摘要:
A data transfer method with peripheral precharge wherein a starting portion of an output data block targeted for a peripheral is transferred to an output buffer for the peripheral using programmed I/O or slave cycles and wherein a virtual address of the output data block is translated into a physical address while the peripheral begins transferring the starting portion from the output buffer and over an output path. A direct memory access operation by the peripheral transfers a remainder portion of the output data block into the output buffer.
摘要:
Method and system aspects control access through a synchronization primitive to a peripheral device in a processing system. A processing system in accordance with the present invention includes at least one central processing unit (CPU), and at least one peripheral device coupled to the at least one CPU, where the at least one peripheral device includes a synchronization primitive for controlling acquisition by at least one thread of execution from the at least one CPU. In a system aspect for controlling access, the system includes a circuit for sending a first signal from a component of the processing system to a synchronization primitive within the peripheral device to determine a state of the synchronization primitive, and acquiring control of the peripheral device when the synchronization primitive is in a released state. In a method for gaining control of a peripheral device in a processing system, the method includes sending a first signal from a component of the processing system to a semaphore register within the peripheral device to determine a bit pattern in the semaphore register, and acquiring control of the peripheral device when the semaphore register stores a first bit pattern.
摘要:
Describes a method of electrochemically converting amine hydrohalide, e.g., ethyleneamine hydrochloride, into free amine, e.g., free ethyleneamine. A three compartment electrolytic cell is provided having (1) a catholyte compartment containing a cathode assembly comprising a cathode and an anion exchange membrane, (2) an anode compartment containing an anode assembly comprising either (a) a hydrogen consuming gas diffusion anode and a current collecting electrode or (b) a hydrogen consuming gas diffusion anode which is fixedly held between a hydraulic barrier and a current collecting electrode, and (3) an intermediate compartment separated from the catholyte and anode compartments by the anion exchange membrane and either (i) the hydrogen consuming gas diffusion anode or (ii) the hydraulic barrier respectively. An aqueous solution of amine hydrohalide is charged to the catholyte compartment, while hydrogen gas is charged to the anode compartment and an aqueous conductive electrolyte solution is charged to the intermediate compartment. Direct current is passed through the electrolytic cell and an aqueous solution comprising free amine is removed from the catholyte compartment.
摘要:
Describes a method of electrochemically converting .alpha.-halohydrins, e.g., 1-chloro-2-hydroxypropane and 1,3-dichloro-2-hydroxypropane, to epoxides, e.g., propylene oxide and epichlorohydrin. A three compartment electrolytic cell is provided having (1) a catholyte compartment containing a cathode assembly comprising a cathode and anion exchange membrane, (2) an anolyte compartment containing an anode assembly comprising an anode and a cation exchange membrane, and (3) an intermediate compartment partitioned from the catholyte and anolyte compartments by the anion and cation exchange membranes respectively. An aqueous solution of .alpha.-halohydrin is charged to the catholyte compartment, while hydrogen halide solutions are charged to the intermediate and anolyte compartments. Direct current is passed through the electrolytic cell and an aqueous solution comprising epoxide is removed from the catholyte compartment.
摘要:
Method and system aspects properly enable and disable a function in a peripheral device. In a system aspect, the system includes a processing system, and a control mechanism within the peripheral device and coupled to the processing system, the control mechanism controlling enabling and disabling of a function in the peripheral device. The control mechanism further includes a decoder coupled to the processing system, and a counter coupled to the decoder. In a method aspect, the method includes receiving first and second control signals at a control mechanism in the peripheral device from at least one component in the processing system, and maintaining a state of the peripheral device at a predetermined level according to a value of the control mechanism, wherein the first and second control signals alter the value of the control mechanism.
摘要:
Cradle assembly comprises a breaker-engaging frame slidably coupled to an enclosure-engaging frame. The enclosure will have a rear wall provided with forwardly extending stationary terminals. The breaker will have rearwardly facing terminals aligned for engaging the stationary terminals. The rear wall of the enclosure is fixed relative to the side walls of the enclosure. The enclosure-engaging frame of the cradle assembly engages the side walls as the breaker is mounted to the breaker-engaging frame. The cradle assembly facilitates moving the breaker between a connected and disconnected position. In the connected position, the breaker terminals are engaged with the enclosure stationary terminals. In the disconnected position, the breaker terminals are disengaged and spaced from the stationary terminals.
摘要:
A reception indicator circuit is provided for use in an apparatus, wherein the apparatus enables a host system to receive information packets from a medium. The reception indicator circuit has a delay calculator, a byte count comparator and a signal asserter. The delay calculator selects and reads a reference delay value in one of N number of length-delay data storage elements. A reference length value contained in the one of N number of length-delay data storage elements corresponds to a length value of an information packet being received by the apparatus. The length value of the information packet is determined based on data in the information packet. The byte count comparator detects when the reference delay value number of bytes in the information packet have been received by the apparatus. The signal asserter asserts a reception indication signal when the byte count comparator detects that the reference delay value number of bytes in the information packet have been received by the apparatus. Alternatively, the reception indicator circuit may include a delay calculator that either calculates or selects an interrupt time. In such an alternate reception indicator circuit, the byte count comparator may be replaced by a delay comparator that determines when the interrupt time has elapsed. After the interrupt time has elapsed, the signal asserter asserts the reception indication signal. The apparatus may be a network peripheral, and the medium may be a communications network.
摘要:
Described is a method of electrochemically converting .alpha.-halohydrins, e.g., 1-chloro-2-hydroxypropane and 1,3-dichloro-2-hydroxypropane, to epoxides, e.g., propylene oxide and epichlorohydrin. A three compartment electrolytic cell is provided having (1) a catholyte compartment containing a cathode assembly comprising a cathode and an anion exchange membrane, (2) an anode compartment containing an anode assembly comprising either (a) a hydrogen consuming gas diffusion anode and a current collecting electrode or (b) a hydrogen consuming gas diffusion anode which is fixedly held between a hydraulic barrier and a current collecting electrode, and (3) an intermediate compartment separated from the catholyte and anode compartments by the anion exchange membrane and either (i) the hydrogen consuming gas diffusion anode or (ii) the hydraulic barrier respectively. An aqueous solution of .alpha.-halohydrin is charged to the catholyte compartment, while hydrogen gas is charged to the anode compartment and an aqueous electrolyte solution is charged to the intermediate compartment. Direct current is passed through the electrolytic cell and an aqueous solution comprising epoxide is removed from the catholyte compartment.
摘要:
Describes a method of electrochemically converting amine hydrohalide, e.g., ethyleneamine hydrochloride, into free amine, e.g., free ethyleneamine. A three compartment electrolytic cell is provided having (1) a catholyte compartment containing a cathode assembly comprising a cathode and anion exchange membrane, (2) an anolyte compartment containing an anode assembly comprising an anode and a cation exchange membrane, and (3) an intermediate compartment separated from the catholyte and anolyte compartments by the anion and cation exchange membranes respectively. An aqueous solution of amine hydrohalide is charged to the catholyte compartment, while hydrogen halide solutions are charged to the intermediate and anolyte compartments. Direct current is passed through the electrolytic cell and an aqueous solution comprising free amine is removed from the catholyte compartment.
摘要:
A drive mechanism for a circuit interrupter comprising a crank and lever pivotally interconnected by a resiliently yielding connecting rod assembly. The connecting rod assembly comprises a coil compression spring and first and second links slidably coupled together to compress the coil compression spring. Rotation of the crank in either direction causes the lever to drive the movable contact of the circuit interrupter into and out of engagement with the stationary contact. The coil compression spring is loaded under compression when the movable contact is driven into engagement with the stationary contact, storing and maintaining a mechanical static load on the movable contact for as long as the movable contact is engaged with the stationary contact.