arm7tdmi

This project's aim is to be an emulator of the arm7tdmi processor in c++20. The goal is to provide a library, providing a simple api for constructing, interfacing, and running an arm7tdmi cpu.

This project is in very early stages, and is a work in progress.

Currently:

• All ARM & THUMB instruction decoding is finished and tested
• Arm "Branch", "Branch and Exchange", "Block Data Transfer", are implemented. Branch instructions are tested.
• Basic memory interface is defined.

Building:

Currently builds with CMake (temporarily requires fmt):

cmake_minimum_required(VERSION 3.28)
set(CMAKE_CXX_STANDARD 20)

add_executable(app main.cpp)
target_link_libraries(app PRIVATE arm7tdmi fmt::fmt)

Tests:

• Tests can be enabled with CMake cache variable BUILD_TESTING set to On.
• Additionally, ARM_ASSEMBLER_PATH must be passed to cmake, in order to build and test with real ARM assembly. This expects a path to the bin folder of the ARM GNU Toolchain.
• Requires Version 10.3-2021.10 of the ARM GNU Toolchain. Later versions have been found to not support -march=armv4t, required to build executables for this architecture.

Resources:

• ARM7TDMI Instruction Set
• gbatek - Arm Cpu Overview