Multiple fixes based on live testing:
- API version changed to 0x01 (VICE 3.x uses v1, not v2)
- Command codes updated per KB docs:
- RegistersGet: 0x22 (was 0x31)
- Continue: 0x31 (was 0x81)
- Step: 0x32 (was 0x82)
- Body length field now excludes ReqID and Cmd (just command body)
- Response parsing: totalLength = 9 + bodyLength
Added test script for debugging protocol issues.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
