summaryrefslogtreecommitdiffstatshomepage
path: root/src/emu/cpu/m37710/m37710cm.h
blob: 5f2deabf3a351290fc523658dfd08685cce9e2db (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
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
#pragma once

#ifndef __M37710CM_H__
#define __M37710CM_H__

#define m37710i_branching(A)
#define m37710i_jumping(A)


/* ======================================================================== */
/* ================================ INCLUDES ============================== */
/* ======================================================================== */

#include <limits.h>
#include "m37710.h"


/* ======================================================================== */
/* ================================= MAME ================================= */
/* ======================================================================== */

#undef M37710_CALL_DEBUGGER

#define M37710_CALL_DEBUGGER(x) 		debugger_instruction_hook(cpustate->device, x)
#define m37710_read_8(addr) 			memory_read_byte_16le(cpustate->program, addr)
#define m37710_write_8(addr,data)		memory_write_byte_16le(cpustate->program, addr,data)
#define m37710_read_8_immediate(A)		memory_read_byte_16le(cpustate->program, A)
#define m37710_read_16(addr)			memory_read_word_16le(cpustate->program, addr)
#define m37710_write_16(addr,data)		memory_write_word_16le(cpustate->program, addr,data)
#define m37710_jumping(A)
#define m37710_branching(A)


/* ======================================================================== */
/* ================================ GENERAL =============================== */
/* ======================================================================== */

/* This should be set to the default size of your processor (min 16 bit) */
#undef uint
#define uint unsigned int

#undef uint8
#define uint8 unsigned char

#undef int8

/* Allow for architectures that don't have 8-bit sizes */
#if UCHAR_MAX == 0xff
#define int8 char
#define MAKE_INT_8(A) (int8)((A)&0xff)
#else
#define int8   int
INLINE int MAKE_INT_8(int A) {return (A & 0x80) ? A | ~0xff : A & 0xff;}
#endif /* UCHAR_MAX == 0xff */

#define MAKE_UINT_8(A) ((A)&0xff)
#define MAKE_UINT_16(A) ((A)&0xffff)
#define MAKE_UINT_24(A) ((A)&0xffffff)

/* Bits */
#define BIT_0		0x01
#define BIT_1		0x02
#define BIT_2		0x04
#define BIT_3		0x08
#define BIT_4		0x10
#define BIT_5		0x20
#define BIT_6		0x40
#define BIT_7		0x80

/* ======================================================================== */
/* ================================== CPU ================================= */
/* ======================================================================== */

/* CPU Structure */
typedef struct _m37710i_cpu_struct m37710i_cpu_struct;
struct _m37710i_cpu_struct
{
	uint a;			/* Accumulator */
	uint b;			/* holds high byte of accumulator */
	uint ba;		/* Secondary Accumulator */
	uint bb;		/* holds high byte of secondary accumulator */
	uint x;			/* Index Register X */
	uint y;			/* Index Register Y */
	uint s;			/* Stack Pointer */
	uint pc;		/* Program Counter */
	uint ppc;		/* Previous Program Counter */
	uint pb;		/* Program Bank (shifted left 16) */
	uint db;		/* Data Bank (shifted left 16) */
	uint d;			/* Direct Register */
	uint flag_e;		/* Emulation Mode Flag */
	uint flag_m;		/* Memory/Accumulator Select Flag */
	uint flag_x;		/* Index Select Flag */
	uint flag_n;		/* Negative Flag */
	uint flag_v;		/* Overflow Flag */
	uint flag_d;		/* Decimal Mode Flag */
	uint flag_i;		/* Interrupt Mask Flag */
	uint flag_z;		/* Zero Flag (inverted) */
	uint flag_c;		/* Carry Flag */
	uint line_irq;		/* Bitmask of pending IRQs */
	uint ipl;		/* Interrupt priority level (top of PSW) */
	uint ir;		/* Instruction Register */
	uint im;		/* Immediate load value */
	uint im2;		/* Immediate load target */
	uint im3;		/* Immediate load target */
	uint im4;		/* Immediate load target */
	uint irq_delay;		/* delay 1 instruction before checking irq */
	uint irq_level;		/* irq level */
	int ICount;		/* cycle count */
	uint source;		/* temp register */
	uint destination;	/* temp register */
	device_irq_callback int_ack;
	legacy_cpu_device *device;
	const address_space *program;
	const address_space *io;
	uint stopped;		/* Sets how the CPU is stopped */
	void (*const *opcodes)(m37710i_cpu_struct *cpustate);		/* opcodes with no prefix */
	void (*const *opcodes42)(m37710i_cpu_struct *cpustate);	/* opcodes with 0x42 prefix */
	void (*const *opcodes89)(m37710i_cpu_struct *cpustate);	/* opcodes with 0x89 prefix */
	uint (*get_reg)(m37710i_cpu_struct *cpustate, int regnum);
	void (*set_reg)(m37710i_cpu_struct *cpustate, int regnum, uint val);
	void (*set_line)(m37710i_cpu_struct *cpustate, int line, int state);
	int  (*execute)(m37710i_cpu_struct *cpustate, int cycles);

	// on-board peripheral stuff
	UINT8 m37710_regs[128];
	attotime reload[8];
	emu_timer *timers[8];
};

INLINE m37710i_cpu_struct *get_safe_token(running_device *device)
{
	assert(device != NULL);
	assert(device->type() == CPU);
	assert(cpu_get_type(device) == CPU_M37710 ||
		   cpu_get_type(device) == CPU_M37702);
	return (m37710i_cpu_struct *)downcast<legacy_cpu_device *>(device)->token();
}

extern uint m37710i_adc_tbl[];
extern uint m37710i_sbc_tbl[];

extern void (*const *const m37710i_opcodes[])(m37710i_cpu_struct *cpustate);
extern void (*const *const m37710i_opcodes2[])(m37710i_cpu_struct *cpustate);
extern void (*const *const m37710i_opcodes3[])(m37710i_cpu_struct *cpustate);
extern uint (*const m37710i_get_reg[])(m37710i_cpu_struct *cpustate,int regnum);
extern void (*const m37710i_set_reg[])(m37710i_cpu_struct *cpustate,int regnum, uint val);
extern void (*const m37710i_set_line[])(m37710i_cpu_struct *cpustate,int line, int state);
extern int (*const m37710i_execute[])(m37710i_cpu_struct *cpustate, int cycles);

#define REG_A			cpustate->a		/* Accumulator */
#define REG_B			cpustate->b		/* Accumulator hi byte */
#define REG_BA			cpustate->ba		/* Secondary Accumulator */
#define REG_BB			cpustate->bb		/* Secondary Accumulator hi byte */
#define REG_X			cpustate->x		/* Index X Register */
#define REG_Y			cpustate->y		/* Index Y Register */
#define REG_S			cpustate->s		/* Stack Pointer */
#define REG_PC			cpustate->pc		/* Program Counter */
#define REG_PPC			cpustate->ppc		/* Previous Program Counter */
#define REG_PB			cpustate->pb		/* Program Bank */
#define REG_DB			cpustate->db		/* Data Bank */
#define REG_D			cpustate->d		/* Direct Register */
#define FLAG_M			cpustate->flag_m	/* Memory/Accumulator Select Flag */
#define FLAG_X			cpustate->flag_x	/* Index Select Flag */
#define FLAG_N			cpustate->flag_n	/* Negative Flag */
#define FLAG_V			cpustate->flag_v	/* Overflow Flag */
#define FLAG_D			cpustate->flag_d	/* Decimal Mode Flag */
#define FLAG_I			cpustate->flag_i	/* Interrupt Mask Flag */
#define FLAG_Z			cpustate->flag_z	/* Zero Flag (inverted) */
#define FLAG_C			cpustate->flag_c	/* Carry Flag */
#define LINE_IRQ		cpustate->line_irq	/* Status of the IRQ line */
#define REG_IR			cpustate->ir		/* Instruction Register */
#define REG_IM			cpustate->im		/* Immediate load value */
#define REG_IM2			cpustate->im2		/* Immediate load target */
#define REG_IM3			cpustate->im3		/* Immediate load target */
#define REG_IM4			cpustate->im4		/* Immediate load target */
#define INT_ACK			cpustate->int_ack	/* Interrupt Acknowledge function pointer */
#define CLOCKS			cpustate->ICount		/* Clock cycles remaining */
#define IRQ_DELAY		cpustate->irq_delay /* Delay 1 instruction before checking IRQ */
#define CPU_STOPPED 	cpustate->stopped	/* Stopped status of the CPU */

#define FTABLE_GET_REG	cpustate->get_reg
#define FTABLE_SET_REG	cpustate->set_reg
#define FTABLE_SET_LINE	cpustate->set_line

#define SRC 		cpustate->source		/* Source Operand */
#define DST 		cpustate->destination	/* Destination Operand */

#define STOP_LEVEL_WAI	1
#define STOP_LEVEL_STOP	2

#define EXECUTION_MODE_M0X0	0
#define EXECUTION_MODE_M0X1	1
#define EXECUTION_MODE_M1X0	2
#define EXECUTION_MODE_M1X1	3

INLINE void m37710i_set_execution_mode(m37710i_cpu_struct *cpustate, uint mode)
{
	cpustate->opcodes = m37710i_opcodes[mode];
	cpustate->opcodes42 = m37710i_opcodes2[mode];
	cpustate->opcodes89 = m37710i_opcodes3[mode];
	FTABLE_GET_REG = m37710i_get_reg[mode];
	FTABLE_SET_REG = m37710i_set_reg[mode];
	FTABLE_SET_LINE = m37710i_set_line[mode];
	cpustate->execute = m37710i_execute[mode];
}

/* ======================================================================== */
/* ================================= CLOCK ================================ */
/* ======================================================================== */

#define CLK_OP			1
#define CLK_R8			1
#define CLK_R16			2
#define CLK_R24			3
#define CLK_W8			1
#define CLK_W16			2
#define CLK_W24			3
#define CLK_RMW8		3
#define CLK_RMW16		5

#define CLK_IMPLIED		1
#define CLK_IMPLIED		1
#define CLK_RELATIVE_8	1
#define CLK_RELATIVE_16	2
#define CLK_IMM			0
#define CLK_AI			4
#define CLK_AXI			4
#define CLK_A			2
#define CLK_AL			3
#define CLK_ALX			3
#define CLK_AX			2
#define CLK_AY			2
#define CLK_D			1
#define CLK_DI			3
#define CLK_DIY			3
#define CLK_DLI			4
#define CLK_DLIY		4
#define CLK_DX			2
#define CLK_DXI			4
#define CLK_DY			2
#define CLK_S			2
#define CLK_SIY			5

/* AX and AY addressing modes take 1 extra cycle when writing */
#define CLK_W_IMM		0
#define CLK_W_AI		4
#define CLK_W_AXI		4
#define CLK_W_A			2
#define CLK_W_AL		3
#define CLK_W_ALX		3
#define CLK_W_AX		3
#define CLK_W_AY		3
#define CLK_W_D			1
#define CLK_W_DI		3
#define CLK_W_DIY		3
#define CLK_W_DLI		4
#define CLK_W_DLIY		4
#define CLK_W_DX		2
#define CLK_W_DXI		4
#define CLK_W_DY		2
#define CLK_W_S			2
#define CLK_W_SIY		5

#define CLK(A)			CLOCKS -= (A)
#define USE_ALL_CLKS()	CLOCKS = 0


/* ======================================================================== */
/* ============================ STATUS REGISTER =========================== */
/* ======================================================================== */

/* Flag positions in Processor Status Register */
/* common */
#define FLAGPOS_N		BIT_7	/* Negative         */
#define FLAGPOS_V		BIT_6	/* Overflow         */
#define FLAGPOS_D		BIT_3	/* Decimal Mode     */
#define FLAGPOS_I		BIT_2	/* Interrupt Mask   */
#define FLAGPOS_Z		BIT_1	/* Zero             */
#define FLAGPOS_C		BIT_0	/* Carry            */
/* emulation */
#define FLAGPOS_R		BIT_5	/* Reserved         */
#define FLAGPOS_B		BIT_4	/* BRK Instruction  */
/* native */
#define FLAGPOS_M		BIT_5	/* Mem/Reg Select   */
#define FLAGPOS_X		BIT_4	/* Index Select     */

#define EFLAG_SET   	1
#define EFLAG_CLEAR 	0
#define MFLAG_SET   	FLAGPOS_M
#define MFLAG_CLEAR 	0
#define XFLAG_SET   	FLAGPOS_X
#define XFLAG_CLEAR 	0
#define NFLAG_SET   	0x80
#define NFLAG_CLEAR 	0
#define VFLAG_SET   	0x80
#define VFLAG_CLEAR 	0
#define DFLAG_SET   	FLAGPOS_D
#define DFLAG_CLEAR 	0
#define IFLAG_SET   	FLAGPOS_I
#define IFLAG_CLEAR 	0
#define BFLAG_SET   	FLAGPOS_B
#define BFLAG_CLEAR 	0
#define ZFLAG_SET   	0
#define ZFLAG_CLEAR 	1
#define CFLAG_SET   	0x100
#define CFLAG_CLEAR 	0

/* Codition code tests */
#define COND_CC()		(!(FLAG_C&0x100))	/* Carry Clear */
#define COND_CS()		(FLAG_C&0x100)		/* Carry Set */
#define COND_EQ()		(!FLAG_Z)			/* Equal */
#define COND_NE()		FLAG_Z				/* Not Equal */
#define COND_MI()		(FLAG_N&0x80)		/* Minus */
#define COND_PL()		(!(FLAG_N&0x80))	/* Plus */
#define COND_VC()		(!(FLAG_V&0x80))	/* Overflow Clear */
#define COND_VS()		(FLAG_V&0x80)		/* Overflow Set */

/* Set Overflow flag in math operations */
#define VFLAG_ADD_8(S, D, R)	((S^R) & (D^R))
#define VFLAG_ADD_16(S, D, R)	(((S^R) & (D^R))>>8)
#define VFLAG_SUB_8(S, D, R)	((S^D) & (R^D))
#define VFLAG_SUB_16(S, D, R)	(((S^D) & (R^D))>>8)

#define CFLAG_8(A)		(A)
#define CFLAG_16(A)		((A)>>8)
#define NFLAG_8(A)		(A)
#define NFLAG_16(A)		((A)>>8)

#define CFLAG_AS_1()	((FLAG_C>>8)&1)

/* update IRQ state (internal use only) */
void m37710i_update_irqs(m37710i_cpu_struct *cpustate);

/* ======================================================================== */
/* ================================== CPU ================================= */
/* ======================================================================== */
#endif /* __M37710CM_H__ */