NES Mappers Implementing a Privilege Architecture?
Are there any commercial mappers that implement any sort of privilege levels/rings or anything akin to memory segmentation/protection in PRG-RAM? Granted you couldn't protect the entire address space,...
View ArticleBudget Oscilloscope Recommendations for a Beginner / Hobbyist?
Does anyone have any suggestions for a good entry level scope for a hobbyist? I am not an EE student or professional. I am mostly a hobbyist. I have done professional work in the past as a repair tech...
View ArticleHow does the PLP instruction works?!
Hi guys, I was review a CPU 6502 spec, and encountered some doubts about the PLP instruction.As example: def test_plp(self): self.cpu_push_byte(0xFF) self.cpu_pc(0x0100) self.memory_set(0x0100, 0x28)...
View ArticleHomebrew Games Summer Showcase 2024
Calling all homebrew developers!Submissions are NOW OPEN for the 2024 HOMEBREW GAMES SUMMER SHOWCASE!Last year the showcase was watched over 30000 times, and featured 140 games, across 17 different...
View ArticleFamily BASIC keyboard with VT02
Hello to all. I am a Newbie of this forum. I am trying to connect the Family Basic Keyboard to a Famiclone with a vt02 chip. On the schematic of vt02 of www.vrt.com.tw. I could find 4017D4, 4017D3,...
View Articlemodification search for the game robocop.gb (u)
Hello. ips search or hexadecimal line changed (Software ultraedit) for the game robocop.gb (u) in Infinite energy with : the GameShark (good code) 012E5BC0 the Game Genie (bad code)...
View ArticleIssue figuring out how to check position in tilemap
Hi, I'm playing around with this thing, and I'm trying to figure out of the tile above the player is clear to move into. I'm checking each 8x8 tile, instead of treating each 16x16 block of tiles as...
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Mother (Original Japanese Version) Tricky to Emulate?
Hi! I've been playing around getting various games to work on my emulator and I've run into an interesting bug for a game I can't find anyone (at least on the English speaking side of the Internet)...
View Articlemodification search for the game yoda stories.gbc
hi, I'm looking for how to make or get the ini file for the Yoda Stories GBC game (poketext), thank youStatistics: Posted by AL771914 — Wed May 08, 2024 12:38 am — Replies 0 — Views 78
View ArticleMMC3 vhdl mapper
Hi,I'm looking to build myself a custom Dev cart for mmc3.I'd like to have it running on Altera cpld instead of salvaging from donor.Anyone know a good working vhdl code I can port on a Altera...
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Position of black bars in "Street Fighter II"
"Street Fighter II" on the Super Nintendo has black bars at the top and the bottom of the screen:But why are they aligned so strangely? The top bar is 22 pixels. The bottom is 9 pixels. The visible...
View ArticlePas6502 - pascal to 6502 compiler
Hi all, if you are interested, I have made a post about my Pas6502 compiler, it compiles Pascal to 6502 code and now has minimal NES support...I'm currently trying to improve...
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My source code from my old demos
I am providing my assembly code from my old demos (including my bullet hell: SuperDan), the reason is that I no longer plan to continue the code (in asm).So if certain functions are useful to you,...
View ArticleHelp with Frontloader
Hello, I just recently joined in because of an issue, so my front loader is not working anymore, I got it a sale for $20, it actually worked but suddenly one day wouldn't turn on, all I got was a...
View Articleabout mapper #232 & #104
for #104Code: $8000-$bfff: OUTER REGISTER[.... LPPP] |||| |+++- select 256KB outer PRG bank +---- 1: lock OUTER register from further writesnote: skip the first write all clear after power up, menu...
View ArticleGetting logged out like bonkers
Hi there,Lately every time I come to nesdev forum, I have to log-in. Usually I'm still logged in every time I come here. It happened at least twice today and once yesterday, any ideas what's going...
View ArticleHonō no Rangerman
Hi there,i got my self a Honō no Rangerman. Sadly this game doesn't work in my clone console. Even through the demo is a simple mapper 0 game with 32k + 8k (as also described on the retail box).First...
View ArticleCustom graphics generator
I'd like to propose an idea:A program that takes an image your upload and compresses it to certain hardware restraints, or to make pixel art with said constraints. I know Dithertron does this already,...
View Article'Reset' as 'clear' terminology
[Moderator edit: This thread is split off from the discussion starting here about reset meaning either to clear a bit to 0 or to reset something to its initial state.]I too have tended to use "clear"...
View ArticleHandling PCE and TG-16 bit order in a physical release
As I understand it, HuCard data lines in TurboGrafx-16 (export version) are bit-reversed compared to the PC Engine (Japan version). How do developers and publishers usually compensate for this?Selling...
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