Abstract:
A computer system maintains and updates a status register (102, 107) in response to signals containing status information received from several peripheral devices (110, 120, 130), and generates an interrupt to a processor (100). When the processor (100) sevices the interrupt, the processor (100) merely reads the status register (102) to determine which peripheral device requires processing. This is a very fast operation because the status register (102) is internal to the processor (100) or core logic (103). No time consuming polling of peripheral devices (110, 120, 130) is required to determine the status of the peripheral device.
Abstract:
A DRAM includes a register storing subsets of row addresses corresponding to rows containing at least one memory cell that is unable to store a data bit during a normal refresh cycle. Each subset includes all but the most significant bit of a corresponding row address. A refresh counter in the DRAM generates refresh row addresses that are used to refresh rows of memory cells. The refresh row addresses are compared to the subsets of row addresses that are stored in the register. In the event of a match, the row of memory cells corresponding to the matching subset of bits is refreshed. The number of refreshes occurring each refresh cycle will depend upon the number of bits in the subset that are omitted from the row address. The memory cells that are unable to retain data bits are identified by a modified sense amplifier.
Abstract:
A computer system and method is described for improved storage of computer system configuration information. A ROM module includes both a BIOS ROM portion and a configuration ROM portion. The configuration ROM includes a backup copy of the system configuration parameters stored in a battery-powered configuration CMOS RAM. If the configuration CMOS RAM fails to provide valid configuration data, the contents of the configuration ROM are used to configure the computer system. If the contents of the configuration ROM are also invalid, default configuration values are provided by the BIOS ROM. User modification of the default values may be effected through a setup utility program, and the configuration ROM then programmed accordingly.
Abstract:
Disclosed are systems and methods for managing memory. A memory management system may include a table having multiple virtual memory addresses. Each virtual memory address may correspond to a physical memory address and data that identifies a type of memory device corresponding to the physical memory address. The physical memory device can be used to access the memory device when a table hit occurs.
Abstract:
A processor-based system includes a processor coupled to core logic through a processor bus. This includes a dynamic random access memory (“DRAM”) memory buffer controller. The DRAM memory buffer controller is coupled through a memory bus to a plurality of a dynamic random access memory (“DRAM”) modules and a flash memory module, which are at the same hierarchical level from the processor. Each of the DRAM modules includes a memory buffer to the memory bus and to a plurality of dynamic random access memory devices. The flash memory module includes a flash memory buffer coupled to the memory bus and to at least one flash memory device. The flash memory buffer includes a DRAM-to-flash memory converter operable to convert the DRAM memory requests to flash memory requests, which are then applied to the flash memory device.
Abstract:
Examples of the present disclosure provide apparatuses and methods related to generating and executing a control flow. An example apparatus can include a first device configured to generate control flow instructions, and a second device including an array of memory cells, an execution unit to execute the control flow instructions, and a controller configured to control an execution of the control flow instructions on data stored in the array.
Abstract:
A computer system maintains and updates a status register (102, 107) in response to signals containing status information received from several peripheral devices (110, 120, 130), and generates an interrupt to a processor (100). When the processor (100) sevices the interrupt, the processor (100) merely reads the status register (102) to determine which peripheral device requires processing. This is a very fast operation because the status register (102) is internal to the processor (100) or core logic (103). No time consuming polling of peripheral devices (110, 120, 130) is required to determine the status of the peripheral device.