摘要:
A portable computer and docking station combination, comprising first and second batteries and first and second battery charging circuit portions, with automatic sequencing of charging between the batteries. The system includes means for charging a first battery based on an amount of current flowing into the computer circuitry, and means for charging a second battery based on an amount of current flowing into the first battery and into the computer circuitry.
摘要:
An apparatus and method for caching SMRAM in an Intel.RTM. CPU employing system management mode. A cache for the CPU includes a plurality of data entries and an SMRAM status bit corresponding to each data entry. The SMRAM status bit is set if the data entry holds data in SMRAM, and reset if the data entry does not hold data in SMRAM. The SMRAM status bit distinguishes SMRAM data from system memory data in the cache, thereby eliminating cache coherency problems.
摘要:
A flat-panel display with fixtures in its sidewalls to enable support by lateral mounting members is disclosed. The advantage of this approach, in which the fixtures are essentially rotated around to the sides of the flat-panel display, is the reduction in the portion of the portable computer's top cover that is not the active display. In practice, this results in an increase in the size of the display that may be housed in the same-sized top cover. In order to accommodate the lateral mounting of the flat-panel display, metal brackets are used. These brackets extend from the base unit hinges and cradle the display. This adds torsional rigidity, but also removes the requirement that the back must be structural. Further reductions in the inactive portions of the top cover may be achieved by extending the ends of the display's fluorescent back-light beyond or through the metal rim that surrounds the display.
摘要:
A computer having a case has a connection point for a communications line, where the connection point is accessible from outside the case. A socket receives a standard communications hardware card, the hardware card having a first receptacle to electrically connect to circuits of the computer, and the hardware card having a second receptacle to electrically connect to an exterior electrical circuit, the exterior electrical circuit usually being exterior to the case. A mounting means attaches the socket to the computer, the mounting means positioning the socket to facilitate a connection to the second receptacle of the hardware card, the connection located wholly internal to the case. A multi wire connector electrically connects to the second receptacle of the hardware card, and the multi wire connector is located wholly internal to the case. At least one signal wire has a first end electrically connected to the multi wire connector, and the at least one signal wire has a second end electrically connected to the connection point, the at least one signal wire is located wholly internal to the case, and the at least one signal wire transfers communication signals between the connection point and the hardware card in order to connect the computer to the communications line. The multi wire connector which electrically connects to the second receptacle of the hardware card and is located wholly internally to the case may be located adjacent to an opening in the case, and the opening facilitates inserting the card into the socket. A cover is provided for the opening, the cover closes the case during normal operation of the computer, the cover is removed from the opening for the purpose of removing or inserting the card in the socket.
摘要:
A method and apparatus for selecting a particular node from a plurality of nodes connected to a common bus to allow the node to use the bus. The nodes have a pre-determined priority. After initially enabling the nodes, the bus is monitored for a bus idle condition. It is then determined which of the nodes are enabled message nodes, which are enabled nodes that have a message to send on the bus. There is then arbitration between the enabled message nodes after the bus is in the bus idle condition for a first period of time, such that the enabled message node having the highest pre-determined priority among the enabled message nodes is disabled for arbitration purposes, and also at the same time selects a target and performs a transfer. This procedure is repeated until all the enabled message nodes have been disabled. Thereafter, all of the nodes on the bus are enabled when the bus is in the bus idle condition for a second period of time, which is longer than the first period of time.
摘要:
A method and arrangement for preventing the locking out of devices which are coupled to a bus by either of two of the devices which have become initiator and target devices respectively. The devices arbitrate for control of the bus after the bus enters a bus free phase. The device which wins the arbitration becomes an initiator. A timer in each device on the bus is started upon the initiation of the arbitration. The initiator device is removed from the bus when an elasped time after the timers have been started reaches a pre-determined value. The distributed clock of the invention ensures that the devices coupled to the bus will clear the bus after the initiator has been on the bus for a pre-determined time, thereby obviating skew problems associated with single clocked systems.