GPC 3

GPC 3 compiles .gpc3 source, runs .gbc3 bytecode, and applies optional .ipt Input Translator profiles in the Helios controller path. The plugin is included free with Helios and does not require an account.

Script Slots

GPC 3 provides one to eight configured slots. Use the add/remove controls to choose how many you need; at least one slot remains. Each slot remembers its script and optional Input Translator profile, including empty slots.

Step	Action
1	Select an existing numbered slot, or add one.
2	Right-click it and choose Select Script for `.gpc3` source or `.gbc3` bytecode. Source is compiled into the selected slot.
3	Optionally choose Select Input Translator and select an `.ipt` profile.
4	Click Connect.
5	Check the measured frequency and use Device Monitor to compare controller input and output.

GPC 3 runs at a fixed 1000 Hz. The frequency shown in the panel measures the VM loop, not device polling or console receipt. It is not a selectable setting.

Selecting another slot while connected activates its contents. A slot can contain a script, a translator, both, or neither. A translator-only slot applies its mappings without a script. Selecting an empty slot stops the active contents while leaving GPC 3 connected.

Wait for a connection, compilation, or slot change to finish before making another change. Right-click a slot to clear its script or translator. Use Restart VM to reconnect and reload the selected slot, or Disconnect to stop GPC 3.

Recompile older .gpc3 sources with the current Helios release. Bytecode from an earlier GPC3 format is intentionally not loaded as though it were current.

Drag and Drop

You can drag compatible files from File Explorer or Online Resources directly onto a slot:

.gpc3: compiles and loads into that slot;
.gbc3: loads as bytecode;
.ipt: becomes the slot's Input Translator profile.

Imported .gbc3 bytecode must be no larger than 4 MiB. Imported .ipt profiles must be no larger than 1 MiB.

Compile a Script

Assign a .gpc3 source file to a slot using Select Script... or drag and drop. File Explorer → Compile into GPC 3 Slot targets the current slot. Compilation is part of the slot workflow and does not require Developer Mode. Compiler messages appear in Output Panel.

Input Translator Profiles

Create and edit .ipt profiles in Input Translator. A profile can remap controller, keyboard, and mouse controls and provide Helios Pulse mouse-to-stick tuning. Select the finished profile in the desired GPC 3 slot rather than editing its file contents manually.

Troubleshooting

Compile fails: use the exact signatures in the GPC3 documentation and review Output Panel.
Script is missing: select the intended slot, then choose it again or drag the file from File Explorer.
Translator is missing: clear it or select an existing .ipt file.
Slot cannot be changed: wait for the current connection, compilation, or selection operation to finish.
Connected but no script runs: check the selected slot; empty and translator-only slots do not run a controller script.
Measured frequency is low: close unnecessary high-rate tools and check overall system load.
Script runs but output does not change: verify the input and destination paths in Device Monitor.