摘要:
Burst SRAMs designed for operation at a given data rate corresponding to the frequency of a first clock signal but capable of operation using a higher frequency clock signal. The burst SRAMs are preferably incorporated into the cache memory of a second level cache coupled to the processor bus in a computer system, where the computer system is preferably based on a 66-MHz P5 microprocessor. A cache controller, preferably incorporated within a memory controller, controls operation of the second level cache memory by providing the address load and address advance signals. The burst SRAMs are capable of recognizing the faster clock pulses, as well as the shorter pulses asserted on the address load and address advance signals. The address control signals are asserted and then negated during consecutive clock cycles of the faster clock signal, so that the burst SRAMs effectively operate at the same data rate corresponding to the lower frequency clock signal.
摘要:
An apparatus for monitoring and decoding processor bus cycles and flushing a second level cache upon decoding a special flush acknowledge cycle. The CPU preferably includes an internal cache and a flush input for receiving a signal commanding the CPU to flush its internal cache. After flushing its cache by performing any necessary cycles to write back dirty data to main memory, the CPU performs a special flush acknowledge cycle to inform external devices that the flush procedure has been completed. A cache controller detects the flush acknowledge cycle and provides a flush signal to the second level cache. The cache controller then provides an end of cycle signal to the CPU to indicate that the flush cycle has been acknowledged.
摘要:
A process for removing mercury or other metal impurities from elemental sulphur contaminated therewith includes mixing such elemental sulphur in a molten state with an aqueous sulphide solution or an aqueous solution of sufficiently high pH which reacts with elemental sulphur and forms a sulphide solution to cause extraction of mercury or other metal contaminants from the elemental sulphur into the aqueous sulphide solutions, and separating the aqueous sulphide solution containing mercury or other metal contaminants from the molten elemental sulphur to provide an elemental sulphur product substantially free from mercury and other metal contaminants.
摘要:
An apparatus for use in analyzing materials for ash content includes a walled chamber which retains microwave radiation therein, a source of microwave radiation, such as a magnetron, for radiating onto contents of such chamber, and an ashing furnace in the chamber which includes a heat resistant wall of low thermal conductivity, which is transmissive of microwave radiation, and a microwave absorptive material which is capable of being heated by microwave radiation to an ashing temperature. The furnace includes a passageway through it for the entry into the furnace cavity of a gas, such as air, and for venting gas, such as combustion products, from the furnace cavity, and preferably also includes a removable trapezoidally shaped door in a front wall thereof, which, when the chamber door is open, is readily removable from the furnace by hand, without burning the operator's fingers, despite the high internal temperature in the furnace cavity. Air flows through the chamber and around the furnace, helping to cool the exterior, of the furnace walls. It is preferred that the operation of the furnace and the ashing temperature be controlled by a combination of a temperature sensor, preferably a thermocouple, and a control mechanism, which turns the magnetron on and off as the temperature in the furnace cavity falls below or rises above a desired set temperature, respectively.
摘要:
An apparatus for determining cacheable address and write-protect memory address regions in a computer system which includes a programmable single-ended limit register and a single comparator to determine each such region. A programmable limit register associated with each respective memory address region defines a boundary limit for each of the respective memory regions. A single address comparator associated with each respective limit register determines whether a memory address developed by the computer system resides between the respective boundaries provided by the value stored in the respective programmable limit register and a predefined address. The use of a single limit register and a single address comparator for each memory address region reduces the gate count and decreases the input buffer loading in the logic circuitry.
摘要:
An adjunct call manager unit connects to a station set port of a telephone communication system and receives button identification and status signals to determine line, agent, and feature activation status of the system. In response to one or more of the received status signals, commands are sent to the system using button depression commands and switchhook commands to effectuate call processing control over the system. In one embodiment, the adjunct unit functions as an automated call distributor for managing incoming calls to the system.
摘要:
Apparatuses and processes are described for the automatic determinations of fat contents of foods, such as dairy products, e.g., milk, wherein automatic density and solids content determining apparatuses are employed, together with a computer, to determine the fat contents of food samples being tested. The density determining apparatus is preferably one which is electromagnetically excited to vibrate at its natural resonant frequency, so that from the change in such frequency, compared to a control, the mass of the sample may be determined. The means for measuring the solids content is preferably an automatic volatility computer in which electromagnetic radiation (microwave energy) is employed to drive off the volatile material (usually mostly water) in the sample, which is automatically weighed before and after such volatilization. Preferably, a microcomputer in the automatic volatility computer is employed to compute fat content from electronic feeds to it from the density and the solids content determining apparatuses.By use of the described apparatuses and processes rapid determinations of fat contents of materials may be made, facilitating modifications of production procedures to provide products of desired fat content, thereby preventing the production of off-specification materials and avoiding producing over-specification products which might otherwise be manufactured to avoid non-compliance with requirements for minimum fat contents of products.
摘要:
An apparatus for ashing materials which comprises a chamber, a source of microwave radiation for direction onto contents of the chamber, and in the chamber a support, such as a fused quartz pad or crucible, for the material to be ashed, and an ashing means of a stable microwave absorptive material, capable of being heated to high temperature by microwave radiation, such as a flat block of silicon carbide or a plurality of such blocks with openings therein to accommodate the crucible. The ashing means is in contact with the support for the material to be ashed and is capable of heating such support and such material to an ashing temperature. When a fused quartz fiber pad, preferably of the non-woven cloth type, is employed on top of and in contact with the ashing means of microwave absorptive material, as a support for the material to be ashed, it is preferred to cover such material with another such pad, which inhibits loss of the ash due to its being carried out of the chamber, as by an exhaust fan, while yet permitting the release of gases generated during the ashing process. Also disclosed are processes for ashing materials and for analyzing such materials for ash content, which processes may be practiced with the aid of the described apparatus.
摘要:
Apparatus is disclosed for reversing the bit order of a selected portion of a digital word. A first shifter is provided to shift the position of the unselected portion of the digital word to a set of terminals. The digital word, in bit reversed order, is coupled to an adjacent set of terminals. The two sets of terminals are fed to a second shifter which couples to the output thereof the digital word with the selected portion thereof in bit-reversed order. Such apparatus is adapted for use in addressing an FFT processor adapted to operate with different batch sizes to retrieve calculated frequency components in ascending order of frequency.
摘要:
Lenses are designed using the corneal topography or wavefront measurements of the eye derived by subtracting the optical power of the eye after orthokeratology treatment from the optical power before orthokeratology treatment.