Abstract: The invention comprises an interface for switching control of a memory management unit (MMU) between a central processing unit (CPU) having a register stack for storing data, and one or more coprocessors (COP) each having register stacks for storing data. The COP is operative when actuated to perform selected functions, not normally performed by the CPU, utilizing information in memory.

Abstract: A method of preparing a battery paste for a lead-acid storage battery comprising: (a) mixing a water dispersion of polyfluoroethylene with lead material, (b) adding an aqueous solution of sulfuric acid to the lead material-dispersion mix and mixing to form a paste having fibrillation developed therein, (c) controlling the amount of fibrillation developed in the paste, and (d) controlling the paste density for use in a battery plate. The method provides an improved paste which permits substantial reduction in plate weights and density and loss of active material in the grid structure due to plate shedding over a conventional lead-acid paste. The saving in active material ranges from 10 to 30% over a conventional lead-acid paste without reduction in battery performance.

Abstract: A primary seawater battery employs a metallic sheet anode and a sheet cathode. The cathode is lead chloride including an addition of about 1 to about 10 parts by weight of lead oxide per 100 parts by weight of lead chloride. The lead oxide may be litharge, litharge containing lead, red lead or lead peroxide. Other ingredients which may be present in the cathode are carbon black for conductivity and an organic binder such as polyfluoroethylene. The battery is characterized by having a shortened rise time compared to batteries without the lead oxide additive, especially when the battery is used at low temperatures.