nesdev.com

one workaround is to use Google Chrome for nesdev.com and other sites hosted by WhoaMan and Firefox for all other websites. One already has to do this for Skype and for video chat on Discord, for example. That's disappointing if this site joins the growing number of "don't give a fuck about browser...

Fun! I enjoyed completing the game and finding the sound test.

Minor graphical glitch: On the second page of the power-on credits, the hyphen and 8 in "PICO-8" are black.
(I was able to change .NES file offset F152 to value 25 to fix.)

By the way, previous discussions wondering about double-ended NES/Famicom carts happened in threads below. Both times user Fisher mentioned a brand called Hydron that actually made carts like this. The 2019 post has a link to a blog post (in Portuguese). The 2018 post includes an attached picture (u...

Previously, in August 2014: Vertical Line Animation Illusion

Internet Archive Wayback Machine versions of items no longer available:
IllusionTest.nes
NESIllusionTest.png

CDLs from FCEUX lack any type of information as to what banks are mapped into CPU address space In FCEUX 2.2.3 for Windows, the help file page Debug -> Code/Data Logger says CDL files contain some information about the bank, if I understand correctly?: CDL files are just a mask of the ROM; that is,...

See Textured raycaster on the NES

I looked at the data for Ufouria and found a way to fix the triangle channel bug. I made an FCEUX cheat to fix this bug: 0087?00:17 I like Ufouria! Could you tell us more how you found the cheat? (Did you find out what address 0087 controls? Did you find any documentation about the Ufouria or Heber...

1. Thanks for thinking about capturing some RAM contents. The only way of reading the memory content that comes to my mind is [...] Replace the SRAM with socket and make [something to plug into the socket...] Is it possible to connect the logic analyzer to the 8 data lines and the enable line of the...

krzysiobal, thank you for providing your logic analyzer dump! I had fun looking at it. Here's my analysis: hori-game-repeater-example.zip Here are some things I noticed: In the recorder signal, the 3rd and 4th bytes of the 4-byte header appear to indicate the last address used in memory for the reco...

I don't know Japanese, but I used Yandex Translate Image to OCR and Google Translate to do a translation of the side of the box with notes on it and sections 3 and 4 of the manual. I manually picked some characters from Windows Character Map to get some symbols and to correct a few of the OCR mistak...

It's explained more in depth in the linked thread, but RCWN completely subverts the browser's cache by re-requesting all content, on the off chance that re-receiving it from the server is faster than retrieving it from the cache. Nesdev is likely seeing this as a DOS attempt (multiple repeated requ...

I tested the values by using the freeze function in Mesen's memory viewer to set the values I wanted, then I pressed the "frame advance" keyboard key 16 times to observe the effect. Glancing at the code, my initial guess is that the stuff that gets stored at $3D6+X is used as a sub-pixel counter. If...

the speed is only a 4 bit value stored in the high nybble of $70-$75. The value is not signed I would describe the value as being an 8-bit signed value, but it represents the speed in sixteenths of a pixel per frame, that is: hex 10: right one pixel per frame. hex 01: right one pixel every 16 frame...

What games use that? I’m kinda curious to see how it looks. Nesdev Wiki Sprite overflow games - Use of excess sprites for masking effects Can you make another LUA (for Mesen) specifically for detecting masking effects? [...] To give an idea on how to code this script, looking into the Mesen code be...

I investigated Mario Paint's tempo and found out the following: address: $7E0C28 length: 2 bytes type: unsigned 2-byte little endian integer description: position of the tempo slider in quarter pixels, valid values are 0 to 159. The 0 position is when you drag the slider all the way to the left. Eac...