See also the official FAQ, and the github FAQ.
How do I Rotate?
- You can rotate a componet before it is placed with the hotkey, which by default is .
- A single placed component can be rotated the same way provided it is not connected to anything else.
- A group of connected componets and wire can be rotated by selecting, cutting, rotating and then pasting it. By default this is
-drag, , , - Any wire connection internal to the selection will be preserved.
- However this will break any wire connections (and watch links) between the selection and the rest of the circuit. You cannot rotate a selection without disconnecting it from the rest of the circuit.
What are the extra RAM input/outpus for?
They allow the RAM to load and store words wider than 64 bits on 64 bit wires.
RAM, Latency RAM and Fast RAM have 4 Input value and Output pins. Only the first is used when the data width is set to 8, 16, 32 or 64 bits. The first 2 are used when the data width is set to 128. All 4 are used when it is set to 256.