Abstract: Disclosed is a method for attaching SCSI tape devices which may only read in a forward direction to an S/390 compatible computer system. This involves translating S/390 I/O operations for channel communication by emulating an S/390 "Read Backwards" channel command with a single "Read Backwards" routine to be used for all SCSI tape drives regardless of read capabilities in the backward direction. The emulation of a S/390 "Read Backwards" channel command includes using a combination of existing tape positioning commands, including: the RF (Read Forward) command, parsing technique to obtain the appropriate bytes to be stored into memory, and calculation for the residual byte count.

Abstract: An upgradable Pentium-based mobile processor module that is forward-compatible with an enhanced Pentium II-based mobile processor module. The upgradable Pentium-based mobile processor module uses 0.5 millimeter pitch connection technology and contains a system controller that supports a single peripheral component interconnect port. The upgradable Pentium-based mobile processor module provides a PCI port for connection to a PCI bus and an AGP port for connection to an AGP bus. The AGP port is electronically connected to the PCI port so that both the AGP port and the PCI port receive data and control signals from the system controller according to the PCI protocol standard.

Abstract: A system management mode (SMM) of operating a processor includes only a basic set of hardwired hooks or mechanisms in the processor for supporting SMM. Most of SMM functionality, such as the processing actions performed when entering and exiting SMM, is "soft" and freely defined. A system management interrupt (SMI) pin is connected to the processor so that a signal on the SMI pin causes the processor to enter SMM mode. SMM is completely transparent to all other processor operating software. SMM handler code and data is stored in memory that is protected and hidden from normal software access.

Abstract: The invention configures an asynchronous system to emulate a synchronous system. When an application initiates a synchronous transaction, the synchronous transaction is received by a synchronous interface. The synchronous interface, in turn, simulates a synchronous system while performing an asynchronous transaction. In one embodiment, the synchronous emulation ensures that the asynchronous transaction is completed within a configurable maximum time duration. If the asynchronous transaction has not been completed with within the defined maximum time duration, the synchronous emulation notifies the application that the desired data is not available. In another embodiment, the synchronous eumlation re-executes failed asynchronous transactions.

Abstract: An emulator system solving a problem of conventional emulator systems by recognizing a task execution history. In conventional systems, it was necessary for a microcomputer to incorporate a specific task for storing in a memory an identification number and switching time of a task to be executed next in a program to be debugged. The novel emulator system includes a first detector for detecting a write cycle of a microcomputer in which the identification number of a task to be executed next is recorded. A second detector detects the start cycle and end cycle of an interrupt. A measurement memory stores the timing of the write cycle and the timing of the start cycle and end cycle of the interrupt.

Abstract: A computer system including a memory model of a memory circuit. The computer system comprises a processor coupled to receive and manipulate the memory model, and a memory including the memory model. The memory model includes: a number of address bits corresponding to a number of address bits of the memory circuit; a number of data bits corresponding to a number of data bits of the memory circuit; and a memory type parameter corresponding to a type of the memory circuit.

Abstract: Systems and methods are disclosed that optimize the combustion process in various reactors, furnaces, and internal combustion engines. Video cameras are used to evaluate the combustion flame grade. Depending on the desired form, standard or special video devices, or beam scanning devices, are used to image the combustion flame and by-products. The video device generates and outputs image signals during various phases of, and at various locations in, the combustion process. Other forms of sensors monitor and generate data signals defining selected parameters of the combustion process, such as air flow, fuel flow, turbulence, exhaust and inlet valve openings, etc. In a preferred form, a neural networks initially processes the image data and characterizes the combustion flame. A fuzzy logic controller and associated fuzzy logic rule base analyzes the image data from the neural network, along with other sensor information.