Screenshot

About

Nestalgia is a WIP cross-platform and high-accuracy NES/Famicom emulator built in Kotlin. It's being ported from discontinued Mesen NES/Famicom emulator built in C++ and C#.

Features

  • High Accuracy
  • High Compatibility: Over 300 mappers supported
  • NES, Famicom, Famicom Disk System, Dendy, Vs. System, NSF and NSFe emulation are supported
  • Save States, Battery, Overclocking and Cheat Codes
  • Audio, Video, Controller and Emulation config support
  • Over 20 controllers supported
  • Fullscreen and Screenshot support
  • Gamepad Support

Supported Controllers

Download

Windows Linux Mac

Before running, check if you have Java 21 or newer installed.

Android

Coming soon...or not :(

Supported Mappers

iNES/NES 2.0
000 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024 025 026 027 028 029 030 031 032 033 034 035 036 037 038 039 040 041 042 043 044 045 046 047 048 049 050 051 052 053 054 055 056 057 058 059 060 061 062 063 064 065 066 067 068 069 070 071 072 073 074 075 076 077 078 079 080 081 082 083 084 085 086 087 088 089 090 091 092 093 094 095 096 097 098 099 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558
Legend
305 Supported
260 Unknown or not implemented (yet)

UNIF
11160 12-IN-1 13in1JY110 190in1 22211 411120-C 42in1ResetSwitch 43272 603-5052 64in1NoRepeat 70in1 70in1B 810544-C-A1 830425C-4391T 8157 8237 830118C A65AS ANROM AX5705 BB BS-5 CITYFIGHT COOLBOY CNROM CPROM D1038 DANCE2000 DREAMTECH01 EDU2000 EKROM ELROM ETROM EWROM FARID_SLROM_8-IN-1 FARID_UNROM_8-IN-1 FK23C FK23CA FS304 G-146 GK-192 GS-2004 GS-2013 Ghostbusters63in1 H2288 HKROM KOF97 KONAMI-QTAI K-3046 KS7012 KS7013B KS7016 KS7017 KS7030 KS7031 KS7032 KS7037 KS7057 LH10 LH32 LH51 LH53 MALISB MARIO1-MALEE2 MHROM N625092 NROM NROM-128 NROM-256 NTBROM NTD-03 NovelDiamond9999999in1 RESET-TXROM RET-CUFROM RROM RROM-128 SA-002 SA-0036 SA-0037 SA-009 SA-016-1M SA-72007 SA-72008 SA-9602B SA-NROM SAROM SBROM SC-127 SCROM SEROM SGROM SHERO SKROM SL12 SL1632 SL1ROM SLROM SMB2J SNROM SOROM SUNSOFT_UNROM Sachen-74LS374N Sachen-74LS374NA Sachen-8259A Sachen-8259B Sachen-8259C Sachen-8259D Super24in1SC03 SuperHIK8in1 Supervision16in1 T-230 T-262 TBROM TC-U01-1.5M TEK90 TEROM TF1201 TFROM TGROM TKROM TKSROM TLROM TLSROM TQROM TR1ROM TSROM TVROM UNROM UNROM-512-8 UNROM-512-16 UNROM-512-32 UOROM VRC7 YOKO 158B DRAGONFIGHTER EH8813A HP898F F-15 RT-01 8-IN-1 WS 80013-B WAIXING-FW01 WAIXING-FS005 HPxx HP2018A DRIPGAME 60311C CHINA_ER_SAN2 STREETFIGTER-GAME4IN1 HP2018-A JC-016-2 NEWSTAR-GRM070-8IN1 S-2009 10-24-C-A1 830134C CTC-09 GN-26 K-3006 K-3033 K-3036 L6IN1 SA005-A TJ-03 TH2131-1 900218 831128C BJ-56 KS7021A MINDKIDS KS106C RESETNROM-XIN1 T4A54A WX-KB4K BS-5652 891227 CTC-12IN1 BS-110 830752C SB-5013 82112C 22026 N49C-300 K-3010 K-3071 AX-40G DS-07 K86B 255in1 8237A AC08 CC-21 PUZZLE SSS-NROM-256

Accuracy Tests

Test ROMs are programs created to test and validate some of the NES' behavior. They are used by emulators to ensure that the emulated console behaves as much as possible like a NES. While they are not perfect for assessing an emulator's overall accuracy, they still provide a decent estimate. The following tables list the majority of existing test ROMs and whether or not Nestalgia passes each test. All the testing ROMs can be found at Nesdev Wiki.
CPU
branch_timing/branch_basics Pass
branch_timing/backward_branch Pass
branch_timing/forward_branch Pass
cpu_dummy_reads Pass
cpu_dummy_writes_oam Pass
cpu_dummy_writes_ppumem Pass
cpu_exec_space_apu Pass
cpu_exec_space_ppuio Pass
cpu_flag_concurrency Pass
cpu_interrupts_v2 Pass
cpu_reset/ram_after_reset Pass
cpu_reset/registers Pass
cpu_timing Pass
instr_misc Pass
instr_test_v5/all_instrs Pass
instr_test_v5/official_only Pass
dmc_dma_during_read4/dma_2007_read Pass
dmc_dma_during_read4/dma_2007_write Pass
dmc_dma_during_read4/dma_4016_read Pass
dmc_dma_during_read4/double_2007_read Pass
dmc_dma_during_read4/read_write_2007 Pass
sprdma_and_dmc_dma Pass
sprdma_and_dmc_dma_512 Pass
instr_timing Pass
nestest Pass
blargg_cpu Pass
Video
ppu_read_buffer Pass
ppu_open_bus Pass
ppu_vbl_nmi Pass
sprite_overflow/basics Pass
sprite_overflow/details Pass
sprite_overflow/emulator Pass
sprite_overflow/obscure Pass
sprite_overflow/timing Pass
sprite_hit/basics Pass
sprite_hit/alignment Pass
sprite_hit/corners Pass
sprite_hit/flip Pass
sprite_hit/left_clip Pass
sprite_hit/right_edge Pass
sprite_hit/screen_bottom Pass
sprite_hit/double_height Pass
sprite_hit/timing_basics Pass
sprite_hit/timing_order Pass
sprite_hit/edge_timing Pass
nmi_sync/ntsc Pass
nmi_sync/pal Pass
blargg_ppu/palette_ram Pass
blargg_ppu/power_up_palette Pass
blargg_ppu/sprite_ram Pass
blargg_ppu/vbl_clear_time Pass
blargg_ppu/vram_access Pass
palette Pass
palette_pal Pass
oam_read Pass
oam_stress Pass
Audio
apu_reset/4015_cleared Pass
apu_reset/4017_timing Pass
apu_reset/4017_written Pass
apu_reset/irq_flag_cleared Pass
apu_reset/len_ctrs_enabled Pass
apu_reset/works_immediately Pass
blargg_apu/len_ctr Pass
blargg_apu/len_table Pass
blargg_apu/irq_flag Pass
blargg_apu/clock_jitter Pass
blargg_apu/len_timing_mode0 Pass
blargg_apu/len_timing_mode1 Pass
blargg_apu/irq_flag_timing Pass
blargg_apu/irq_timing Pass
blargg_apu/reset_timing Pass
blargg_apu/len_halt_timing Pass
blargg_apu/len_reload_timing Pass
apu_test Pass
blargg_apu/pal/len_ctr Pass
blargg_apu/pal/len_table Pass
blargg_apu/pal/irq_flag Pass
blargg_apu/pal/clock_jitter Pass
blargg_apu/pal/len_timing_mode0 Pass
blargg_apu/pal/len_timing_mode1 Pass
blargg_apu/pal/irq_flag_timing Pass
blargg_apu/pal/irq_timing Pass
blargg_apu/pal/len_halt_timing Pass
blargg_apu/pal/len_reload_timing Pass
apu_phase_reset Pass
Mapper
mmc3_irq/a12_clocking Pass
mmc3_irq/clocking Pass
mmc3_irq/details Pass
mmc3_irq/rev_A Pass
mmc3_irq/rev_B Pass
mmc3_irq/scanline_timing Pass
vrc6 Pass
Input
allpads/nes_controller_1P Pass
allpads/nes_controller_2P Pass
allpads/four_score Pass
allpads/zapper_1P Pass
allpads/zapper_2P Pass
allpads/none Pass

Gamepad Support

  • The first detected gamepad will be used as Standard Controller 1, and the second will be Standard Controller 2.
  • Y Button will take a screenshot
  • X Button will save the game's state
  • LB/RB restore the previous/next saved game's state
  • Left thumbstick can be used as D-Pad