Standardize instruction cycle handling and update return types for better clarity and accuracy. Add cycle count assertions in tests to ensure proper execution timings. Minor formatting fixes and typo corrections throughout the codebase.
Introduced `ExecutionReturn` struct to standardize program counter and cycle updates across instructions. Removed redundant handling of program counter increments and refactored control flow for clarity. Also removed unused `Address` target variant from `Target` enum.
Introduce a new `LCDControlRegister` struct to manage and manipulate individual bits of the LCD control register. Implement `From<u8>` and `Into<u8>` conversions for seamless integration with byte-level operations. This enhances code clarity and simplifies bitwise operations related to LCD control.
The implementation of instruction parsing has been moved out of `main.rs` into a dedicated `instructions` module. This improves code readability, reduces clutter, and promotes modularity, making it easier to maintain and extend the instruction set functionality.
Removed unused instructions (CopyHN16A, CopyHCA, etc.), simplified PC increment logic, and cleaned up test and execution code. Updated dictionaries and Cargo.lock to reflect recent changes in project structure and dependencies.
Added and refactored several instructions and memory operations, improving accuracy and functionality for emulation. Introduced new dependencies (`serde_json`, `glob`) and submodule for test framework integration. Enhanced debugging, flat RAM handling, and opcode parsing while fixing multiple calculation and flag-setting issues.
Introduce clearer boot ROM handling and streamline `execute_next_instruction` for better readability and accuracy. Add program counter (`pc`) updates within each instruction, improving program flow consistency.
Introduced `GameRom` struct and implemented support for MBC1 cartridges, including ROM and RAM banking. Modified `MemoryBus` and `CPU` to use `GameRom` for cartridge interactions, replacing raw game ROM handling. Added logic to load, read, and write cartridge memory based on type and address.
Introduced symbol files for various Game Boy systems (CGB, AGB, MGB, SGB) to define boot sequences and functionalities. Included CPU instruction behavior tests, with detailed coverage of standard operations and interrupt handling. Added documentation for test execution and internal framework operations.
This commit sets up a foundational CPU simulation with registers, a memory bus, and an initial instruction set implementation in Rust. It includes operations like ADD, SUB, AND, and bit manipulations, as well as basic project configurations through Cargo and IDE settings.
