Losing my ego, releasing my unfinished work, and accepting that reputation is not important is the only reason these two disassemblies got finished. Initially I kept everything private, with the intent of releasing it publicly at some point after a while, though, I came to my senses and realized that if I ever set the project down it would end like all those other ROM hacking projects that never get finished. I was skeptical at first, and was doing everything basically by hand, but after someone automatically disassembled all the map scripts at once (which in Pokémon Red are written in assembly), it became much easier to figure out what particular subroutines did by comparing to the gameplay behavior I knew the maps had.ĭo what you can to release quality work, but don’t be afraid to share ugly code. A debugger will be your best friend (BGB is the only choice right now).Īutomation is helpful where you can fit it in. Start with the easy stuff, text and graphics, and pointers to them if practical.
If you’re interested in doing a large‐scale disassembly, data is more interesting than code at first. I started this project and this project many years ago, although at this point my work has been eclipsed by the larger community that grew out of it. If you're interested in trying it out, drop me a PM. It's designed to handle common console-game gotchas like bankswitching and inline subroutine arguments (subroutines that pop their own return address off the stack and manipulate it-very common on 8-bit consoles) It's not fully automated, it requires some Python programming to use, but I think it's much more efficient than trying to disassemble an entire game using bgb's built-in disassembler. I'll just warn you ahead of time that converting a ROM of a commercial game to source code that can be reassembled into the original ROM is a very complex and time-consuming process.īy any chance do you know Python (the programming language)? I've been working on a multi-target disassembler written in Python for the last little while. On 8-bit consoles, figuring out how a particular game manages ROM bankswitching is a good first step to figuring out the overall structure of the program. I'd start by disassembling the entire fixed bank (0000-3FFF) and looking for writes to ROM addresses (typically 0x2100 on the GB). When you see a JP or CALL to an address between 4000 and 7FFF, you have to figure out which ROM bank is switched in to determine where the jump actually goes. Remember that GB cartridges are bankswitched. On the GB each interrupt source has its own, fixed vector.
The GB has the same software interrupt instructions as a Z80 ( RST 0x38, etc.) but hardware interrupts don't correspond to any of the three Z80 interrupt modes. Interrupts are one of the main differences between the custom GB CPU and a real Z80. In most console games, the main execution loop essentially revolves around the VBLANK interrupt.
Enjoy! Everything is editable to your liking, so feel free to remove the E rating logo, change the region, or whatever.ĭownload PSD from my website Download PSD from MEGAīonus! 'Nintendo GAME BOY' vectors for DMG screenprint (for putting on top of a custom paint job)As well as 0x0100, you should also trace from each of the interrupt vectors, especially VBLANK (0040) and LCDSTAT (0048). Once I make my first run I'll share all the graphics with the forum here for free, and offer the high quality ones for a cheap price if I can.ĮDIT: I'm going ahead and upload the graphics for you all to mess with. By the looks of it the labels are screenprinted, not dyed.Īnyone know where I could get a high quality print of my labels? Id prefer if I can work closely with the company making the prints. The real labels are 42mm x 37mm with a slight bevel, and the left and right edges of th elabel where it says the model# and 'made in japan' are printed with a silver shimmer. I am wondering if anyone knows a place that can print completely custom labels at the proper size and such of the real cartridges? The label is made to look like an official gameboy game, and I also swapped the guts of the Derpcart into an official cartridge shell. I just recently got my USB cart for Gameboy (Dreg n Derp Cart) And I want to get a custom LSDJ label printed that I made. Nice quality, all you need to do it, just 20-30 minuts of your time.Link to ebay. A great case replacement kit for your original Game Boy. Some of the technologies we use are necessary for critical functions like security and site integrity, account authentication, security and privacy preferences, internal site usage and maintenance data, and to make the site work correctly for browsing and transactions. Browse our daily deals for even more savings! Free shipping on many items! Required Cookies & Technologies. Get the best deal for Nintendo Video Game Faceplates, Decals and Stickers from the largest online selection at.