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authorcrecher <crecher@crecher.net>2026-10-12 04:10:28 +0200
committercrecher <crecher@crecher.net>2026-10-12 04:11:10 +0200
commit8ce256ae6c0a21f3801076eee465cb2412abb5fd (patch)
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parent4e79da7fd45e2d783b270661ae390559da43b77a (diff)
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-nes emulator in go
-
-TODO:
-emulator base
-- [x] cpu passing nestest
-- [x] cart package (iNES parser, mapper 0)
-
-system bus (nes package)
-- [ ] Bus type: 2KB RAM mirrored through $1FFF, PPU regs $2000-$3FFF (mirrored every 8), APU/IO $4000-$4017, cart $4020+
-- [ ] OAM DMA at $4014 (stalls CPU 513/514 cycles)
-- [ ] reuse it in nestest_test.go instead of the test-only bus
-- [ ] CPU stall hook and proper IRQ/NMI line (polled between instructions)
-
-ppu, background
-- [ ] registers $2000-$2007 and v/t/x/w latch logic
-- [ ] nametables with mirroring, pattern tables, palettes, buffered $2007 reads
-- [ ] 341 dots x 262 lines timing, 3 dots per CPU cycle
-- [ ] vblank flag and NMI
-- [ ] 256x240 framebuffer and RGB palette
-
-frontend and input
-- [ ] cmd/gones with Ebitengine, one frame per 1/60s
-- [ ] controller $4016/$4017 strobe and shift register, keyboard mapping
-
-ppu, sprites
-- [ ] OAM, per-scanline evaluation, 8-sprite limit, 8x8 and 8x16, flip, priority
-- [ ] sprite-0 hit
-
-more mappers
-- [ ] MMC1 (1), UxROM (2), CNROM (3), AxROM (7)
-- [ ] MMC3 (4) with scanline IRQ
-- [ ] battery-backed save files
-
-apu
-- [ ] pulse x2, triangle, noise, DMC, frame counter, mixer
-- [ ] resampling and audio output
-
-accuracy
-- [ ] missing unofficial NOPs
-- [ ] run blargg's CPU, PPU, APU and MMC3 test ROMs
-- [ ] decide whether to go cycle-stepped
-
-polish
-- [ ] save states, pause/reset, fullscreen, gamepad
-- [ ] headless mode with framebuffer-hash regression tests
-
-
-testing:
-run "go test ./..." to run all test, "go test ./... -v" for verbose
-
-disclaimer:
-not affiliated with or endorsed by nintendo. no commercial roms are included, bring your own. (i dont want to get shot by nintendo :D)
-tests/testdata/nestest.nes and nestest.log are by kevin horton (kevtris), included for testing only.
-provided as is, without warranty.