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https://github.com/pinobatch/little-things-nes

One-off tech demos and test ROMs for NES
https://github.com/pinobatch/little-things-nes

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One-off tech demos and test ROMs for NES

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README 

        
# little things

One-off tech demos and test ROMs for NES



This repository will contain several tech demos for Nintendo

Entertainment System that I've produced over more than a decade

prior to 2019.



- 768-byte level editor

- [Action 53 (mapper 28) big CHR RAM](https://forums.nesdev.com/viewtopic.php?p=190851#p190851)

- [Action 53 (mapper 28) comprehensive test](https://forums.nesdev.com/viewtopic.php?p=102693#p102693)

- Anti-DiskDude header cleaner

- [BNROM and AOROM size and mirroring test](https://forums.nesdev.com/viewtopic.php?p=79826#p79826)

- [Boing 2007](https://forums.nesdev.com/viewtopic.php?p=62806#p62806):

  squashing the background using mistimed VRAM reads

- [Boolean Beakers](https://forums.nesdev.com/viewtopic.php?f=10&t=4331)

- [ca65 macros reimplementing 6502 mnemonics](https://forums.nesdev.com/viewtopic.php?f=2&t=10701)

- [CHR compression through pixel RLE](https://forums.nesdev.com/viewtopic.php?f=2&t=6068)

- Compatibility Benchmarks for 2001

- Concentration Room Emblem Designer prototype

- [Convergence](https://forums.nesdev.com/viewtopic.php?p=215229#p215229)

- [DAC nonlinear volume](https://forums.nesdev.com/viewtopic.php?f=6&t=16726)

- [DPCM Split](https://forums.nesdev.com/viewtopic.php?p=65871#p65871):

  generate a stable raster split without external timer hardware

- [EQ test](https://forums.nesdev.com/viewtopic.php?p=208506#p208506):

  pink noise and sine sweep generators

- [Eighty](https://forums.nesdev.com/viewtopic.php?p=95153#p95153):

  read buttons on the NES Four Score accessory

- Fairydust Editor with Compressed Output

- FamiTracker module to video renderer

- File extractor for Family Computer Disk System (FDS) images

- [FME-7 big PRG RAM](https://forums.nesdev.com/viewtopic.php?p=142573#p142573)

- [FME-7 IRQ acknowledgment](https://forums.nesdev.com/viewtopic.php?p=142243#p142243)

- [gmewav](https://forums.nesdev.com/viewtopic.php?f=6&t=16218): render anything libgme or DUMB plays to a WAV file

- GNOME vs. KDE: Battle of the Desktops:

  Bingo-inspired 2-player game

- Hello World program produced while learning ca65

- Insane Game:

  incomplete attempt to port the TI-83 version of SameGame

- [IRE tiny](https://forums.nesdev.com/viewtopic.php?p=159262#p159262):

  port of the IRE (brightness level) test of 240p Test Suite to run

  on a minimalist devcart

- [Mapper 78 submappers](https://forums.nesdev.com/viewtopic.php?p=208395#p208395):

  test for handling of nametable mirroring in ROMs intended to run

  on the _Uchuusen_ and _Holy Diver_ cartridge boards

- Math library:

  multiply, divide, square root, binary to decimal

- Meece:

  first NES program to use a Super NES Mouse

- [Metatile engine using 32x16-pixel cells](https://forums.nesdev.com/viewtopic.php?f=2&t=1118)

- [MMC3 big CHR RAM](https://forums.nesdev.com/viewtopic.php?f=3&t=13890)

- MMC3 save data viewer

- Nibbles:

  the snake game people have loved since the QBasic era, which

  ended up on a few famiclones' built-in pirate multicarts

- [OAM reset quirk](https://forums.nesdev.com/viewtopic.php?f=9&t=9628): 2 sprites will be missing after Reset

- [Password save](https://forums.nesdev.com/viewtopic.php?p=64656#p64656)

- [PAL chroma phase](https://forums.nesdev.com/viewtopic.php?p=133629#p133629):

  investigate how a TV comb filter combines scanlines in the video

  from various NES and famiclone models

- Port test for famiclone assembly

- [Pretendo and other fake logos](https://forums.nesdev.com/viewtopic.php?p=116405#p116405):

  generate entropy without a button press to randomly choose a parody

  logo to drop into the Game Boy boot ROM intro

- Raw PCM Hello: compare PCM to DPCM and attempt playback through

  pulse channels' volume registers

- [RGB121](https://forums.nesdev.com/viewtopic.php?p=94658#p94658):

  display 16-color images on an NES using pseudo-interlacing

- [Russian Roulette](https://forums.nesdev.com/viewtopic.php?f=2&t=6567)

- [Software parallax](https://forums.nesdev.com/viewtopic.php?f=22&t=16419):

  use bit shifting to rotate background tiles horizontally

- Sound drivers that never progressed far

- Sprite 0 hit interactive test

- [Sprite Cans](https://forums.nesdev.com/viewtopic.php?p=77094#p77094)

- [Sprite scaling](https://forums.nesdev.com/viewtopic.php?f=22&t=12055):

  real-time shrinking is possible using lookup tables

- [Tall Pixel](https://forums.nesdev.com/viewtopic.php?p=53808#p53808):

  stretch an image vertically by 150%

- [Telling LYs?](https://forums.nesdev.com/viewtopic.php?f=22&t=18998):

  sub-frame input timing test

- Text to spectrogram

- Tuning table generator for NSD.Lib

- [Vaus Test](https://forums.nesdev.com/viewtopic.php?f=22&t=10662):

  read the _Arkanoid_ controller

- [Volume tester](https://forums.nesdev.com/viewtopic.php?f=6&t=4906):

  Relative volumes of APU channels

- [VWF terminal](https://forums.nesdev.com/viewtopic.php?f=2&t=12436)

- [Zapper lag tests](https://forums.nesdev.com/viewtopic.php?f=9&t=10198)

- Projects that never proceeded past pixel art prototypes



Many of them have patches to their build system to help them build

under Python 3 and late-2010s versions of cc65.  (To get set up to

build, see the instructions for [nrom-template].)  The build process

is tested under Debian and Ubuntu distributions of the GNU/Linux

operating system and may need changes to work on Microsoft Windows.



Most should be under the zlib license or an equivalent GNU

all-permissive license, though this merits an audit.



[nrom-template]: https://github.com/pinobatch/nrom-template/