An inkjet printer cartridge has a printhead integrated circuit with a plurality of micro-electromechanical nozzle arrangements. A rotor element is rotatable, in use, between a blot position where the element blots the printhead integrated circuit, a seal position where the element seals the nozzle arrangements, and a platen position where the element supports and positions a printing medium proximate the printhead integrated circuit. An air distribution channel is configured to deliver air evenly along a length of the printhead and is communicable with a pressurized air supply. A plurality of reservoirs discretely store printing fluids for supply to the printhead integrated circuit. A refill port is arranged in fluid communication with printing fluid conduits each leading to a respective reservoir. The port facilitates refilling of the reservoirs from a refill cartridge. A power and data interface interfaces the cartridge with a controller board to control operation of the printhead integrated circuit and the rotor element.