Keyboard Firmware

By Xah Lee. Date: . Last updated: .

Things you need to know when shopping for a gaming keyboard or programable keyboard.

Firmware is software that's in the keyboard's memory. It controls the device.

All keyboards have firmware. The basic ones just send standard signals of the key when it is pressed.

Examples of Firmware Capabilities

Programable keyboards have firmware that can be configured or updated.

Here's list of what firmware can do:

  1. Remap keys for letter layout. Set any key to send other key. For example, create different layouts, such as Dvorak. [see Alternative Keyboard Layouts]
  2. Remap modifier keys. For example, make CapsLock send Ctrl, or swap Alt and Ctrl.
  3. Create new modifier key. For example, when Fn is held down, right hand home row keys become arrow keys.
  4. Create leader key. For example, press 【leader ' e】 to insert é. [see Alt Graph Key, Compose Key, Dead Key]
  5. Create lock key. For example, after CapsLock is pressed, right hand's keys become number pad keys. When CapsLock is pressed again, the lock is released.
  6. Create key macro. That is, send a key sequence. For example, make F2 send Ctrl+c (that's “copy” for most apps.) Useful for video games or professional tasks (in image editor, word processor, video editor, etc.).
  7. Create hold key. For example, when Space is held and other keys are pressed, it becomes Ctrl combination.

Note: not all programable keyboard has all these capabilities.

Advantage of Firmware over Operating System Keymapping

You can remap keys or create key macros via tools for the operating system (MacOS, linux, Microsoft Windows).

But reprogramable keyboard has the following advantages:

For example, say you want CapsLock to send Ctrl. With firmware, the CapsLock sends Ctrl directly to operating system.

With key remapping software in OS, the keyboard still sends CapsLock signal, the OS receives it, and changes it to Ctrl.

Problems with Key Remap by Operating System

  1. When you use the keyboard on another machine, you need to configure that machine first.
  2. In some app, it may not recognize the key remap by OS. For example, in some PC games, it ignores OS's key-remaps to prevent cheating, or in apps that require privilege such as Microsoft's regedit app. [see Microsoft Windows Registry Tutorial]
  3. When system boots, it doesn't recognize the remap. For example, in Linux bootstrap console or single-user mode. In Microsoft Windows laptop bootscreen, you may need to press a key to go into bios.

OS Level Key Remap Software

Different Firmware Capabilities

Firmware have different levels of power. Here's some differences.

• Most gaming keyboards have pre-set actions and key-remap features. You cannot remap arbitrary keys. For example, you cannot make Space key to do Ctrl.

Driverless Programable Keyboard

Some keyboards have driverless programing (aka on-board programing). That is, to program the key, you just press special keys or buttons on the keyboard. No need to launch a “driver” software to program the keys.

This is the best.

Example of such keyboard are:

On-Board Memory vs Cloud

Some keyboard makers force you to have internet connection or install their driver software, in order to use the keyboard as you configured it.

For example,

Razer Orbweaver Keypad forces you to install their “Razer Synapse”. You need to install it, and also register online, and also have internet connection, to use its key-programing features fully. [see Razer Orbweaver Keypad]

Many models of Corsair's Keyboard require you to have their driver software in order to use the keyboard. In particular, Corsair Gaming STRAFE RGB Keyboard. [see Corsair Keyboards]

Usually that means the keyboard is not usable in Linux. In some cases, the keyboard does not work at all in linux, or send weird handshake characters when plugged in.

Avoid any Razer or Corsair keyboards.

Logitech gaming keyboards are good. You still need to install the Windows software to program the keys. (Mac version is available too) But after that, you can use the keyboard on any machine without their “driver” software.

For great programable gaming keyboard with full linux compatibility, buy Roccat. Roccat keyboard

List of Programable Keyboards with Onboard Memory

Programable Keyboards with Onboard Memory

Programable Keyboard User Interface

Great programable firmware need a way to program it.

Here are different methods.

logitech gaming keyboard software 84134
Logitech's software for programing the keys. [see Logitech G910 Keyboard]
ergodox infinity configurator 2017 03 07
ergodox infinity configurator, as of 2017-03-07.

List of Keyboard with Great Firmware

Many expensive keyboards have powerful firmware.

Gaming keyboards usually focus on key macros, and profiles (which is a set of configurations, that you can switch to on-the-fly.). Gaming keyboard usually does not allow arbitrary key remap, nor creating dead keys, nor modifier key layers.

Gaming keyboard examples:

Programable keyboards usually focus on arbitrary remap of keys and key layers with modifier keys. But it usually does not have profiles feature.

Key Switch Topic

  1. Key Switch Mechanisms
  2. Noise Comparison
  3. What's NKRO, N-key Rollover?
  4. List of Keyboards with Topre Switch
  5. XMIT Hall Effect Switch
  6. Kailh Switch
  7. Mechanical Keyboard and RSI

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