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5349689 |
Apparatus for maintaining reset on microprocessor until after electrical chattering from connection of removable memory cartridge has ceased
An electric circuit device includes a connector for permitting removal and mounting of a cartridge with a circuit built therein, and a processor for performing operations and processing using the...
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5335329 |
Apparatus for providing DMA functionality to devices located in a bus expansion chassis
An expansion system for a bus-architecture system is disclosed, particularly for an SBus-compatible system. The expansion system includes a host expansion board which fits into one of the expansion...
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5325490 |
Method and apparatus for replacement of an original microprocessor with a replacement microprocessor in a computer system having a numeric processor extension
A method and apparatus that provides for the replacement of a first microprocessor with a second microprocessor in a microcomputer system. The method and apparatus allow the second microprocessor...
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5297272 |
Apparatus for automatically disabling and isolating a computer's original processor upon installation of a processor upgrade card
A system and method for upgrading a computer is disclosed. Certain essential chips present in the original computer system are functionally, but not physically, removed from the computer system....
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5293636 |
Module for insertion into a multi-module system having electronic keying for preventing power to improperly connected modules with improperly configured diode connections
A computer system with a number of subsystems or modules on separate circuit boards employs electronic keying to ensure proper configuration of these boards. A power key arrangement associated with...
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5257388 |
Device for detecting whether an attached external memory stores valid data, if not, whether the external memory is capable of storing data
In a data processing device capable of attachably and detachably providing an external memory unit to which data are written and from which data are read, the external memory unit being capable of...
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5140693 |
Display configuration setting system and method for preferentially setting extension display card
In a computer system having an extension slot capable of detachably receiving a display adapter board and display hardware controllers for plasma and CRT displays, respectively, the display...
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5056060 |
Printed circuit card with self-configuring memory system for non-contentious allocation of reserved memory space among expansion cards
A printed circuit board card adapted to fit into a slot and make electrical connections with cooperating terminals in the slot, the slot being disposed on the main circuit board of a personal...
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5038317 |
Programmable controller module rack with a relative rack slot addressing mechanism
A programmable controller includes a number of equipment racks having slots which receive a processor module and a plurality of input/output modules. Each rack has a backplane which includes a...
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4999805 |
Extended input/output circuit board addressing system
An extended addressing system for allowing use of existing circuit boards but obtaining more address space is disclosed. If given bits in the address value indicate that a former system board...
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4980821 |
Stock-memory-based writable instruction set computer having a single data bus
A computer is provided as an add-on board for attachment to a host computer. Included are a single data bus, a 16-bit arithmetic logic unit, a data stack, a return stack, a main program memory,...
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4954949 |
Universal connector device for bus networks in host computer/co-processor computer system
A connector device for use in communication of data between the central processing unit (CPU) bus of a host computer system and the CPU bus of a co-processor computer system, between the CPU bus of...
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4942550 |
Printed circuit board topography for high speed intelligent industrial controller with multiple boards located within a single slot
An industrial I/O controller is implemented on a processor board and includes two I/O daughter boards which are mounted on and parallel to the processor board by means of connectors such that the...
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4905182 |
Self-configuring memory management system with on card circuitry for non-contentious allocation of reserved memory space among expansion cards
A printed circuit board card adapted to fit into a slot and make electrical connections with cooperating terminals in the slot, the slot being disposed on the main circuit board of a personal...
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4716526 |
Multiprocessor system
A multiprocessor system used, for example, in a personal computer, wherein different types of microprocessors are used independently of the architecture of each microprocessor. The system includes...
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4701878 |
Apparatus for assigning addresses to pluggable modules based on contact configuration
In order to feed to pluggable electronic modules addresses for an address-controlled data exchange with a control unit, a module code characterizing the type of module is stored in each module in a...
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4649514 |
Computer revision port
Circuitry for automatically configuring the operating system software of a computer is disclosed. The circuitry includes a revision port which generates a unique eight-bit code indicating the...
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4635192 |
Self configuring bus structure for computer network
A computer bus structure includes a plurality of separate bus segments on a mother board. Plugging in of each of a plurality of interface boards automatically connects the right-hand portion of a...
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4556953 |
Interchangeable interface circuitry arrangements for use with a data processing system
The present disclosure is directed to an arrangement whereby any one of a plurality of different or similar interface circuit cards can be located into any one of a number of slots or holding means...
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4228498 |
Multibus processor for increasing execution speed using a pipeline effect
A computing apparatus having at least three buses and a plurality of elementary function modules in circuit connection therewith, provides increased execution speed by implementing a pipeline...
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4028682 |
Circuit arrangement for selecting the function of connection contacts on circuit chips
In a circuit arrangement composed of highly integrated chips for a microprogrammed data processing device of the type including an arithmetic and control unit, at least one read-only memory, at...
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