摘要:
Data transfers between remote data sets, data terminals and a main host computer are controlled by a peripheral-controller designated as a Line Support Processor (LSP). The LSP manages a plurality of line adapters, each of which handles a separate data comm line. The LSP includes internal processor means and interface circuit means to effectuate data transfer operations using a variety of protocols and systems both for bit-oriented and byte-oriented data transfers.
摘要:
An I/O subsystem, controlled by a microprocessor, includes a plurality of line adapters, each of which provides data-comm lines to remote terminal units. Each line adapter has a USART control unit and a timer unit having internal registers which can be written-into or read-out from by said microprocessor which uses means to select a particular line adapter to access a particular register in the USART unit or the timer unit.
摘要:
A system for providing edge connection to printed-circuit boards 40 and the like has very low insertion force and almost no contact wear, so avoiding the disadvantages of conventional edge connection systems, by employing a connector comprising two mutually pivotable arms 10 and 12 or 72 and 74 having protrusions 14 and 16 or 76 and 78 at their distal ends which are separable in response to the board being introduced between the protrusions 14 and 16 or 76 and 78 to separate spring contact sections 32 34 far enough to allow insertion of the board 40 without rubbing thereagainst, the protrusions 14 and 16 or 76 and 78 falling into a void 48 94 at the end of insertion to allow the spring contact sections 32 34 to impinge upon pads 44 96 on the board 40 with the coming back together of the arms 10 and 12 or 72 and 74, the system working in reverse for the withdrawal of a board 40.
摘要:
In a system where a plurality of memory boards, which can be of different sizes, are connected to a common address buss and data buss, it is disclosed that a binary adder adds the 2's complement of the contents of base address register with significant bits obtained from the address buss. A series of logic gates are connected to the output of the binary adder and a board size mask register. The logic gates perform a logical AND operation on the binary adder output and the output of board size mask register. The outputs from the logic gates in turn are connected to a multiple input NOR gate. When all the inputs are logical "zero", a board enable command is generated which will activate a memory board transceiver, which will then enable the specified memory board to receive or transmit data over the data buss.
摘要:
Base connection modules are used to house slide-in cards which form a Network Support Processor which executes data transfer operations for up to four main host computers. One Network Support Processor can control up to four Line Support Processors, each one of which manages up to 16 Line Adapters connected, via data communication lines, to remote terminals. The Line Support Processor, via its Line Adapters, handles a wide variety of communication line disciplines but provides a common discipline to its Network Support Processor and the host computer.
摘要:
A mechanism for a data processor that is adapted to receive strings of object code, form them into higher level tasks and to determine sequences of such tasks which are logically independent so that they may be concurrently executed by a plurality of processing elements.
摘要:
An interrupt network whereby, upon completion of a data transfer cycle between a host computer and peripheral-controller or completion of a data transfer cycle between a peripheral terminal and peripheral-controller, the peripheral-controller is placed in an interrupt mode (background mode) and institutes an interrupt service routine. The normal mode data in the peripheral-controller is stored for re-use upon return to normal mode.
摘要:
The disclosure is of a lead-free glass composition including SiO 2 , B 2 O 3 , ZnO, Al 2 O 3 , Na 2 O, K 2 O, CaO, and Li 2 O. The glass is used as a cement frit and as an insulating layer in gas-filled display panels including an electrode which is insulated from the gas therein.
摘要:
A composition for a conductor ink used in a screening process and including a nickel powder, a lead-free glass binder and a vehicle suitable for firing at a temperature below about 590°C. The conductor composition is designed for use in gas plasma display panels.