HP Precision Bus
Encyclopedia
The HP Precision bus is the data transfer bus of the proprietary Hewlett Packard architecture HP 3000
. This bus gives a 32 bits data path with an 8 MHz clock
. It supports a maximum transfer rate of 23 MB
/s in burst mode
. That bus can handle up to three, psi standard, expansion cards in the 920, 922 and 932 series 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
HP 3000
The HP 3000 series is a family of minicomputers released by Hewlett-Packard in 1973. It was designed to be the first minicomputer delivered with a full featured operating system with time-sharing. The first models were withdrawn from the market until speed improvements could be made. It ultimately...
. This bus gives a 32 bits data path with an 8 MHz clock
Clock signal
In electronics and especially synchronous digital circuits, a clock signal is a particular type of signal that oscillates between a high and a low state and is utilized like a metronome to coordinate actions of circuits...
. It supports a maximum transfer rate of 23 MB
Byte
The byte is a unit of digital information in computing and telecommunications that most commonly consists of eight bits. Historically, a byte was the number of bits used to encode a single character of text in a computer and for this reason it is the basic addressable element in many computer...
/s in burst mode
Burst mode (computing)
Burst mode is a generic computing term referring to any situation in which a device is transmitting data repeatedly without waiting for input from another device or waiting for an internal process to terminate before continuing the transfer of data.In the case of DMA, the DMA controller and the...
. That bus can handle up to three, psi standard, expansion cards in the 920, 922 and 932 series 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