The Step command was removed in protocol cleanup, but step() still
referenced it. Using AdvanceInstructions (0x71) which is the correct
command for stepping.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
VICE stops emulation on first command and sends async events, but may
not process the command itself until fully stopped. This adds an
ensureStopped() mechanism that sends RegistersGet first to confirm
VICE is in stopped state before memory read/write operations.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Testing if VICE sends MemoryGet responses with matched ReqID
instead of as async events (ReqID=0xff).
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
VICE API v1 sends some responses (RegisterInfo, MemoryGet) as async
events with ReqID=0xff instead of matched responses. This caused
timeouts because we were waiting for responses with our request ID.
Fix: Match async responses (ReqID=0xff) to pending requests by
expected response type instead of request ID.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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>
Per KB docs, the actual protocol format is:
- Request: STX(1) + API(1) + Length(4) + ReqID(1) + Cmd(1) + Body (header = 8)
- Response: STX(1) + API(1) + Length(4) + Type(1) + Error(1) + ReqID(1) + Body (header = 9)
Previous fix incorrectly used 4-byte request IDs. Also added debug
logging to stderr to help diagnose protocol issues.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
The request ID field is 4 bytes (not 1), and the packet structure was
incorrect:
- Request: STX(1) + API(1) + Length(4) + ReqID(4) + Cmd(1) + Body
- Response: STX(1) + API(1) + Length(4) + Type(1) + Error(1) + ReqID(4) + Body
This was causing all commands after connect() to timeout because response
matching was reading the wrong bytes for the request ID.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
When npx installs from GitHub, it runs the prepare script to build.
Without this, dist/ doesn't exist and the bin entry fails.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Quick-start instructions for Claude Code users with the
`claude mcp add` command and manual config file option.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Covers installation (npm and GitHub), configuration, full tool reference,
example workflows, response format, architecture overview, and protocol
reference. Emphasizes semantic layer and agent-friendly design patterns.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Minor AX fix from owl's final review.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Protocol layer:
- Add DisplayGet command (0x84) for screen capture
- Add PaletteGet command (0x91) for color palette
- Implement getDisplay() and getPalette() client methods
New tools:
- screenshot: Capture display as indexed pixel data with palette
- Returns base64-encoded pixel buffer for efficient transfer
- Includes display dimensions and visible area bounds
- Optionally includes RGB palette values
- renderScreen: ASCII art representation of current display
- Converts pixel luminance to ASCII shading characters
- Configurable output dimensions and character set
- Useful for quick visual debugging in text-only contexts
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Protocol layer:
- Add watchpoint support (setWatchpoint, toggleCheckpoint, listWatchpoints)
- Add snapshot methods (saveSnapshot, loadSnapshot)
- Add autostart support
- Update command codes to match VICE binary monitor protocol
- Refactor BreakpointInfo to CheckpointInfo for unified handling
New tools:
- toggleBreakpoint: Enable/disable breakpoints without deleting
- setWatchpoint: Memory read/write watchpoints
- listWatchpoints: Show active watchpoints
- runTo: Run until specific address (temporary breakpoint)
- disassemble: 6502 disassembler with KERNAL/BASIC labels
- saveSnapshot/loadSnapshot: Machine state persistence
- loadProgram: Autostart PRG/D64/T64 files
Utilities:
- Add full 6502 disassembler with all addressing modes
- Include KERNAL/BASIC entry point labels
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- readScreen now supports format: "summary" | "full" option
- summary: non-empty lines with trimming (agent-friendly)
- full: all 25 lines (debugging use)
- readVicState now tracks sprite visibility:
- visibleSprites array with sprite numbers
- visibleCount for quick checking
- Updated hint when sprites enabled but not visible
AX feedback from owl review.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Fix status hint: clarify step() vs setBreakpoint+continue for pausing
- Add flag string to getRegisters: "NV-BDIZC" format (uppercase=set)
- Add listBreakpoints tool with local breakpoint tracking
- Track breakpoints in client for listing support
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- TypeScript project with tsup build
- MCP server with status, connect, disconnect tools (stubs)
- Uses zod for schema validation
- Builds and starts successfully
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
