Abstract: Dynamic random access memory page management is implemented for managing access to row address strobe pages by looking ahead to a next task in determining whether to open or close a memory page after an initial access.

Abstract: A shared resource access priority encoding/decoding and arbitration scheme takes into account varying device requirements, including latency, bandwidth and throughput. These requirements are stored and are dynamically updated based on changing access demand conditions.

Abstract: A memory controller circuit for use in a computer system provides memory address and control signals to a single in-line memory module (SIMM) connector. The SIMM connector can hold a SIMM that has dynamic random access memories (DRAMs) mounted on one or both sides. The SIMM connector provides a channel of signals to both sides of the SIMM. A driver associated with each channel receives a memory address and control signal. Each driver either drives a buffered memory signal to the associated channel or is placed in a high impedance state, depending upon whether a SIMM is in the SIMM connector. If a SIMM is in the connector, the driver associated with one of the channels is placed in the high impedance state if it is determined that the SIMM is single-sided. A programmable disabling means provides a driver enable signal to each driver. When the driver enable signal is asserted, the corresponding driver is in an enabled state. A deasserted driver enable signal places the corresponding driver in a disabled state.

Abstract: An apparatus and method for positioning a cursor on a video display having a horizontal blank time and a vertical blank time, where the cursor is addressed by a match position representing the cursor hot point relative to the origin of a pixel matrix, including cursor position registers for providing (x,y) cursor positioning coordinates; adders for adding to the (x,y) coordinates values representing the horizontal and vertical blank times respectively; and subtracting circuits for subtracting from the result values representing the horizontal and vertical match positions to provide the actual screen position at which the cursor is displayed. Accordingly, partial blanking and variable cursor hot points are supported in a manner transparent to the cursor positioning software.