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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
9extern uint32 nes_registers[0x10];
10extern uint32 pc_base;
11extern uint8 nes_internal_ram[0x800];
12extern uint32 timestamp_a;
13extern uint32 framecount;
14static uint32 framecount_d;
15uint32 PC_prev = 0xcccccc, OP_prev = 0xcccccc;
16int32 g_cnt = 0;
17
18static int pending_add_cycles = 0, pending_rebase = 0, pending_irq = 0;
19
20uint8 dreads[4];
21uint32 dwrites_c[2], dwrites_a[2];
22int dread_count_c, dread_count_a, dwrite_count_c, dwrite_count_a;
23int mapirq_cyc_c, mapirq_cyc_a;
24
25static void leave(void)
26{
27 printf("\nA: %02x, X: %02x, Y: %02x, S: %02x\n", X.A, X.X, X.Y, X.S);
28 printf("PC = %04x, OP=%02X\n", PC_prev, OP_prev);
29 printf("rest = %08x\n", nes_registers[4]);
30 exit(1);
31}
32
33static void compare_state(void)
34{
35 uint8 nes_flags;
36 int i, fail = 0;
37
38 if ((nes_registers[0] >> 24) != X.A) {
39 printf("A: %02x vs %02x\n", nes_registers[0] >> 24, X.A);
40 fail = 1;
41 }
42
43 if ((nes_registers[1] & 0xff) != X.X) {
44 printf("X: %02x vs %02x\n", nes_registers[1] & 0xff, X.X);
45 fail = 1;
46 }
47
48 if ((nes_registers[2] & 0xff) != X.Y) {
49 printf("Y: %02x vs %02x\n", nes_registers[2] & 0xff, X.Y);
50 fail = 1;
51 }
52
53 if (nes_registers[3] - pc_base != X.PC) {
54 printf("PC: %04x vs %04x\n", nes_registers[3] - pc_base, X.PC);
55 fail = 1;
56 }
57
58 if ((nes_registers[4] >> 24) != X.S) {
59 printf("S: %02x vs %02x\n", nes_registers[4] >> 24, X.S);
60 fail = 1;
61 }
62
63 if (((nes_registers[4]>>8)&0xff) != X.IRQlow) {
64 printf("IRQlow: %02x vs %02x\n", ((nes_registers[4]>>8)&0xff), X.IRQlow);
65 fail = 1;
66 }
67
68 // NVUB DIZC
69 nes_flags = nes_registers[4] & 0x5d;
70 if ( nes_registers[5]&0x80000000) nes_flags |= 0x80; // N
71 if (!(nes_registers[5]&0x000000ff)) nes_flags |= 0x02; // Z
72 // nes_flags |= 0x20; // U, not set in C core (set only when pushing)
73
74 if (nes_flags != (X.P&~0x20)) {
75 printf("flags: %02x vs %02x\n", nes_flags, (X.P&~0x20));
76 fail = 1;
77 }
78
79 if (((int32)nes_registers[7] >> 16) != X.count) {
80 printf("cycles: %i vs %i\n", (int32)nes_registers[7] >> 16, X.count);
81 fail = 1;
82 }
83
84 if (dread_count_a != dread_count_c) {
85 printf("dread_count: %i vs %i\n", dread_count_a, dread_count_c);
86 fail = 1;
87 }
88
89 if (dwrite_count_a != dwrite_count_c) {
90 printf("dwrite_count: %i vs %i\n", dwrite_count_a, dwrite_count_c);
91 fail = 1;
92 }
93
94 for (i = dwrite_count_a - 1; !fail && i >= 0; i--)
95 if (dwrites_a[i] != dwrites_c[i]) {
96 printf("dwrites[%i]: %06x vs %06x\n", dwrite_count_a, dwrites_a[i], dwrites_c[i]);
97 fail = 1;
98 }
99
100 if (mapirq_cyc_a != mapirq_cyc_c) {
101 printf("mapirq_cyc: %i vs %i\n", mapirq_cyc_a, mapirq_cyc_c);
102 fail = 1;
103 }
104
105 if (timestamp_a != timestamp) {
106 printf("timestamp: %u vs %u\n", timestamp_a, timestamp);
107 fail = 1;
108 }
109
110 if (fail) leave();
111}
112
113#if 1
114static void compare_ram(void)
115{
116 int i, fail = 0;
117 for (i = 0; i < 0x800/4; i++)
118 {
119 if (((int *)nes_internal_ram)[i] != ((int32 *)RAM)[i]) {
120 int u;
121 fail = 1;
122 for (u = i*4; u < i*4+4; u++)
123 if (nes_internal_ram[u] != RAM[u])
124 printf("RAM[%03x]: %02x vs %02x\n", u, nes_internal_ram[u], RAM[u]);
125 }
126 }
127
128 if (fail) leave();
129}
130#endif
131
132void TriggerIRQ_d(void)
133{
134 printf("-- irq\n");
135 pending_irq |= 0x100;
136}
137
138void TriggerNMI_d(void)
139{
140 printf("-- nmi\n");
141 TriggerNMI_c();
142 TriggerNMI_a();
143 compare_state();
144}
145
146void TriggerNMINSF_d(void)
147{
148}
149
150void X6502_Run_d(int32 c)
151{
152 int32 cycles = c << 4; /* *16 */
153 if (PAL) cycles -= c; /* *15 */
154
155 //printf("-- %06i: run(%i)\n", (int)g_cnt, (int)c);
156 g_cnt += cycles;
157
158 if (framecount != framecount_d) {
159 compare_ram();
160 framecount_d = framecount;
161 }
162
163 timestamp_a = timestamp;
164
165 while (g_cnt > 0)
166 {
167 if (pending_irq) {
168 if (pending_irq & 0x100) {
169 TriggerIRQ_c();
170 TriggerIRQ_a();
171 }
172 if (pending_irq & 0xff) {
173 TriggerIRQ_c();
174 TriggerIRQ_a();
175 X6502_IRQBegin_c(pending_irq & 0xff);
176 X6502_IRQBegin_a(pending_irq & 0xff);
177 }
178 pending_irq = 0;
179 }
180
181 nes_registers[7]=1<<16;
182 X.count=1;
183
184 dread_count_c = dread_count_a = dwrite_count_c = dwrite_count_a = 0;
185 mapirq_cyc_a = mapirq_cyc_c = 0;
186 //timestamp_a = timestamp;
187
188 X6502_Run_c();
189
190 X6502_Run_a();
191
192 compare_state();
193 g_cnt -= 1 - X.count;
194 if (pending_add_cycles) {
195 g_cnt -= pending_add_cycles*48;
196 //X6502_AddCycles_c(pending_add_cycles);
197 //X6502_AddCycles_a(pending_add_cycles);
198 timestamp += pending_add_cycles;
199 timestamp_a += pending_add_cycles;
200 pending_add_cycles = 0;
201 }
202 if (pending_rebase) {
203 X6502_Rebase_a();
204 pending_rebase = 0;
205 }
206 }
207
208 //printf("-- run_end\n");
209}
210
211void X6502_Reset_d(void)
212{
213 printf("-- reset\n");
214
215 X6502_Reset_c();
216 X6502_Reset_a();
217 compare_state();
218}
219
220void X6502_Power_d(void)
221{
222 printf("-- power\n");
223 if (nes_internal_ram == RAM) printf("nes_internal_ram == RAM!!\n");
224 dread_count_c = dread_count_a = dwrite_count_c = dwrite_count_a = 0;
225 mapirq_cyc_c = mapirq_cyc_a = 0;
226
227 X6502_Power_c();
228 X6502_Power_a();
229 compare_state();
230}
231
232void X6502_AddCycles_d(int x)
233{
234 printf("-- AddCycles(%i|%i)\n", x, x*48);
235
236 pending_add_cycles = x; // *48;
237// printf("can't use this in debug\n");
238// exit(1);
239 //X6502_AddCycles_c(x);
240 //X6502_AddCycles_a(x);
241 //compare_state();
242}
243
244void X6502_IRQBegin_d(int w)
245{
246 printf("-- IRQBegin(%02x)\n", w);
247
248 // X6502_IRQBegin_c(w);
249 // X6502_IRQBegin_a(w);
250 pending_irq |= w;
251}
252
253void X6502_IRQEnd_d(int w)
254{
255 printf("-- IRQEnd(%02x)\n", w);
256
257 X6502_IRQEnd_c(w);
258 X6502_IRQEnd_a(w);
259}
260
261
262void X6502_Rebase_d(void)
263{
264 pending_rebase = 1;
265}
266
267