Abstract: A host adapter, having at least two connectors which both belong to a single digital computer bus, includes a first terminator that is coupled to a first portion of the digital computer bus, and a second terminator that is coupled to a second, separate portion of the bus. Upon being enabled by a control signal, these terminators respectively terminate the first and second portions of the bus. The host adapter also includes termination control logic coupled to the first and second terminators, and to connectors for the bus. The termination control logic receives connection signals from the connectors which indicate connection or non-connection of a device to the first portion, or to the combined first and second portions of the bus. The termination control logic processes these connection sensing signals and transmits two independent control signals which appropriately enable or disable the first and second terminators.

Abstract: An enhanced-performance floppy diskette subsystem, which operates many times faster than a conventional floppy diskette subsystem, includes both an enhanced-performance floppy diskette drive and floppy diskette drive controller. The diskette drive rotates a floppy diskette two or more times faster than that of a conventional floppy diskette drive, and includes two separate and independent read/write ("R/W") channels. To provide enhanced-performance, the floppy diskette drive controller includes a DRAM cache that maintains an image of the data recorded on a floppy diskette present in the floppy diskette drive. Two separate and independent floppy disk drive controller channels respectively interface between the cache memory and the R/W channels included in the enhanced-performance floppy diskette drive.

Abstract: A PC Card controller, adapted for use in a laptop or notebook computer, generates a fake PC Card-insertion interrupt when a CPU, included in the computer, resumes normal operation after being in a lower power, Suspend operating mode. The PC Card controller includes a host-computer bus-interface adapted for exchanging interrupt signals with a bus included in the host computer. The PC Card controller also includes a PC Card interface-circuit for exchanging digital signals with a PC Card inserted into a PC Card socket included in the host computer. Insertion of a PC Card into the PC Card socket, while the CPU is in its normal operating mode, causes the PC Card interface-circuit to generate an interrupt signal for transmission to the CPU. The PC Card controller also includes a suspend/resume pin that receives a suspend/resume signal generated within the host computer.