Clik here to view.
DMC/DMA timing and quirks
Hello to everyone,I have been reading about DMC and its DMA on the wiki and trying to implement it with mixed results (and feelings ).Putting for now aside the exact way DMA steals CPU cycles, i have...
View ArticleClik here to view.
SMB1 \o/
Hello everyone,I now have a working emulator that can run SMB1 (with few glitches like green clouds). I found so many answers in this forum, so I wanted to thank you guys, I couldn’t have done it...
View ArticleClik here to view.
Sakigake!! Otoko Juku - Shippuu Ichi Gou Sei PCB
Sakigake!! Otoko Juku - Shippuu Ichi Gou SeiCTC-013920Statistics: Posted by zxbdragon — Wed Nov 13, 2024 6:28 pm — Replies 2 — Views 112
View ArticleCan I use CHR ROM and RAM at the same time?
I was thinking about the pros and cons of CHR RAM and CHR ROM and which one I'd like to use for something with a very advanced mapper like MMC5. That got me thinking, would it be possible to have some...
View ArticleClik here to view.
Nessesity (its just a placeholder name) or my EMU
I have been posting questions for some time here, but haven't shown a single screenshot or a line of code from my emulator for years.Maybe because it has always been a toy for my free time, being...
View ArticleClik here to view.
236 in 1 multicart repair
Maybe someone has a card, rom or dump of this compilation? PCB pics? I need for repair my pcb.Statistics: Posted by rafalnir1 — Thu Nov 14, 2024 11:24 am — Replies 0 — Views 86
View ArticleQuestions about correct IRQ generation
I'm experimenting with IRQ generation atm, and i'm trying to figure out how to format the IRQ signal.So far, i have a counter, that gets incremented every M2 pulse, and it is compared to a...
View ArticleWhat SNES game uses the SNES abilities the most?
What would you say, which SNES game uses all those SNES-specific abilities (mode 7, multiple bg layers, transparency etc.) the most and in the most impressive ways?However, there's one restriction:...
View ArticleClik here to view.
Chinese Tenchi wo Kurai II cartridge
Mapper 198 defines what I dubbed TNROM640 -- an MMC3 with 512 KiB of main PRG-ROM and 128 KiB of additional PRG-ROM accessible via 8 KiB banks $40-$4F. Here is what such a circuit board looks...
View ArticleElite source code
Commemorating the recent 40th anniversary of Elite, Ian Bell uploaded the source code to the NES version. Among other stuff, there is also an unfinished SNES...
View ArticleWas it common to use the PPU as a "stack"?
Just another question from me as I sift through the murky depths of NES game code without adequate gear (a.k.a., knowledge).I was looking at Super Off-Road, developed by Rare, and uses ANROM (in case...
View ArticleCastlevania 3 with Famicom Expansion Audio
HelloWhen I first learned of the audio expansion from the Famicom, I had my NES modified for that so I can enjoy whatever games that have that extra feature. I have a front loader that's already...
View ArticleAbout using FRAM instead of SRAM
First of all, I would like to make my point, which I strongly disagree with.In general, SRAM can be replaced if it is only used for low frequency saving, and is only written after manually opening the...
View ArticleClik here to view.
Famicom Moire DEMO
I created a moiré effect demo on the Famicom!Video : https://vimeo.com/1030724738If you play it on actual hardware, please use a later model Famicom (PPU 2C02E or later).It seems glitches occur on...
View ArticleClik here to view.
MIG-29 Camerica 71 glitch
Hi, i'm testing MIG-29 on UNROM pcb with bus conflict removed but this game show a glitch on start screen, ALL menu itens are hidden, only The cursor is showed. Somebody have The same problem...
View ArticleDMA mind control is not possible right?
When you run your OAM DMA, the address ($2004) that it writes to is hard wired into the transistors of the DMA unit. What if you had a mapper that connected the CPU A0 and A1 lines when that address...
View ArticleAny Official Mapper Docs Besides MMC1/MMC3?
I'm curious, have any other mapper documents besides the MMC1/3 popped up out there anywhere? Any original datasheets documenting for instance the schematic of a typical NROM cartridge? I know there...
View ArticleIs there a good source of useful self-modifiable 6502 tricks?
For some time critical pieces of code I am writing, I have been implementing a couple of in-ram routines that inject return instructions in the middle of long, fast unrolled loops and I also like to...
View ArticleAny Known Cases of High Level Languages in Commercial NES Titles?
Have any commercial games been analyzed and determined to either be assembly spit out by a code generator, or even more unlikely, incorporate some sort of scripting interface internally?Dragon Quest's...
View ArticleHow tiles choose their palete?
I'm current hacking simcity for the Nes and I want to change colors, but I want to change colors for a single tile, not all the tiles that use this palette. How can i find this in the hex rom or how...
View Article