HP Precision Architecture - precision bus highlighted

The HP Precision bus (also called HP-PB and HP-NIO) is the data transfer

bus A bus (contracted from omnibus, with variants multibus, motorbus, autobus, etc.) is a road vehicle that carries significantly more passengers than an average car or van. It is most commonly used in public transport, but is also in use for cha ...

of the proprietary Hewlett Packard architecture

HP 3000 The HP 3000 series is a family of 16-bit and 32-bit minicomputers from Hewlett-Packard. It was designed to be the first minicomputer with full support for time-sharing in the hardware and the operating system, features that had mostly been limite ...

and later many variants of the HP 9000 series of UNIX systems. This bus has a 32-bit data path with an 8

MHz The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose expression in terms of SI base units is s−1, meaning that one he ...

clock A clock or a timepiece is a device used to measure and indicate time. The clock is one of the oldest human inventions, meeting the need to measure intervals of time shorter than the natural units such as the day, the lunar month and t ...

. It supports a maximum transfer rate of 23 MB/s in burst mode. That bus was also used to directly support the Programmable Serial Interface (PSI) cards, which offered multi-protocol support for networking, notably IBM Bisync and similar systems.The 920, 922 and 932 series supported up to three PSI cards, and up to five cards in the 948 and 958 series. Two form factors/sizes of HP-PB expansion cards were sold: single and double. * 32-bit data path width * 32 MB/s maximum data rate * 8 MHz maximum frequency * 5 V signalling voltage * 96-pin (32×3) female pin+socket card connector ''(Is this a

DIN 41612 DIN 41612 was a DIN standard for electrical connectors that are widely used in rack based electrical systems. Standardisation of the connectors is a pre-requisite for open systems, where users expect components from different suppliers to operat ...

connector?)''

External links

HP 3000 manuals

Notes

Computer buses Hewlett-Packard products {{Computer-hardware-stub