2 // Dave's Disa 68000 Disassembler
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4 #pragma warning(disable:4115)
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7 #define _CRT_SECURE_NO_WARNINGS
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12 unsigned int DisaPc=0;
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13 char *DisaText=NULL; // Text buffer to write in
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14 static char Tasm[]="bwl?";
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15 static char Comment[64]="";
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16 unsigned short (CPU_CALL *DisaWord)(unsigned int a)=NULL;
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18 static unsigned int DisaLong(unsigned int a)
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21 if (DisaWord==NULL) return d;
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24 d|=DisaWord(a+2)&0xffff;
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28 // Get text version of the effective address
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29 int DisaGetEa(char *t,int ea,int size)
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32 if ((ea&0x38)==0x00) { sprintf(t,"d%d",ea ); return 0; } // 000rrr
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33 if ((ea&0x38)==0x08) { sprintf(t,"a%d",ea&7); return 0; } // 001rrr
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34 if ((ea&0x38)==0x10) { sprintf(t,"(a%d)",ea&7); return 0; } // 010rrr
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35 if ((ea&0x38)==0x18) { sprintf(t,"(a%d)+",ea&7); return 0; } // 011rrr
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36 if ((ea&0x38)==0x20) { sprintf(t,"-(a%d)",ea&7); return 0; } // 100rrr
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37 if ((ea&0x38)==0x28) { sprintf(t,"($%x,a%d)",DisaWord(DisaPc)&0xffff,ea&7); DisaPc+=2; return 0; } // 101rrr
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39 if ((ea&0x38)==0x30)
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41 // 110nnn - An + Disp + D/An
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42 int areg=0,ext=0,off=0,da=0,reg=0,wol=0,scale=0;
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43 ext=DisaWord(DisaPc)&0xffff;
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46 off=ext&0xff; da =ext&0x8000?'a':'d';
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47 reg=(ext>>12)&7; wol=ext&0x0800?'l':'w';
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48 scale=1<<((ext>>9)&3);
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50 if (scale<2) sprintf(t,"($%x,a%d,%c%d.%c)", off,areg,da,reg,wol);
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51 else sprintf(t,"($%x,a%d,%c%d.%c*%d)",off,areg,da,reg,wol,scale); // 68020
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57 if (ea==0x38) { sprintf(t,"$%x.w",DisaWord(DisaPc)&0xffff); DisaPc+=2; return 0; } // 111000 - Absolute short
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58 if (ea==0x39) { sprintf(t,"$%x.l",DisaLong(DisaPc)); DisaPc+=4; return 0; } // 111001 - Absolute long
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62 // 111010 - PC Relative
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63 int ext=DisaWord(DisaPc)&0xffff;
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64 sprintf(t,"($%x,pc)",ext);
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65 sprintf(Comment,"; =%x",DisaPc+(short)ext); // Comment where pc+ext is
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72 // 111011 - PC Relative + D/An
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73 int ext=0,off=0,da=0,reg=0,wol=0,scale=0;
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74 ext=DisaWord(DisaPc)&0xffff;
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76 off=ext&0xff; da =ext&0x8000?'a':'d';
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77 reg=(ext>>12)&7; wol=ext&0x0800?'l':'w';
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78 scale=1<<((ext>>9)&3);
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80 if (scale<2) sprintf(t,"($%x,pc,%c%d.%c)", off,da,reg,wol);
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81 else sprintf(t,"($%x,pc,%c%d.%c*%d)",off,da,reg,wol,scale); // 68020
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83 sprintf(Comment,"; =%x",DisaPc+(char)off); // Comment where pc+ext is
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90 // 111100 - Immediate
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93 case 0: sprintf(t,"#$%x",DisaWord(DisaPc)&0x00ff); DisaPc+=2; return 0;
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94 case 1: sprintf(t,"#$%x",DisaWord(DisaPc)&0xffff); DisaPc+=2; return 0;
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95 case 2: sprintf(t,"#$%x",DisaLong(DisaPc) ); DisaPc+=4; return 0;
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100 // Unknown effective address
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101 sprintf(t,"ea=(%d%d%d %d%d%d)",
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102 (ea>>5)&1,(ea>>4)&1,(ea>>3)&1,
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103 (ea>>2)&1,(ea>>1)&1, ea &1);
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107 static void GetOffset(char *text)
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109 int off=(short)DisaWord(DisaPc); DisaPc+=2;
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111 if (off<0) sprintf(text,"-$%x",-off);
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112 else sprintf(text,"$%x", off);
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115 // ================ Opcodes 0x0000+ ================
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116 static int DisaArithImm(int op)
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118 // Or/And/Sub/Add/Eor/Cmp Immediate 0000ttt0 xxDDDddd (tt=type, xx=size extension, DDDddd=Dest ea)
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120 char seat[64]="",deat[64]="";
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122 char *arith[8]={"or","and","sub","add","?","eor","cmp","?"};
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124 type=(op>>9)&7; if (type==4 || type>=7) return 1;
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125 size=(op>>6)&3; if (size>=3) return 1;
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126 dea=op&0x3f; if (dea==0x3c) return 1;
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128 DisaGetEa(seat,0x3c,size);
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129 DisaGetEa(deat,dea, size);
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131 sprintf(DisaText,"%si.%c %s, %s",arith[type],Tasm[size],seat,deat);
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135 // ================ Opcodes 0x0108+ ================
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136 static int DisaMovep(int op)
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138 // movep.x (Aa),Dn - 0000nnn1 dx001aaa nn
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139 int dn=0,dir=0,size=0,an=0;
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140 char offset[32]="";
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144 size=(op>>6)&1; size++;
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148 if (dir) sprintf(DisaText,"movep.%c d%d, (%s,a%d)",Tasm[size],dn,offset,an);
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149 else sprintf(DisaText,"movep.%c (%s,a%d), d%d",Tasm[size],offset,an,dn);
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154 // ================ Opcodes 0x007c+ ================
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155 static int DisaArithSr(int op)
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157 // Ori/Andi/Eori $nnnn,sr 0000t0tx 0s111100
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158 char *opcode[6]={"ori","andi","","","","eori"};
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165 DisaGetEa(seat,0x3c,size);
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166 sprintf(DisaText,"%s.%c %s, %s", opcode[type], Tasm[size], seat, size?"sr":"ccr");
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171 // ================ Opcodes 0x0100+ ================
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172 static int DisaBtstReg(int op)
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174 // Btst/Bchg/Bclr/Bset 0000nnn1 tteeeeee (nn=reg number, eeeeee=Dest ea)
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177 char seat[64]="",deat[64]="";
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178 char *opcode[4]={"btst","bchg","bclr","bset"};
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184 if ((dea&0x38)==0x08) return 1; // movep
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185 DisaGetEa(seat,sea,0);
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186 DisaGetEa(deat,dea,0);
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188 sprintf(DisaText,"%s %s, %s",opcode[type],seat,deat);
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192 // ================ Opcodes 0x0800+ ================
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193 static int DisaBtstImm(int op)
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195 // Btst/Bchg/Bclr/Bset 00001000 tteeeeee 00 nn (eeeeee=ea, nn=bit number)
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197 char seat[64]="",deat[64]="";
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198 char *opcode[4]={"btst","bchg","bclr","bset"};
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201 DisaGetEa(seat, 0x3c,0);
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202 DisaGetEa(deat,op&0x3f,0);
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204 sprintf(DisaText,"%s %s, %s",opcode[type],seat,deat);
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208 // ================ Opcodes 0x1000+ ================
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209 static int DisaMove(int op)
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211 // Move 00xxdddD DDssssss (xx=size extension, ssssss=Source EA, DDDddd=Dest ea)
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213 char inst[64]="",seat[64]="",deat[64]="";
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217 if ((op&0x01c0)==0x0040) movea="a"; // See if it's a movea opcode
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219 // Find size extension
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222 case 0x1000: size=0; break;
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223 case 0x3000: size=1; break;
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224 case 0x2000: size=2; break;
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229 DisaGetEa(seat,sea,size);
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231 dea =(op&0x01c0)>>3;
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232 dea|=(op&0x0e00)>>9;
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233 DisaGetEa(deat,dea,size);
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235 sprintf(inst,"move%s.%c",movea,Tasm[size]);
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236 sprintf(DisaText,"%s %s, %s",inst,seat,deat);
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240 // ================ Opcodes 0x4000+ ================
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241 static int DisaNeg(int op)
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243 // 01000tt0 xxeeeeee (tt=negx/clr/neg/not, xx=size, eeeeee=EA)
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246 char *opcode[4]={"negx","clr","neg","not"};
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249 size=(op>>6)&3; if (size>=3) return 1;
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250 DisaGetEa(eat,op&0x3f,size);
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252 sprintf(DisaText,"%s.%c %s",opcode[type],Tasm[size],eat);
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256 // ================ Opcodes 0x40c0+ ================
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257 static int DisaMoveSr(int op)
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259 // 01000tt0 11eeeeee (tt=type, xx=size, eeeeee=EA)
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265 DisaGetEa(eat,ea,1);
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269 default: sprintf(DisaText,"move sr, %s", eat); break;
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270 case 1: sprintf(DisaText,"move ccr, %s",eat); break;
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271 case 2: sprintf(DisaText,"move %s, ccr",eat); break;
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272 case 3: sprintf(DisaText,"move %s, sr", eat); break;
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277 // ================ Opcodes 0x41c0+ ================
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278 static int DisaLea(int op)
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280 // Lea 0100nnn1 11eeeeee (eeeeee=ea)
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282 char seat[64]="",deat[64]="";
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285 DisaGetEa(seat,sea,0);
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287 dea=(op>>9)&7; dea|=8;
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288 DisaGetEa(deat,dea,2);
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290 sprintf(DisaText,"lea %s, %s",seat,deat);
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294 static int MakeRegList(char *list,int mask,int ea)
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296 int reverse=0,i=0,low=0,len=0;
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298 if ((ea&0x38)==0x20) reverse=1; // -(An), bitfield is reversed
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300 mask&=0xffff; list[0]=0;
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307 if (reverse) bit=0x8000>>i; else bit=1<<i;
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310 if (bit==0 || i==8)
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312 // low to i-1 are a continuous section, add it:
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314 int ad=low&8?'a':'d';
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315 if (low==i-1) sprintf(add,"%c%d/", ad,low&7);
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316 if (low< i-1) sprintf(add,"%c%d-%c%d/",ad,low&7, ad,(i-1)&7);
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319 low=i; // Next section
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322 if (bit==0) low=i+1;
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325 // Knock off trailing '/'
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327 if (len>0) if (list[len-1]=='/') list[len-1]=0;
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331 // ================ Opcodes 0x4840+ ================
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332 static int DisaSwap(int op)
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334 // Swap, 01001000 01000nnn swap Dn
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335 sprintf(DisaText,"swap d%d",op&7);
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339 // ================ Opcodes 0x4850+ ================
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340 static int DisaPea(int op)
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342 // Pea 01001000 01eeeeee (eeeeee=ea) pea
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346 ea=op&0x003f; if (ea<0x10) return 1; // swap opcode
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347 DisaGetEa(eat,ea,2);
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349 sprintf(DisaText,"pea %s",eat);
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353 // ================ Opcodes 0x4880+ ================
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354 static int DisaExt(int op)
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356 // Ext 01001000 1x000nnn (x=size, eeeeee=EA)
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360 size=(op>>6)&1; size++;
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361 DisaGetEa(eat,op&0x3f,size);
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363 sprintf(DisaText,"ext.%c %s",Tasm[size],eat);
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367 // ================ Opcodes 0x4890+ ================
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368 static int DisaMovem(int op)
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370 // Movem 01001d00 1xeeeeee regmask d=direction, x=size, eeeeee=EA
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373 char list[64]="",eat[64]="";
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376 size=((op>>6)&1)+1;
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377 ea=op&0x3f; if (ea<0x10) return 1; // ext opcode
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379 mask=DisaWord(DisaPc)&0xffff; DisaPc+=2;
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381 MakeRegList(list,mask,ea); // Turn register mask into text
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382 DisaGetEa(eat,ea,size);
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384 if (dir) sprintf(DisaText,"movem.%c %s, %s",Tasm[size],eat,list);
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385 else sprintf(DisaText,"movem.%c %s, %s",Tasm[size],list,eat);
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389 // ================ Opcodes 0x4e40+ ================
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390 static int DisaTrap(int op)
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392 sprintf(DisaText,"trap #%d",op&0xf);
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396 // ================ Opcodes 0x4e50+ ================
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397 static int DisaLink(int op)
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399 // Link opcode, 01001110 01010nnn dd link An,#offset
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401 char offset[32]="";
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403 DisaGetEa(eat,(op&7)|8,0);
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406 sprintf(DisaText,"link %s,#%s",eat,offset);
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411 // ================ Opcodes 0x4e58+ ================
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412 static int DisaUnlk(int op)
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414 // Link opcode, 01001110 01011nnn dd unlk An
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417 DisaGetEa(eat,(op&7)|8,0);
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418 sprintf(DisaText,"unlk %s",eat);
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423 // ================ Opcodes 0x4e60+ ================
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424 static int DisaMoveUsp(int op)
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426 // Move USP opcode, 01001110 0110dnnn move An to/from USP (d=direction)
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432 DisaGetEa(eat,ea,0);
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434 if (dir) sprintf(DisaText,"move usp, %s",eat);
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435 else sprintf(DisaText,"move %s, usp",eat);
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439 // ================ Opcodes 0x4e70+ ================
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440 static int Disa4E70(int op)
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442 char *inst[8]={"reset","nop","stop","rte","rtd","rts","trapv","rtr"};
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447 sprintf(DisaText,"%s",inst[n]);
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449 //todo - 'stop' with 16 bit data
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454 // ================ Opcodes 0x4a00+ ================
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455 static int DisaTst(int op)
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457 // Tst 01001010 xxeeeeee (eeeeee=ea)
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463 DisaGetEa(eat,ea,0);
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464 size=(op>>6)&3; if (size>=3) return 1;
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466 sprintf(DisaText,"tst.%c %s",Tasm[size],eat);
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470 // ================ Opcodes 0x4e80+ ================
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471 static int DisaJsr(int op)
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473 // Jsr/Jmp 0100 1110 1mEE Eeee (eeeeee=ea m=1=jmp)
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478 DisaGetEa(seat,sea,0);
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480 sprintf(DisaText,"j%s %s", op&0x40?"mp":"sr", seat);
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484 // ================ Opcodes 0x5000+ ================
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485 static int DisaAddq(int op)
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487 // 0101nnnt xxeeeeee (nnn=#8,1-7 t=addq/subq xx=size, eeeeee=EA)
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488 int num=0,type=0,size=0,ea=0;
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491 num =(op>>9)&7; if (num==0) num=8;
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493 size=(op>>6)&3; if (size>=3) return 1;
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496 DisaGetEa(eat,ea,size);
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498 sprintf(DisaText,"%s.%c #%d, %s",type?"subq":"addq",Tasm[size],num,eat);
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502 // ================ Opcodes 0x50c0+ ================
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503 static int DisaSet(int op)
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505 // 0101cccc 11eeeeee (sxx ea)
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506 static char *cond[16]=
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507 {"t" ,"f", "hi","ls","cc","cs","ne","eq",
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508 "vc","vs","pl","mi","ge","lt","gt","le"};
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513 cc=cond[(op>>8)&0xf]; // Get condition code
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515 if ((ea&0x38)==0x08) return 1; // dbra, not scc
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517 DisaGetEa(eat,ea,0);
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518 sprintf(DisaText,"s%s %s",cc,eat);
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522 // ================ Opcodes 0x50c8+ ================
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523 static int DisaDbra(int op)
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525 // 0101cccc 11001nnn offset (dbra/dbxx Rn,offset)
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526 int dea=0; char deat[64]="";
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529 static char *BraCode[16]=
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530 {"bt" ,"bra","bhi","bls","bcc","bcs","bne","beq",
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531 "bvc","bvs","bpl","bmi","bge","blt","bgt","ble"};
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535 DisaGetEa(deat,dea,2);
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537 // Get condition code
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538 Bra=BraCode[(op>>8)&0xf];
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542 Offset=(short)DisaWord(DisaPc); DisaPc+=2;
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544 sprintf(DisaText,"d%s %s, %x",Bra,deat,pc+Offset);
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548 // ================ Opcodes 0x6000+ ================
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549 static int DisaBranch(int op)
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551 // Branch 0110cccc nn (cccc=condition)
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554 static char *BraCode[16]=
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555 {"bra","bsr","bhi","bls","bcc","bcs","bne","beq",
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556 "bvc","bvs","bpl","bmi","bge","blt","bgt","ble"};
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559 // Get condition code
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560 Bra=BraCode[(op>>8)&0x0f];
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564 Offset=(char)(op&0xff);
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565 if (Offset== 0) { Offset=(short)DisaWord(DisaPc); DisaPc+=2; }
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566 else if (Offset==-1) { Offset= DisaLong(DisaPc); DisaPc+=4; }
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568 sprintf(DisaText,"%s %x",Bra,pc+Offset);
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572 // ================ Opcodes 0x7000+ ================
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573 static int DisaMoveq(int op)
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575 // Moveq 0111rrr0 nn (rrr=Dest register, nn=data)
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577 int dea=0; char deat[64]="";
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578 char *inst="moveq";
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582 DisaGetEa(deat,dea,2);
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584 val=(char)(op&0xff);
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585 sprintf(DisaText,"%s #$%x, %s",inst,val,deat);
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589 // ================ Opcodes 0x8000+ ================
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590 static int DisaArithReg(int op)
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592 // 1t0tnnnd xxeeeeee (tt=type:or/sub/and/add xx=size, eeeeee=EA)
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593 int type=0,size=0,dir=0,rea=0,ea=0;
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594 char reat[64]="",eat[64]="";
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595 char *opcode[]={"or","sub","","","and","add"};
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600 size=(op>> 6)&3; if (size>=3) return 1;
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603 if (dir && ea<0x10) return 1; // addx opcode
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605 DisaGetEa(reat,rea,size);
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606 DisaGetEa( eat, ea,size);
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608 if (dir) sprintf(DisaText,"%s.%c %s, %s",opcode[type],Tasm[size],reat,eat);
\r
609 else sprintf(DisaText,"%s.%c %s, %s",opcode[type],Tasm[size],eat,reat);
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613 // ================ Opcodes 0x8100+ ================
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614 static int DisaAbcd(int op)
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616 // 1t00ddd1 0000asss - sbcd/abcd Ds,Dd or -(As),-(Ad)
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618 int dn=0,addr=0,sn=0;
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619 char *opcode[]={"sbcd","abcd"};
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626 if (addr) sprintf(DisaText,"%s -(a%d), -(a%d)",opcode[type],sn,dn);
\r
627 else sprintf(DisaText,"%s d%d, d%d", opcode[type],sn,dn);
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632 // ================ Opcodes 0x80c0+ ================
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633 static int DisaMul(int op)
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635 // Div/Mul: 1m00nnns 11eeeeee (m=Mul, nnn=Register Dn, s=signed, eeeeee=EA)
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636 int type=0,rea=0,sign=0,ea=0,size=1;
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637 char reat[64]="",eat[64]="";
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638 char *opcode[2]={"div","mul"};
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640 type=(op>>14)&1; // div/mul
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645 DisaGetEa(reat,rea,size);
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646 DisaGetEa( eat, ea,size);
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648 sprintf(DisaText,"%s%c.%c %s, %s",opcode[type],sign?'s':'u',Tasm[size],eat,reat);
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652 // ================ Opcodes 0x90c0+ ================
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653 static int DisaAritha(int op)
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655 // Suba/Cmpa/Adda 1tt1nnnx 11eeeeee (tt=type, x=size, eeeeee=Source EA)
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656 int type=0,size=0,sea=0,dea=0;
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657 char seat[64]="",deat[64]="";
\r
658 char *aritha[4]={"suba","cmpa","adda",""};
\r
660 type=(op>>13)&3; if (type>=3) return 1;
\r
661 size=(op>>8)&1; size++;
\r
662 dea =(op>>9)&7; dea|=8; // Dest=An
\r
663 sea = op&0x003f; // Source
\r
665 DisaGetEa(seat,sea,size);
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666 DisaGetEa(deat,dea,size);
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668 sprintf(DisaText,"%s.%c %s, %s",aritha[type],Tasm[size],seat,deat);
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672 // ================ Opcodes 0xb000+ ================
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673 static int DisaCmpEor(int op)
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675 // Cmp/Eor 1011rrrt xxeeeeee (rrr=Dn, t=cmp/eor, xx=size extension, eeeeee=ea)
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676 char reat[64]="",eat[64]="";
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680 size=(op>>6)&3; if (size>=3) return 1; // cmpa opcode
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681 if ((op&0xf138)==0xb108) return 1; // cmpm opcode
\r
683 DisaGetEa(reat,(op>>9)&7,size);
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684 DisaGetEa(eat, op&0x3f, size);
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686 if (type) sprintf(DisaText,"eor.%c %s, %s",Tasm[size],reat,eat);
\r
687 else sprintf(DisaText,"cmp.%c %s, %s",Tasm[size],eat,reat);
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691 // ================ Opcodes 0xb108+ ================
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692 static int DisaCmpm(int op)
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694 // Cmpm 1011ddd1 xx001sss
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695 int type=0,size=0,dea=0,sea=0;
\r
696 char deat[64]="",seat[64]="";
\r
699 dea =(op>> 9)&7; dea|=8;
\r
700 size=(op>> 6)&3; if (size>=3) return 1;
\r
703 DisaGetEa(deat,dea,size);
\r
704 DisaGetEa(seat,sea,size);
\r
706 sprintf(DisaText,"cmpm.%c (%s)+, (%s)+",Tasm[size],seat,deat);
\r
711 // ================ Opcodes 0xc140+ ================
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712 // 1100ttt1 01000sss exg ds,dt
\r
713 // 1100ttt1 01001sss exg as,at
\r
714 // 1100ttt1 10001sss exg as,dt
\r
715 static int DisaExg(int op)
\r
717 int tr=0,type=0,sr=0;
\r
723 if (type==0x40) sprintf(DisaText,"exg d%d, d%d",sr,tr);
\r
724 else if (type==0x48) sprintf(DisaText,"exg a%d, a%d",sr,tr);
\r
725 else if (type==0x88) sprintf(DisaText,"exg a%d, d%d",sr,tr);
\r
731 // ================ Opcodes 0xd100+ ================
\r
732 static int DisaAddx(int op)
\r
734 // 1t01ddd1 xx000sss addx
\r
735 int type=0,size=0,dea=0,sea=0;
\r
736 char deat[64]="",seat[64]="";
\r
737 char *opcode[6]={"","subx","","","","addx"};
\r
741 size=(op>> 6)&3; if (size>=3) return 1;
\r
744 DisaGetEa(deat,dea,size);
\r
745 DisaGetEa(seat,sea,size);
\r
747 sprintf(DisaText,"%s.%c %s, %s",opcode[type],Tasm[size],seat,deat);
\r
751 // ================ Opcodes 0xe000+ ================
\r
752 static char *AsrName[4]={"as","ls","rox","ro"};
\r
753 static int DisaAsr(int op)
\r
755 // Asr/l/Ror/l etc - 1110cccd xxuttnnn
\r
756 // (ccc=count, d=direction xx=size extension, u=use reg for count, tt=type, nnn=register Dn)
\r
757 int count=0,dir=0,size=0,usereg=0,type=0,num=0;
\r
761 size =(op>>6)&3; if (size>=3) return 1; // todo Asr EA
\r
764 num = op &7; // Register number
\r
766 if (usereg==0) count=((count-1)&7)+1; // because ccc=000 means 8
\r
768 sprintf(DisaText,"%s%c.%c %c%d, d%d",
\r
769 AsrName[type], dir?'l':'r', Tasm[size],
\r
770 usereg?'d':'#', count, num);
\r
774 static int DisaAsrEa(int op)
\r
776 // Asr/l/Ror/l etc EA - 11100ttd 11eeeeee
\r
777 int type=0,dir=0,size=1;
\r
782 DisaGetEa(eat,op&0x3f,size);
\r
784 sprintf(DisaText,"%s%c.w %s", AsrName[type], dir?'l':'r', eat);
\r
788 // =================================================================
\r
790 static int TryOp(int op)
\r
792 if ((op&0xf100)==0x0000) DisaArithImm(op); // Ori/And/Sub/Add/Eor/Cmp Immediate
\r
793 if ((op&0xf5bf)==0x003c) DisaArithSr(op); // Ori/Andi/Eori $nnnn,sr
\r
794 if ((op&0xf100)==0x0100) DisaBtstReg(op);
\r
795 if ((op&0xf138)==0x0108) DisaMovep(op);
\r
796 if ((op&0xff00)==0x0800) DisaBtstImm(op); // Btst/Bchg/Bclr/Bset
\r
797 if ((op&0xc000)==0x0000) DisaMove(op);
\r
798 if ((op&0xf900)==0x4000) DisaNeg(op); // Negx/Clr/Neg/Not
\r
799 if ((op&0xf1c0)==0x41c0) DisaLea(op);
\r
800 if ((op&0xf9c0)==0x40c0) DisaMoveSr(op);
\r
801 if ((op&0xfff8)==0x4840) DisaSwap(op);
\r
802 if ((op&0xffc0)==0x4840) DisaPea(op);
\r
803 if ((op&0xffb8)==0x4880) DisaExt(op);
\r
804 if ((op&0xfb80)==0x4880) DisaMovem(op);
\r
805 if ((op&0xff00)==0x4a00) DisaTst(op);
\r
806 if ((op&0xfff0)==0x4e40) DisaTrap(op);
\r
807 if ((op&0xfff8)==0x4e50) DisaLink(op);
\r
808 if ((op&0xfff8)==0x4e58) DisaUnlk(op);
\r
809 if ((op&0xfff0)==0x4e60) DisaMoveUsp(op);
\r
810 if ((op&0xfff8)==0x4e70) Disa4E70(op);
\r
811 if ((op&0xff80)==0x4e80) DisaJsr(op);
\r
812 if ((op&0xf000)==0x5000) DisaAddq(op);
\r
813 if ((op&0xf0c0)==0x50c0) DisaSet(op);
\r
814 if ((op&0xf0f8)==0x50c8) DisaDbra(op);
\r
815 if ((op&0xf000)==0x6000) DisaBranch(op);
\r
816 if ((op&0xa000)==0x8000) DisaArithReg(op); // Or/Sub/And/Add
\r
817 if ((op&0xb1f0)==0x8100) DisaAbcd(op);
\r
818 if ((op&0xb130)==0x9100) DisaAddx(op);
\r
819 if ((op&0xb0c0)==0x80c0) DisaMul(op);
\r
820 if ((op&0xf100)==0x7000) DisaMoveq(op);
\r
821 if ((op&0x90c0)==0x90c0) DisaAritha(op);
\r
822 if ((op&0xf000)==0xb000) DisaCmpEor(op);
\r
823 if ((op&0xf138)==0xb108) DisaCmpm(op);
\r
824 if ((op&0xf130)==0xc100) DisaExg(op);
\r
825 if ((op&0xf000)==0xe000) DisaAsr(op);
\r
826 if ((op&0xf8c0)==0xe0c0) DisaAsrEa(op);
\r
835 if (DisaWord==NULL) return 1;
\r
838 DisaText[0]=0; // Assume opcode unknown
\r
840 op=DisaWord(DisaPc)&0xffff; DisaPc+=2;
\r
842 strcat(DisaText,Comment);
\r