Hitachi, Ltd.

Kunihiko Ohnuma

Hajime Yasuda

Hideo Maejima

Kazuyoshi Asada

Masayuki Tamasaku

Atuo Yoshida

Keiji Kitazawa

Computer display

A data processor system is capable of operating in a first mode comprising a computer mode so as to carry out data processing functions and is also capable of operating in a second mode comprising a sequencer mode so as to carry out high speed sequence operations on the basis of programmed sequences. A high speed change between the computer and sequencer modes can freely be effected by executing mode change instructions so that the data processor system performs the duplex functions of a computer and a sequencer.

Data processor system capable of providing both a computer mode and a

An LSI microprocessor comprising an instruction fetch portion and an instruction execute portion which fetches an instruction and executes an instruction independently of each other under a microprogram control, a pipeline control being made while synchronizing the portions, the instruction fetch portion containing therein an error processing circuit, which receives an external memory error signal concerning a main memory and an internal protect error signal and which delivers a reset signal for clearing a microprogram counter and starting an error processing microprogram.

LSI Microprocessor having an error processing circuit

Disclosed is a printed circuit board loaded with electronic circuits, the board having at least two connector plugs for power supply, one is relatively long while the other is relatively short. These connector plugs are connected to each other through an impedance element. During an insertion of the board to a power line, the longer connector plug gets in contact with the power line earlier than the shorter one, while, during the withdrawal of the board from the line, the longer connector plug leaves the line later than the shorter one.

Printed circuit board capable of being inserted and withdrawn on on-line

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Hitachi, Japan

Kunihiko Ohnuma