LDA Immediate taking 6 cycles
Hi, I'm trying to build an NES Emulator. I am trying to get Pacman to work and was comparing my emulator log with Nintendulator log. However, I noticed that a specific LDA Immediate in Nintendulator...
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Artifacts when switching games with the power on
Related to viewtopic.php?t=10109It is equipped with a function that prevents the contents of the RAM from being cleared when switching games with the power on.As a result, the switched game was able...
View ArticleNES Emulation - DK infinite Loop
In these instructions of the Donkey Kong ROM:Code: 00:C7E1: 20 ED F4 JSR $F4ED00:C7E4: 4C E1 C7 JMP $C7E1There seems to be an infinite loop. This is also the subroutine:Code: 00:F4ED: A5 18 LDA $18 =...
View Articlesprite pixel definition database
I am new to the forum and looking for a database of NES game sprite definitions -- 8x8, 16x16, 16x32, 32x32... pixel data and RGB colors for old retro games. It can be any language (C, Java, Python,...
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Tiles colision detector V3 ! RUNNING with b button.... messing things up lol
This was a real puzzle to figure out , but I think I got it , left, right and bottom collision detection for now, with " live fetching " the VRAM every IRQ lol. I even managed to put some exceptions...
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The Huns , left, right bottom TOP collision detection!
Try to get to the top without clipping, send me a vid I will add the top collision detection in a few hours...Statistics: Posted by v.depatie — Sat Feb 01, 2025 9:23 pm — Replies 1 — Views 329
View ArticleResistor needed for Toploader LED light
Hi, i recently got into modding consoles last year and just finished my first rgb upgrade on my toploader. I would love to add an led light indicator when power is on, but i do not know what...
View ArticleAbout the counters designed for the NES Event Time Challenge
mapper #105(NES-EVENT), mapper #555(NES-ENENT2)The special nes cartridges used in the Nintendo World Championships and the Nintendo Campus Challenge, each with a counter to control the time limit of...
View ArticleWas there a NESDev Compo 24?
Can’t seem to find it here or on itch.ioDoctorMikeStatistics: Posted by DoctorMikeReddy — Mon Feb 03, 2025 1:11 am — Replies 1 — Views 387
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Back to white screen on opentendo build
Hi All,Was really hoping I could crack this one but hitting a dead end. With some help here a few years back I got my opentendo build up and running, more or less. Finally getting around to try and...
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MAD-1 wiring for 3 maskroms/eproms
Hello,I'm currently creating a repro cart with an english translation of Ganpuru (Gunple) - Gunman's Proof.This is a 24mb LoRom game and what i have is three 27c080 100ns eproms and a SHVC-2A3M-10...
View ArticleSNES S-CPU Data bus direction
Hey,As part of a project to replace the S-CPU with a FPGA,I'm trying to determine the direction of the data bus (if its currently writing or reading), since this is needed to set the direction of a...
View ArticleAnother Fceux bug
Can someone help me figure out whats wrong in my code for FCEUX ?It seems to have a problem loading the nametable in the ram, but IM not sure its that part, Im not to good with fceux debugger. It...
View ArticleS-CPU Replacement project
Hey,After buying my first snes, which unfortunately has a broken S-CPU (crashes when using HDMA), and witnessing the S-CPU price,I decided to make a FPGA-based replacement.it's based on a ICE40HX8K...
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Intelligent Systems FDT ICE
Carnivol was kind enough to share some images of an Intelligent Systems Famicom+FDS development unit, labeled "FDT ICE (ISD)". This particular unit appears to be from 1991. I don't think anyone has a...
View ArticleQuestion about ppu's shift register
While I was looking at the documentation related to PPU rendering, I found that the shift register is described as follows: the image data is stored in the high 8 bits, and the low 8 bits are used for...
View ArticleScheme to recreate Famicom Power Module
Hello to all, as the name suggest, i want to recreate the Famicom power module (only the power part), to use with the original DC power adaptor, someone have a schematic to do the task??Statistics:...
View Articleflickering problem
Hi, I'm playing around with the assembler for the Famicom a bit and I can't figure out how to remove the flickering when changing nametables.Code: .proc logoFiller ; Nahraj snakeNAMTABLE+atributy do...
View ArticleC# Code for Synthesizing Nes Noise: The result is different from the real Nes...
This is a C# code for synthesizing the noise of Nintendo consoles. First, it generates 16 audio segments with frequency variations in non - short mode, each lasting 0.5 seconds. Then, it generates...
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Any reason Just Breed plays a text only intro on my early famicom?
Hi All,I have an early famicom with square buttons. When playing my actual Just Breed cart (no mods) it shows the text only intro instead of the Animated intro with mmc5 music. I attached some gifs to...
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