blob: e21171c7ed7db25da5cd14e0e17e8f47f1d1df4e (
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
|
// license:???
// copyright-holders:???
/*******************************************************
*
* Portable (hopefully ;-) 8085A emulator
*
* Written by J. Buchmueller for use with MAME
*
* Partially based on Z80Em by Marcel De Kogel
*
* CPU related macros
*
*******************************************************/
#define SF 0x80
#define ZF 0x40
#define X5F 0x20
#define HF 0x10
#define X3F 0x08
#define PF 0x04
#define VF 0x02
#define CF 0x01
#define IM_SID 0x80
#define IM_I75 0x40
#define IM_I65 0x20
#define IM_I55 0x10
#define IM_IE 0x08
#define IM_M75 0x04
#define IM_M65 0x02
#define IM_M55 0x01
#define ADDR_TRAP 0x0024
#define ADDR_RST55 0x002c
#define ADDR_RST65 0x0034
#define ADDR_RST75 0x003c
#define ADDR_INTR 0x0038
#define M_MVI(R) R=ARG()
/* rotate */
#define M_RLC { \
m_AF.b.h = (m_AF.b.h << 1) | (m_AF.b.h >> 7); \
m_AF.b.l = (m_AF.b.l & 0xfe) | (m_AF.b.h & CF); \
}
#define M_RRC { \
m_AF.b.l = (m_AF.b.l & 0xfe) | (m_AF.b.h & CF); \
m_AF.b.h = (m_AF.b.h >> 1) | (m_AF.b.h << 7); \
}
#define M_RAL { \
int c = m_AF.b.l&CF; \
m_AF.b.l = (m_AF.b.l & 0xfe) | (m_AF.b.h >> 7); \
m_AF.b.h = (m_AF.b.h << 1) | c; \
}
#define M_RAR { \
int c = (m_AF.b.l&CF) << 7; \
m_AF.b.l = (m_AF.b.l & 0xfe) | (m_AF.b.h & CF); \
m_AF.b.h = (m_AF.b.h >> 1) | c; \
}
/* logical */
#define M_ORA(R) m_AF.b.h|=R; m_AF.b.l=ZSP[m_AF.b.h]
#define M_XRA(R) m_AF.b.h^=R; m_AF.b.l=ZSP[m_AF.b.h]
#define M_ANA(R) {UINT8 hc = ((m_AF.b.h | R)<<1) & HF; m_AF.b.h&=R; m_AF.b.l=ZSP[m_AF.b.h]; if(IS_8085()) { m_AF.b.l |= HF; } else {m_AF.b.l |= hc; } }
/* increase / decrease */
#define M_INR(R) {UINT8 hc = ((R & 0x0f) == 0x0f) ? HF : 0; ++R; m_AF.b.l= (m_AF.b.l & CF ) | ZSP[R] | hc; }
#define M_DCR(R) {UINT8 hc = ((R & 0x0f) != 0x00) ? HF : 0; --R; m_AF.b.l= (m_AF.b.l & CF ) | ZSP[R] | hc | VF; }
/* arithmetic */
#define M_ADD(R) { \
int q = m_AF.b.h+R; \
m_AF.b.l=ZSP[q&255]|((q>>8)&CF)|((m_AF.b.h^q^R)&HF); \
m_AF.b.h=q; \
}
#define M_ADC(R) { \
int q = m_AF.b.h+R+(m_AF.b.l&CF); \
m_AF.b.l=ZSP[q&255]|((q>>8)&CF)|((m_AF.b.h^q^R)&HF); \
m_AF.b.h=q; \
}
#define M_SUB(R) { \
int q = m_AF.b.h-R; \
m_AF.b.l=ZSP[q&255]|((q>>8)&CF)|(~(m_AF.b.h^q^R)&HF)|VF; \
m_AF.b.h=q; \
}
#define M_SBB(R) { \
int q = m_AF.b.h-R-(m_AF.b.l&CF); \
m_AF.b.l=ZSP[q&255]|((q>>8)&CF)|(~(m_AF.b.h^q^R)&HF)|VF; \
m_AF.b.h=q; \
}
#define M_CMP(R) { \
int q = m_AF.b.h-R; \
m_AF.b.l=ZSP[q&255]|((q>>8)&CF)|(~(m_AF.b.h^q^R)&HF)|VF; \
}
#define M_DAD(R) { \
int q = m_HL.d + m_##R.d; \
m_AF.b.l = (m_AF.b.l & ~CF) | (q>>16 & CF ); \
m_HL.w.l = q; \
}
// DSUB is 8085-only, not sure if H flag handling is correct
#define M_DSUB() { \
int q = m_HL.b.l-m_BC.b.l; \
m_AF.b.l=ZS[q&255]|((q>>8)&CF)|VF| \
((m_HL.b.l^q^m_BC.b.l)&HF)| \
(((m_BC.b.l^m_HL.b.l)&(m_HL.b.l^q)&SF)>>5); \
m_HL.b.l=q; \
q = m_HL.b.h-m_BC.b.h-(m_AF.b.l&CF); \
m_AF.b.l=ZS[q&255]|((q>>8)&CF)|VF| \
((m_HL.b.h^q^m_BC.b.h)&HF)| \
(((m_BC.b.h^m_HL.b.h)&(m_HL.b.h^q)&SF)>>5); \
if (m_HL.b.l!=0) m_AF.b.l&=~ZF; \
}
/* i/o */
#define M_IN \
m_STATUS = 0x42; \
m_WZ.d=ARG(); \
m_AF.b.h=m_io->read_byte(m_WZ.d);
#define M_OUT \
m_STATUS = 0x10; \
m_WZ.d=ARG(); \
m_io->write_byte(m_WZ.d,m_AF.b.h)
/* stack */
#define M_PUSH(R) { \
m_STATUS = 0x04; \
m_program->write_byte(--m_SP.w.l, m_##R.b.h); \
m_program->write_byte(--m_SP.w.l, m_##R.b.l); \
}
#define M_POP(R) { \
m_STATUS = 0x86; \
m_##R.b.l = m_program->read_byte(m_SP.w.l++); \
m_##R.b.h = m_program->read_byte(m_SP.w.l++); \
}
/* jumps */
// On 8085 jump if condition is not satisfied is shorter
#define M_JMP(cc) { \
if (cc) { \
m_PC.w.l = ARG16(); \
} else { \
m_PC.w.l += 2; \
m_icount += (IS_8085()) ? 3 : 0; \
} \
}
// On 8085 call if condition is not satisfied is 9 ticks
#define M_CALL(cc) \
{ \
if (cc) \
{ \
UINT16 a = ARG16(); \
m_icount -= (IS_8085()) ? 7 : 6 ; \
M_PUSH(PC); \
m_PC.d = a; \
} else { \
m_PC.w.l += 2; \
m_icount += (IS_8085()) ? 2 : 0; \
} \
}
// conditional RET only
#define M_RET(cc) \
{ \
if (cc) \
{ \
m_icount -= 6; \
M_POP(PC); \
} \
}
#define M_RST(nn) { \
M_PUSH(PC); \
m_PC.d = 8 * nn; \
}
|