摘要:
A computer system of this invention includes a power input terminal which is provided outside a personal computer, and an external fuel cell assembly connected to the power input terminal. Hence, a computer system in which water produced from the fuel cell assembly is prevented from entering the computer can be provided. A personal computer for which an operation mode for deriving the personal computer by a fuel cell assembly is prepared to prevent any trouble due to user's misunderstanding can be provided.
摘要:
A computer system of this invention includes a power input terminal which is provided outside a personal computer, and an external fuel cell assembly connected to the power input terminal. Hence, a computer system in which water produced from the fuel cell assembly is prevented from entering the computer can be provided. A personal computer for which an operation mode for deriving the personal computer by a fuel cell assembly is prepared to prevent any trouble due to user's misunderstanding can be provided.
摘要:
A computer system of this invention includes a power input terminal which is provided outside a personal computer, and an external fuel cell assembly connected to the power input terminal. Hence, a computer system in which water produced from the fuel cell assembly is prevented from entering the computer can be provided. A personal computer for which an operation mode for deriving the personal computer by a fuel cell assembly is prepared to prevent any trouble due to user's misunderstanding can be provided.
摘要:
In this invention, a fuel cell assembly and an air channel for supplying air to the fuel cell assembly are arranged in a display unit of an electronic apparatus. A drain hole for draining water produced by the fuel cell assembly is formed in a side surface of the display unit. When a drain tool is connected to the drain hole and the electronic apparatus is in the OFF state, the operation mode switches to a fuel cell assembly mode for using the fuel cell assembly.
摘要:
In this invention, the bus of a computer body is connected to the bus of an expansion unit through a serial interface so as to implement connection wirings in the form of a serial cable. A PCI-PCI bridge for connecting a primary PCI bus to a secondary PCI bus comprises two physically isolated controllers, i.e., a primary PCI serial transfer controller implemented on the PC body side and a secondary PCI serial transfer controller implemented on the docking station side. The two controllers are connected to each other through serial LVDS lines. Transactions are exchanged between the primary PCI bus and the secondary PCI bus by serial transfer between the primary PCI serial transfer controller and the secondary PCI serial transfer controller.
摘要:
A memory access control system is disclosed. In this system, a CPU, a low speed memory, a high speed memory and direct memory access controller (DMAC) are connected to a system bus. A high speed memory is connected through a local bus to the CPU. A control circuit is connected to the local bus, the system bus and the high speed memory. A bidirectional buffer is connected to the local and system buses. When the CPU accesses the high speed memory, the control circuit addresses the high speed memory and disables the buffer. As a result, data can directly be transferred between the CPU and the high speed memory. When the CPU accesses the low speed memory, the control circuit drives the system bus according to a protocol of the system bus, thereby to address the low speed memory and enables the buffer. As a result, data can be transferred between the CPU and the low speed memory, via a route of the local bus, the buffer and the system bus. When the DMAC accesses the high speed memory, the control circuit addresses the high speed memory and enables the buffer according to the system bus protocol. As a result, data can be transferred between the DMAC and the high speed memory, through a route of the local bus, the buffer, and the system bus. When the DMAC accesses the low speed memory, the control circuit disables the high speed memory and the buffer.
摘要:
A floppy disk drive interface circuit of the invention has a counter/selector for counting the pulse width of a window signal supplied from a voltage frequency oscillator. When a window pulse having a pulse width longer or shorter than a preset pulse width is input, counter/selector supplies a disable signal to AND gate 22. AND gate 22blocks window signal 12 from VFO2 being supplied to FDC 3.
摘要:
A PCI-PCI bridge is composed of two physically different controllers, i.e., a primary PCI serial transfer controller arranged at a PC, and a secondary PCI serial transfer controller arranged at a docking station. In data transfer between these controllers, preliminary transmission of block data having a block ID assigned thereto and a return of ACK having the block ID assigned thereto are performed asynchronously. The transmission party can determine which data item is the last the receiving party has received by employing a block ID assigned to NAK. When NAK is received from the receiving party, re-transmission from a block waiting for NAK is started. In this manner, data required to transmit a bus transaction between buses can be transferred accurately and speedily between two controllers.
摘要:
A PCI-PCI bridge which connects a primary PCI (Peripheral Component Interconnect) bus and a secondary PCI bus comprises two physically different controllers, a primary PCI serial transfer controller located on a PC (Personal Computer) body side and a secondary PCI serial transfer controller located on a docking station side. Both controllers are connected together by serial LVDS (Low Voltage Differential Signal) lines, and data needed to transfer a bus cycle is serially transferred between both controllers. An interrupt signal generated on the docking station side is serially transferred to the primary PCI serial transfer controller from the secondary PCI serial transfer controller via the serial LVDS lines for transferring data in a bus cycle.
摘要:
A gas-tight container such as a glove box maintains a sample under a controlled atmosphere and has a sample chamber formed in a convex portion thereof. The temperature is controlled in the sample chamber by an externally disposed heater. A detector such as a weight detector is disposed in the gas-tight container and has a sample holder for holding a sample under analysis. The detector is movably supported by a movement mechanism so that the sample holder is movable between a first position at which a sample disposed on the sample holder is disposed within the sample chamber and a second position at which a sample disposed on the sample holder is disposed outside the sample chamber, such that the mounting of a sample on the sample holder may be accomplished while the sample holder is disposed outside the sample chamber and a thermal analysis of the sample may be performed while the sample is disposed inside the sample chamber. Gas inlet and outlet ports are provided to form a stream of purge gas to continually replace the atmosphere in the gas-tight chamber and the sample chamber, and the gas produced by the sample during analysis thereof is discharged together with the purge gas through a gas discharge port provided at a tip of the sample chamber.