code.nes/scroll/roulette.s, branch mainHacking the Famicom/NES just for the fun of it.
https://git.mssola.com/nes/code.nes/atom?h=main2025-03-20T17:01:34ZClear VBlank on reset on all examples2025-03-20T17:01:34ZMiquel Sabaté Solàmikisabate@gmail.com2025-03-20T17:01:34Zurn:sha1:b21e3d2588749568c777a84435905bef110f3479
This was an oversight from the very first example that has propagated
into the other ones.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
scroll: Provide an example with the MMC3 chip2025-03-12T18:42:43ZMiquel Sabaté Solàmikisabate@gmail.com2025-03-12T18:42:43Zurn:sha1:49842414e2c570c511ef5c3c9e1860ee8d2fd504
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>
Ensure background/sprite tiles are spread properly2025-02-04T21:00:36ZMiquel Sabaté Solàmikisabate@gmail.com2025-02-04T14:46:54Zurn:sha1:3e7549c71f60ee1c4b49a7c09fde3b6017818089
At least on the MMC3 chip, it's important to have background tiles on
the first pattern table and then sprite tiles on the second pattern
table. This avoids a hardware bug on scanline IRQs.
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>