immediately printing error message to chat log of the player that tried to start the computer if it happens during startup; also printing message if there's no ram; immediately checking power when starting computer (otherwise it'd be first checked in the next update)
added safety check to not trigger a new move while moving. shouldn't really happen, due to the execution delay / pause being applied when moving, but to be on the safe side...
also checking vanilla redstone wire in neighboring blocks even if doesn't connect directly (basically what BlockRedstoneLogic does)
moved scheduling of robot afterimage removal into added callback of afterimage block, to be on the safe(r) side