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Programmable multiplexer
which can be included in a V-8585MP multiprocessor, increasing the single system throughput 1.7 times. Additional 1 Mbyte increments are available. Similarly, tightly coupling smaller processors, ranging from 0.5--4 Mbyte of main memory, give increases in processing power from 1.5-1.7 times. Internal bus architecture is used, where the bus is a high-speed data path to which all system components are attached. Emitter-coupled logic, and random access memory with 370 ns read and 440 ns write cycle times are incorporated. Peripherals use the Bit Serial Link (BSL) protocol. Disc storage subsystems range from 1-540 Mbyte capacity in three models, with a transfer rate of 1.2 Mbyte/s. Printers have speeds up to 2 000 lines/rain, magnetic tape units have recording densities of up to 6 250 bit/in with up to 1.2 Mbyte/s transfer rate, and card readers operate at 1 000 card/min. The systems accommodate the VRX-MP operating system, which provides multiprocessing and can provide a link between different V-8500M models in a single multiprocessing complex. VRX-MP provides: • concurrent remote diagnostics giving the ability to test and monitor the performance of various types of equipment, including terminals, used with the central computer, •
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multiple remote job entry allowing batch data entry stations at remote locations to be used concurrently by the central system, the Telecommunications Access Method, an element of NCR's Distributed Network Architecture, insulating programmers from most of the procedural details of network management and communications,
• online program development, including the ability to access and change or correct programs while they are in operation. Parallel multitasking is used to improve transaction processing. (NCR Ltd~
206 Marylebone Road, London NWI 6L Y, UK. Tel: 01-723 7070) [] 196
Multiprocessing system
Programmable multiplexer An asynchronous multiplexer using microprocessor control of communications has been announced by Computer Automation, UK. The Naked Mini multiplexer has four or eight channels, and is designed for asynchronous data transfer between Naked Mini 4 systems and local or remote RS 232compatible devices. The multiplexer has 16 programmable rates ranging from 50-19 200 bit/s. Data transfers are interrupt driven, with separate receive and transmit vectors for each channel. Full modem control is included, together with full- and half-duplex transmission, parity bit stancfardiza-
tion, and programmable parity for odd, even, or no parity. Programmable character sizesof 5, 6, 7 or 8 bits, with stop codes of 1,1.5 and 2 bit, are standard. Range detection is from 0 to 1 F hex, with special character detection of two programmable characters for each channel. The multiplexer is a standard half card that will fit any Naked Mini 4 chassis. An interface panel on a separate card mounts on a 19 in RETMA rack to provide standard connectors for device cables. (Computer Automation,
Hertford House, Maple Cross, Rickmansworth, Herts. WD3 2XD, UK. Tel: 092-37 71211 Tx: 922654)
Cluster controller software Remote Terminal Cluster Controller software, which is IBM 3270 compatible, has been designed for Eclipse computer systems running under the Advanced Operating System (AOS) by Data General, USA. AOS RCX70 allows transparent replacement of IBM 3270 equipment and provides a dynamic link to the remote host computer. Local terminal users have access to all data, whether information is stored in the central system or at the local site. If the appropriate data is not stored locally, the system supervises access to the host's applications and database.
Software emulation allows AOS tasks and terminals to appear, to the host computer, as IBM 3271 Cluster Controllers and 3277 terminals. Implementation of distributed applications processing and local standalone processing is allowed. Support is provided for concurrent communications with other Data General compatible communications software packages running in the same system. Emulation runs as a separate process, with the software package concentrating information entered on terminals and supervising communication of data to, and from,
computer communications
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multiple remote job entry allowing batch data entry stations at remote locations to be used concurrently by the central system, the Telecommunications Access Method, an element of NCR's Distributed Network Architecture, insulating programmers from most of the procedural details of network management and communications,
• online program development, including the ability to access and change or correct programs while they are in operation. Parallel multitasking is used to improve transaction processing. (NCR Ltd~
206 Marylebone Road, London NWI 6L Y, UK. Tel: 01-723 7070) [] 196
Multiprocessing system
Programmable multiplexer An asynchronous multiplexer using microprocessor control of communications has been announced by Computer Automation, UK. The Naked Mini multiplexer has four or eight channels, and is designed for asynchronous data transfer between Naked Mini 4 systems and local or remote RS 232compatible devices. The multiplexer has 16 programmable rates ranging from 50-19 200 bit/s. Data transfers are interrupt driven, with separate receive and transmit vectors for each channel. Full modem control is included, together with full- and half-duplex transmission, parity bit stancfardiza-
tion, and programmable parity for odd, even, or no parity. Programmable character sizesof 5, 6, 7 or 8 bits, with stop codes of 1,1.5 and 2 bit, are standard. Range detection is from 0 to 1 F hex, with special character detection of two programmable characters for each channel. The multiplexer is a standard half card that will fit any Naked Mini 4 chassis. An interface panel on a separate card mounts on a 19 in RETMA rack to provide standard connectors for device cables. (Computer Automation,
Hertford House, Maple Cross, Rickmansworth, Herts. WD3 2XD, UK. Tel: 092-37 71211 Tx: 922654)
Cluster controller software Remote Terminal Cluster Controller software, which is IBM 3270 compatible, has been designed for Eclipse computer systems running under the Advanced Operating System (AOS) by Data General, USA. AOS RCX70 allows transparent replacement of IBM 3270 equipment and provides a dynamic link to the remote host computer. Local terminal users have access to all data, whether information is stored in the central system or at the local site. If the appropriate data is not stored locally, the system supervises access to the host's applications and database.
Software emulation allows AOS tasks and terminals to appear, to the host computer, as IBM 3271 Cluster Controllers and 3277 terminals. Implementation of distributed applications processing and local standalone processing is allowed. Support is provided for concurrent communications with other Data General compatible communications software packages running in the same system. Emulation runs as a separate process, with the software package concentrating information entered on terminals and supervising communication of data to, and from,
computer communications