4-in-1 YH Series
Search Compilation 4-in-1 YH Series4-in-1 YH-4714-in-1 YH-1403 4-in-1 YH-1413 4-in-1 YH-1420 4-in-1 YH-1426 4-in-1 YH-1435 4-in-1 YH-3128 on this compilationthere was Super ContraSnow BrosBubble...
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DAC and internal sound logic of RP2C33
According to the modified die shot, the DAC of RP2C33 is mainly 2-2R ladder, with analog volume control adding grounding resistors.For my 37 samples, the output impedance of FDS DAC is about 12K. Use...
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Calculating Approximate Frequency of Noise Channel
I'm working on a project where I need to determine the (approximate) frequency of each APU channel. Pulse and Triangle were easy, and I haven't looked at DMC yet, but Noise has stumped me. I thought...
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Another NESRGB Issue
I'm new here so first, hi to everyone! I'm having an strange issue with my NESRGB installation that I cannot solve. I contacted Tim about it but had no response yet so also trying here.I have a PAL...
View ArticleAPU Frame Counter write jitter is causing 3-nmi_and_irq.nes and...
Hi All,I'm trying to get the cpu_interrupts_v2/rom_singles/3-nmi_and_irq.nes and blargg_apu_2005.07.30/08.irq_timing.nes tests to pass in my emulator. The problem is that when the frame counter write...
View ArticleVOTE BELOW: The NES Indie Game Hall of Fame
Change in plans! Because some folks understandably don't want to sign up for a Substack account just to vote, voting for the NES Indie Game Hall of Fame will instead occur *on-site* in three...
View Articleabout mapper 518 AKA Subor Educational Computer: SB-97
Code: PRG-ROM Bank Register ($5000)Bit 7654 3210 REPP PPPP ||++-++++- Select 16 or 32 KiB PRG bank at CPU $8000 |+-------- 0: Bank comes from main cartridge(don't care this bit, never used) | 1: Bank...
View Article132-in-1 cartridge mapper
Hi all,I couldn't resist and bought a clone console including a "132 in 1" cartridge. After digging around I could not find any information about this on the internet. Either with the name nor with...
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Help i am newbie
I have problems with 6502 assembler codingplease give me a comprehensible NES cheat sheet, please! Statistics: Posted by memnixmemnixmemnix — Wed Apr 24, 2024 9:35 am — Replies 1 — Views 150
View ArticleAn NES & SMS in between console
It's more like an idea than anything but I think it'd be cool if in the future there could be a console with specs in between NES & SMS. Whether it's a newer system like the Commander X16 or a...
View ArticleDPCM signal-to-noise ratio
Hi, I've been looking at ways to get the most out of the standard HW-supported delta encoding and Delta modulation has some simple equations that could be used to construct the perfect low-pass filter...
View ArticleZilog Z80 discontinued
Apparently the Zilog Z80 is to be discontinued this year.Statistics: Posted by Pokun — Sat Apr 27, 2024 3:39 pm — Replies 4 — Views 314
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Emulator Sound is Distorted and Can't Figure Out Why
Hello! I've been quietly lurking NESDev for quite some time developing my emulator for fun. I've gotten pretty far but sound has been a big struggle. I have managed to implement every sound channel...
View ArticleMegadrive Gamegenie and RPGs
Hi, it's been a while.I finally got the same cartridge of Phantasy Star 2 that I played as a kid from a friend.Unfortunately, the onboard battery was dead, so I lost the save I used back in the...
View ArticleAnyone have experience with the Atari 7800?
I have become recently fascinated with unsuccessful retro consoles, and the 7800 is one of them. I don't know much at all about it hardware wise, I have no clue how it stacks up against the NES, and...
View ArticleWhy No Cartridge Access to the PPU?
(After not receiving a suitably helpful answer to the question elsewhere.) Why wasn't the SNES's PPU exposed to cartridges over the system's memory bus like the NES's was? (Aside from the SNES's CPU's...
View ArticleKaijuu Monogatari SRAM save issue
Many emulator couldn’t emulate this RPG game’s save feature, each time reload ROM, savefile always gone, even with SRAM enabled (header). Is this mapper special or ROM has issue? Strangely, fan...
View ArticleNesRGB troubleshooting
Hi all,I have installed the NESRGB mod by eTim but I am having some issues.I have a PAL front loader.I installed the NESRGB mod, and paired that with a Nintendo Multiout from Lazerbear.Finally all of...
View ArticleKid dracula on PAL systems
Hello, I'm here to introduce a patch I've made to adapt the Kid Dracula original ROM to work on PAL NES consoles.You can find the patch here: https://www.romhacking.net/hacks/8590/I would like to hear...
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Background not drawing correctly.
I'm trying to create a level for my game. However, the tiles are grouping up at the top.Here is a minimal reproducible code for the bug:Code: .inesprg 1 ; 1x 16KB PRG code .ineschr 1 ; 1x 8KB CHR data...
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