si);
	void decode_dssi_f_plot_character_string(uint16_t ds, uint16_t si);
	void decode_dssi_f_set_new_clt(uint16_t ds, uint16_t si);
	void decode_dssi_f_plonk_char(uint16_t ds, uint16_t si);
	void decode_dssi_f_rw_sectors(uint16_t ds, uint16_t si);

	void debug_command(const std::vector<std::string> &params);
	void video_debug(const std::vector<std::string> &params);
	offs_t dasm_override(std::ostream &stream, offs_t pc, const util::disasm_interface::data_buffer &opcodes, const util::disasm_interface::data_buffer &params);

	TIMER_CALLBACK_MEMBER(do_mouse);
};

#endif // MAME_INCLUDES_RMNIMBUS_H