Memory Toggle

The Memory Toggle is an automation gate that latches a signal state until it is changed by a separate input. It has a Set port and a Reset port, and is used when a circuit needs to remember a previous command instead of reacting only to the current input. Like other automation gates, it can be placed behind buildings and tiles, and it can occupy the same space as pipes or wires.

Its output follows a simple latch behavior: a green signal on Set turns the output green, and it stays green even if Set returns to red, until Reset receives a green signal. A green signal on Reset turns the output red, and it stays red until Set is triggered again. If both inputs are red, the output remains unchanged. If both inputs are green, Reset takes priority and the output becomes red. In short, the gate stores one bit of state and only changes when told to.

The truth table is straightforward:

• Set red, Reset red: unchanged
• Set green, Reset red: output green
• Set red, Reset green: output red
• Set green, Reset green: output red

When reading from Automation Ribbon, the Memory Toggle behaves the same way it does with Automation Wire activation. A 4-bit ribbon signal is interpreted using only its first bit, so a signal such as RGGG is treated as a red input.

A few placement details matter in compact automation layouts. Like the AND and OR gates, the fourth space shown on the Memory Toggle graphic has no port and does not block Automation Wires, so wires can pass through that space freely. This makes it easier to fit the gate into dense builds without rerouting the entire network.

The Memory Toggle is especially useful anywhere a circuit must alternate between two persistent states, or where a short activation pulse should keep a device enabled until a separate shutdown pulse arrives. Because it remembers its current output, it is a common choice for systems that need manual overrides, toggled machines, or simple on/off memory in automation designs.

It is also worth noting that filled Memorials can be deconstructed without recovering the body, and burying a dead Duplicant does not remove the Mourning effect. This is separate from the gate’s automation function, but it matters when the name is encountered in other contexts around memorial-related gameplay.