摘要:
A computer system implements a standard modem without the use of a microcontroller. Instead, a digital signal processor is provided on an expansion card, but with direct links to the computer system itself. The code usually implemented in the microcontroller is instead implemented as a virtual modem controller to be called by the operating system of the computer itself. Further, this virtual modem controller includes a virtualized UART, that appears to the operating system software as a hardware UART, and the operating system driver software need not even have its input and output instructions replaced. Instead, debug registers are provided as breakpoints whenever an input/output instruction is executed to the I/O port range at which the UART would normally appear.
摘要:
This invention provides novel tetrazole intermediates of the formula ##STR1## wherein R.sup.1 and R.sup.4 each are independently hydrogen, halogen, C.sub.1-4 alkyl, C.sub.1-4 alkoxy or trifluoromethyl;R.sup.2,R.sup.3,R.sup.5 and R.sup.6 each are independently hydrogen, halogen, C.sub.1-4 alkyl or C.sub.1-4 alkoxy;B is hydrogen, C.sub.1-4 alkoxycarbonyl, CH.sub.2 Y or CH.sub.2 Z;Y is hydrogen, hydroxyl or X;Z is ##STR2## X is bromo, chloro or iodo; R.sup.10 is C.sub.1-4 alkyl; andR.sup.11 is phenyl which is unsubstituted or substituted by one or two C.sub.1-4 alkyl or chloro substituents.and processes thereof which are useful for the preparation of antihypercholesterolemic agents.
摘要:
A computer system implements a standard modem without the use of a microcontroller. Instead, a digital signal processor is provided on an expansion card, but with direct links to the computer system itself. The code usually implemented in the microcontroller is instead implemented as a virtual modem controller to be called by the operating system of the computer itself. Further, this virtual modem controller includes a virtualized UART, that appears to the operating system software as a hardware UART, with entry points for calls to replace input/output instructions. In this way, standard device driver code written to execute input/output operations is easily converted to operate with the “virtualized” UART.
摘要:
An electrically isolated high speed optical switching arrangement for use as a computer over-voltage sensing circuit utilizing first and second optoisolator devices, the first having an input, a first signal from the output of a bus sensing circuitry which provides two complementary outputs, with the output voltage of the optoisolator controlling power-down circuitry for the computer in response to an over-voltage condition. A second control optoisolator has its output in parallel with a resistor in the base to emitter path of the first optoisolator. The complementary signal of the bus-sensing circuitry provides the input to the second optoisolator. During normal power conditions, the first optoisolator is conductive and the second is non-conductive. As an over-voltage condition occurs, the second optoisolator is driven into conduction, thereby effectively providing a shunt across the resistor of the first optoisolator while the first optoisolator is shut off to instantaneously terminate conduction of the first optoisolator and provide an output signal to the power-down circuitry for shutting down the power in response to the over-voltage condition.
摘要:
A system and method for enabling multi-path functionality between a host bus adapter (HBA) in a host computer of a storage system and at least one storage device is disclosed. The host computer includes a processor and associated memory, and an operating system including a PnP manager that maintains a logical device stack for the storage device. An HBA-specific filter driver intercepts responses from the underlying HBA driver to specified PnP requests. These responses are modified to prevent standard Microsoft operating system SCSI class device drivers from being loaded for devices attached to the HBA. Instead, the modified responses cause a multi-path SCSI class device driver to be loaded. The filter driver also monitors the status of the paths to a device and, upon request, provides status information to the multi-path SCSI class device driver. The multi-path SCSI class driver may use this status information to decide whether to make a particular path a primary path. The actions required to make a path a primary path may be performed by the filter driver, e.g., through a function call to the filter driver initiated by the multi-path SCSI driver.
摘要:
A computer system implements a standard modem without the use of a microcontroller. Instead, a digital signal processor is provided on an expansion card, but with direct links to the computer system itself. The code usually implemented in the microcontroller is instead implemented as a virtual modem controller to be called by the operating system of the computer itself. Further, this virtual modem controller includes a virtualized UART, that appears to the operating system software as a hardware UART, with entry points for calls to replace input/output instructions. In this way, standard device driver code written to execute input/output operations is easily converted to operate with the "virtualized" UART.
摘要:
A computer system implements a standard modem without the use of a microcontroller. Instead, a digital signal processor is provided on an expansion card, but with direct links to the computer system itself. The code usually implemented in the microcontroller is instead implemented as a virtual modem controller to be called by the operating system of the computer itself. Further, this virtual modem controller includes a virtualized UART, that appears to the operating system software as a hardware UART, with entry points for calls to replace input/output instructions. In this way, standard device driver code written to execute input/output operations is easily converted to operate with the “virtualized” UART.
摘要:
Glycoproteins, especially glycosylated hemoglobins, are separated from non-glycosylated proteins, by complexing with a dihydroxyboryl reactive agent. The resulting complex can be separated physically from the non-glycosylated protein, making possible the determination of glycosylated hemoglobin content of lysed blood; a reactive agent and a kit are described for use in such determination and as a monitor in the control of diabetic treatment. The invention can also be used preparatively to isolate glycoproteins.
摘要:
Aminobutanoic acids of the following formula (I): ##STR1## where R.sup.1 -R.sup.5 are a variety of substituents, novel intermediates, a pharmaceutical composition for treating inflammatory diseases, demyelinating diseases, and tumor metastasis, methods for such treatment and processes for preparing compounds of formula (I).
摘要:
Compounds are described of the formula ##STR1## wherein: R.sup.1 is C.sub.3-6 alkyl or C.sub.1-3 alkylthioC.sub.1-3 alkyl;R.sup.2 is an optionally substituted C.sub.1-6 alkyl or C.sub.1-6 alkoxy group, aryl, heteroaryl, arylC.sub.1-4 alkyl, heteroarylC.sub.1-4 alkyl or a side-chain of a natural .alpha.-amino acid;R.sup.3 is hydrogen, C.sub.1-6 alkyl, CHR.sup.4 COR.sup.5 (where R.sup.4 is a side-chain of a natural .alpha.-amino acid and R.sup.5 is hydroxyl, C.sub.1-6 alkoxy or NHR.sup.6 where R.sup.6 represents a hydrogen atom or a C.sub.1-6 alkyl group) or a group (CH.sub.2).sub.n X (where n is 1 to 6 and X is hydroxyl, C.sub.1-4 alkoxy, heteroaryl or a group NR.sup.7 R.sup.8 where R.sup.7 and R.sup.8 are each hydrogen or C.sub.1-6 alkyl or the group NR.sup.7 R.sup.8 forms a 5 to 7 membered cyclic amine); andHet is an optionally substituted cyclic imide where the cyclic imide ring system has the formula (i), (ii) or (iii) ##STR2## in which A, B, C and D are each CH or 1 or 2 of A, B, C and D represents N and the others represent CH, and E and F may each independently represent CH or N; and physiologically acceptable salts and solvates thereof.These compounds inhibit metalloproteases involved in tissue degradation. Compounds of the invention may be formulated for use in a variety of conditions involving tissue degradation including arthropathy, dermatological conditions, bone resorption, inflammatory diseases, tumour invasion and multiple sclerosis and related diseases involving myelin degradation, and in the promotion of wound healing.