Boots – shoes – and leggings
Patent
1994-12-15
1998-03-10
Gordon, Paul P.
Boots, shoes, and leggings
364134, 395474, G06F 1500
Patent
active
057268959
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to two computer systems, one for executing numerical control function and the other for preparing programs adapted to different machines, which are combined through a buffer so that the access from one computer system to the other and vice versa can readily be made available.
BACKGROUND ART
It is known that a computer-controlled numerical control apparatus (CNC apparatus) comprises one computer system section to perform functions relating to CNC (hereinafter referred to as CNC section) and the other computer system to create machining or processing programs adapted to individual machines such as machine tools or else (hereinafter referred to as personal computer section).
In a type of known CNC apparatuses, the circuit is composed so that the input/output signals of the CNC section are compatible with the input/output signals of the personal computer section in order for the necessary information such as the present position of the tool and input/output of the data to be readily exchanged between the CNC section and personal computer section.
Another type of apparatus comprises two buffers interposed between the CNC section and the personal computer section, with a shared RAM disposed between these two buffers, whereby signal exchange is executed between the CNC section and the personal computer section through this shared RAM.
However, the former conventional CNC apparatus, which is a type allowing the direct signal exchange between the CNC section and the personal computer section, requires a complicated circuit configuration which is, for example, used for making a judgement, prior to the signal exchange between the CNC section and the personal computer section, as to whether one is ready for transmitting signals and the other is in a condition for receiving the signals.
On the other hand, the latter conventional CNC apparatus, which is a type using a shared RAM for the exchange of signals between the CNC section and the personal computer section, requires an IC circuit such as a latch in addition to the shared RAM in order to control the alternate write/read operations into/from the shared RAM.
SUMMARY OF THE INVENTION
Thus, an object of the present invention is to combine the two computer systems, one for performing the CNC function of the computer-controlled numerical control apparatus and the other for preparing the programs adapted to the individual machines such as machine tools, in order to make possible the access from one computer system to the other and vice versa through buffer.
In order to accomplish the above object, a first aspect of the present invention provides combined two computer systems which comprise: a first computer system including a processor, a memory and other device; a second computer system similarly including a processor, a memory and other device; a buffer for connecting buses of the first and second computer systems; a processor operation controller for rendering the second computer system operative or inoperative in response to an input signal; and mediation circuit for monitoring an address outputted from the processor of the first computer system, judging which device of the first or second computer systems corresponds to the outputted address, and outputting a signal to the processor operation controller on the basis of the judgement, thereby allowing the first computer system to access the devices of the second computer system via the buffer.
Preferably, the buffer regulates the flow of a signal passing therethrough from one direction to the other or vice versa in response to a direction signal received, while the mediation circuit gives the buffer a direction signal in response to a read/write signal supplied from the first computer system, thereby enabling the first computer system to write information into the devices of the second computer system via the buffer or to read information stored in the devices of the second computer system.
A second aspect of the present invention provides combined two computer sys
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Hirohama Hideyuki
Kumakura Tatsuro
Fanuc Ltd.
Gordon Paul P.
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