projects / avrcpm.git / blame
| Commit | Line | Data |
|---|---|---|
| f0d2aa0e L |
1 | ; 8080 Interpreter. |
| 2 | ; This is part of the Z80-CP/M emulator written by Sprite_tm. | |
| 3 | ; | |
| 4 | ||
| 5 | ; Copyright (C) 2010 Sprite_tm | |
| 6 | ; Copyright (C) 2010 Leo C. | |
| 7 | ; Copyright (C) 2010 Horst S. | |
| 8 | ||
| 9 | ; This file is part of avrcpm. | |
| 10 | ; | |
| 11 | ; avrcpm is free software: you can redistribute it and/or modify it | |
| 12 | ; under the terms of the GNU General Public License as published by | |
| 13 | ; the Free Software Foundation, either version 3 of the License, or | |
| 14 | ; (at your option) any later version. | |
| 15 | ; | |
| 16 | ; avrcpm is distributed in the hope that it will be useful, | |
| 17 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 18 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 19 | ; GNU General Public License for more details. | |
| 20 | ; | |
| 21 | ; You should have received a copy of the GNU General Public License | |
| 22 | ; along with avrcpm. If not, see <http://www.gnu.org/licenses/>. | |
| 23 | ; | |
| 24 | ; $Id$ | |
| 25 | ; | |
| 26 | ||
| 27 | ||
| 28 | .dseg | |
| 29 | ||
| 30 | z_b: .byte 1 | |
| 31 | z_c: .byte 1 | |
| 32 | z_d: .byte 1 | |
| 33 | z_e: .byte 1 | |
| 34 | z_h: .byte 1 | |
| 35 | z_l: .byte 1 | |
| 36 | ||
| 37 | ||
| 38 | .cseg | |
| 39 | ||
| 40 | ;Init z80 | |
| 41 | z80_init: | |
| 42 | ldi z_pcl,low (IPLADDR) | |
| 43 | ldi z_pch,high(IPLADDR) | |
| 44 | ||
| 45 | cbi flags,trace | |
| 46 | printnewline | |
| 47 | printstring "Ok, CPU is live!" | |
| 48 | printnewline | |
| 49 | ||
| 50 | ;---------------------------------------------------------- | |
| 51 | ; 1 2 3 4 | |
| 52 | ;.db (low)do_store (low)do_op (hihg)do_op (low)do_fetch | |
| 53 | ; | |
| 54 | ;das kommt auf den stapel | |
| 55 | ; main da solls zum schluss weitergehen | |
| 56 | ;do_store wohin damit beenden mit RET | |
| 57 | ;do_op was tun beenden mit RET | |
| 58 | ; | |
| 59 | ;das wird direkt angesprungen | |
| 60 | ;do_fetch woher beenden mit RET | |
| 61 | ; | |
| 62 | ; | |
| 63 | main: | |
| 64 | .if INS_DEBUG | |
| 65 | cbi flags,trace | |
| 66 | cpi z_pch,DBG_TRACE_BOTTOM | |
| 67 | brlo notraceon | |
| 68 | cpi z_pch,DBG_TRACE_TOP | |
| 69 | brsh notraceon | |
| 70 | sbi flags,trace | |
| 71 | notraceon: | |
| 72 | .endif | |
| 73 | ||
| 74 | ||
| 75 | .if PRINT_PC | |
| 76 | cpi z_pch,DBG_TRACE_BOTTOM | |
| 77 | brlo noprintpc | |
| 78 | cpi z_pch,DBG_TRACE_TOP | |
| 79 | brsh noprintpc | |
| 80 | ||
| 81 | printnewline | |
| 82 | printstring "PC=" | |
| 83 | movw temp,z_pcl | |
| 84 | rcall printhexw | |
| 85 | printstring " " | |
| 86 | noprintpc: | |
| 87 | .endif | |
| 88 | ||
| 89 | .if INS_DEBUG | |
| 90 | sbic flags,trace | |
| 91 | rcall printregs | |
| 92 | .endif | |
| 93 | ||
| 94 | ;hier kommt die Interruptbehandlung rein | |
| 95 | ||
| 96 | ldi zl,low(main) ;da will ich wieder hin. | |
| 97 | ldi zh,high(main) ; | |
| 98 | push zl ; | |
| 99 | push zh ; | |
| 100 | mem_read_s z_pc ;temp=memReadByte(z_pc) | |
| 101 | adiw z_pcl,1 ;++z_pc | |
| 102 | ldi zl,low(todo_table*2) ;zhl=todo_table | |
| 103 | ldi zh,high(todo_table*2) ; | |
| 104 | ldi temp2,3 ;1 | |
| 105 | mul temp,temp2 ;2 | |
| 106 | add zl,r0 ;1 | |
| 107 | adc zh,r1 ;1 | |
| 108 | ||
| 109 | ldi temp2,high(store_ops) ; | |
| 110 | lpm temp,Z+ ;do_store | |
| 111 | push temp ; low | |
| 112 | push temp2 ; high | |
| 113 | ||
| 114 | .if high(opjumps) != high(opjumps) | |
| 115 | ldi temp2,high(opjumps) | |
| 116 | .endif | |
| 117 | lpm temp,Z+ ;do_op | |
| 118 | push temp ; low | |
| 119 | push temp2 ; high | |
| 120 | ||
| 121 | lpm zl,Z ;do_fetch | |
| 122 | ldi zh,high(fetch_ops) | |
| 123 | ijmp ;direkt | |
| 124 | ||
| 125 | ||
| 126 | ; .listmac | |
| 127 | ;----------------------------------------------------- | |
| 128 | ; Generate jump to target and position in table | |
| 129 | ; gen_opjmp target | |
| 130 | ; | |
| 131 | .macro gen_opjmp | |
| 132 | .ifndef opjmp_table_pos_ | |
| 133 | .set opjmp_table_page_ = high(PC) | |
| 134 | .set opjmp_table_pos_ = PC | |
| 135 | .endif | |
| 136 | .equ @0 = low(opjmp_table_pos_) | |
| 137 | .set opjmp_table_pos_ = opjmp_table_pos_ + 1 | |
| 138 | .if high(opjmp_table_pos_) != opjmp_table_page_ | |
| 139 | .warning "Table 'opjump' crosses page boarder." | |
| 140 | .message "Program will not work, unless the opjump table is relocated." | |
| 141 | .endif | |
| 142 | rjmp do_@0 | |
| 143 | .endm | |
| 144 | ||
| 145 | ;-------------------------------------------------- | |
| 146 | ; Generate a table entry for one instruction | |
| 147 | ; | |
| 148 | ; instr fetch, op, store | |
| 149 | ; | |
| 150 | .macro instr | |
| 151 | .ifndef inst_table_odd_ | |
| 152 | .set inst_table_odd_ = 0 | |
| 153 | .endif | |
| 154 | ||
| 155 | .if inst_table_odd_ | |
| 156 | .db inst_table_next_, low(@2), @1, low(@0) | |
| 157 | .set inst_table_odd_ = 0 | |
| 158 | .else | |
| 159 | .set inst_table_next_ = low(@0) | |
| 160 | .db low(@2), @1 | |
| 161 | .set inst_table_odd_ = 1 | |
| 162 | .endif | |
| 163 | .endm | |
| 164 | ||
| 165 | ;----------------------------------- | |
| 166 | ; go to op. | |
| 167 | ; | |
| 168 | .macro fetch_end | |
| 169 | ldi zh,high(opjumps) | |
| 170 | mov zl,insdech | |
| 171 | ijmp | |
| 172 | .endm | |
| 173 | ||
| 174 | ;----------------------------------- | |
| 175 | ; go to store. | |
| 176 | ; | |
| 177 | .macro op_end | |
| 178 | ldi zh,high(store_ops) ; | |
| 179 | mov zl,insdecl | |
| 180 | ijmp | |
| 181 | .endm | |
| 182 | ||
| 183 | ;----------------------------------- | |
| 184 | ; go back to main | |
| 185 | ; | |
| 186 | .macro store_end | |
| 187 | rjmp main | |
| 188 | .endm | |
| 189 | ||
| 190 | ;----------------------------------- | |
| 191 | ; go back to main | |
| 192 | ; | |
| 193 | .macro op_end_nojmp | |
| 194 | rjmp main | |
| 195 | .endm | |
| 196 | ||
| 197 | ||
| 198 | ; ------------ Fetch phase stuff ----------------- | |
| 199 | ||
| 200 | .org (PC+255) & 0xff00 ; wichtig !!!fetch und store muessen in einer page liegen | |
| 201 | fetch_ops: | |
| 202 | do_fetch_nop: | |
| 203 | ret | |
| 204 | ||
| 205 | do_fetch_a: | |
| 206 | mov opl,z_a | |
| 207 | ret | |
| 208 | ||
| 209 | do_fetch_b: | |
| 210 | lds opl,z_b | |
| 211 | ret | |
| 212 | ||
| 213 | do_fetch_c: | |
| 214 | lds opl,z_c | |
| 215 | ret | |
| 216 | ||
| 217 | do_fetch_d: | |
| 218 | lds opl,z_d | |
| 219 | ret | |
| 220 | ||
| 221 | do_fetch_e: | |
| 222 | lds opl,z_e | |
| 223 | ret | |
| 224 | ||
| 225 | do_fetch_h: | |
| 226 | lds opl,z_h | |
| 227 | ret | |
| 228 | ||
| 229 | do_fetch_l: | |
| 230 | lds opl,z_l | |
| 231 | ret | |
| 232 | ||
| 233 | do_fetch_af: | |
| 234 | mov opl,z_flags | |
| 235 | mov oph,z_a | |
| 236 | ret | |
| 237 | ||
| 238 | do_fetch_bc: | |
| 239 | lds opl,z_c | |
| 240 | lds oph,z_b | |
| 241 | ret | |
| 242 | ||
| 243 | do_fetch_de: | |
| 244 | lds opl,z_e | |
| 245 | lds oph,z_d | |
| 246 | ret | |
| 247 | ||
| 248 | do_fetch_hl: | |
| 249 | lds opl,z_l | |
| 250 | lds oph,z_h | |
| 251 | ret | |
| 252 | ||
| 253 | do_fetch_sp: | |
| 254 | movw opl,z_spl | |
| 255 | ret | |
| 256 | ||
| 257 | do_fetch_mbc: | |
| 258 | lds xh,z_b | |
| 259 | lds xl,z_c | |
| 260 | mem_read_d opl | |
| 261 | ret | |
| 262 | ||
| 263 | do_fetch_mde: | |
| 264 | lds xh,z_d | |
| 265 | lds xl,z_e | |
| 266 | mem_read_d opl | |
| 267 | ret | |
| 268 | ||
| 269 | do_fetch_mhl: | |
| 270 | lds xh,z_h | |
| 271 | lds xl,z_l | |
| 272 | mem_read_d opl | |
| 273 | ret | |
| 274 | ||
| 275 | do_fetch_msp: | |
| 276 | movw x,z_spl | |
| 277 | mem_read_d opl | |
| 278 | adiw x,1 | |
| 279 | mem_read_d oph | |
| 280 | ret | |
| 281 | ||
| 282 | do_fetch_dir8: | |
| 283 | mem_read_ds opl, z_pc | |
| 284 | adiw z_pcl,1 | |
| 285 | ret | |
| 286 | ||
| 287 | do_fetch_dir16: | |
| 288 | mem_read_ds opl, z_pc | |
| 289 | adiw z_pcl,1 | |
| 290 | mem_read_ds oph, z_pc | |
| 291 | adiw z_pcl,1 | |
| 292 | ret | |
| 293 | ||
| 294 | do_fetch_rst: | |
| 295 | movw x,z_pcl | |
| 296 | sbiw x,1 | |
| 297 | mem_read_d opl | |
| 298 | andi opl,0x38 | |
| 299 | ldi oph,0 | |
| 300 | ret | |
| 301 | ||
| 302 | ; ------------ Store phase stuff ----------------- | |
| 303 | ||
| 304 | .org (PC+255) & 0xff00 ; wichtig !!!fetch und store muessen in einer page liegen | |
| 305 | store_ops: | |
| 306 | do_store_nop: | |
| 307 | ret | |
| 308 | ||
| 309 | do_store_a: | |
| 310 | mov z_a,opl | |
| 311 | ret | |
| 312 | ||
| 313 | do_store_b: | |
| 314 | sts z_b,opl | |
| 315 | ret | |
| 316 | ||
| 317 | do_store_c: | |
| 318 | sts z_c,opl | |
| 319 | ret | |
| 320 | ||
| 321 | do_store_d: | |
| 322 | sts z_d,opl | |
| 323 | ret | |
| 324 | ||
| 325 | do_store_e: | |
| 326 | sts z_e,opl | |
| 327 | ret | |
| 328 | ||
| 329 | do_store_h: | |
| 330 | sts z_h,opl | |
| 331 | ret | |
| 332 | ||
| 333 | do_store_l: | |
| 334 | sts z_l,opl | |
| 335 | ret | |
| 336 | ||
| 337 | do_store_af: | |
| 338 | mov z_a,oph | |
| 339 | mov z_flags,opl | |
| 340 | ret | |
| 341 | ||
| 342 | do_store_bc: | |
| 343 | sts z_b,oph | |
| 344 | sts z_c,opl | |
| 345 | ret | |
| 346 | ||
| 347 | do_store_de: | |
| 348 | sts z_d,oph | |
| 349 | sts z_e,opl | |
| 350 | ret | |
| 351 | ||
| 352 | do_store_hl: | |
| 353 | sts z_h,oph | |
| 354 | sts z_l,opl | |
| 355 | ret | |
| 356 | ||
| 357 | do_store_mbc: | |
| 358 | lds xh,z_b | |
| 359 | lds xl,z_c | |
| 360 | mem_write_s opl | |
| 361 | ret | |
| 362 | ||
| 363 | do_store_mde: | |
| 364 | lds xh,z_d | |
| 365 | lds xl,z_e | |
| 366 | mem_write_s opl | |
| 367 | ret | |
| 368 | ||
| 369 | do_store_mhl: | |
| 370 | lds xh,z_h | |
| 371 | lds xl,z_l | |
| 372 | mem_write_s opl | |
| 373 | ret | |
| 374 | ||
| 375 | do_store_msp: | |
| 376 | movw xl,z_spl | |
| 377 | mem_write_s opl | |
| 378 | adiw xl,1 | |
| 379 | mem_write_s oph | |
| 380 | ret | |
| 381 | ||
| 382 | do_store_sp: | |
| 383 | movw z_spl,opl | |
| 384 | ret | |
| 385 | ||
| 386 | do_store_pc: | |
| 387 | movw z_pcl,opl | |
| 388 | ret | |
| 389 | ||
| 390 | do_store_ret: | |
| 391 | movw x,z_spl | |
| 392 | mem_read_d z_pcl | |
| 393 | adiw x,1 | |
| 394 | mem_read_d z_pch | |
| 395 | adiw x,1 | |
| 396 | movw z_spl,x | |
| 397 | ||
| 398 | .if STACK_DBG | |
| 399 | printnewline | |
| 400 | printstring "Stack pop " | |
| 401 | movw temp,z_pcl | |
| 402 | rcall printhexw | |
| 403 | printstring ", SP is now " | |
| 404 | movw temp,z_spl | |
| 405 | rcall printhexw | |
| 406 | printstring ". " | |
| 407 | .endif | |
| 408 | ret | |
| 409 | ||
| 410 | do_store_call: | |
| 411 | movw xl,z_spl | |
| 412 | sbiw x,1 | |
| 413 | mem_write_s z_pch | |
| 414 | sbiw x,1 | |
| 415 | mem_write_s z_pcl | |
| 416 | movw z_spl,xl | |
| 417 | ||
| 418 | .if STACK_DBG | |
| 419 | printnewline | |
| 420 | printstring "Stack push " | |
| 421 | movw temp,z_pcl | |
| 422 | rcall printhexw | |
| 423 | printstring ", SP is now " | |
| 424 | movw temp,z_spl | |
| 425 | rcall printhexw | |
| 426 | printstring ". " | |
| 427 | .endif | |
| 428 | movw z_pcl,opl | |
| 429 | ret | |
| 430 | ||
| 431 | ||
| 432 | do_store_am: | |
| 433 | mem_write_ds op, z_a | |
| 434 | ret | |
| 435 | ||
| 436 | ; ------------ Operation phase stuff ----------------- | |
| 437 | ||
| 438 | ;.org (PC+255) & 0xff00 | |
| 439 | ||
| 440 | opjumps: | |
| 441 | gen_opjmp op_nop | |
| 442 | gen_opjmp op_inc | |
| 443 | gen_opjmp op_dec | |
| 444 | gen_opjmp op_inc16 | |
| 445 | gen_opjmp op_dec16 | |
| 446 | gen_opjmp op_rlc | |
| 447 | gen_opjmp op_rrc | |
| 448 | gen_opjmp op_rr | |
| 449 | gen_opjmp op_rl | |
| 450 | gen_opjmp op_adda | |
| 451 | gen_opjmp op_adca | |
| 452 | gen_opjmp op_subfa | |
| 453 | gen_opjmp op_sbcfa | |
| 454 | gen_opjmp op_anda | |
| 455 | gen_opjmp op_ora | |
| 456 | gen_opjmp op_xora | |
| 457 | gen_opjmp op_addhl | |
| 458 | gen_opjmp op_sthl | |
| 459 | gen_opjmp op_rmem16 | |
| 460 | gen_opjmp op_rmem8 | |
| 461 | gen_opjmp op_da | |
| 462 | gen_opjmp op_scf | |
| 463 | gen_opjmp op_cpl | |
| 464 | gen_opjmp op_ccf | |
| 465 | gen_opjmp op_pop16 | |
| 466 | gen_opjmp op_push16 | |
| 467 | gen_opjmp op_ifnz | |
| 468 | gen_opjmp op_ifz | |
| 469 | gen_opjmp op_ifnc | |
| 470 | gen_opjmp op_ifc | |
| 471 | gen_opjmp op_ifpo | |
| 472 | gen_opjmp op_ifpe | |
| 473 | gen_opjmp op_ifp | |
| 474 | gen_opjmp op_ifm | |
| 475 | gen_opjmp op_outa | |
| 476 | gen_opjmp op_in | |
| 477 | gen_opjmp op_exhl | |
| 478 | gen_opjmp op_di | |
| 479 | gen_opjmp op_ei | |
| 480 | gen_opjmp op_inv | |
| 481 | gen_opjmp op_cpfa | |
| 482 | gen_opjmp op_inca | |
| 483 | gen_opjmp op_deca | |
| 484 | ||
| 485 | ||
| 486 | ;---------------------------------------------------------------- | |
| 487 | ;| | | |
| 488 | ;| Zilog | | |
| 489 | ;| | | |
| 490 | ;| ZZZZZZZ 88888 000 | | |
| 491 | ;| Z 8 8 0 0 | | |
| 492 | ;| Z 8 8 0 0 0 | | |
| 493 | ;| Z 88888 0 0 0 | | |
| 494 | ;| Z 8 8 0 0 0 | | |
| 495 | ;| Z 8 8 0 0 | | |
| 496 | ;| ZZZZZZZ 88888 000 | | |
| 497 | ;| | | |
| 498 | ;| Z80 MICROPROCESSOR Instruction Set Summary | | |
| 499 | ;| | | |
| 500 | ;---------------------------------------------------------------- | |
| 501 | ;---------------------------------------------------------------- | |
| 502 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 503 | ;|----------+------+---------------------+----------------------| | |
| 504 | ;|ADC A,s |***V0*|Add with Carry |A=A+s+CY | | |
| 505 | ;|ADC HL,ss |**?V0*|Add with Carry |HL=HL+ss+CY | | |
| 506 | ;|ADD A,s |***V0*|Add |A=A+s | | |
| 507 | ;|ADD HL,ss |--?-0*|Add |HL=HL+ss | | |
| 508 | ;|ADD IX,pp |--?-0*|Add |IX=IX+pp | | |
| 509 | ;|ADD IY,rr |--?-0*|Add |IY=IY+rr | | |
| 510 | ;|AND s |**1P00|Logical AND |A=A&s | | |
| 511 | ;|BIT b,m |?*1?0-|Test Bit |m&{2^b} | | |
| 512 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
| 513 | ;|CALL nn |------|Unconditional Call |-[SP]=PC,PC=nn | | |
| 514 | ;|CCF |--?-0*|Complement Carry Flag|CY=~CY | | |
| 515 | ;|CP s |***V1*|Compare |A-s | | |
| 516 | ;|CPD |****1-|Compare and Decrement|A-[HL],HL=HL-1,BC=BC-1| | |
| 517 | ;|CPDR |****1-|Compare, Dec., Repeat|CPD till A=[HL]or BC=0| | |
| 518 | ;|CPI |****1-|Compare and Increment|A-[HL],HL=HL+1,BC=BC-1| | |
| 519 | ;|CPIR |****1-|Compare, Inc., Repeat|CPI till A=[HL]or BC=0| | |
| 520 | ;|CPL |--1-1-|Complement |A=~A | | |
| 521 | ;|DAA |***P-*|Decimal Adjust Acc. |A=BCD format | | |
| 522 | ;|DEC s |***V1-|Decrement |s=s-1 | | |
| 523 | ;|DEC xx |------|Decrement |xx=xx-1 | | |
| 524 | ;|DEC ss |------|Decrement |ss=ss-1 | | |
| 525 | ;|DI |------|Disable Interrupts | | | |
| 526 | ;|DJNZ e |------|Dec., Jump Non-Zero |B=B-1 till B=0 | | |
| 527 | ;|EI |------|Enable Interrupts | | | |
| 528 | ;|EX [SP],HL|------|Exchange |[SP]<->HL | | |
| 529 | ;|EX [SP],xx|------|Exchange |[SP]<->xx | | |
| 530 | ;|EX AF,AF' |------|Exchange |AF<->AF' | | |
| 531 | ;|EX DE,HL |------|Exchange |DE<->HL | | |
| 532 | ;|EXX |------|Exchange |qq<->qq' (except AF)| | |
| 533 | ;|HALT |------|Halt | | | |
| 534 | ;|IM n |------|Interrupt Mode | (n=0,1,2)| | |
| 535 | ;|IN A,[n] |------|Input |A=[n] | | |
| 536 | ;|IN r,[C] |***P0-|Input |r=[C] | | |
| 537 | ;|INC r |***V0-|Increment |r=r+1 | | |
| 538 | ;|INC [HL] |***V0-|Increment |[HL]=[HL]+1 | | |
| 539 | ;|INC xx |------|Increment |xx=xx+1 | | |
| 540 | ;|INC [xx+d]|***V0-|Increment |[xx+d]=[xx+d]+1 | | |
| 541 | ;|INC ss |------|Increment |ss=ss+1 | | |
| 542 | ;|IND |?*??1-|Input and Decrement |[HL]=[C],HL=HL-1,B=B-1| | |
| 543 | ;|INDR |?1??1-|Input, Dec., Repeat |IND till B=0 | | |
| 544 | ;|INI |?*??1-|Input and Increment |[HL]=[C],HL=HL+1,B=B-1| | |
| 545 | ;|INIR |?1??1-|Input, Inc., Repeat |INI till B=0 | | |
| 546 | ;|JP [HL] |------|Unconditional Jump |PC=[HL] | | |
| 547 | ;|JP [xx] |------|Unconditional Jump |PC=[xx] | | |
| 548 | ;|JP nn |------|Unconditional Jump |PC=nn | | |
| 549 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
| 550 | ;|JR e |------|Unconditional Jump |PC=PC+e | | |
| 551 | ;|JR cc,e |------|Conditional Jump |If cc JR(cc=C,NC,NZ,Z)| | |
| 552 | ;|LD dst,src|------|Load |dst=src | | |
| 553 | ;|LD A,i |**0*0-|Load |A=i (i=I,R)| | |
| 554 | ;|LDD |--0*0-|Load and Decrement |[DE]=[HL],HL=HL-1,# | | |
| 555 | ;|LDDR |--000-|Load, Dec., Repeat |LDD till BC=0 | | |
| 556 | ;|LDI |--0*0-|Load and Increment |[DE]=[HL],HL=HL+1,# | | |
| 557 | ;|LDIR |--000-|Load, Inc., Repeat |LDI till BC=0 | | |
| 558 | ;|NEG |***V1*|Negate |A=-A | | |
| 559 | ;|NOP |------|No Operation | | | |
| 560 | ;|OR s |**0P00|Logical inclusive OR |A=Avs | | |
| 561 | ;|OTDR |?1??1-|Output, Dec., Repeat |OUTD till B=0 | | |
| 562 | ;|OTIR |?1??1-|Output, Inc., Repeat |OUTI till B=0 | | |
| 563 | ;|OUT [C],r |------|Output |[C]=r | | |
| 564 | ;|OUT [n],A |------|Output |[n]=A | | |
| 565 | ;|OUTD |?*??1-|Output and Decrement |[C]=[HL],HL=HL-1,B=B-1| | |
| 566 | ;|OUTI |?*??1-|Output and Increment |[C]=[HL],HL=HL+1,B=B-1| | |
| 567 | ;|POP xx |------|Pop |xx=[SP]+ | | |
| 568 | ;|POP qq |------|Pop |qq=[SP]+ | | |
| 569 | ;|PUSH xx |------|Push |-[SP]=xx | | |
| 570 | ;|PUSH qq |------|Push |-[SP]=qq | | |
| 571 | ;|RES b,m |------|Reset bit |m=m&{~2^b} | | |
| 572 | ;|RET |------|Return |PC=[SP]+ | | |
| 573 | ;|RET cc |------|Conditional Return |If cc RET | | |
| 574 | ;|RETI |------|Return from Interrupt|PC=[SP]+ | | |
| 575 | ;|RETN |------|Return from NMI |PC=[SP]+ | | |
| 576 | ;|RL m |**0P0*|Rotate Left |m={CY,m}<- | | |
| 577 | ;|RLA |--0-0*|Rotate Left Acc. |A={CY,A}<- | | |
| 578 | ;|RLC m |**0P0*|Rotate Left Circular |m=m<- | | |
| 579 | ;|RLCA |--0-0*|Rotate Left Circular |A=A<- | | |
| 580 | ;|RLD |**0P0-|Rotate Left 4 bits |{A,[HL]}={A,[HL]}<- ##| | |
| 581 | ;|RR m |**0P0*|Rotate Right |m=->{CY,m} | | |
| 582 | ;|RRA |--0-0*|Rotate Right Acc. |A=->{CY,A} | | |
| 583 | ;|RRC m |**0P0*|Rotate Right Circular|m=->m | | |
| 584 | ;|RRCA |--0-0*|Rotate Right Circular|A=->A | | |
| 585 | ;|RRD |**0P0-|Rotate Right 4 bits |{A,[HL]}=->{A,[HL]} ##| | |
| 586 | ;|RST p |------|Restart | (p=0H,8H,10H,...,38H)| | |
| 587 | ;|SBC A,s |***V1*|Subtract with Carry |A=A-s-CY | | |
| 588 | ;|SBC HL,ss |**?V1*|Subtract with Carry |HL=HL-ss-CY | | |
| 589 | ;|SCF |--0-01|Set Carry Flag |CY=1 | | |
| 590 | ;|SET b,m |------|Set bit |m=mv{2^b} | | |
| 591 | ;|SLA m |**0P0*|Shift Left Arithmetic|m=m*2 | | |
| 592 | ;|SRA m |**0P0*|Shift Right Arith. |m=m/2 | | |
| 593 | ;|SRL m |**0P0*|Shift Right Logical |m=->{0,m,CY} | | |
| 594 | ;|SUB s |***V1*|Subtract |A=A-s | | |
| 595 | ;|XOR s |**0P00|Logical Exclusive OR |A=Axs | | |
| 596 | ;|----------+------+--------------------------------------------| | |
| 597 | ;| F |-*01? |Flag unaffected/affected/reset/set/unknown | | |
| 598 | ;| S |S |Sign flag (Bit 7) | | |
| 599 | ;| Z | Z |Zero flag (Bit 6) | | |
| 600 | ;| HC | H |Half Carry flag (Bit 4) | | |
| 601 | ;| P/V | P |Parity/Overflow flag (Bit 2, V=overflow) | | |
| 602 | ;| N | N |Add/Subtract flag (Bit 1) | | |
| 603 | ;| CY | C|Carry flag (Bit 0) | | |
| 604 | ;|-----------------+--------------------------------------------| | |
| 605 | ;| n |Immediate addressing | | |
| 606 | ;| nn |Immediate extended addressing | | |
| 607 | ;| e |Relative addressing (PC=PC+2+offset) | | |
| 608 | ;| [nn] |Extended addressing | | |
| 609 | ;| [xx+d] |Indexed addressing | | |
| 610 | ;| r |Register addressing | | |
| 611 | ;| [rr] |Register indirect addressing | | |
| 612 | ;| |Implied addressing | | |
| 613 | ;| b |Bit addressing | | |
| 614 | ;| p |Modified page zero addressing (see RST) | | |
| 615 | ;|-----------------+--------------------------------------------| | |
| 616 | ;|DEFB n(,...) |Define Byte(s) | | |
| 617 | ;|DEFB 'str'(,...) |Define Byte ASCII string(s) | | |
| 618 | ;|DEFS nn |Define Storage Block | | |
| 619 | ;|DEFW nn(,...) |Define Word(s) | | |
| 620 | ;|-----------------+--------------------------------------------| | |
| 621 | ;| A B C D E |Registers (8-bit) | | |
| 622 | ;| AF BC DE HL |Register pairs (16-bit) | | |
| 623 | ;| F |Flag register (8-bit) | | |
| 624 | ;| I |Interrupt page address register (8-bit) | | |
| 625 | ;| IX IY |Index registers (16-bit) | | |
| 626 | ;| PC |Program Counter register (16-bit) | | |
| 627 | ;| R |Memory Refresh register | | |
| 628 | ;| SP |Stack Pointer register (16-bit) | | |
| 629 | ;|-----------------+--------------------------------------------| | |
| 630 | ;| b |One bit (0 to 7) | | |
| 631 | ;| cc |Condition (C,M,NC,NZ,P,PE,PO,Z) | | |
| 632 | ;| d |One-byte expression (-128 to +127) | | |
| 633 | ;| dst |Destination s, ss, [BC], [DE], [HL], [nn] | | |
| 634 | ;| e |One-byte expression (-126 to +129) | | |
| 635 | ;| m |Any register r, [HL] or [xx+d] | | |
| 636 | ;| n |One-byte expression (0 to 255) | | |
| 637 | ;| nn |Two-byte expression (0 to 65535) | | |
| 638 | ;| pp |Register pair BC, DE, IX or SP | | |
| 639 | ;| qq |Register pair AF, BC, DE or HL | | |
| 640 | ;| qq' |Alternative register pair AF, BC, DE or HL | | |
| 641 | ;| r |Register A, B, C, D, E, H or L | | |
| 642 | ;| rr |Register pair BC, DE, IY or SP | | |
| 643 | ;| s |Any register r, value n, [HL] or [xx+d] | | |
| 644 | ;| src |Source s, ss, [BC], [DE], [HL], nn, [nn] | | |
| 645 | ;| ss |Register pair BC, DE, HL or SP | | |
| 646 | ;| xx |Index register IX or IY | | |
| 647 | ;|-----------------+--------------------------------------------| | |
| 648 | ;| + - * / ^ |Add/subtract/multiply/divide/exponent | | |
| 649 | ;| & ~ v x |Logical AND/NOT/inclusive OR/exclusive OR | | |
| 650 | ;| <- -> |Rotate left/right | | |
| 651 | ;| [ ] |Indirect addressing | | |
| 652 | ;| [ ]+ -[ ] |Indirect addressing auto-increment/decrement| | |
| 653 | ;| { } |Combination of operands | | |
| 654 | ;| # |Also BC=BC-1,DE=DE-1 | | |
| 655 | ;| ## |Only lower 4 bits of accumulator A used | | |
| 656 | ;---------------------------------------------------------------- | |
| 657 | ||
| 658 | ;How the flags are supposed to work: | |
| 659 | ;7 ZFL_S - Sign flag (=MSBit of result) | |
| 660 | ;6 ZFL_Z - Zero flag. Is 1 when the result is 0 | |
| 661 | ;4 ZFL_H - Half-carry (carry from bit 3 to 4) | |
| 662 | ;2 ZFL_P - Parity/2-complement Overflow | |
| 663 | ;1 ZFL_N - Subtract - set if last op was a subtract | |
| 664 | ;0 ZFL_C - Carry | |
| 665 | ; | |
| 666 | ;I sure hope I got the mapping between flags and instructions correct... | |
| 667 | ||
| 668 | .equ ZFL_S = 7 | |
| 669 | .equ ZFL_Z = 6 | |
| 670 | .equ ZFL_H = 4 | |
| 671 | .equ ZFL_P = 2 | |
| 672 | .equ ZFL_N = 1 | |
| 673 | .equ ZFL_C = 0 | |
| 674 | ||
| 675 | .equ AVR_T = SREG_T | |
| 676 | .equ AVR_H = SREG_H | |
| 677 | .equ AVR_S = SREG_S | |
| 678 | .equ AVR_V = SREG_V | |
| 679 | .equ AVR_N = SREG_N | |
| 680 | .equ AVR_Z = SREG_Z | |
| 681 | .equ AVR_C = SREG_C | |
| 682 | ||
| 683 | ;------------------------------------------------; | |
| 684 | ; Load table value from flash indexed by source reg. | |
| 685 | ; | |
| 686 | ;ldpmx dstreg,tablebase,indexreg | |
| 687 | ; | |
| 688 | ; (6 words, 8 cycles) | |
| 689 | ||
| 690 | .macro ldpmx | |
| 691 | ldi zh,high(@1*2) ; table must be page aligned | |
| 692 | mov zl,@2 | |
| 693 | lpm @0,z | |
| 694 | .endm | |
| 695 | ||
| 696 | .macro do_z80_flags_HP | |
| 697 | #if EM_Z80 | |
| 698 | bmov z_flags, ZFL_P, temp, AVR_V | |
| 699 | bmov z_flags, ZFL_H, temp, AVR_H | |
| 700 | #endif | |
| 701 | .endm | |
| 702 | ||
| 703 | .macro do_z80_flags_set_N | |
| 704 | #if EM_Z80 | |
| 705 | ori z_flags, (1<<ZFL_N) ; Negation auf 1 | |
| 706 | #endif | |
| 707 | .endm | |
| 708 | ||
| 709 | .macro do_z80_flags_set_HN | |
| 710 | #if EM_Z80 | |
| 711 | ori z_flags,(1<<ZFL_N)|(1<<ZFL_H) | |
| 712 | #endif | |
| 713 | .endm | |
| 714 | ||
| 715 | .macro do_z80_flags_clear_N | |
| 716 | #if EM_Z80 | |
| 717 | andi z_flags,~(1<<ZFL_N) | |
| 718 | #endif | |
| 719 | .endm | |
| 720 | ||
| 721 | .macro do_z80_flags_op_rotate | |
| 722 | ; must not change avr carry flag! | |
| 723 | #if EM_Z80 | |
| 724 | andi z_flags, ~( (1<<ZFL_H) | (1<<ZFL_N) | (1<<ZFL_C) ) | |
| 725 | #else | |
| 726 | andi z_flags, ~( (1<<ZFL_C) ) | |
| 727 | #endif | |
| 728 | .endm | |
| 729 | ||
| 730 | .macro do_z80_flags_op_and | |
| 731 | #if EM_Z80 | |
| 732 | ori z_flags,(1<<ZFL_H) | |
| 733 | #else | |
| 734 | ori z_flags,(1<<ZFL_H) | |
| 735 | #endif | |
| 736 | .endm | |
| 737 | ||
| 738 | .macro do_z80_flags_op_or | |
| 739 | #if EM_Z80 | |
| 740 | #endif | |
| 741 | .endm | |
| 742 | ||
| 743 | ||
| 744 | ;---------------------------------------------------------------- | |
| 745 | ||
| 746 | do_op_inv: | |
| 747 | printstring "Invalid opcode @ PC=" | |
| 748 | movw temp,z_pcl | |
| 749 | rcall printhexw | |
| 750 | ||
| 751 | haltinv: | |
| 752 | rjmp haltinv | |
| 753 | ||
| 754 | do_op_nop: | |
| 755 | ret | |
| 756 | ||
| 757 | ;---------------------------------------------------------------- | |
| 758 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 759 | ;---------------------------------------------------------------- | |
| 760 | ;|OUT [n],A |------|Output |[n]=A | | |
| 761 | ; | |
| 762 | ; | |
| 763 | ;Interface with peripherials goes here :) | |
| 764 | do_op_outa: ; out (opl),a | |
| 765 | .if PORT_DEBUG | |
| 766 | printnewline | |
| 767 | printstring "Port write: " | |
| 768 | mov temp,z_a | |
| 769 | rcall printhex | |
| 770 | printstring " -> (" | |
| 771 | mov temp,opl | |
| 772 | rcall printhex | |
| 773 | printstring ") " | |
| 774 | .endif | |
| 775 | mov temp,z_a | |
| 776 | mov temp2,opl | |
| 777 | rcall portWrite | |
| 778 | ret | |
| 779 | ||
| 780 | ;---------------------------------------------------------------- | |
| 781 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 782 | ;---------------------------------------------------------------- | |
| 783 | ;|IN A,[n] |------|Input |A=[n] | | |
| 784 | ; | |
| 785 | ; | |
| 786 | do_op_in: ; in a,(opl) | |
| 787 | .if PORT_DEBUG | |
| 788 | printnewline | |
| 789 | printstring "Port read: (" | |
| 790 | mov temp,opl | |
| 791 | rcall printhex | |
| 792 | printstring ") -> " | |
| 793 | .endif | |
| 794 | ||
| 795 | mov temp2,opl | |
| 796 | rcall portRead | |
| 797 | mov opl,temp | |
| 798 | ||
| 799 | .if PORT_DEBUG | |
| 800 | rcall printhex | |
| 801 | printstring " " | |
| 802 | .endif | |
| 803 | ret | |
| 804 | ||
| 805 | ;---------------------------------------------------------------- | |
| 806 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 807 | ;---------------------------------------------------------------- | |
| 808 | ;|INC r |***V0-|Increment |r=r+1 | | |
| 809 | ;|INC [HL] |***V0-|Increment |[HL]=[HL]+1 | | |
| 810 | ;|INC [xx+d]|***V0-|Increment |[xx+d]=[xx+d]+1 | | |
| 811 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 812 | ;|INC r |**-P0-|Increment |r=r+1 | | |
| 813 | ;|INC [HL] |**-P0-|Increment |[HL]=[HL]+1 | | |
| 814 | ; | |
| 815 | ; | |
| 816 | do_op_inc: | |
| 817 | inc opl | |
| 818 | #if EM_Z80 | |
| 819 | in temp, sreg | |
| 820 | #endif | |
| 821 | andi z_flags,(1<<ZFL_H)|(1<<ZFL_C) ; preserve C-, and H-flag | |
| 822 | ldpmx temp2, sz53p_tab, opl | |
| 823 | or z_flags,temp2 ; | |
| 824 | do_z80_flags_HP | |
| 825 | ret | |
| 826 | ||
| 827 | do_op_inca: | |
| 828 | inc z_a | |
| 829 | #if EM_Z80 | |
| 830 | in temp, sreg | |
| 831 | #endif | |
| 832 | andi z_flags,(1<<ZFL_H)|(1<<ZFL_C) ; preserve C-, and H-flag | |
| 833 | ldpmx temp2, sz53p_tab, z_a | |
| 834 | or z_flags,temp2 ; | |
| 835 | do_z80_flags_HP | |
| 836 | ret | |
| 837 | ||
| 838 | ;---------------------------------------------------------------- | |
| 839 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 840 | ;---------------------------------------------------------------- | |
| 841 | ;|DEC r |***V1-|Decrement |s=s-1 | | |
| 842 | ;|INC [HL] |***V0-|Increment |[HL]=[HL]+1 | | |
| 843 | ;|INC [xx+d]|***V0-|Increment |[xx+d]=[xx+d]+1 | | |
| 844 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 845 | ;|DEC r |**-P -|Increment |r=r+1 | | |
| 846 | ;|DEC [HL] |**-P -|Increment |[HL]=[HL]+1 | | |
| 847 | ; | |
| 848 | ; | |
| 849 | do_op_dec: | |
| 850 | dec opl | |
| 851 | #if EM_Z80 | |
| 852 | in temp, sreg | |
| 853 | #endif | |
| 854 | andi z_flags,(1<<ZFL_H)|(1<<ZFL_C) ; preserve C-, and H-flag | |
| 855 | ldpmx temp2, sz53p_tab, opl | |
| 856 | or z_flags,temp2 ; | |
| 857 | do_z80_flags_HP | |
| 858 | do_z80_flags_set_N | |
| 859 | ret | |
| 860 | ||
| 861 | do_op_deca: | |
| 862 | dec z_a | |
| 863 | #if EM_Z80 | |
| 864 | in temp, sreg | |
| 865 | #endif | |
| 866 | andi z_flags,(1<<ZFL_H)|(1<<ZFL_C) ; preserve C-, and H-flag | |
| 867 | ldpmx temp2, sz53p_tab, z_a | |
| 868 | or z_flags,temp2 ; | |
| 869 | do_z80_flags_HP | |
| 870 | do_z80_flags_set_N | |
| 871 | ret | |
| 872 | ||
| 873 | ;---------------------------------------------------------------- | |
| 874 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 875 | ;---------------------------------------------------------------- | |
| 876 | ;|INC xx |------|Increment |xx=xx+1 | | |
| 877 | ;|INC ss |------|Increment |ss=ss+1 | | |
| 878 | ; | |
| 879 | ; | |
| 880 | do_op_inc16: | |
| 881 | subi opl,low(-1) | |
| 882 | sbci oph,high(-1) | |
| 883 | ret | |
| 884 | ||
| 885 | ;---------------------------------------------------------------- | |
| 886 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 887 | ;---------------------------------------------------------------- | |
| 888 | ;|DEC xx |------|Decrement |xx=xx-1 | | |
| 889 | ;|DEC ss |------|Decrement |ss=ss-1 | | |
| 890 | ; | |
| 891 | ; | |
| 892 | do_op_dec16: | |
| 893 | subi opl, 1 | |
| 894 | sbci oph, 0 | |
| 895 | ret | |
| 896 | ||
| 897 | ;---------------------------------------------------------------- | |
| 898 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 899 | ;---------------------------------------------------------------- | |
| 900 | ;|RLCA |--0-0*|Rotate Left Circular |A=A<- | | |
| 901 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 902 | ;|RLCA |---- *|Rotate Left Circular |A=A<- | | |
| 903 | ; | |
| 904 | ; | |
| 905 | do_op_rlc: | |
| 906 | ;Rotate Left Cyclical. All bits move 1 to the | |
| 907 | ;left, the msb becomes c and lsb. | |
| 908 | do_z80_flags_op_rotate | |
| 909 | lsl opl | |
| 910 | brcc do_op_rlc_noc | |
| 911 | ori opl, 1 | |
| 912 | ori z_flags, (1<<ZFL_C) | |
| 913 | do_op_rlc_noc: | |
| 914 | ret | |
| 915 | ||
| 916 | ;---------------------------------------------------------------- | |
| 917 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 918 | ;---------------------------------------------------------------- | |
| 919 | ;|RRCA |--0-0*|Rotate Right Circular|A=->A | | |
| 920 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 921 | ;|RRCA |---- *|Rotate Right Circular|A=->A | | |
| 922 | ; | |
| 923 | ; | |
| 924 | do_op_rrc: | |
| 925 | ;Rotate Right Cyclical. All bits move 1 to the | |
| 926 | ;right, the lsb becomes c and msb. | |
| 927 | do_z80_flags_op_rotate | |
| 928 | lsr opl | |
| 929 | brcc do_op_rrc_noc | |
| 930 | ori opl, 0x80 | |
| 931 | ori z_flags, (1<<ZFL_C) | |
| 932 | do_op_rrc_noc: | |
| 933 | ret | |
| 934 | ||
| 935 | ;---------------------------------------------------------------- | |
| 936 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 937 | ;---------------------------------------------------------------- | |
| 938 | ;|RRA |--0-0*|Rotate Right Acc. |A=->{CY,A} | | |
| 939 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 940 | ;|RRA |---- *|Rotate Right Acc. |A=->{CY,A} | | |
| 941 | ; | |
| 942 | ; | |
| 943 | do_op_rr: | |
| 944 | ;Rotate Right. All bits move 1 to the right, the lsb | |
| 945 | ;becomes c, c becomes msb. | |
| 946 | clc ; get z80 carry to avr carry | |
| 947 | sbrc z_flags,ZFL_C | |
| 948 | sec | |
| 949 | do_z80_flags_op_rotate ; (clear ZFL_C, doesn't change AVR_C) | |
| 950 | bmov z_flags,ZFL_C, opl,0 ; Bit 0 --> CY | |
| 951 | ror opl | |
| 952 | ret | |
| 953 | ||
| 954 | ;---------------------------------------------------------------- | |
| 955 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 956 | ;---------------------------------------------------------------- | |
| 957 | ;|RLA |--0-0*|Rotate Left Acc. |A={CY,A}<- | | |
| 958 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 959 | ;|RLA |---- *|Rotate Left Acc. |A={CY,A}<- | | |
| 960 | ; | |
| 961 | ; | |
| 962 | do_op_rl: | |
| 963 | ;Rotate Left. All bits move 1 to the left, the msb | |
| 964 | ;becomes c, c becomes lsb. | |
| 965 | clc | |
| 966 | sbrc z_flags,ZFL_C | |
| 967 | sec | |
| 968 | do_z80_flags_op_rotate ; (clear ZFL_C, doesn't change AVR_C) | |
| 969 | bmov z_flags,ZFL_C, opl,7 ; Bit 7 --> CY | |
| 970 | rol opl | |
| 971 | ret | |
| 972 | ||
| 973 | ;---------------------------------------------------------------- | |
| 974 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 975 | ;---------------------------------------------------------------- | |
| 976 | ;|ADD A,s |***V0*|Add |A=A+s | | |
| 977 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 978 | ;|ADD A,s |***P *|Add |A=A+s | | |
| 979 | ; | |
| 980 | ; | |
| 981 | do_op_adda: | |
| 982 | add z_a,opl | |
| 983 | in temp,sreg | |
| 984 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P flag | |
| 985 | bmov z_flags,ZFL_C, temp,AVR_C | |
| 986 | do_z80_flags_HP | |
| 987 | ret | |
| 988 | ||
| 989 | ;---------------------------------------------------------------- | |
| 990 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 991 | ;---------------------------------------------------------------- | |
| 992 | ;|ADC A,s |***V0*|Add with Carry |A=A+s+CY | | |
| 993 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 994 | ;|ADC A,s |***P *|Add with Carry |A=A+s+CY | | |
| 995 | ; | |
| 996 | ; | |
| 997 | do_op_adca: | |
| 998 | clc | |
| 999 | sbrc z_flags,ZFL_C | |
| 1000 | sec | |
| 1001 | adc z_a,opl | |
| 1002 | in temp,sreg | |
| 1003 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P | |
| 1004 | bmov z_flags,ZFL_C, temp,AVR_C | |
| 1005 | do_z80_flags_HP | |
| 1006 | ret | |
| 1007 | ||
| 1008 | ;---------------------------------------------------------------- | |
| 1009 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1010 | ;---------------------------------------------------------------- | |
| 1011 | ;|SUB s |***V1*|Subtract |A=A-s | | |
| 1012 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 1013 | ;|SUB s |***P *|Subtract |A=A-s | | |
| 1014 | ||
| 1015 | ; | |
| 1016 | do_op_subfa: | |
| 1017 | sub z_a,opl | |
| 1018 | in temp,sreg | |
| 1019 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P | |
| 1020 | bmov z_flags,ZFL_C, temp,AVR_C | |
| 1021 | do_z80_flags_HP | |
| 1022 | do_z80_flags_set_N | |
| 1023 | ret | |
| 1024 | ||
| 1025 | ;---------------------------------------------------------------- | |
| 1026 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1027 | ;---------------------------------------------------------------- | |
| 1028 | ;|CP s |***V1*|Compare |A-s | | |
| 1029 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 1030 | ;|CP s |***P *|Compare |A-s | | |
| 1031 | ||
| 1032 | ; | |
| 1033 | do_op_cpfa: | |
| 1034 | mov temp,z_a | |
| 1035 | sub temp,opl | |
| 1036 | mov opl,temp | |
| 1037 | in temp,sreg | |
| 1038 | ldpmx z_flags,sz53p_tab,opl ;S,Z,P | |
| 1039 | bmov z_flags,ZFL_C, temp,AVR_C | |
| 1040 | do_z80_flags_HP | |
| 1041 | do_z80_flags_set_N | |
| 1042 | ret | |
| 1043 | ||
| 1044 | ;---------------------------------------------------------------- | |
| 1045 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1046 | ;---------------------------------------------------------------- | |
| 1047 | ;|SBC A,s |***V1*|Subtract with Carry |A=A-s-CY | | |
| 1048 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 1049 | ;|SBC A,s |***P *|Subtract with Carry |A=A-s-CY | | |
| 1050 | ; | |
| 1051 | ; | |
| 1052 | do_op_sbcfa: | |
| 1053 | clc | |
| 1054 | sbrc z_flags,ZFL_C | |
| 1055 | sec | |
| 1056 | sbc z_a,opl | |
| 1057 | in temp,sreg | |
| 1058 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P | |
| 1059 | bmov z_flags,ZFL_C, temp,AVR_C | |
| 1060 | do_z80_flags_HP | |
| 1061 | do_z80_flags_set_N | |
| 1062 | ret | |
| 1063 | ||
| 1064 | ;---------------------------------------------------------------- | |
| 1065 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1066 | ;---------------------------------------------------------------- | |
| 1067 | ;|AND s |**1P00|Logical AND |A=A&s | | |
| 1068 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 1069 | ;|AND s |**-P 0|Logical AND |A=A&s | | |
| 1070 | ; | |
| 1071 | ; TODO H-Flag | |
| 1072 | do_op_anda: | |
| 1073 | and z_a,opl ; | |
| 1074 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,P,N,C | |
| 1075 | do_z80_flags_op_and | |
| 1076 | ret | |
| 1077 | ||
| 1078 | ||
| 1079 | ;---------------------------------------------------------------- | |
| 1080 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1081 | ;---------------------------------------------------------------- | |
| 1082 | ;|OR s |**0P00|Logical inclusive OR |A=Avs | | |
| 1083 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 1084 | ;|OR s |**-P00|Logical inclusive OR |A=Avs | | |
| 1085 | ; | |
| 1086 | ; TODO: H-Flag | |
| 1087 | do_op_ora: | |
| 1088 | or z_a,opl | |
| 1089 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,H,P,N,C | |
| 1090 | do_z80_flags_op_or | |
| 1091 | ret | |
| 1092 | ||
| 1093 | ;---------------------------------------------------------------- | |
| 1094 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1095 | ;---------------------------------------------------------------- | |
| 1096 | ;|XOR s |**0P00|Logical Exclusive OR |A=Axs | | |
| 1097 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 1098 | ;|XOR s |**-P 0|Logical Exclusive OR |A=Axs | | |
| 1099 | ; | |
| 1100 | ; TODO: H-Flag | |
| 1101 | do_op_xora: | |
| 1102 | eor z_a,opl | |
| 1103 | ldpmx z_flags,sz53p_tab,z_a ;S,Z,H,P,N,C | |
| 1104 | do_z80_flags_op_or | |
| 1105 | ret | |
| 1106 | ||
| 1107 | ;---------------------------------------------------------------- | |
| 1108 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1109 | ;---------------------------------------------------------------- | |
| 1110 | ;|ADD HL,ss |--?-0*|Add |HL=HL+ss | | |
| 1111 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 1112 | ;|ADD HL,ss |---- *|Add |HL=HL+ss | | |
| 1113 | ; | |
| 1114 | ; | |
| 1115 | do_op_addhl: | |
| 1116 | lds temp,z_l | |
| 1117 | lds temp2,z_h | |
| 1118 | add opl,temp | |
| 1119 | adc oph,temp2 | |
| 1120 | in temp,sreg | |
| 1121 | bmov z_flags,ZFL_H, temp,AVR_H | |
| 1122 | bmov z_flags,ZFL_C, temp,AVR_C | |
| 1123 | do_z80_flags_clear_N | |
| 1124 | ret | |
| 1125 | ||
| 1126 | ;---------------------------------------------------------------- | |
| 1127 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1128 | ;---------------------------------------------------------------- | |
| 1129 | ;|LD dst,src|------|Load |dst=src | | |
| 1130 | ; | |
| 1131 | ; | |
| 1132 | do_op_sthl: ;store hl to mem loc in opl:h | |
| 1133 | movw xl,opl | |
| 1134 | lds temp,z_l | |
| 1135 | mem_write | |
| 1136 | adiw xl,1 | |
| 1137 | lds temp,z_h | |
| 1138 | mem_write | |
| 1139 | ret | |
| 1140 | ||
| 1141 | ;---------------------------------------------------------------- | |
| 1142 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1143 | ;---------------------------------------------------------------- | |
| 1144 | ;|LD dst,src|------|Load |dst=src | | |
| 1145 | ; | |
| 1146 | ; | |
| 1147 | do_op_rmem16: | |
| 1148 | movw xl,opl | |
| 1149 | mem_read_d opl | |
| 1150 | adiw x,1 | |
| 1151 | mem_read_d oph | |
| 1152 | ret | |
| 1153 | ||
| 1154 | ;---------------------------------------------------------------- | |
| 1155 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1156 | ;---------------------------------------------------------------- | |
| 1157 | ;|LD dst,src|------|Load |dst=src | | |
| 1158 | ; | |
| 1159 | ; | |
| 1160 | do_op_rmem8: | |
| 1161 | mem_read_ds opl, op | |
| 1162 | ret | |
| 1163 | ||
| 1164 | ;---------------------------------------------------------------- | |
| 1165 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1166 | ;---------------------------------------------------------------- | |
| 1167 | ;|DAA |***P-*|Decimal Adjust Acc. | | | |
| 1168 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 1169 | ; | |
| 1170 | ; Not yet checked | |
| 1171 | ||
| 1172 | ; Description (http://www.z80.info/z80syntx.htm#DAA): | |
| 1173 | ; This instruction conditionally adjusts the accumulator for BCD addition | |
| 1174 | ; and subtraction operations. For addition (ADD, ADC, INC) or subtraction | |
| 1175 | ; (SUB, SBC, DEC, NEC), the following table indicates the operation performed: | |
| 1176 | ; | |
| 1177 | ; ------------------------------------------------------------------------------- | |
| 1178 | ; | | C Flag | HEX value in | H Flag | HEX value in | Number | C flag| | |
| 1179 | ; | Operation| Before | upper digit | Before | lower digit | added | After | | |
| 1180 | ; | | DAA | (bit 7-4) | DAA | (bit 3-0) | to byte | DAA | | |
| 1181 | ; |-----------------------------------------------------------------------------| | |
| 1182 | ; | | 0 | 0-9 | 0 | 0-9 | 00 | 0 | | |
| 1183 | ; | ADD | 0 | 0-8 | 0 | A-F | 06 | 0 | | |
| 1184 | ; | | 0 | 0-9 | 1 | 0-3 | 06 | 0 | | |
| 1185 | ; | ADC | 0 | A-F | 0 | 0-9 | 60 | 1 | | |
| 1186 | ; | | 0 | 9-F | 0 | A-F | 66 | 1 | | |
| 1187 | ; | INC | 0 | A-F | 1 | 0-3 | 66 | 1 | | |
| 1188 | ; | | 1 | 0-2 | 0 | 0-9 | 60 | 1 | | |
| 1189 | ; | | 1 | 0-2 | 0 | A-F | 66 | 1 | | |
| 1190 | ; | | 1 | 0-3 | 1 | 0-3 | 66 | 1 | | |
| 1191 | ; |-----------------------------------------------------------------------------| | |
| 1192 | ; | SUB | 0 | 0-9 | 0 | 0-9 | 00 | 0 | | |
| 1193 | ; | SBC | 0 | 0-8 | 1 | 6-F | FA | 0 | | |
| 1194 | ; | DEC | 1 | 7-F | 0 | 0-9 | A0 | 1 | | |
| 1195 | ; | NEG | 1 | 6-F | 1 | 6-F | 9A | 1 | | |
| 1196 | ; |-----------------------------------------------------------------------------| | |
| 1197 | ; | |
| 1198 | ; Flags: | |
| 1199 | ; C: See instruction. | |
| 1200 | ; N: Unaffected. | |
| 1201 | ; P/V: Set if Acc. is even parity after operation, reset otherwise. | |
| 1202 | ; H: See instruction. | |
| 1203 | ; Z: Set if Acc. is Zero after operation, reset otherwise. | |
| 1204 | ; S: Set if most significant bit of Acc. is 1 after operation, reset otherwise. | |
| 1205 | ||
| 1206 | ||
| 1207 | ||
| 1208 | #if 1 | |
| 1209 | do_op_da: | |
| 1210 | ldi oph,0 ; what to add | |
| 1211 | sbrc z_flags,ZFL_H ; if H-Flag | |
| 1212 | rjmp op_da_06 | |
| 1213 | mov temp,opl | |
| 1214 | andi temp,0x0f ; ... or lower digit > 9 | |
| 1215 | cpi temp,0x0a | |
| 1216 | brlo op_da_06n | |
| 1217 | op_da_06: | |
| 1218 | ori oph,0x06 | |
| 1219 | op_da_06n: | |
| 1220 | sbrc z_flags,(1<<ZFL_C) | |
| 1221 | rjmp op_da_60 | |
| 1222 | cpi opl,0xa0 | |
| 1223 | brlo op_da_60n | |
| 1224 | op_da_60: | |
| 1225 | ori oph,0x60 | |
| 1226 | op_da_60n: | |
| 1227 | cpi opl,0x9a | |
| 1228 | brlo op_da_99n | |
| 1229 | ori z_flags,(1<<ZFL_C); set C | |
| 1230 | op_da_99n: | |
| 1231 | sbrs z_flags,ZFL_N ; if sub-op | |
| 1232 | rjmp op_da_add ; then | |
| 1233 | sub opl,oph | |
| 1234 | rjmp op_da_ex | |
| 1235 | op_da_add: ; else add-op | |
| 1236 | cpi opl,0x91 | |
| 1237 | brlo op_da_60n2 | |
| 1238 | mov temp,opl | |
| 1239 | andi temp,0x0f | |
| 1240 | cpi temp,0x0a | |
| 1241 | brlo op_da_60n2 | |
| 1242 | ori oph,0x60 | |
| 1243 | op_da_60n2: | |
| 1244 | add opl,oph | |
| 1245 | op_da_ex: | |
| 1246 | in temp,SREG | |
| 1247 | sbrc temp,AVR_H | |
| 1248 | ori z_flags,(1<<ZFL_C) | |
| 1249 | andi z_flags,(1<<ZFL_N)|(1<<ZFL_C) ; preserve C,N | |
| 1250 | ldpmx temp2, sz53p_tab, opl ; get S,Z,P | |
| 1251 | or z_flags,temp2 | |
| 1252 | bmov z_flags,ZFL_H, temp,AVR_H ; H (?) | |
| 1253 | ret | |
| 1254 | #else | |
| 1255 | ||
| 1256 | do_op_da: | |
| 1257 | sbrc z_flags,ZFL_N ; if add-op | |
| 1258 | rjmp do_op_da_sub ; then | |
| 1259 | ldi temp2,0 ; | |
| 1260 | mov temp,opl ; | |
| 1261 | andi temp,0x0f ; | |
| 1262 | cpi temp,0x0a ;if lower digit > 9 | |
| 1263 | brlo do_op_da_h ; | |
| 1264 | ori temp2,0x06 ; add 6 to lower digit | |
| 1265 | do_op_da_h: ; | |
| 1266 | sbrc z_flags,ZFL_H ; ... or H-Flag | |
| 1267 | ori temp2,0x06 ; | |
| 1268 | add opl,temp2 ; | |
| 1269 | ||
| 1270 | ldi temp2,0 ; | |
| 1271 | mov temp,opl ; | |
| 1272 | andi temp,0xf0 ; | |
| 1273 | cpi temp,0xa0 ; | |
| 1274 | brlo do_op_da_c ; | |
| 1275 | ori temp2,0x60 ; | |
| 1276 | do_op_da_c: ; else sub-op | |
| 1277 | sbrc z_flags,ZFL_C ; | |
| 1278 | ori temp2,0x60 ; | |
| 1279 | andi z_flags, ~( (1<<ZFL_S) | (1<<ZFL_Z) | (1<<ZFL_H) ) | |
| 1280 | add opl,temp2 ; | |
| 1281 | in temp,SREG ; | |
| 1282 | bst temp,AVR_Z ;Z-Flag | |
| 1283 | bld z_flags,ZFL_Z ; | |
| 1284 | bst temp,AVR_N ;S-Flag | |
| 1285 | bst z_flags,ZFL_S ; | |
| 1286 | sbrc temp2,5 ;C-Flag, set if 0x06 added | |
| 1287 | ori z_flags,(1<<ZFL_C) ; | |
| 1288 | ;H-Flag? | |
| 1289 | ret | |
| 1290 | ||
| 1291 | do_op_da_sub: ;TODO: | |
| 1292 | rcall do_op_inv | |
| 1293 | ret | |
| 1294 | #endif | |
| 1295 | ||
| 1296 | ;---------------------------------------------------------------- | |
| 1297 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1298 | ;---------------------------------------------------------------- | |
| 1299 | ;|SCF |--0-01|Set Carry Flag |CY=1 | | |
| 1300 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 1301 | ; | |
| 1302 | ; | |
| 1303 | do_op_scf: | |
| 1304 | andi z_flags,~((1<<ZFL_H)|(1<<ZFL_N)) | |
| 1305 | ori z_flags,(1<<ZFL_C) | |
| 1306 | ret | |
| 1307 | ||
| 1308 | ;---------------------------------------------------------------- | |
| 1309 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1310 | ;---------------------------------------------------------------- | |
| 1311 | ;|CCF |--?-0*|Complement Carry Flag|CY=~CY | | |
| 1312 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 1313 | ;|SCF |---- 1|Set Carry Flag |CY=1 | | |
| 1314 | ; | |
| 1315 | ;TODO: H-Flag | |
| 1316 | do_op_ccf: | |
| 1317 | do_z80_flags_clear_N | |
| 1318 | ldi temp,(1<<ZFL_C) | |
| 1319 | eor z_flags,temp | |
| 1320 | ret | |
| 1321 | ||
| 1322 | ;---------------------------------------------------------------- | |
| 1323 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1324 | ;---------------------------------------------------------------- | |
| 1325 | ;|CPL |--1-1-|Complement |A=~A | | |
| 1326 | ;|----------|SZHP C|---------- 8080 ----------------------------| | |
| 1327 | ;|CPL |---- -|Complement |A=~A | | |
| 1328 | ; | |
| 1329 | ; | |
| 1330 | do_op_cpl: | |
| 1331 | com z_a | |
| 1332 | do_z80_flags_set_HN | |
| 1333 | ret | |
| 1334 | ||
| 1335 | ||
| 1336 | ;---------------------------------------------------------------- | |
| 1337 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1338 | ;---------------------------------------------------------------- | |
| 1339 | ;|PUSH xx |------|Push |-[SP]=xx | | |
| 1340 | ;|PUSH qq |------|Push |-[SP]=qq | | |
| 1341 | ; | |
| 1342 | ; | |
| 1343 | do_op_push16: | |
| 1344 | movw xl,z_spl | |
| 1345 | sbiw x,1 | |
| 1346 | mem_write_s oph | |
| 1347 | sbiw x,1 | |
| 1348 | mem_write_s opl | |
| 1349 | movw z_spl,xl | |
| 1350 | ||
| 1351 | .if STACK_DBG | |
| 1352 | printnewline | |
| 1353 | printstring "Stack push " | |
| 1354 | movw temp,opl | |
| 1355 | rcall printhexw | |
| 1356 | printstring ", SP is now " | |
| 1357 | movw temp,z_spl | |
| 1358 | rcall printhexw | |
| 1359 | printstring ". " | |
| 1360 | .endif | |
| 1361 | ||
| 1362 | ret | |
| 1363 | ||
| 1364 | ;---------------------------------------------------------------- | |
| 1365 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1366 | ;---------------------------------------------------------------- | |
| 1367 | ;|POP xx |------|Pop |xx=[SP]+ | | |
| 1368 | ;|POP qq |------|Pop |qq=[SP]+ | | |
| 1369 | ; | |
| 1370 | ; | |
| 1371 | do_op_pop16: | |
| 1372 | movw x,z_spl | |
| 1373 | mem_read_d opl | |
| 1374 | adiw x,1 | |
| 1375 | mem_read_d oph | |
| 1376 | adiw x,1 | |
| 1377 | movw z_spl,x | |
| 1378 | ||
| 1379 | .if STACK_DBG | |
| 1380 | printnewline | |
| 1381 | printstring "Stack pop " | |
| 1382 | movw temp,opl | |
| 1383 | rcall printhexw | |
| 1384 | printstring ", SP is now " | |
| 1385 | movw temp,z_spl | |
| 1386 | rcall printhexw | |
| 1387 | printstring ". " | |
| 1388 | .endif | |
| 1389 | ret | |
| 1390 | ||
| 1391 | ;---------------------------------------------------------------- | |
| 1392 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1393 | ;---------------------------------------------------------------- | |
| 1394 | ;|EX [SP],HL|------|Exchange |[SP]<->HL | | |
| 1395 | ;|EX DE,HL |------|Exchange |DE<->HL | | |
| 1396 | ;-----------------------------Z80-------------------------------- | |
| 1397 | ; | |
| 1398 | do_op_exhl: | |
| 1399 | lds temp,z_l | |
| 1400 | lds temp2,z_h | |
| 1401 | sts z_l,opl | |
| 1402 | sts z_h,oph | |
| 1403 | movw opl,temp | |
| 1404 | ret | |
| 1405 | ||
| 1406 | ;---------------------------------------------------------------- | |
| 1407 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1408 | ;---------------------------------------------------------------- | |
| 1409 | ; | |
| 1410 | ; TODO: Implement IFF1, IFF2 | |
| 1411 | do_op_di: | |
| 1412 | ret | |
| 1413 | ||
| 1414 | ;---------------------------------------------------------------- | |
| 1415 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1416 | ;---------------------------------------------------------------- | |
| 1417 | ; | |
| 1418 | ; TODO: Implement IFF1, IFF2 | |
| 1419 | do_op_ei: | |
| 1420 | ret | |
| 1421 | ||
| 1422 | ;---------------------------------------------------------------- | |
| 1423 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1424 | ;---------------------------------------------------------------- | |
| 1425 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
| 1426 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
| 1427 | ;|RET cc |------|Conditional Return |If cc RET | | |
| 1428 | ; | |
| 1429 | ; | |
| 1430 | do_op_ifnz: | |
| 1431 | sbrs z_flags, ZFL_Z | |
| 1432 | ret | |
| 1433 | pop temp ; nix tun | |
| 1434 | pop temp ; direkt zuruech zu main | |
| 1435 | ret | |
| 1436 | ||
| 1437 | ;---------------------------------------------------------------- | |
| 1438 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1439 | ;---------------------------------------------------------------- | |
| 1440 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
| 1441 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
| 1442 | ;|RET cc |------|Conditional Return |If cc RET | | |
| 1443 | ; | |
| 1444 | ; | |
| 1445 | do_op_ifz: | |
| 1446 | sbrc z_flags, ZFL_Z | |
| 1447 | ret | |
| 1448 | pop temp ; nix tun | |
| 1449 | pop temp ; direkt zuruech zu main | |
| 1450 | ret | |
| 1451 | ||
| 1452 | ;---------------------------------------------------------------- | |
| 1453 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1454 | ;---------------------------------------------------------------- | |
| 1455 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
| 1456 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
| 1457 | ;|RET cc |------|Conditional Return |If cc RET | | |
| 1458 | ; | |
| 1459 | ; | |
| 1460 | do_op_ifnc: | |
| 1461 | sbrs z_flags, ZFL_C | |
| 1462 | ret | |
| 1463 | pop temp ; nix tun | |
| 1464 | pop temp ; direkt zuruech zu main | |
| 1465 | ret | |
| 1466 | ||
| 1467 | ;---------------------------------------------------------------- | |
| 1468 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1469 | ;---------------------------------------------------------------- | |
| 1470 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
| 1471 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
| 1472 | ;|RET cc |------|Conditional Return |If cc RET | | |
| 1473 | ; | |
| 1474 | ; | |
| 1475 | do_op_ifc: | |
| 1476 | sbrc z_flags, ZFL_C | |
| 1477 | ret | |
| 1478 | pop temp ; nix tun | |
| 1479 | pop temp ; direkt zuruech zu main | |
| 1480 | ret | |
| 1481 | ||
| 1482 | ;---------------------------------------------------------------- | |
| 1483 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1484 | ;---------------------------------------------------------------- | |
| 1485 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
| 1486 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
| 1487 | ;|RET cc |------|Conditional Return |If cc RET | | |
| 1488 | ; | |
| 1489 | ; | |
| 1490 | do_op_ifpo: | |
| 1491 | sbrs z_flags, ZFL_P | |
| 1492 | ret | |
| 1493 | pop temp ; nix tun | |
| 1494 | pop temp ; direkt zuruech zu main | |
| 1495 | ret | |
| 1496 | ||
| 1497 | ;---------------------------------------------------------------- | |
| 1498 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1499 | ;---------------------------------------------------------------- | |
| 1500 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
| 1501 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
| 1502 | ;|RET cc |------|Conditional Return |If cc RET | | |
| 1503 | ; | |
| 1504 | ; | |
| 1505 | do_op_ifpe: | |
| 1506 | sbrc z_flags, ZFL_P | |
| 1507 | ret | |
| 1508 | pop temp ; nix tun | |
| 1509 | pop temp ; direkt zuruech zu main | |
| 1510 | ret | |
| 1511 | ||
| 1512 | ;---------------------------------------------------------------- | |
| 1513 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1514 | ;---------------------------------------------------------------- | |
| 1515 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
| 1516 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
| 1517 | ;|RET cc |------|Conditional Return |If cc RET | | |
| 1518 | ; | |
| 1519 | ; | |
| 1520 | do_op_ifp: ;sign positive, aka s=0 | |
| 1521 | sbrs z_flags, ZFL_S | |
| 1522 | ret | |
| 1523 | pop temp ; nix tun | |
| 1524 | pop temp ; direkt zuruech zu main | |
| 1525 | ret | |
| 1526 | ||
| 1527 | ;---------------------------------------------------------------- | |
| 1528 | ;|Mnemonic |SZHPNC|Description |Notes | | |
| 1529 | ;---------------------------------------------------------------- | |
| 1530 | ;|CALL cc,nn|------|Conditional Call |If cc CALL | | |
| 1531 | ;|JP cc,nn |------|Conditional Jump |If cc JP | | |
| 1532 | ;|RET cc |------|Conditional Return |If cc RET | | |
| 1533 | ; | |
| 1534 | ; | |
| 1535 | do_op_ifm: ;sign negative, aka s=1 | |
| 1536 | sbrc z_flags, ZFL_S | |
| 1537 | ret | |
| 1538 | pop temp ; nix tun | |
| 1539 | pop temp ; direkt zuruech zu main | |
| 1540 | ret | |
| 1541 | ||
| 1542 | ||
| 1543 | ; ----------------------- Opcode decoding ------------------------- | |
| 1544 | ||
| 1545 | ; Lookup table for Z80 opcodes. Translates the first byte of the instruction word into three | |
| 1546 | ; operations: fetch, do something, store. | |
| 1547 | ; The table is made of 256 words. | |
| 1548 | ||
| 1549 | ;.org (PC+255) & 0xff00 | |
| 1550 | todo_table: | |
| 1551 | instr do_fetch_nop, op_nop, do_store_nop ;00 ;NOP | |
| 1552 | instr do_fetch_DIR16, op_nop, do_store_BC ;01 nn nn ;LD BC,nn | |
| 1553 | instr do_fetch_A, op_nop, do_store_MBC ;02 ;LD (BC),A | |
| 1554 | instr do_fetch_BC, op_INC16, do_store_BC ;03 ;INC BC | |
| 1555 | instr do_fetch_B, op_INC, do_store_B ;04 ;INC B | |
| 1556 | instr do_fetch_B, op_DEC, do_store_B ;05 ;DEC B | |
| 1557 | instr do_fetch_DIR8, op_nop, do_store_B ;06 ;LD B,n | |
| 1558 | instr do_fetch_A, op_RLC, do_store_A ;07 ;RLCA | |
| 1559 | instr do_fetch_nop, op_INV, do_store_nop ;08 ;EX AF,AF' | |
| 1560 | instr do_fetch_BC, op_ADDHL, do_store_HL ;09 ;ADD HL,BC | |
| 1561 | instr do_fetch_MBC, op_nop, do_store_A ;0A ;LD A,(BC) | |
| 1562 | instr do_fetch_BC, op_DEC16, do_store_BC ;0B ;DEC BC | |
| 1563 | instr do_fetch_C, op_INC, do_store_C ;0C ;INC C | |
| 1564 | instr do_fetch_C, op_DEC, do_store_C ;0D ;DEC C | |
| 1565 | instr do_fetch_DIR8, op_nop, do_store_C ;0E nn ;LD C,n | |
| 1566 | instr do_fetch_A, op_RRC, do_store_A ;0F ;RRCA | |
| 1567 | instr do_fetch_nop, op_INV, do_store_nop ;10 oo ;DJNZ o | |
| 1568 | instr do_fetch_DIR16, op_nop, do_store_DE ;11 nn nn ;LD DE,nn | |
| 1569 | instr do_fetch_A, op_nop, do_store_MDE ;12 ;LD (DE),A | |
| 1570 | instr do_fetch_DE, op_INC16, do_store_DE ;13 ;INC DE | |
| 1571 | instr do_fetch_D, op_INC, do_store_D ;14 ;INC D | |
| 1572 | instr do_fetch_D, op_DEC, do_store_D ;15 ;DEC D | |
| 1573 | instr do_fetch_DIR8, op_nop, do_store_D ;16 nn ;LD D,n | |
| 1574 | instr do_fetch_A, op_RL, do_store_A ;17 ;RLA | |
| 1575 | instr do_fetch_nop, op_INV, do_store_nop ;18 oo ;JR o | |
| 1576 | instr do_fetch_DE, op_ADDHL, do_store_HL ;19 ;ADD HL,DE | |
| 1577 | instr do_fetch_MDE, op_nop, do_store_A ;1A ;LD A,(DE) | |
| 1578 | instr do_fetch_DE, op_DEC16, do_store_DE ;1B ;DEC DE | |
| 1579 | instr do_fetch_E, op_INC, do_store_E ;1C ;INC E | |
| 1580 | instr do_fetch_E, op_DEC, do_store_E ;1D ;DEC E | |
| 1581 | instr do_fetch_DIR8, op_nop, do_store_E ;1E nn ;LD E,n | |
| 1582 | instr do_fetch_A, op_RR, do_store_A ;1F ;RRA | |
| 1583 | instr do_fetch_nop, op_INV, do_store_nop ;20 oo ;JR NZ,o | |
| 1584 | instr do_fetch_DIR16, op_nop, do_store_HL ;21 nn nn ;LD HL,nn | |
| 1585 | instr do_fetch_DIR16, op_STHL, do_store_nop ;22 nn nn ;LD (nn),HL | |
| 1586 | instr do_fetch_HL, op_INC16, do_store_HL ;23 ;INC HL | |
| 1587 | instr do_fetch_H, op_INC, do_store_H ;24 ;INC H | |
| 1588 | instr do_fetch_H, op_DEC, do_store_H ;25 ;DEC H | |
| 1589 | instr do_fetch_DIR8, op_nop, do_store_H ;26 nn ;LD H,n | |
| 1590 | instr do_fetch_A, op_DA, do_store_A ;27 ;DAA | |
| 1591 | instr do_fetch_nop, op_INV, do_store_nop ;28 oo ;JR Z,o | |
| 1592 | instr do_fetch_HL, op_ADDHL, do_store_HL ;29 ;ADD HL,HL | |
| 1593 | instr do_fetch_DIR16, op_RMEM16, do_store_HL ;2A nn nn ;LD HL,(nn) | |
| 1594 | instr do_fetch_HL, op_DEC16, do_store_HL ;2B ;DEC HL | |
| 1595 | instr do_fetch_L, op_INC, do_store_L ;2C ;INC L | |
| 1596 | instr do_fetch_L, op_DEC, do_store_L ;2D ;DEC L | |
| 1597 | instr do_fetch_DIR8, op_nop, do_store_L ;2E nn ;LD L,n | |
| 1598 | instr do_fetch_nop, op_CPL, do_store_nop ;2F ;CPL | |
| 1599 | instr do_fetch_nop, op_INV, do_store_nop ;30 oo ;JR NC,o | |
| 1600 | instr do_fetch_DIR16, op_nop, do_store_SP ;31 nn nn ;LD SP,nn | |
| 1601 | instr do_fetch_DIR16, op_nop, do_store_AM ;32 nn nn ;LD (nn),A | |
| 1602 | instr do_fetch_SP, op_INC16, do_store_SP ;33 ;INC SP | |
| 1603 | instr do_fetch_MHL, op_INC, do_store_MHL ;34 ;INC (HL) | |
| 1604 | instr do_fetch_MHL, op_DEC, do_store_MHL ;35 ;DEC (HL) | |
| 1605 | instr do_fetch_DIR8, op_nop, do_store_MHL ;36 nn ;LD (HL),n | |
| 1606 | instr do_fetch_nop, op_SCF, do_store_nop ;37 ;SCF | |
| 1607 | instr do_fetch_nop, op_INV, do_store_nop ;38 oo ;JR C,o | |
| 1608 | instr do_fetch_SP, op_ADDHL, do_store_HL ;39 ;ADD HL,SP | |
| 1609 | instr do_fetch_DIR16, op_RMEM8, do_store_A ;3A nn nn ;LD A,(nn) | |
| 1610 | instr do_fetch_SP, op_DEC16, do_store_SP ;3B ;DEC SP | |
| 1611 | instr do_fetch_nop, op_INCA, do_store_nop ;3C ;INC A | |
| 1612 | instr do_fetch_nop, op_DECA, do_store_nop ;3D ;DEC A | |
| 1613 | instr do_fetch_DIR8, op_nop, do_store_A ;3E nn ;LD A,n | |
| 1614 | instr do_fetch_nop, op_CCF, do_store_nop ;3F ;CCF (Complement Carry Flag, gvd) | |
| 1615 | instr do_fetch_B, op_nop, do_store_B ;40 ;LD B,B | |
| 1616 | instr do_fetch_C, op_nop, do_store_B ;41 ;LD B,C | |
| 1617 | instr do_fetch_D, op_nop, do_store_B ;42 ;LD B,D | |
| 1618 | instr do_fetch_E, op_nop, do_store_B ;43 ;LD B,E | |
| 1619 | instr do_fetch_H, op_nop, do_store_B ;44 ;LD B,H | |
| 1620 | instr do_fetch_L, op_nop, do_store_B ;45 ;LD B,L | |
| 1621 | instr do_fetch_MHL, op_nop, do_store_B ;46 ;LD B,(HL) | |
| 1622 | instr do_fetch_A, op_nop, do_store_B ;47 ;LD B,A | |
| 1623 | instr do_fetch_B, op_nop, do_store_C ;48 ;LD C,B | |
| 1624 | instr do_fetch_C, op_nop, do_store_C ;49 ;LD C,C | |
| 1625 | instr do_fetch_D, op_nop, do_store_C ;4A ;LD C,D | |
| 1626 | instr do_fetch_E, op_nop, do_store_C ;4B ;LD C,E | |
| 1627 | instr do_fetch_H, op_nop, do_store_C ;4C ;LD C,H | |
| 1628 | instr do_fetch_L, op_nop, do_store_C ;4D ;LD C,L | |
| 1629 | instr do_fetch_MHL, op_nop, do_store_C ;4E ;LD C,(HL) | |
| 1630 | instr do_fetch_A, op_nop, do_store_C ;4F ;LD C,A | |
| 1631 | instr do_fetch_B, op_nop, do_store_D ;50 ;LD D,B | |
| 1632 | instr do_fetch_C, op_nop, do_store_D ;51 ;LD D,C | |
| 1633 | instr do_fetch_D, op_nop, do_store_D ;52 ;LD D,D | |
| 1634 | instr do_fetch_E, op_nop, do_store_D ;53 ;LD D,E | |
| 1635 | instr do_fetch_H, op_nop, do_store_D ;54 ;LD D,H | |
| 1636 | instr do_fetch_L, op_nop, do_store_D ;55 ;LD D,L | |
| 1637 | instr do_fetch_MHL, op_nop, do_store_D ;56 ;LD D,(HL) | |
| 1638 | instr do_fetch_A, op_nop, do_store_D ;57 ;LD D,A | |
| 1639 | instr do_fetch_B, op_nop, do_store_E ;58 ;LD E,B | |
| 1640 | instr do_fetch_C, op_nop, do_store_E ;59 ;LD E,C | |
| 1641 | instr do_fetch_D, op_nop, do_store_E ;5A ;LD E,D | |
| 1642 | instr do_fetch_E, op_nop, do_store_E ;5B ;LD E,E | |
| 1643 | instr do_fetch_H, op_nop, do_store_E ;5C ;LD E,H | |
| 1644 | instr do_fetch_L, op_nop, do_store_E ;5D ;LD E,L | |
| 1645 | instr do_fetch_MHL, op_nop, do_store_E ;5E ;LD E,(HL) | |
| 1646 | instr do_fetch_A, op_nop, do_store_E ;5F ;LD E,A | |
| 1647 | instr do_fetch_B, op_nop, do_store_H ;60 ;LD H,B | |
| 1648 | instr do_fetch_C, op_nop, do_store_H ;61 ;LD H,C | |
| 1649 | instr do_fetch_D, op_nop, do_store_H ;62 ;LD H,D | |
| 1650 | instr do_fetch_E, op_nop, do_store_H ;63 ;LD H,E | |
| 1651 | instr do_fetch_H, op_nop, do_store_H ;64 ;LD H,H | |
| 1652 | instr do_fetch_L, op_nop, do_store_H ;65 ;LD H,L | |
| 1653 | instr do_fetch_MHL, op_nop, do_store_H ;66 ;LD H,(HL) | |
| 1654 | instr do_fetch_A, op_nop, do_store_H ;67 ;LD H,A | |
| 1655 | instr do_fetch_B, op_nop, do_store_L ;68 ;LD L,B | |
| 1656 | instr do_fetch_C, op_nop, do_store_L ;69 ;LD L,C | |
| 1657 | instr do_fetch_D, op_nop, do_store_L ;6A ;LD L,D | |
| 1658 | instr do_fetch_E, op_nop, do_store_L ;6B ;LD L,E | |
| 1659 | instr do_fetch_H, op_nop, do_store_L ;6C ;LD L,H | |
| 1660 | instr do_fetch_L, op_nop, do_store_L ;6D ;LD L,L | |
| 1661 | instr do_fetch_MHL, op_nop, do_store_L ;6E ;LD L,(HL) | |
| 1662 | instr do_fetch_A, op_nop, do_store_L ;6F ;LD L,A | |
| 1663 | instr do_fetch_B, op_nop, do_store_MHL ;70 ;LD (HL),B | |
| 1664 | instr do_fetch_C, op_nop, do_store_MHL ;71 ;LD (HL),C | |
| 1665 | instr do_fetch_D, op_nop, do_store_MHL ;72 ;LD (HL),D | |
| 1666 | instr do_fetch_E, op_nop, do_store_MHL ;73 ;LD (HL),E | |
| 1667 | instr do_fetch_H, op_nop, do_store_MHL ;74 ;LD (HL),H | |
| 1668 | instr do_fetch_L, op_nop, do_store_MHL ;75 ;LD (HL),L | |
| 1669 | instr do_fetch_nop, op_INV, do_store_nop ;76 ;HALT | |
| 1670 | instr do_fetch_A, op_nop, do_store_MHL ;77 ;LD (HL),A | |
| 1671 | instr do_fetch_B, op_nop, do_store_A ;78 ;LD A,B | |
| 1672 | instr do_fetch_C, op_nop, do_store_A ;79 ;LD A,C | |
| 1673 | instr do_fetch_D, op_nop, do_store_A ;7A ;LD A,D | |
| 1674 | instr do_fetch_E, op_nop, do_store_A ;7B ;LD A,E | |
| 1675 | instr do_fetch_H, op_nop, do_store_A ;7C ;LD A,H | |
| 1676 | instr do_fetch_L, op_nop, do_store_A ;7D ;LD A,L | |
| 1677 | instr do_fetch_MHL, op_nop, do_store_A ;7E ;LD A,(HL) | |
| 1678 | instr do_fetch_A, op_nop, do_store_A ;7F ;LD A,A | |
| 1679 | instr do_fetch_B, op_ADDA, do_store_nop ;80 ;ADD A,B | |
| 1680 | instr do_fetch_C, op_ADDA, do_store_nop ;81 ;ADD A,C | |
| 1681 | instr do_fetch_D, op_ADDA, do_store_nop ;82 ;ADD A,D | |
| 1682 | instr do_fetch_E, op_ADDA, do_store_nop ;83 ;ADD A,E | |
| 1683 | instr do_fetch_H, op_ADDA, do_store_nop ;84 ;ADD A,H | |
| 1684 | instr do_fetch_L, op_ADDA, do_store_nop ;85 ;ADD A,L | |
| 1685 | instr do_fetch_MHL, op_ADDA, do_store_nop ;86 ;ADD A,(HL) | |
| 1686 | instr do_fetch_A, op_ADDA, do_store_nop ;87 ;ADD A,A | |
| 1687 | instr do_fetch_B, op_ADCA, do_store_nop ;88 ;ADC A,B | |
| 1688 | instr do_fetch_C, op_ADCA, do_store_nop ;89 ;ADC A,C | |
| 1689 | instr do_fetch_D, op_ADCA, do_store_nop ;8A ;ADC A,D | |
| 1690 | instr do_fetch_E, op_ADCA, do_store_nop ;8B ;ADC A,E | |
| 1691 | instr do_fetch_H, op_ADCA, do_store_nop ;8C ;ADC A,H | |
| 1692 | instr do_fetch_L, op_ADCA, do_store_nop ;8D ;ADC A,L | |
| 1693 | instr do_fetch_MHL, op_ADCA, do_store_nop ;8E ;ADC A,(HL) | |
| 1694 | instr do_fetch_A, op_ADCA, do_store_nop ;8F ;ADC A,A | |
| 1695 | instr do_fetch_B, op_SUBFA, do_store_nop ;90 ;SUB A,B | |
| 1696 | instr do_fetch_C, op_SUBFA, do_store_nop ;91 ;SUB A,C | |
| 1697 | instr do_fetch_D, op_SUBFA, do_store_nop ;92 ;SUB A,D | |
| 1698 | instr do_fetch_E, op_SUBFA, do_store_nop ;93 ;SUB A,E | |
| 1699 | instr do_fetch_H, op_SUBFA, do_store_nop ;94 ;SUB A,H | |
| 1700 | instr do_fetch_L, op_SUBFA, do_store_nop ;95 ;SUB A,L | |
| 1701 | instr do_fetch_MHL, op_SUBFA, do_store_nop ;96 ;SUB A,(HL) | |
| 1702 | instr do_fetch_A, op_SUBFA, do_store_nop ;97 ;SUB A,A | |
| 1703 | instr do_fetch_B, op_SBCFA, do_store_nop ;98 ;SBC A,B | |
| 1704 | instr do_fetch_C, op_SBCFA, do_store_nop ;99 ;SBC A,C | |
| 1705 | instr do_fetch_D, op_SBCFA, do_store_nop ;9A ;SBC A,D | |
| 1706 | instr do_fetch_E, op_SBCFA, do_store_nop ;9B ;SBC A,E | |
| 1707 | instr do_fetch_H, op_SBCFA, do_store_nop ;9C ;SBC A,H | |
| 1708 | instr do_fetch_L, op_SBCFA, do_store_nop ;9D ;SBC A,L | |
| 1709 | instr do_fetch_MHL, op_SBCFA, do_store_nop ;9E ;SBC A,(HL) | |
| 1710 | instr do_fetch_A, op_SBCFA, do_store_nop ;9F ;SBC A,A | |
| 1711 | instr do_fetch_B, op_ANDA, do_store_nop ;A0 ;AND A,B | |
| 1712 | instr do_fetch_C, op_ANDA, do_store_nop ;A1 ;AND A,C | |
| 1713 | instr do_fetch_D, op_ANDA, do_store_nop ;A2 ;AND A,D | |
| 1714 | instr do_fetch_E, op_ANDA, do_store_nop ;A3 ;AND A,E | |
| 1715 | instr do_fetch_H, op_ANDA, do_store_nop ;A4 ;AND A,H | |
| 1716 | instr do_fetch_L, op_ANDA, do_store_nop ;A5 ;AND A,L | |
| 1717 | instr do_fetch_MHL, op_ANDA, do_store_nop ;A6 ;AND A,(HL) | |
| 1718 | instr do_fetch_A, op_ANDA, do_store_nop ;A7 ;AND A,A | |
| 1719 | instr do_fetch_B, op_XORA, do_store_nop ;A8 ;XOR A,B | |
| 1720 | instr do_fetch_C, op_XORA, do_store_nop ;A9 ;XOR A,C | |
| 1721 | instr do_fetch_D, op_XORA, do_store_nop ;AA ;XOR A,D | |
| 1722 | instr do_fetch_E, op_XORA, do_store_nop ;AB ;XOR A,E | |
| 1723 | instr do_fetch_H, op_XORA, do_store_nop ;AC ;XOR A,H | |
| 1724 | instr do_fetch_L, op_XORA, do_store_nop ;AD ;XOR A,L | |
| 1725 | instr do_fetch_MHL, op_XORA, do_store_nop ;AE ;XOR A,(HL) | |
| 1726 | instr do_fetch_A, op_XORA, do_store_nop ;AF ;XOR A,A | |
| 1727 | instr do_fetch_B, op_ORA, do_store_nop ;B0 ;OR A,B | |
| 1728 | instr do_fetch_C, op_ORA, do_store_nop ;B1 ;OR A,C | |
| 1729 | instr do_fetch_D, op_ORA, do_store_nop ;B2 ;OR A,D | |
| 1730 | instr do_fetch_E, op_ORA, do_store_nop ;B3 ;OR A,E | |
| 1731 | instr do_fetch_H, op_ORA, do_store_nop ;B4 ;OR A,H | |
| 1732 | instr do_fetch_L, op_ORA, do_store_nop ;B5 ;OR A,L | |
| 1733 | instr do_fetch_MHL, op_ORA, do_store_nop ;B6 ;OR A,(HL) | |
| 1734 | instr do_fetch_A, op_ORA, do_store_nop ;B7 ;OR A,A | |
| 1735 | instr do_fetch_B, op_CPFA, do_store_nop ;B8 ;CP A,B | |
| 1736 | instr do_fetch_C, op_CPFA, do_store_nop ;B9 ;CP A,C | |
| 1737 | instr do_fetch_D, op_CPFA, do_store_nop ;BA ;CP A,D | |
| 1738 | instr do_fetch_E, op_CPFA, do_store_nop ;BB ;CP A,E | |
| 1739 | instr do_fetch_H, op_CPFA, do_store_nop ;BC ;CP A,H | |
| 1740 | instr do_fetch_L, op_CPFA, do_store_nop ;BD ;CP A,L | |
| 1741 | instr do_fetch_MHL, op_CPFA, do_store_nop ;BE ;CP A,(HL) | |
| 1742 | instr do_fetch_A, op_CPFA, do_store_nop ;BF ;CP A,A | |
| 1743 | instr do_fetch_nop, op_IFNZ, do_store_RET ;C0 ;RET NZ | |
| 1744 | instr do_fetch_nop, op_POP16, do_store_BC ;C1 ;POP BC | |
| 1745 | instr do_fetch_DIR16, op_IFNZ, do_store_PC ;C2 nn nn ;JP NZ,nn | |
| 1746 | instr do_fetch_DIR16, op_nop, do_store_PC ;C3 nn nn ;JP nn | |
| 1747 | instr do_fetch_DIR16, op_IFNZ, do_store_CALL ;C4 nn nn ;CALL NZ,nn | |
| 1748 | instr do_fetch_BC, op_PUSH16, do_store_nop ;C5 ;PUSH BC | |
| 1749 | instr do_fetch_DIR8, op_ADDA, do_store_nop ;C6 nn ;ADD A,n | |
| 1750 | instr do_fetch_RST, op_nop, do_store_CALL ;C7 ;RST 0 | |
| 1751 | instr do_fetch_nop, op_IFZ, do_store_RET ;C8 ;RET Z | |
| 1752 | instr do_fetch_nop, op_nop, do_store_RET ;C9 ;RET | |
| 1753 | instr do_fetch_DIR16, op_IFZ, do_store_PC ;CA nn nn ;JP Z,nn | |
| 1754 | instr do_fetch_nop, op_INV, do_store_nop ;CB ;(Z80 specific) | |
| 1755 | instr do_fetch_DIR16, op_IFZ, do_store_CALL ;CC nn nn ;CALL Z,nn | |
| 1756 | instr do_fetch_DIR16, op_nop, do_store_CALL ;CD nn nn ;CALL nn | |
| 1757 | instr do_fetch_DIR8, op_ADCA, do_store_nop ;CE nn ;ADC A,n | |
| 1758 | instr do_fetch_RST, op_nop, do_store_CALL ;CF ;RST 8H | |
| 1759 | instr do_fetch_nop, op_IFNC, do_store_RET ;D0 ;RET NC | |
| 1760 | instr do_fetch_nop, op_POP16, do_store_DE ;D1 ;POP DE | |
| 1761 | instr do_fetch_DIR16, op_IFNC, do_store_PC ;D2 nn nn ;JP NC,nn | |
| 1762 | instr do_fetch_DIR8, op_OUTA, do_store_nop ;D3 nn ;OUT (n),A | |
| 1763 | instr do_fetch_DIR16, op_IFNC, do_store_CALL ;D4 nn nn ;CALL NC,nn | |
| 1764 | instr do_fetch_DE, op_PUSH16, do_store_nop ;D5 ;PUSH DE | |
| 1765 | instr do_fetch_DIR8, op_SUBFA, do_store_nop ;D6 nn ;SUB n | |
| 1766 | instr do_fetch_RST, op_nop, do_store_CALL ;D7 ;RST 10H | |
| 1767 | instr do_fetch_nop, op_IFC, do_store_RET ;D8 ;RET C | |
| 1768 | instr do_fetch_nop, op_nop, do_store_nop ;D9 ;EXX | |
| 1769 | instr do_fetch_DIR16, op_IFC, do_store_PC ;DA nn nn ;JP C,nn | |
| 1770 | instr do_fetch_DIR8, op_IN, do_store_A ;DB nn ;IN A,(n) | |
| 1771 | instr do_fetch_DIR16, op_IFC, do_store_CALL ;DC nn nn ;CALL C,nn | |
| 1772 | instr do_fetch_nop, op_INV, do_store_nop ;DD ;(Z80 specific) | |
| 1773 | instr do_fetch_DIR8, op_SBCFA, do_store_nop ;DE nn ;SBC A,n | |
| 1774 | instr do_fetch_RST, op_nop, do_store_CALL ;DF ;RST 18H | |
| 1775 | instr do_fetch_nop, op_IFPO, do_store_RET ;E0 ;RET PO | |
| 1776 | instr do_fetch_nop, op_POP16, do_store_HL ;E1 ;POP HL | |
| 1777 | instr do_fetch_DIR16, op_IFPO, do_store_PC ;E2 nn nn ;JP PO,nn | |
| 1778 | instr do_fetch_MSP, op_EXHL, do_store_MSP ;E3 ;EX (SP),HL | |
| 1779 | instr do_fetch_DIR16, op_IFPO, do_store_CALL ;E4 nn nn ;CALL PO,nn | |
| 1780 | instr do_fetch_HL, op_PUSH16, do_store_nop ;E5 ;PUSH HL | |
| 1781 | instr do_fetch_DIR8, op_ANDA, do_store_nop ;E6 nn ;AND n | |
| 1782 | instr do_fetch_RST, op_nop, do_store_CALL ;E7 ;RST 20H | |
| 1783 | instr do_fetch_nop, op_IFPE, do_store_RET ;E8 ;RET PE | |
| 1784 | instr do_fetch_HL, op_nop, do_store_PC ;E9 ;JP HL | |
| 1785 | instr do_fetch_DIR16, op_IFPE, do_store_PC ;EA nn nn ;JP PE,nn | |
| 1786 | instr do_fetch_DE, op_EXHL, do_store_DE ;EB ;EX DE,HL | |
| 1787 | instr do_fetch_DIR16, op_IFPE, do_store_CALL ;EC nn nn ;CALL PE,nn | |
| 1788 | instr do_fetch_nop, op_INV, do_store_nop ;ED ;(Z80 specific) | |
| 1789 | instr do_fetch_DIR8, op_XORA, do_store_nop ;EE nn ;XOR n | |
| 1790 | instr do_fetch_RST, op_nop, do_store_CALL ;EF ;RST 28H | |
| 1791 | instr do_fetch_nop, op_IFP, do_store_RET ;F0 ;RET P | |
| 1792 | instr do_fetch_nop, op_POP16, do_store_AF ;F1 ;POP AF | |
| 1793 | instr do_fetch_DIR16, op_IFP, do_store_PC ;F2 nn nn ;JP P,nn | |
| 1794 | instr do_fetch_nop, op_DI, do_store_nop ;F3 ;DI | |
| 1795 | instr do_fetch_DIR16, op_IFP, do_store_CALL ;F4 nn nn ;CALL P,nn | |
| 1796 | instr do_fetch_AF, op_PUSH16, do_store_nop ;F5 ;PUSH AF | |
| 1797 | instr do_fetch_DIR8, op_ORA, do_store_nop ;F6 nn ;OR n | |
| 1798 | instr do_fetch_RST, op_nop, do_store_CALL ;F7 ;RST 30H | |
| 1799 | instr do_fetch_nop, op_IFM, do_store_RET ;F8 ;RET M | |
| 1800 | instr do_fetch_HL, op_nop, do_store_SP ;F9 ;LD SP,HL | |
| 1801 | instr do_fetch_DIR16, op_IFM, do_store_PC ;FA nn nn ;JP M,nn | |
| 1802 | instr do_fetch_nop, op_EI, do_store_nop ;FB ;EI | |
| 1803 | instr do_fetch_DIR16, op_IFM, do_store_CALL ;FC nn nn ;CALL M,nn | |
| 1804 | instr do_fetch_nop, op_INV, do_store_nop ;FD ;(Z80 specific) | |
| 1805 | instr do_fetch_DIR8, op_CPFA, do_store_nop ;FE nn ;CP n | |
| 1806 | instr do_fetch_RST, op_nop, do_store_CALL ;FF ;RST 38H | |
| 1807 | ||
| 1808 | ;---------------------------------------------------------------- | |
| 1809 | ; Lookup table, stolen from z80ex, Z80 emulation library. | |
| 1810 | ; http://z80ex.sourceforge.net/ | |
| 1811 | ||
| 1812 | ; The S, Z, 5 and 3 bits and the parity of the lookup value | |
| 1813 | ||
| 1814 | .org (PC+255) & 0xff00 | |
| 1815 | sz53p_tab: | |
| 1816 | .db 0x44,0x00,0x00,0x04,0x00,0x04,0x04,0x00 | |
| 1817 | .db 0x08,0x0c,0x0c,0x08,0x0c,0x08,0x08,0x0c | |
| 1818 | .db 0x00,0x04,0x04,0x00,0x04,0x00,0x00,0x04 | |
| 1819 | .db 0x0c,0x08,0x08,0x0c,0x08,0x0c,0x0c,0x08 | |
| 1820 | .db 0x20,0x24,0x24,0x20,0x24,0x20,0x20,0x24 | |
| 1821 | .db 0x2c,0x28,0x28,0x2c,0x28,0x2c,0x2c,0x28 | |
| 1822 | .db 0x24,0x20,0x20,0x24,0x20,0x24,0x24,0x20 | |
| 1823 | .db 0x28,0x2c,0x2c,0x28,0x2c,0x28,0x28,0x2c | |
| 1824 | .db 0x00,0x04,0x04,0x00,0x04,0x00,0x00,0x04 | |
| 1825 | .db 0x0c,0x08,0x08,0x0c,0x08,0x0c,0x0c,0x08 | |
| 1826 | .db 0x04,0x00,0x00,0x04,0x00,0x04,0x04,0x00 | |
| 1827 | .db 0x08,0x0c,0x0c,0x08,0x0c,0x08,0x08,0x0c | |
| 1828 | .db 0x24,0x20,0x20,0x24,0x20,0x24,0x24,0x20 | |
| 1829 | .db 0x28,0x2c,0x2c,0x28,0x2c,0x28,0x28,0x2c | |
| 1830 | .db 0x20,0x24,0x24,0x20,0x24,0x20,0x20,0x24 | |
| 1831 | .db 0x2c,0x28,0x28,0x2c,0x28,0x2c,0x2c,0x28 | |
| 1832 | .db 0x80,0x84,0x84,0x80,0x84,0x80,0x80,0x84 | |
| 1833 | .db 0x8c,0x88,0x88,0x8c,0x88,0x8c,0x8c,0x88 | |
| 1834 | .db 0x84,0x80,0x80,0x84,0x80,0x84,0x84,0x80 | |
| 1835 | .db 0x88,0x8c,0x8c,0x88,0x8c,0x88,0x88,0x8c | |
| 1836 | .db 0xa4,0xa0,0xa0,0xa4,0xa0,0xa4,0xa4,0xa0 | |
| 1837 | .db 0xa8,0xac,0xac,0xa8,0xac,0xa8,0xa8,0xac | |
| 1838 | .db 0xa0,0xa4,0xa4,0xa0,0xa4,0xa0,0xa0,0xa4 | |
| 1839 | .db 0xac,0xa8,0xa8,0xac,0xa8,0xac,0xac,0xa8 | |
| 1840 | .db 0x84,0x80,0x80,0x84,0x80,0x84,0x84,0x80 | |
| 1841 | .db 0x88,0x8c,0x8c,0x88,0x8c,0x88,0x88,0x8c | |
| 1842 | .db 0x80,0x84,0x84,0x80,0x84,0x80,0x80,0x84 | |
| 1843 | .db 0x8c,0x88,0x88,0x8c,0x88,0x8c,0x8c,0x88 | |
| 1844 | .db 0xa0,0xa4,0xa4,0xa0,0xa4,0xa0,0xa0,0xa4 | |
| 1845 | .db 0xac,0xa8,0xa8,0xac,0xa8,0xac,0xac,0xa8 | |
| 1846 | .db 0xa4,0xa0,0xa0,0xa4,0xa0,0xa4,0xa4,0xa0 | |
| 1847 | .db 0xa8,0xac,0xac,0xa8,0xac,0xa8,0xa8,0xac | |
| 1848 | ||
| 1849 | ; vim:set ts=8 noet nowrap | |
| 1850 |