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1 | #include <stdio.h> |
2 | #include <stdlib.h> |
3 | |
4 | #include "types.h" |
5 | #include "x6502.h" |
6 | #include "fce.h" |
7 | |
8 | // asm core state |
9 | extern uint32 nes_registers[0x10]; |
10 | extern uint32 pc_base; |
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11 | extern uint8 nes_internal_ram[0x800]; |
12 | uint32 PC_prev = 0xcccccc, OP_prev = 0xcccccc; |
13 | int32 g_cnt = 0; |
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14 | |
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15 | static int pending_add_cycles = 0, pending_rebase = 0, pending_irq = 0; |
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16 | |
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17 | uint8 dreads[4]; |
18 | uint32 dwrites_c[2], dwrites_a[2]; |
19 | int dread_count_c, dread_count_a, dwrite_count_c, dwrite_count_a; |
20 | |
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21 | static void leave(void) |
22 | { |
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23 | printf("\nA: %02x, X: %02x, Y: %02x, S: %02x\n", X.A, X.X, X.Y, X.S); |
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24 | printf("PC = %04lx, OP=%02lX\n", PC_prev, OP_prev); |
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25 | exit(1); |
26 | } |
27 | |
28 | static void compare_state(void) |
29 | { |
30 | uint8 nes_flags; |
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31 | int i, fail = 0; |
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32 | |
33 | if ((nes_registers[0] >> 24) != X.A) { |
34 | printf("A: %02lx vs %02x\n", nes_registers[0] >> 24, X.A); |
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35 | fail = 1; |
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36 | } |
37 | |
38 | if ((nes_registers[1] & 0xff) != X.X) { |
39 | printf("X: %02lx vs %02x\n", nes_registers[1] & 0xff, X.X); |
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40 | fail = 1; |
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41 | } |
42 | |
43 | if ((nes_registers[2] & 0xff) != X.Y) { |
44 | printf("Y: %02lx vs %02x\n", nes_registers[2] & 0xff, X.Y); |
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45 | fail = 1; |
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46 | } |
47 | |
48 | if (nes_registers[3] - pc_base != X.PC) { |
49 | printf("PC: %04lx vs %04x\n", nes_registers[3] - pc_base, X.PC); |
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50 | fail = 1; |
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51 | } |
52 | |
53 | if ((nes_registers[4] >> 24) != X.S) { |
54 | printf("S: %02lx vs %02x\n", nes_registers[4] >> 24, X.S); |
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55 | fail = 1; |
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56 | } |
57 | |
58 | if (((nes_registers[4]>>8)&0xff) != X.IRQlow) { |
59 | printf("IRQlow: %02lx vs %02x\n", ((nes_registers[4]>>8)&0xff), X.IRQlow); |
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60 | fail = 1; |
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61 | } |
62 | |
63 | // NVUB DIZC |
64 | nes_flags = nes_registers[4] & 0x5d; |
65 | if ( nes_registers[5]&0x80000000) nes_flags |= 0x80; // N |
66 | if (!(nes_registers[5]&0x000000ff)) nes_flags |= 0x02; // Z |
67 | // nes_flags |= 0x20; // U, not set in C core (set only when pushing) |
68 | |
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69 | if (nes_flags != (X.P&~0x20)) { |
70 | printf("flags: %02x vs %02x\n", nes_flags, (X.P&~0x20)); |
71 | fail = 1; |
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72 | } |
73 | |
74 | if ((int32)nes_registers[7] != X.count) { |
75 | printf("cycles: %li vs %li\n", (int32)nes_registers[7], X.count); |
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76 | fail = 1; |
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77 | } |
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78 | |
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79 | if (dread_count_a != dread_count_c) { |
80 | printf("dread_count: %i vs %i\n", dread_count_a, dread_count_c); |
81 | fail = 1; |
82 | } |
83 | |
84 | if (dwrite_count_a != dwrite_count_c) { |
85 | printf("dwrite_count: %i vs %i\n", dwrite_count_a, dwrite_count_c); |
86 | fail = 1; |
87 | } |
88 | |
89 | for (i = dwrite_count_a - 1; !fail && i >= 0; i--) |
90 | if (dwrites_a[i] != dwrites_c[i]) { |
91 | printf("dwrites[%i]: %06lx vs %06lx\n", dwrite_count_a, dwrites_a[i], dwrites_c[i]); |
92 | fail = 1; |
93 | } |
94 | |
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95 | if (fail) leave(); |
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96 | } |
97 | |
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98 | #if 1 |
99 | static void compare_ram(void) |
100 | { |
101 | int i, fail = 0; |
102 | for (i = 0; i < 0x800/4; i++) |
103 | { |
104 | if (((int *)nes_internal_ram)[i] != ((int32 *)RAM)[i]) { |
105 | int u; |
106 | fail = 1; |
107 | for (u = i*4; u < i*4+4; u++) |
108 | if (nes_internal_ram[u] != RAM[u]) |
109 | printf("RAM[%03x]: %02x vs %02x\n", u, nes_internal_ram[u], RAM[u]); |
110 | } |
111 | } |
112 | |
113 | if (fail) leave(); |
114 | } |
115 | #endif |
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116 | |
117 | void TriggerIRQ_d(void) |
118 | { |
119 | printf("-- irq\n"); |
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120 | pending_irq |= 0x100; |
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121 | } |
122 | |
123 | void TriggerNMI_d(void) |
124 | { |
125 | printf("-- nmi\n"); |
126 | TriggerNMI_c(); |
127 | TriggerNMI_a(); |
128 | compare_state(); |
129 | } |
130 | |
131 | void TriggerNMINSF_d(void) |
132 | { |
133 | } |
134 | |
135 | void X6502_Run_d(int32 c) |
136 | { |
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137 | int32 cycles = c << 4; /* *16 */ |
138 | if (PAL) cycles -= c; /* *15 */ |
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139 | |
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140 | //printf("-- %06i: run(%i)\n", (int)g_cnt, (int)c); |
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141 | g_cnt += cycles; |
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142 | |
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143 | if (c > 200) |
144 | compare_ram(); |
145 | |
146 | while (g_cnt > 0) |
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147 | { |
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148 | if (pending_irq) { |
149 | if (pending_irq & 0x100) { |
150 | TriggerIRQ_c(); |
151 | TriggerIRQ_a(); |
152 | } |
153 | if (pending_irq & 0xff) { |
154 | TriggerIRQ_c(); |
155 | TriggerIRQ_a(); |
156 | X6502_IRQBegin_c(pending_irq & 0xff); |
157 | X6502_IRQBegin_a(pending_irq & 0xff); |
158 | } |
159 | pending_irq = 0; |
160 | } |
161 | |
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162 | nes_registers[7]=1; |
163 | X.count=1; |
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164 | |
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165 | dread_count_c = dread_count_a = dwrite_count_c = dwrite_count_a = 0; |
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166 | X6502_Run_c(); |
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167 | |
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168 | X6502_Run_a(); |
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169 | |
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170 | compare_state(); |
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171 | g_cnt -= 1 - X.count; |
172 | if (pending_add_cycles) { |
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173 | g_cnt -= pending_add_cycles*48; |
174 | pending_add_cycles = 0; |
175 | } |
176 | if (pending_rebase) { |
177 | X6502_Rebase_a(); |
178 | pending_rebase = 0; |
179 | } |
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180 | } |
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181 | |
182 | //printf("-- run_end\n"); |
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183 | } |
184 | |
185 | void X6502_Reset_d(void) |
186 | { |
187 | printf("-- reset\n"); |
188 | |
189 | X6502_Reset_c(); |
190 | X6502_Reset_a(); |
191 | compare_state(); |
192 | } |
193 | |
194 | void X6502_Power_d(void) |
195 | { |
196 | printf("-- power\n"); |
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197 | if (nes_internal_ram == RAM) printf("nes_internal_ram == RAM!!\n"); |
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198 | dread_count_c = dread_count_a = dwrite_count_c = dwrite_count_a = 0; |
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199 | |
200 | X6502_Power_c(); |
201 | X6502_Power_a(); |
202 | compare_state(); |
203 | } |
204 | |
205 | void X6502_AddCycles_d(int x) |
206 | { |
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207 | printf("-- AddCycles(%i|%i)\n", x, x*48); |
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208 | |
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209 | pending_add_cycles = x; // *48; |
210 | // printf("can't use this in debug\n"); |
211 | // exit(1); |
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212 | //X6502_AddCycles_c(x); |
213 | //X6502_AddCycles_a(x); |
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214 | //compare_state(); |
215 | } |
216 | |
217 | void X6502_IRQBegin_d(int w) |
218 | { |
219 | printf("-- IRQBegin(%02x)\n", w); |
220 | |
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221 | // X6502_IRQBegin_c(w); |
222 | // X6502_IRQBegin_a(w); |
223 | pending_irq |= w; |
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224 | } |
225 | |
226 | void X6502_IRQEnd_d(int w) |
227 | { |
228 | printf("-- IRQEnd(%02x)\n", w); |
229 | |
230 | X6502_IRQEnd_c(w); |
231 | X6502_IRQEnd_a(w); |
232 | } |
233 | |
234 | |
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235 | void X6502_Rebase_d(void) |
236 | { |
237 | pending_rebase = 1; |
238 | } |
239 | |
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240 | |