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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 290 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 17 or newer installed.

Android

Coming soon...or not :(

Supported Mappers

iNES
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
Legend
295 Supported mappers
0 Supported mappers (but not implemented yet)
0 Unsupported mappers (Licensed games)
15 Unsupported mappers (Bootlegs)
7 Unknown mappers (no known games)
20 Unused mappers

UNIF
BMC-10-24-C-A1 BMC-11160 BMC-12-IN-1 BMC-13in1JY110 BMC-190in1 BMC-411120-C BMC-60311C BMC-64in1NoRepeat BMC-70in1 BMC-70in1B BMC-8-IN-1 BMC-80013-B BMC-81-01-31-C BMC-810544-C-A1 BMC-8157 BMC-830118C BMC-A65AS BMC-BS-5 BMC-D1038 BMC-F-15 BMC-F15 BMC-FK23C BMC-FK23CA BMC-G-146 BMC-GS-2004 BMC-GS-2013 BMC-Ghostbusters63in1 BMC-HP898F BMC-HPxx BMC-K-3046 BMC-NTD-03 BMC-NovelDiamond9999999in1 BMC-Super24in1SC03 BMC-T-227-1 BMC-T-262 BMC-RESET-TXROM BMC-WS BTL-MARIO1-MALEE2 DREAMTECH01 GKCX1 KS7031 LE05 LH53 SSS-NROM-256 UNL-158B UNL-255-IN-1 UNL-3D-BLOCK UNL-43272 UNL-8237A UNL-AC08 UNL-AX5705 UNL-BB UNL-CC-21 UNL-CITYFIGHT UNL-Coolboy UNL-DANCE2000 UNL-DRAGONFIGHTER UNL-DRIPGAME UNL-EDU2000 UNL-EH8813A UNL-KOF97 UNL-KS7010 UNL-KS7012 UNL-KS7013B UNL-KS7016 UNL-KS7017 UNL-KS7030 UNL-KS7037 UNL-KS7057 UNL-LH10 UNL-LH51 UNL-MALISB UNL-OneBus UNL-PEC-586 UNL-RT-01 UNL-SA-9602B UNL-SB-2000 UNL-SHERO UNL-SMB2J UNL-T-230 UNL-TC-U01-1.5M UNL-TF1201 UNL-Transformer UNL-VRC7 UNL-YOKO WAIXING-FS005

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