Sonic_knuckles_wsonic3.bin _hot_ -

When the lock‑on cartridge is inserted, the CPLD asserts for the lock‑on ROM for the address range 0xA12000–0xA13FFF (the “extension window”). All other addresses fall through to the underlying Sonic 3 ROM.

| Offset (hex) | Length (bytes) | Description | |--------------|----------------|-------------| | 0x00000000 | 0x200000 (2 MiB) | – original Sonic 3 data (or a patched version). | | 0x00200000 | 0x200000 (2 MiB) | Lock‑On ROM – custom W‑Sonic‑3 code + glue loader. | | 0x00400000 | 0x000000 (EOF) | End of file (exactly 4 MiB). | sonic_knuckles_wsonic3.bin

This .bin file is a binary copy of the combined Sonic 3 and Sonic & Knuckles cartridges. Originally, these were two separate games that could be "locked" together using Sega's unique Lock-on Technology. In the digital world, this combined data is stored as a single ROM file. When the lock‑on cartridge is inserted, the CPLD

In the context of Sonic the Hedgehog 3 modding, sonic_knuckles_wsonic3.bin likely represents a patch or a modification that integrates elements from Knuckles' Chaotix into Sonic the Hedgehog 3. This could include new levels, characters, gameplay mechanics, or other enhancements that blend the gameplay experiences of both titles. | | 0x00200000 | 0x200000 (2 MiB) |

| Year | Project | Goal | |------|---------|------| | 1994 | (official) | Merge two commercial titles. | | 2002–2004 | Sonic 3 Remakes (e.g., “Sonic 3 Complete”) | Replace missing sound driver and fix bugs. | | 2008–2010 | W‑Sonic‑3 (“World‑Sonic‑3”) | A fan‑made, “what‑if” version that adds new zones, enemies, and a re‑balanced difficulty curve, built on the lock‑on platform. | | 2015‑2022 | Various speed‑run‑oriented patches | Reduce load times, enable “debug mode”, etc. |