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.
Patent No.,
Local PDF | Patent Title | Google Patents | Subject, Notes |
|---|
| EP0281999B1 | Data processing system with pluggable option card | link | MCA/POS |
| EP0282637B1 | Computer system accepting feature cards | link | MCA adapters |
| EP0283580B1 | Computer system with direct memory access channel arbitration | link | |
| EP0288607B1 | Computer system having a multi-channel direct memory access arbitration | link | |
| EP0343768B1 | Microcomputer system incorporating a cache subsystem using posted writes | link | |
| EP0343770B1 | Multi-bus microcomputer system with bus arbitration. | link | |
| EP0402054B1 | Command delivery for a computing system | link | SCB |
| EP0419004B1 | Computer system with program loading apparatus and loading method | link | IBL/IML |
| EP0426330B1 | Enclosure for a computer | link | Model 85/95 |
| EP0434267A2 | Shared hardware interrupt circuit for personal computers. | link | MCA |
| EP0468625B1 | Personal computer system with protected storage for interface and system utility programs | link | |
| EP0472274A1 | Data processing apparatus having connectors to receive system components | link | 386SX/DX socket |
| EP0478119B1 | Personal computer system with interrupt controller | link | |
| EP0479428A1 | Data processing apparatus for dynamically setting timings in a dynamic memory system | link | |
| EP0508685A2 | Power-on control system for a computer. | link | |
| EP0511769A1 | Method and apparatus for processing interrupts in a computer system | link | |
| EP0517406A2 | Computer system for enabling a choice of error detection technologies | link | |
| EP0518504B1 | Personal computer with local bus arbitration | link | |
| EP0567237A1 | Method and apparatus for increasing usable memory space | link | |
| EP0576241A1 | Computer system and system expansion unit | link | |
| EP0654742A2 | Multiple bus interface | link | ISA/MCA/PCMCIA |
| EP0656586A1 | Method and system for switching between a processor upgrade card and a planar processor | link | |
| EP0661632A1 | Booting of operating systems in computers | link | |
| EP0661638A1 | Method and apparatus for transferring data in a computer | link | |
| EP0661640A1 | System and method for accessing data in a computer system including a cache controller and a memory controller connected in parallel | link | |
| US4118611 | Buckling spring torsional snap actuator | link | Model M K/B |
| US4692691 | Test system for keyboard interface circuit | link | |
| US4890219 | Mode conversion of computer commands | link | |
| US4901234A | Computer system having programmable DMA control | link | |
| US5004866 | Self-contained grounding strip | link | Model 85/95 chassis |
| US5008829 | Personal computer power supply | link | Model 90/95 (and other) |
| US5021922 | Portable personal computer | link | Model P70/P75 |
| US5022077 | Apparatus and method for preventing unauthorized access to BIOS in a personal computer system | link | |
| US5032952 | Pivoting power supply | link | Model 85/95 PSU |
| US5034917 | Computer system including a page mode memory with decreased access time and method of operation thereof | link | |
| US5038142 | Touch sensing display screen apparatus | link | Touchselect |
| US5038239 | Integrated electronic card-frame assembly for a rigid disk drive | link | |
| US5038320 | Computer system with automatic initialization of pluggable option cards | link | POS |
| US5043877 | Architecture converter for slave elements | link | MCA to EISA adapter bridge |
| US5043931 | Wrap test system and method | link | ACPA? |
| US5045998 | Method and apparatus for selectively posting write cycles using the 82385 cache controller | link | 80386/82385 |
| US5047898 | Deflectable contact for providing positive surface contact for shielding electromagnetic interference | link | |
| US5051096 | Planar board support structure | link | Model 85/95 planar |
| US5054360 | Method and apparatus for simultaneous output of digital audio and MIDI synthesized music | link | ACPA? |
| US5063496 | Signaling attempted transfer to protected entry point BIOS routine | link | |
| US5067041 | Apparatus for reducing electromagnetic radiation from a computer device | link | Model 85/95 chassis |
| US5083931 | Device grounding spring | link | |
| US5098175 | Removable guide apparatus for a rail-mounted device employed in a computer | link | Model 85/95 chassis/DASD |
| US5100215 | Enclosure apparatus for retaining devices within a computer | link | Model 85/95 chassis/DASD |
| US5109490 | Data transfer using bus address lines | link | MCA: 64-bit streaming |
| US5109506 | Microcomputer system including a microprocessor reset circuit | link | |
| US5112119 | Support structure for devices in a computer apparatus | link | Model 85/95 chassis/DASD |
| US5119498 | Feature board with automatic adjustment to one of two bus widths based on sensing power level at one connection contact | link | MCA adapters |
| US5125080 | Logic support chip for at-type computer with improved bus architecture | link | |
| US5125084 | Control of pipelined operation in a microcomputer system employing dynamic bus sizing with 80386 processor and 82385 cache controller | link | 80386/82385 |
| US5128995 | Apparatus and method for loading a system reference diskette image from a system partition in a personal computer system | link | conv. partition, IBL/IML |
| US5129090 | System bus preempt for 80386 when running in an 80386/82385 microcomputer system with arbitration | link | 80386/82385 |
| US5131082 | Command 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 | link | SCB |
| US5136465 | Personal computer with tandem air flow dual fans and baffle directed air cooling | link | Model 90 |
| US5136713 | Apparatus and method for decreasing the memory requirements for BIOS in a personal computer system | link | 2-stage IBL/IML |
| US5138706 | Password protected enhancement configuration register for addressing an increased number of adapter circuit boards with target machine emulation capabilities | link | POS extension |
| US5142447 | Grounding apparatus for rail-mounted devices employed in a computer | link | Model 85/95 DASD cage |
| US5146582 | Data processing system with means to convert burst operations into memory pipelined operations | link | |
| US5162979 | Personal computer processor card interconnect system | link | Processor Complex |
| US5170471 | Command delivery for a computing system for transferring data between a host and subsystems with busy and reset indication | link | SCB |
| US5170481 | Microprocessor hold and lock circuitry | link | |
| US5175822 | Apparatus and method for assigning addresses to SCSI supported peripheral devices | link | Spock card edge? |
| US5175826 | Delayed cache write enable circuit for a dual bus microcomputer system with an 80386 and 82385 | link | 80386/82385 |
| US5185864 | Interrupt handling for a computing system with logical devices and interrupt reset | link | SCB |
| US5187781 | Shared hardware interrupt circuit for personal computers | link | |
| US5187792 | Method and apparatus for selectively reclaiming a portion of RAM in a personal computer system | link | |
| US5191544 | Personal computer enclosure with shielding | link | Model 90 |
| US5193161 | Computer system having mode independent addressing | link | |
| US5193174 | System for automatically redirecting information to alternate system console in response to the comparison of present and default system configuration in personal computer system | link | Model 85/95 serial console |
| US5210875 | Initial BIOS load for a personal computer system | link | IBL/IML |
| US5214695 | Apparatus and method for loading a system reference diskette image from a system partition in a personal computer system | link | IBL/IML |
| US5226134 | Data processing system including a memory controller for direct or interleave memory accessing | link | complex |
| US5230052 | Apparatus and method for loading BIOS into a computer system from a remote storage location | link | |
| US5237676 | High speed data transfer system which adjusts data transfer speed in response to indicated transfer speed capability of connected device | link | MCA: Streaming |
| US5237690 | System for testing adaptor card upon power up and having disablement, enablement, and reconfiguration options | link | MCA: SLOTFLAG |
| US5241661 | DMA access arbitration device in which CPU can arbitrate on behalf of attachment having no arbiter | link | |
| US5245615 | Diagnostic system and interface for a personal computer | link | |
| US5265255 | Personal computer system with interrupt controller | link | |
| US5276864 | Personal computer with alternate system controller error detection | link | |
| US5280588 | Multiple input/output devices having shared address space | link | |
| US5287460 | Bus interface circuit for dual personal computer architecture peripheral adapter board | link | |
| US5287519 | LAN station personal computer system with controlled data access for normal and unauthorized users and method | link | C2 security |
| US5289477 | Personal 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 | link | |
| US5293493 | Preemption control for central processor with cache | link | |
| US5299315 | Personal computer with programmable threshold FIFO registers for data transfer | link | |
| US5307482 | Computer, non-maskable interrupt trace routine override | link | |
| US5313592 | Method and system for supporting multiple adapters in a personal computer data processing system | link | |
| US5325264 | Device for removing a direct access storage device from a personal computer | link | |
| US5325492 | System for asynchronously delivering self-describing control elements with a pipe interface having distributed, shared memory | link | |
| US5327531 | Data processing system including corrupt flash ROM recovery | link | |
| US5327545 | Data processing apparatus for selectively posting write cycles using the 82385 cache controller | link | 80386/82385 |
| US5329634 | Computer system with automatic adapter card setup | link | POS for ISA |
| US5341422 | Trusted personal computer system with identification | link | C2 security |
| US5353202 | Personal computer with shielding of input/output signals | link | Model 90 (and other) |
| US5353417 | Personal 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 | link | |
| US5355489 | BIOS load for a personal computer system having a removable processor card | link | Model 90/95 |
| US5375084 | Selectable interface between memory controller and memory SIMMs | link | |
| US5379342 | Method and apparatus for providing enhanced data verification in a computer system | link | |
| US5379386 | Micro channel interface controller | link | MCA |
| US5379400 | Method and system for determining memory refresh rate | link | |
| US5381538 | DMA controller including a FIFO register and a residual register for data buffering and having different operating modes | link | T3+ complex |
| US5381541 | Computer system having planar board with single interrupt controller and processor card with plural processors and interrupt director | link | Processor Complex |
| US5388156 | Personal computer system with security features and method | link | C2 security |
US5388228
US5506972 | Computer system having dynamically programmable linear/fairness priority arbitration scheme | link | |
| US5396597 | System for transferring data between processors via dual buffers within system memory with first and second processors accessing system memory directly and indirectly | link | |
| US5404452 | Personal computer bus and video adapter for high performance parallel interface | link | |
| US5410699 | Apparatus and method for loading BIOS from a diskette in a personal computer system | link | floppy IBL/IML |
| US5420760 | Microcomputer enclosure with interrupted wedge locking arrangement and shielding liner | link | Model 90 (and other) |
| US5430847 | Method and system for extending system buses to external devices | link | |
| US5432939 | Trusted personal computer system with management control over initial program loading | link | C2 security |
| US5432946 | LAN server personal computer with unattended activation capability | link | remote pwr-on |
| US5446869 | Configuration and RAM/ROM control of PCI extension card residing on MCA adapter card | link | MCA/PCI |
| US5446898 | Method and apparatus for configuring and installing a loadable ABIOS device support layer in a computer system | link | |
| US5450559 | Microcomputer system employing address offset mechanism to increase the supported cache memory capacity | link | 80386/82385 |
| US5452429 | Error correction code on add-on cards for writing portions of data words | link | |
| US5459839 | System and method for managing queue read and write pointers | link | |
| US5459842 | System for combining data from multiple CPU write requests via buffers and using read-modify-write operation to write the combined data to the memory | link | |
| US5465357 | Method and apparatus for an automated dynamic load of an ABIOS device support layer in a computer system | link | |
| US5469577 | Providing 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 | link | Gearbox |
| US5471585 | Personal computer system with input/output controller having serial/parallel ports and a feedback line indicating readiness of the ports | link | I/O controller |
| US5477242 | Display adapter for virtual VGA support in XGA native mode | link | XGA |
| US5481709 | Method and apparatus for providing a modular ABIOS device support layer in a computer system | link | |
| US5481724 | Peer to peer computer-interrupt handling | link | |
| US5495611 | Method and apparatus for dynamic load of an ABIOS device support layer in a computer system | link | |
| US5499378 | Small computer system emulator for non-local SCSI devices | link | |
| US5504904 | Personal computer having operating system definition file for configuring computer system | link | |
| US5504905 | Apparatus for communicating a change in system configuration in an information handling network | link | |
| US5515474 | Audio I/O instruction interpretation for audio card | link | ACPA? |
| US5522064 | Data processing apparatus for dynamically setting timings in a dynamic memory system | link | |
| US5524267 | Digital I/O bus controller circuit with auto-incrementing, auto-decrementing and non-incrementing/decrementing access data ports | link | |
| US5530887 | Methods and apparatus for providing automatic hardware device identification in computer systems that include multi-card adapters and/or multi-card planar complexes | link | POS |
| US5537607 | Field programmable general purpose interface adapter for connecting peripheral devices within a computer system | link | |
| US5239631 | CPU bus allocation control | link | |
| US5539912 | Computer system having a selectable memory module presence detect information option | link | |
| US5544334 | Micro channel bus computer system with IDE hard drive interface | link | Lacuna |
| US5553306 | Method and apparatus for controlling parallel port drivers in a data processing system | link | |
| US5555373 | Inactivity monitor for trusted personal computer system | link | C2 security |
| US5557784 | Power on timer for a personal computer system | link | |
| US5568611 | Unauthorized access monitor | link | Server 95 |
| US5574786 | Securing trusted personal computer system against unauthorized movement | link | Model 56/57, Model 76/77 |
| US5586327 | Extended initialization for personal data processing systems | link | IPL |
| US5634137 | Method and apparatus for updating system configuration based on open/closed state of computer housing cover | link | |
| US5644729 | Bidirectional data buffer for a bus-to-bus interface unit in a computer system | link | T3+ complex |
| US5651139 | Protected system partition read/write access on a SCSI controlled DASD | link | IBL/IML partition |
| US5655106 | Personal computer with riser connector for expansion bus and alternate master | link | |
US5678019
US5829008 | Real-time clock with extendable memory | link | |
| US5680288 | Hot plugging of an adapter card | link | MCA |
| US5726922 | Assembly for removably connecting data storage devices | link | Model 95A RAID bay |
| US5732280 | Method and apparatus for dynamically assigning programmable option select identifiers | link | POS |
| US5742758 | Password protecting ROM based utilities in an adapter ROM | link | |
| US5754821 | Method and system for providing access to a protected partition of a memory device utilizing a passthru command | link | IBL/IML partition |
| US5761533 | Computer system with varied data transfer speeds between system components and memory | link | T3+ complex |
| US5765008 | Personal computer with riser card PCI and micro channel interface | link | PC 700 riser |
| US5826075 | Automated programmable firmware store for a personal computer system | link | flash update |
| US5873129 | Method and apparatus for extending physical system addressable memory | link | |
| US5878256 | Method and apparatus for providing updated firmware in a data processing system | link | flash update |
| US5898857 | Method and system for interfacing an upgrade processor to a data processing system | link | CPU upgrade |
| US5918007 | Trusted personal computer system with limited accessibility | link | C2 security |
| US5980275 | Electronic circuit board interface mounting bracket | link | MCA bracket |
| USD314195 | Front panel for a computer | link | Model 95 |
| USD339111 | Computer housing | link | Model 85/95 |
| USD362238 | Computer housing | link | PC Server 500 |