-
Notifications
You must be signed in to change notification settings - Fork 15
/
6801.py
278 lines (255 loc) · 10.2 KB
/
6801.py
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
##########################################################################
#
# Processor specific code
# 13/6/2023: 6801 / 6803 support added by Merlin Skinner-Oakes for Jeff
# Tranter's Universal Disassembler (udis)
# CPU = "6801"
# Description = "Motorola 6801/6803 8-bit microprocessor."
# DataWidth = 8 # 8-bit data
# AddressWidth = 16 # 16-bit addresses
# Maximum length of an instruction (for formatting purposes)
maxLength = 3
# Leadin bytes for multibyte instructions
leadInBytes = []
# Addressing mode table
# List of addressing modes and corresponding format strings for operands.
addressModeTable = {
"implied" : "",
"immediate" : "#${0:02X}",
"immediatex" : "#${0:02X}{1:02X}",
"direct" : "${0:02X}",
"indexed" : "${0:02X},x",
"extended" : "${0:02X}{1:02X}",
"relative" : "${0:04X}",
}
# Op Code Table
# Key is numeric opcode (possibly multiple bytes)
# Value is a list:
# # bytes
# mnemonic
# addressing mode
# flags (e.g. pcr)
opcodeTable = {
0x01 : [ 1, "nop", "implied" ],
0x04 : [ 1, "lsld", "implied" ], # 6801 / 6803 only
0x05 : [ 1, "asld", "implied" ], # 6801 / 6803 only
0x06 : [ 1, "tap", "implied" ],
0x07 : [ 1, "tpa", "implied" ],
0x08 : [ 1, "inx", "implied" ],
0x09 : [ 1, "dex", "implied" ],
0x0a : [ 1, "clv", "implied" ],
0x0b : [ 1, "sev", "implied" ],
0x0c : [ 1, "clc", "implied" ],
0x0d : [ 1, "sec", "implied" ],
0x0e : [ 1, "cli", "implied" ],
0x0f : [ 1, "sei", "implied" ],
0x10 : [ 1, "sba", "implied" ],
0x11 : [ 1, "cba", "implied" ],
0x16 : [ 1, "tab", "implied" ],
0x17 : [ 1, "tba", "implied" ],
0x19 : [ 1, "daa", "implied" ],
0x1b : [ 1, "aba", "implied" ],
0x20 : [ 2, "bra", "relative", pcr ],
0x21 : [ 2, "brn", "relative", pcr ], # 6801 / 6803 only
0x22 : [ 2, "bhi", "relative", pcr ],
0x23 : [ 2, "bls", "relative", pcr ],
0x24 : [ 2, "bcc", "relative", pcr ],
0x25 : [ 2, "bcs", "relative", pcr ],
0x26 : [ 2, "bne", "relative", pcr ],
0x27 : [ 2, "beq", "relative", pcr ],
0x28 : [ 2, "bvc", "relative", pcr ],
0x29 : [ 2, "bvs", "relative", pcr ],
0x2a : [ 2, "bpl", "relative", pcr ],
0x2b : [ 2, "bmi", "relative", pcr ],
0x2c : [ 2, "bge", "relative", pcr ],
0x2d : [ 2, "blt", "relative", pcr ],
0x2e : [ 2, "bgt", "relative", pcr ],
0x2f : [ 2, "ble", "relative", pcr ],
0x30 : [ 1, "tsx", "implied" ],
0x31 : [ 1, "ins", "implied" ],
0x32 : [ 1, "pula", "implied" ],
0x33 : [ 1, "pulb", "implied" ],
0x34 : [ 1, "des", "implied" ],
0x35 : [ 1, "txs", "implied" ],
0x36 : [ 1, "psha", "implied" ],
0x37 : [ 1, "pshb", "implied" ],
0x38 : [ 1, "pulx", "implied" ], # 6801 / 6803 only
0x39 : [ 1, "rts", "implied" ],
0x3a : [ 1, "abx", "implied" ], # 6801 / 6803 only
0x3b : [ 1, "rti", "implied" ],
0x3c : [ 1, "pshx", "implied" ], # 6801 / 6803 only
0x3d : [ 1, "mul", "implied" ], # 6801 / 6803 only
0x3e : [ 1, "wai", "implied" ],
0x3f : [ 1, "swi", "implied" ],
0x40 : [ 1, "nega", "implied" ],
0x43 : [ 1, "coma", "implied" ],
0x44 : [ 1, "lsra", "implied" ],
0x46 : [ 1, "rora", "implied" ],
0x47 : [ 1, "asra", "implied" ],
0x48 : [ 1, "asla", "implied" ],
0x49 : [ 1, "rola", "implied" ],
0x4a : [ 1, "deca", "implied" ],
0x4c : [ 1, "inca", "implied" ],
0x4d : [ 1, "tsta", "implied" ],
0x4f : [ 1, "clra", "implied" ],
0x50 : [ 1, "negb", "implied" ],
0x53 : [ 1, "comb", "implied" ],
0x54 : [ 1, "lsrb", "implied" ],
0x56 : [ 1, "rorb", "implied" ],
0x57 : [ 1, "asrb", "implied" ],
0x58 : [ 1, "aslb", "implied" ],
0x59 : [ 1, "rolb", "implied" ],
0x5a : [ 1, "decb", "implied" ],
0x5c : [ 1, "incb", "implied" ],
0x5d : [ 1, "tstb", "implied" ],
0x5f : [ 1, "clrb", "implied" ],
0x60 : [ 2, "neg", "indexed" ],
0x63 : [ 2, "com", "indexed" ],
0x64 : [ 2, "lsr", "indexed" ],
0x66 : [ 2, "ror", "indexed" ],
0x67 : [ 2, "asr", "indexed" ],
0x68 : [ 2, "asl", "indexed" ],
0x69 : [ 2, "rol", "indexed" ],
0x6a : [ 2, "dec", "indexed" ],
0x6c : [ 2, "inc", "indexed" ],
0x6d : [ 2, "tst", "indexed" ],
0x6e : [ 2, "jmp", "indexed" ],
0x6f : [ 2, "clr", "indexed" ],
0x70 : [ 3, "neg", "extended" ],
0x73 : [ 3, "com", "extended" ],
0x74 : [ 3, "lsr", "extended" ],
0x76 : [ 3, "ror", "extended" ],
0x77 : [ 3, "asr", "extended" ],
0x78 : [ 3, "asl", "extended" ],
0x79 : [ 3, "rol", "extended" ],
0x7a : [ 3, "dec", "extended" ],
0x7c : [ 3, "inc", "extended" ],
0x7d : [ 3, "tst", "extended" ],
0x7e : [ 3, "jmp", "extended" ],
0x7f : [ 3, "clr", "extended" ],
0x80 : [ 2, "suba", "immediate" ],
0x81 : [ 2, "cmpa", "immediate" ],
0x82 : [ 2, "sbca", "immediate" ],
0x83 : [ 3, "subd", "immediatex" ], # 6801 / 6803 only
0x84 : [ 2, "anda", "immediate" ],
0x85 : [ 2, "bita", "immediate" ],
0x86 : [ 2, "ldaa", "immediate" ],
0x88 : [ 2, "eora", "immediate" ],
0x89 : [ 2, "adca", "immediate" ],
0x8a : [ 2, "oraa", "immediate" ],
0x8b : [ 2, "adda", "immediate" ],
0x8c : [ 3, "cpx", "immediatex" ],
0x8d : [ 2, "bsr", "relative", pcr ],
0x8e : [ 3, "lds", "immediatex" ],
0x90 : [ 2, "suba", "direct" ],
0x91 : [ 2, "cmpa", "direct" ],
0x92 : [ 2, "sbca", "direct" ],
0x93 : [ 2, "subd", "direct" ], # 6801 / 6803 only
0x94 : [ 2, "anda", "direct" ],
0x95 : [ 2, "bita", "direct" ],
0x96 : [ 2, "ldaa", "direct" ],
0x97 : [ 2, "staa", "direct" ],
0x98 : [ 2, "eora", "direct" ],
0x99 : [ 2, "adca", "direct" ],
0x9a : [ 2, "oraa", "direct" ],
0x9b : [ 2, "adda", "direct" ],
0x9c : [ 2, "cpx", "direct" ],
0x9d : [ 2, "jsr", "direct" ], # 6801 / 6803 only
0x9e : [ 2, "lds", "direct" ],
0x9f : [ 2, "sts", "direct" ],
0xa0 : [ 2, "suba", "indexed" ],
0xa1 : [ 2, "cmpa", "indexed" ],
0xa2 : [ 2, "sbca", "indexed" ],
0xa3 : [ 2, "subd", "indexed" ], # 6801 / 6803 only
0xa4 : [ 2, "anda", "indexed" ],
0xa5 : [ 2, "bita", "indexed" ],
0xa6 : [ 2, "ldaa", "indexed" ],
0xa7 : [ 2, "staa", "indexed" ],
0xa8 : [ 2, "eora", "indexed" ],
0xa9 : [ 2, "adca", "indexed" ],
0xaa : [ 2, "oraa", "indexed" ],
0xab : [ 2, "adda", "indexed" ],
0xac : [ 2, "cpx", "indexed" ],
0xad : [ 2, "jsr", "indexed" ],
0xae : [ 2, "lds", "indexed" ],
0xaf : [ 2, "sts", "indexed" ],
0xb0 : [ 3, "suba", "extended" ],
0xb1 : [ 3, "cmpa", "extended" ],
0xb2 : [ 3, "sbca", "extended" ],
0xb3 : [ 3, "subd", "extended" ], # 6801 / 6803 only
0xb4 : [ 3, "anda", "extended" ],
0xb5 : [ 3, "bita", "extended" ],
0xb6 : [ 3, "ldaa", "extended" ],
0xb7 : [ 3, "staa", "extended" ],
0xb8 : [ 3, "eora", "extended" ],
0xb9 : [ 3, "adca", "extended" ],
0xba : [ 3, "oraa", "extended" ],
0xbb : [ 3, "adda", "extended" ],
0xbc : [ 3, "cpx", "extended" ],
0xbd : [ 3, "jsr", "extended" ],
0xbe : [ 3, "lds", "extended" ],
0xbf : [ 3, "sts", "extended" ],
0xc0 : [ 2, "subb", "immediate" ],
0xc1 : [ 2, "cmpb", "immediate" ],
0xc2 : [ 2, "sbcb", "immediate" ],
0xc3 : [ 3, "addd", "immediatex" ], # 6801 / 6803 only
0xc4 : [ 2, "andb", "immediate" ],
0xc5 : [ 2, "bitb", "immediate" ],
0xc6 : [ 2, "ldab", "immediate" ],
0xc8 : [ 2, "eorb", "immediate" ],
0xc9 : [ 2, "adcb", "immediate" ],
0xca : [ 2, "orab", "immediate" ],
0xcb : [ 2, "addb", "immediate" ],
0xcc : [ 3, "ldd", "immediatex" ], # 6801 / 6803 only
0xce : [ 3, "ldx", "immediatex" ],
0xd0 : [ 2, "subb", "direct" ],
0xd1 : [ 2, "cmpb", "direct" ],
0xd2 : [ 2, "sbcb", "direct" ],
0xd3 : [ 2, "addd", "direct" ], # 6801 / 6803 only
0xd4 : [ 2, "andb", "direct" ],
0xd5 : [ 2, "bitb", "direct" ],
0xd6 : [ 2, "ldab", "direct" ],
0xd7 : [ 2, "stab", "direct" ],
0xd8 : [ 2, "eorb", "direct" ],
0xd9 : [ 2, "adcb", "direct" ],
0xda : [ 2, "orab", "direct" ],
0xdb : [ 2, "addb", "direct" ],
0xdc : [ 2, "ldd", "direct" ], # 6801 / 6803 only
0xdd : [ 2, "std", "direct" ], # 6801 / 6803 only
0xde : [ 2, "ldx", "direct" ],
0xdf : [ 2, "stx", "direct" ],
0xe0 : [ 2, "subb", "indexed" ],
0xe1 : [ 2, "cmpb", "indexed" ],
0xe2 : [ 2, "sbcb", "indexed" ],
0xe3 : [ 2, "addd", "indexed" ], # 6801 / 6803 only
0xe4 : [ 2, "andb", "indexed" ],
0xe5 : [ 2, "bitb", "indexed" ],
0xe6 : [ 2, "ldab", "indexed" ],
0xe7 : [ 2, "stab", "indexed" ],
0xe8 : [ 2, "eorb", "indexed" ],
0xe9 : [ 2, "adcb", "indexed" ],
0xea : [ 2, "orab", "indexed" ],
0xeb : [ 2, "addb", "indexed" ],
0xec : [ 2, "ldd", "indexed" ], # 6801 / 6803 only
0xed : [ 2, "std", "indexed" ], # 6801 / 6803 only
0xee : [ 2, "ldx", "indexed" ],
0xef : [ 2, "stx", "indexed" ],
0xf0 : [ 3, "subb", "extended" ],
0xf1 : [ 3, "cmpb", "extended" ],
0xf2 : [ 3, "sbcb", "extended" ],
0xf3 : [ 3, "addd", "extended" ], # 6801 / 6803 only
0xf4 : [ 3, "andb", "extended" ],
0xf5 : [ 3, "bitb", "extended" ],
0xf6 : [ 3, "ldab", "extended" ],
0xf7 : [ 3, "stab", "extended" ],
0xf8 : [ 3, "eorb", "extended" ],
0xf9 : [ 3, "adcb", "extended" ],
0xfa : [ 3, "orab", "extended" ],
0xfb : [ 3, "addb", "extended" ],
0xfc : [ 3, "ldd", "extended" ], # 6801 / 6803 only
0xfd : [ 3, "std", "extended" ], # 6801 / 6803 only
0xfe : [ 3, "ldx", "extended" ],
0xff : [ 3, "stx", "extended" ],
}
# End of processor specific code
##########################################################################