code.nes/shared, branch mainHacking the Famicom/NES just for the fun of it.
https://git.mssola.com/nes/code.nes/atom?h=main2026-04-10T13:42:46ZAdd the noise channel to sound/select.s2026-04-10T13:42:46ZMiquel Sabaté Solàmssola@mssola.com2026-04-10T13:42:46Zurn:sha1:ddbdfb54a8ebabbeeeb6fe10518f1a548404d5ed
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
Add the sound/select.s example2026-04-10T11:33:30ZMiquel Sabaté Solàmssola@mssola.com2026-04-09T11:30:34Zurn:sha1:00e470a4c8cefcc8e9514c6965dcd61f448d10e8
This is an iteration over the sound/beep.s example, but it covers three
channels instead of just square 1. Moreover, you can use the joypad to
select which channel you want to hear and, of course, you can combine
them all at will.
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
Add the sound/beep.s example2026-04-10T11:32:44ZMiquel Sabaté Solàmssola@mssola.com2026-04-08T22:33:04Zurn:sha1:1978afbc18ffb227f0ce36663648e00d1d2d7945
This is the most simple example you can come up when it comes to
producing sound on the NES/Famicom. Basically, a single note is
delivered to the APU which is continuously on.
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
Clarify on how nametables are to be initialized2026-04-07T21:31:04ZMiquel Sabaté Solàmssola@mssola.com2026-04-07T21:31:04Zurn:sha1:21a599651c07ee021d0f211ba45add538acd0f4a
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
shared: Bring joypad into a proper style2025-03-11T16:00:47ZMiquel Sabaté Solàmikisabate@gmail.com2025-03-11T16:00:47Zurn:sha1:428c301a80641361f51af8102628b545cf9ae63e
Put functions inside of the scope, avoid useless fallthroughs and be
more realistic on what is needed from elsewhere.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
Small code style cleanups2025-03-11T15:40:39ZMiquel Sabaté Solàmikisabate@gmail.com2025-03-11T15:40:39Zurn:sha1:f2b32ba50bf2101aabec0a7fd55f575d455cb230
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
Provide an example on multiscreen scrolling2025-03-10T22:22:22ZMiquel Sabaté Solàmikisabate@gmail.com2025-03-10T21:55:41Zurn:sha1:ba0cf9e5293f258c58ced1fcc47f558e7419dae4
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
shared: Add utilities for clearing screens2025-03-07T15:07:04ZMiquel Sabaté Solàmikisabate@gmail.com2025-03-07T15:04:42Zurn:sha1:ff22231f8a2f3714df701fd7c12b07915adc15e9
These are quite mindless, but they are rather useful on simple examples
in which we don't care about performance and we just want to show
something on the screen.
For now this didn't matter much, but on real hardware I was able to
reproduce the same glitches as with emulators which randomized memory on
both the CPU memory and on the PPU. Hence, just allow some examples to
manually reset these regions and avoid silly graphical glitches.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
scroll: Implement a roulette-like game2025-02-04T21:00:07ZMiquel Sabaté Solàmikisabate@gmail.com2025-02-04T10:00:22Zurn:sha1:6c4ac7727094259b3b5a25e8c168245983e70b2f
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
fx: Provide an example of PPU bank switching2025-02-04T21:00:07ZMiquel Sabaté Solàmikisabate@gmail.com2025-01-23T15:14:12Zurn:sha1:fdf44365e56c3741f47cbd421a57f0d074a5492c
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>