SG16 | bit CPU architecture , with reference emulator

SG16 is a C# library. SG16 has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Instruction Cache SG16, as it currently stands, has no cache model at all. This is mostly because RAM latency isn't an issue for the intended application. This doesn't mean it couldn't benefit from a simple instruction cache, especially if it could allow more efficient ALU operation. For use with look-ahead and for speeding up tight instruction loops, a simple queue of recent and upcoming instructions would be sufficient. As instructions are read into the ALU, the would be copied into the queue simultaneously. If a GOTO/GOSUB/flow control statement redirect the Program Counter, the cache manager would continue loading instructions into the queue so the ALU wouldn't have to wait when it resumed moving forward. The biggest concern is with flow control statements that move the Program Counter outside of the existing cache, which would mean cache fragmentation, which would mean some form of garbage collection or defragmentation and a way of indexing the cache beyond a simple offset. The simplest solution so far is to just purge the cache anytime execution flow strays beyond the scope of the existing cache. This means the ALU would be waiting on RAM access until the cache rebuilds, but cache misses are inevitable anyway and a simple cache is better than none.