6502 interrupts and mapper (and DMC, FrameCounter) IRQs
Hello,It's been a while since I posted something in the forum. I started developing a NES emulator in C/C++ many years ago (maybe 17), and I'm working on it every now and then when I have free time...
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PPU Palette RAM Access Questions
I have a few questions about how the PPU does Palette RAM Addressing, as i feel the Wiki is vague about this.When the PPU reads from Palette RAM ($3Fxx), does it still pull /RD low? The Pinout page...
View ArticleWork on my engine so far
Nothing too impressive so far. A test of tools and the engine I have been on-and-off working on. Just picked it back up and corrected what I believe are all outstanding bugs related to basic camera...
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Nujabes ~ Aruarian Dance PCM demo
First time posting a proper finished project of mine here!This is a 7-bit PCM demo of Aruarian Dance. Cartridge is 512K PRG + 16K CHR, MMC3 (should work with either major revision). The audio is...
View ArticleGBC lcd bus 18bit? 15bit?
I was reading GBC schematic recently and noticed the lcd bus is 18bit. R0~R5, G0~G5 and B0~B5. But doesn't GBC only output 32768 colors IIRC? May I assume the bus is actually 15bit, that R0, G0 and B0...
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G-BASIC v5 found! Help needed.
Hi all,Recently I bought a GLK-2004 keyboard famiclone with a few cartridgess and a controller for dirt cheap, $5.The keyboard has no parallel port, only two 15 pin controller ports and a cartridge...
View Articleca65 ExHiROM mapping config file
Hi, I am looking to make a ld65 (ca65) linker config file for ExHiROM to use on a game I am making.How would I make one? Thanks.Statistics: Posted by Emojiman7557 — Tue Nov 05, 2024 12:16 pm — Replies...
View ArticleStupid question about bleeding CPU cycles to create a blank border on the top...
I am trying to hide the top 16-pixels in my engine.My vblank code is very predictable in how many cycles it uses, so after vblank is finished, I was considering attempting to bleed CPUcycles with some...
View ArticleTrying to Understand the Address Bus
So a goal I've had for a long time but still haven't achieved is an intimate understanding of precisely what is happening in the circuit on a computer (and using the NES as a particular example) when...
View ArticleBackground Tiles Not Rendering
I am attempting to render background tiles from the cc65 neschar.s, and on startup in FCEUX all I see is a blank background, whereas in the Name Table Viewer I see the expected tiles.Code: .segment...
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