Patents

Collection of PS/2 and Micro Channel related patents held by IBM and other companies.

Gathered by Tomáš Slavotínek and Louis Ohland. Last update: 25 Sep 2020.


IBM

Patent No.,
Local PDF
Patent TitleGoogle PatentsSubject, Notes
EP0281999B1Data processing system with pluggable option card
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MCA/POS
EP0282637B1Computer system accepting feature cards
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MCA adapters
EP0283580B1Computer system with direct memory access channel arbitration
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EP0288607B1Computer system having a multi-channel direct memory access arbitration
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EP0343768B1Microcomputer system incorporating a cache subsystem using posted writes
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EP0343770B1Multi-bus microcomputer system with bus arbitration.
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EP0402054B1Command delivery for a computing system
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SCB
EP0419004B1Computer system with program loading apparatus and loading method
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IBL/IML
EP0426330B1Enclosure for a computer
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Model 85/95
EP0434267A2Shared hardware interrupt circuit for personal computers.
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MCA
EP0468625B1Personal computer system with protected storage for interface and system utility programs
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EP0472274A1Data processing apparatus having connectors to receive system components
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386SX/DX socket
EP0478119B1Personal computer system with interrupt controller
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EP0479428A1Data processing apparatus for dynamically setting timings in a dynamic memory system
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EP0508685A2Power-on control system for a computer.
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EP0511769A1Method and apparatus for processing interrupts in a computer system
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EP0517406A2Computer system for enabling a choice of error detection technologies
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EP0518504B1Personal computer with local bus arbitration
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EP0567237A1Method and apparatus for increasing usable memory space
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EP0576241A1Computer system and system expansion unit
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EP0654742A2Multiple bus interface
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ISA/MCA/PCMCIA
EP0656586A1Method and system for switching between a processor upgrade card and a planar processor
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EP0661632A1Booting of operating systems in computers
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EP0661638A1Method and apparatus for transferring data in a computer
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EP0661640A1System and method for accessing data in a computer system including a cache controller and a memory controller connected in parallel
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US4118611Buckling spring torsional snap actuator
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Model M K/B
US4692691Test system for keyboard interface circuit
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US4890219Mode conversion of computer commands
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US4901234AComputer system having programmable DMA control
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US5004866Self-contained grounding strip
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Model 85/95 chassis
US5008829Personal computer power supply
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Model 90/95 (and other)
US5021922Portable personal computer
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Model P70/P75
US5022077Apparatus and method for preventing unauthorized access to BIOS in a personal computer system
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US5032952Pivoting power supply
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Model 85/95 PSU
US5034917Computer system including a page mode memory with decreased access time and method of operation thereof
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US5038142Touch sensing display screen apparatus
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Touchselect
US5038239Integrated electronic card-frame assembly for a rigid disk drive
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US5038320Computer system with automatic initialization of pluggable option cards
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POS
US5043877Architecture converter for slave elements
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MCA to EISA adapter bridge
US5043931Wrap test system and method
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ACPA?
US5045998Method and apparatus for selectively posting write cycles using the 82385 cache controller
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80386/82385
US5047898Deflectable contact for providing positive surface contact for shielding electromagnetic interference
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US5051096Planar board support structure
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Model 85/95 planar
US5054360Method and apparatus for simultaneous output of digital audio and MIDI synthesized music
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ACPA?
US5063496Signaling attempted transfer to protected entry point BIOS routine
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US5067041Apparatus for reducing electromagnetic radiation from a computer device
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Model 85/95 chassis
US5083931Device grounding spring
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US5098175Removable guide apparatus for a rail-mounted device employed in a computer
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Model 85/95 chassis/DASD
US5100215Enclosure apparatus for retaining devices within a computer
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Model 85/95 chassis/DASD
US5109490Data transfer using bus address lines
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MCA: 64-bit streaming
US5109506Microcomputer system including a microprocessor reset circuit
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US5112119Support structure for devices in a computer apparatus
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Model 85/95 chassis/DASD
US5119498Feature board with automatic adjustment to one of two bus widths based on sensing power level at one connection contact
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MCA adapters
US5125080Logic support chip for at-type computer with improved bus architecture
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US5125084Control of pipelined operation in a microcomputer system employing dynamic bus sizing with 80386 processor and 82385 cache controller
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80386/82385
US5128995Apparatus and method for loading a system reference diskette image from a system partition in a personal computer system
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conv. partition, IBL/IML
US5129090System bus preempt for 80386 when running in an 80386/82385 microcomputer system with arbitration
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80386/82385
US5131082Command delivery for a computing system for transfers between a host and subsystem including providing direct commands or indirect commands indicating the address of the subsystem control block
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SCB
US5136465Personal computer with tandem air flow dual fans and baffle directed air cooling
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Model 90
US5136713Apparatus and method for decreasing the memory requirements for BIOS in a personal computer system
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2-stage IBL/IML
US5138706Password protected enhancement configuration register for addressing an increased number of adapter circuit boards with target machine emulation capabilities
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POS extension
US5142447Grounding apparatus for rail-mounted devices employed in a computer
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Model 85/95 DASD cage
US5146582Data processing system with means to convert burst operations into memory pipelined operations
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US5162979Personal computer processor card interconnect system
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Processor Complex
US5170471Command delivery for a computing system for transferring data between a host and subsystems with busy and reset indication
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SCB
US5170481Microprocessor hold and lock circuitry
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US5175822Apparatus and method for assigning addresses to SCSI supported peripheral devices
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Spock card edge?
US5175826Delayed cache write enable circuit for a dual bus microcomputer system with an 80386 and 82385
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80386/82385
US5185864Interrupt handling for a computing system with logical devices and interrupt reset
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SCB
US5187781Shared hardware interrupt circuit for personal computers
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US5187792Method and apparatus for selectively reclaiming a portion of RAM in a personal computer system
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US5191544Personal computer enclosure with shielding
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Model 90
US5193161Computer system having mode independent addressing
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US5193174System for automatically redirecting information to alternate system console in response to the comparison of present and default system configuration in personal computer system
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Model 85/95 serial console
US5210875Initial BIOS load for a personal computer system
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IBL/IML
US5214695Apparatus and method for loading a system reference diskette image from a system partition in a personal computer system
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IBL/IML
US5226134Data processing system including a memory controller for direct or interleave memory accessing
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complex
US5230052Apparatus and method for loading BIOS into a computer system from a remote storage location
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US5237676High speed data transfer system which adjusts data transfer speed in response to indicated transfer speed capability of connected device
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MCA: Streaming
US5237690System for testing adaptor card upon power up and having disablement, enablement, and reconfiguration options
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MCA: SLOTFLAG
US5241661DMA access arbitration device in which CPU can arbitrate on behalf of attachment having no arbiter
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US5245615Diagnostic system and interface for a personal computer
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US5265255Personal computer system with interrupt controller
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US5276864Personal computer with alternate system controller error detection
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US5280588Multiple input/output devices having shared address space
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US5287460Bus interface circuit for dual personal computer architecture peripheral adapter board
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US5287519LAN station personal computer system with controlled data access for normal and unauthorized users and method
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C2 security
US5289477Personal computer wherein ECC and parity error checking can be selectively chosen for memory elements installed in the system, memory elements enabling selective choice of error checking, and method
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US5293493Preemption control for central processor with cache
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US5299315Personal computer with programmable threshold FIFO registers for data transfer
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US5307482Computer, non-maskable interrupt trace routine override
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US5313592Method and system for supporting multiple adapters in a personal computer data processing system
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US5325264Device for removing a direct access storage device from a personal computer
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US5325492System for asynchronously delivering self-describing control elements with a pipe interface having distributed, shared memory
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US5327531Data processing system including corrupt flash ROM recovery
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US5327545Data processing apparatus for selectively posting write cycles using the 82385 cache controller
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80386/82385
US5329634Computer system with automatic adapter card setup
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POS for ISA
US5341422Trusted personal computer system with identification
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C2 security
US5353202Personal computer with shielding of input/output signals
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Model 90 (and other)
US5353417Personal computer with bus interface controller coupled directly with local processor and input/output data buses and for anticipating memory control changes on arbitration for bus access
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US5355489BIOS load for a personal computer system having a removable processor card
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Model 90/95
US5375084Selectable interface between memory controller and memory SIMMs
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US5379342Method and apparatus for providing enhanced data verification in a computer system
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US5379386Micro channel interface controller
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MCA
US5379400Method and system for determining memory refresh rate
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US5381538DMA controller including a FIFO register and a residual register for data buffering and having different operating modes
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T3+ complex
US5381541Computer system having planar board with single interrupt controller and processor card with plural processors and interrupt director
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Processor Complex
US5388156Personal computer system with security features and method
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C2 security
US5388228
US5506972
Computer system having dynamically programmable linear/fairness priority arbitration scheme
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US5396597System for transferring data between processors via dual buffers within system memory with first and second processors accessing system memory directly and indirectly
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US5404452Personal computer bus and video adapter for high performance parallel interface
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US5410699Apparatus and method for loading BIOS from a diskette in a personal computer system
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floppy IBL/IML
US5420760Microcomputer enclosure with interrupted wedge locking arrangement and shielding liner
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Model 90 (and other)
US5430847Method and system for extending system buses to external devices
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US5432939Trusted personal computer system with management control over initial program loading
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C2 security
US5432946LAN server personal computer with unattended activation capability
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remote pwr-on
US5446869Configuration and RAM/ROM control of PCI extension card residing on MCA adapter card
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MCA/PCI
US5446898Method and apparatus for configuring and installing a loadable ABIOS device support layer in a computer system
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US5450559Microcomputer system employing address offset mechanism to increase the supported cache memory capacity
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80386/82385
US5452429Error correction code on add-on cards for writing portions of data words
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US5459839System and method for managing queue read and write pointers
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US5459842System for combining data from multiple CPU write requests via buffers and using read-modify-write operation to write the combined data to the memory
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US5465357Method and apparatus for an automated dynamic load of an ABIOS device support layer in a computer system
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US5469577Providing alternate bus master other publications with multiple cycles of bursting access to local bus in a dual bus system including a processor local bus and a device communications bus
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Gearbox
US5471585Personal computer system with input/output controller having serial/parallel ports and a feedback line indicating readiness of the ports
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I/O controller
US5477242Display adapter for virtual VGA support in XGA native mode
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XGA
US5481709Method and apparatus for providing a modular ABIOS device support layer in a computer system
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US5481724Peer to peer computer-interrupt handling
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US5495611Method and apparatus for dynamic load of an ABIOS device support layer in a computer system
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US5499378Small computer system emulator for non-local SCSI devices
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US5504904Personal computer having operating system definition file for configuring computer system
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US5504905Apparatus for communicating a change in system configuration in an information handling network
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US5515474Audio I/O instruction interpretation for audio card
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ACPA?
US5522064Data processing apparatus for dynamically setting timings in a dynamic memory system
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US5524267Digital I/O bus controller circuit with auto-incrementing, auto-decrementing and non-incrementing/decrementing access data ports
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US5530887Methods and apparatus for providing automatic hardware device identification in computer systems that include multi-card adapters and/or multi-card planar complexes
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POS
US5537607Field programmable general purpose interface adapter for connecting peripheral devices within a computer system
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US5239631CPU bus allocation control
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US5539912Computer system having a selectable memory module presence detect information option
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US5544334Micro channel bus computer system with IDE hard drive interface
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Lacuna
US5553306Method and apparatus for controlling parallel port drivers in a data processing system
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US5555373Inactivity monitor for trusted personal computer system
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C2 security
US5557784Power on timer for a personal computer system
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US5568611Unauthorized access monitor
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Server 95
US5574786Securing trusted personal computer system against unauthorized movement
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Model 56/57, Model 76/77
US5586327Extended initialization for personal data processing systems
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IPL
US5634137Method and apparatus for updating system configuration based on open/closed state of computer housing cover
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US5644729Bidirectional data buffer for a bus-to-bus interface unit in a computer system
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T3+ complex
US5651139Protected system partition read/write access on a SCSI controlled DASD
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IBL/IML partition
US5655106Personal computer with riser connector for expansion bus and alternate master
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US5678019
US5829008
Real-time clock with extendable memory
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US5680288Hot plugging of an adapter card
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MCA
US5726922Assembly for removably connecting data storage devices
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Model 95A RAID bay
US5732280Method and apparatus for dynamically assigning programmable option select identifiers
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POS
US5742758Password protecting ROM based utilities in an adapter ROM
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US5754821Method and system for providing access to a protected partition of a memory device utilizing a passthru command
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IBL/IML partition
US5761533Computer system with varied data transfer speeds between system components and memory
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T3+ complex
US5765008Personal computer with riser card PCI and micro channel interface
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PC 700 riser
US5826075Automated programmable firmware store for a personal computer system
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flash update
US5873129Method and apparatus for extending physical system addressable memory
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US5878256Method and apparatus for providing updated firmware in a data processing system
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flash update
US5898857Method and system for interfacing an upgrade processor to a data processing system
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CPU upgrade
US5918007Trusted personal computer system with limited accessibility
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C2 security
US5980275Electronic circuit board interface mounting bracket
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MCA bracket
USD314195Front panel for a computer
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Model 95
USD339111Computer housing
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Model 85/95
USD362238Computer housing
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PC Server 500

ALR

Patent No.,
Local PDF
Patent TitleGoogle PatentsSubject, Notes
US5321827Computer system with modular upgrade capability
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Altera

Patent No.,
Local PDF
Patent TitleGoogle PatentsSubject, Notes
US5111423Programmable interface for computer system peripheral circuit card
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MCA interface chip

Chips and Technologies

Patent No.,
Local PDF
Patent TitleGoogle PatentsSubject, Notes
US4991085Personal computer bus interface chip with multi-function address relocation pins
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Future Domain

Patent No.,
Local PDF
Patent TitleGoogle PatentsSubject, Notes
US5434516Automatic SCSI termination circuit
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US5544326Interface and control circuit for regulating data flow in a SCSI initiator with multiple host bus interface selection
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18C50 (FD MCS-700 / IBM Patriot)
US5732223ASCSI host adapter with shared command and data buffer
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NCR

Patent No.,
Local PDF
Patent TitleGoogle PatentsSubject, Notes
US5379403Method and interface adapter for interfacing an ISA board to an MCA system by the issuance of an ILLINI-CDCHRDY signal from the interface adapter
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