Max-value Memory Cell

Stores the maximum value of every signal that the cell has ever received.

I'm attaching this to a rocket silo to keep track of every request by a space platform. I use that information to build train requests so that I always have items buffered to deliver to space.

Usage

• Input: Green wire on pole to the left
• Output: Red wire on pole to the right
• Reserved signals, used for internal computation
  • W & V are used in the ring buffer
  • R is used in the memory cell

How It Works

Components

There are 3 parts, separated by spaces in the blueprint:

1. 2-register ring buffer, the left section
   • Credit to Factorio forum users quyxkh and Medic5700
2. Addressable memory cell, the right section
   • Credit to Reddit user Potential-Carob-3058
3. 4 decider combinators, to determine maximum values

Flow

1. The ring buffer stores the last two states of the circuit.
2. The left two decider combinators look at the two ring buffer registers and determines the list of maximum values from the past two states
3. The right two decider combinators look at those max values and compares them against the contents of the memory cell, retaining each max value
4. That set of maximum signal values is then uploaded to the memory cell