@ark-us/evm2wasm/tests/opcode/mstore8.json

This is a JS protope of a EVM to eWASM transcompiler

[
  {
    "op": "MSTORE8",
    "value": "0x53",
    "description": "mstore8",
    "in": {
      "stack": [
        "0x00000000000000000000000000000000000000000000000000000000000000ff",
        "0x0000000000000000000000000000000000000000000000000000000000000000"
      ],
      "memory": {
        "0": "0x4242000000000000000000000000000000000000000000000000000000004242"
      }
    },
    "out": {
      "stack": [],
      "memory": {
        "0": "0x42420000000000000000000000000000000000000000000000000000000042ff"
      }
    },
    "environment": {
      "callData": "0x00",
      "caller": "0x0000000000000000000000000000000000000000",
      "address": "0x0000000000000000000000000000000000000000",
      "coinbase": "0x0000000000000000000000000000000000000000"
    }
  }
]