emu_control
Controls an openMSX emulator: launch, close, powerOn, powerOff, reset, getEmulatorSpeed, setEmulatorSpeed, machineList, extensionList, wait.
How to use it
emu_control is exposed by the MCP Openmsx MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), and the emu_control tool becomes available to the model automatically. See the full listing for setup details and every tool this server provides.
Install MCP Openmsx
npm install -g @nataliapc/mcp-openmsxOther tools in MCP Openmsx (17)
BASIC tools: isBasicAvailable, newProgram, runProgram, setProgram, getFullProgram, getFullProgramAdvanced, listProgramLines, deleteProgramLines.
Breakpoint management: create, remove, list.
Read/write CPU registers, CPU info, Stack pile, and Disassemble code: getCpuRegisters, getRegister, setRegister, getStackPile, disassemble, getActiveCpu.
RAM memory operations: selectedSlots, getBlock, readByte, readWord, writeByte, writeWord, searchBytes.
Control execution: break, isBreaked, continue, stepIn, stepOut, stepOver, stepBack, runTo.
VRAM operations: getBlock, readByte, writeByte, searchBytes.
Obtain informacion about the current emulated machine: getStatus, getSlotsMap, getIOPortsMap.
Send text or key combinations to emulator: sendText, sendKeyCombo.
Manage ROM, disk, and tape media: tapeInsert, tapeRewind, tapeEject, romInsert, romEject, diskInsert, diskInsertFolder, diskEject.
Controls emulation timeline: start, stop, status, goBack, absoluteGoto, advanceFrame, reverseFrame, truncate, saveReplay, loadReplay.
Save and restore machine states: load, save, list.
Manage VDP (Video Display Processor): getPalette, getRegisters, getRegisterValue, setRegisterValue, screenGetMode, screenGetFullText.
Retrieve MCP resources for MCP clients that don't support MCP resources.
Executes a native Tcl command in the connected openMSX instance. It is disabled by default and is registered only when the user sets OPENMSXENABLERAWTCL=true. Existing typed tools remain available and are preferred for operations they cover.
Export screen data as BASIC BSAVE instruction.
Capture emulator screen: asimage, tofile.
Hybrid search (semantic embeddings + BM25) over the local MSX documentation index, for information about MSX systems, cartridges, programming, and other development resources.