Fuji Photo Film Company, Limited

Toagosei Chemical Industry, Co., Ltd.

Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Denki K.k.

Teruo Nakagawa

Tsutomu Okita

Takahisa Ogasawara

Hiroshi Hashimoto

Nobuo Tsuji

Hidemaro Tatemichi

Akiyoshi Hashimoto

Hiroyuki Kato

Kyoichi Naruo

Yoshito Mukaida

Kiyokazu Mizutani

Kiyoshi Murase

Noboru Hisanaga

Yorimasa Kobayashi

Takahisa Ogasawara, Deceased

A sequence operation processor and a sequence operation processing method for processing sequence operations at high speed using a multi-port RAM. The sequence operation processor reads data from the multi-port RAM and performs operations as instructed. An operation result which is to be written into RAM is stored in a data register and in a desired address of the multi-port RAM. If the next sequence operation requires that a different address in the multi-port RAM be read, the sequence operation processor writes the operation result to the previously desired address and simultaneously reads the data corresponding to the designated address of the next sequence operation. If, on the other hand, an address where the sequence operation result is to be written is identical to the address from which data used for the next sequence operation is to be read, the sequence operation processor writes the operation result to the multi-port RAM, and reads the data required for the next sequence operation from the data register.

Sequence operation processor employing multi-port RAMs for

A high-speed data processor capable of processing a special operation instruction such as a sequence operation instruction which is different from a normal execution instruction at high speeds. The high-speed data processor is capable of simultaneously reading and executing a special operation instruction which is a sequence operation instruction, even if an instruction prefetchable CPU is used, so that its data processing speed can be improved. Further, the data processor is also capable of causing the CPU to rapidly return from exceptional processing such as interrupt processing when the special operation is being executed, without making the operation result incorrect nor requiring any large instruction memory.

System for rapid return of exceptional processing during sequence

There is provided a magnetic recording material produced by coating on a support a magnetic coating composition which contains as main components a magnetic powder and a binder, the binder comprising an urethane acrylate synthesized using a polyester polyol having a particular structure, and by irradiating the resulting magnetic coat with electron beams to harden it. The polyester polyol contains polyhydric alcohol component, 50 mole % or more of which is a dihydric alcohol selected from the class (A) described below, and/or polybasic acid component, 50 mole % or more of which is a dibasic acid selected from the class (B) described below. The urethane acrylate is synthesized under such a condition that it may have two or more of (meth)acryloyl groups per molecule. Thus, improvements in electromagnetic properties and in durability are attained.

Magnetic recording material

The present invention relates to a magnetic recording medium prepared by the process comprising (1) coating a magnetic coating composition mainly containing ferromagnetic particles and a binder on a support and (2) irradiating the resulting support with electron beams, wherein the binder contains a compound represented by the following formula, ##STR1## wherein A represents a radical of a hydroxy compound containing at least one isocyanurate ring and at least one (meth)acryloyl group; DI represents a radical of an organic diisocyanate compound; B represents a radical of a polyol having at least two hydroxy groups; C represents a radical of a polybasic acid having at least two carboxy groups; m is a number of 1 to 7; and N is a positive number of 7 or less.

Magnetic recording medium

A magnetic recording medium is described, comprising a support and a magnetic layer disposed thereon, said magnetic layer containing as its binder component a combination of at least one member of each of the following groups of compounds (1) to (3) that has been exposed to electron beams:

An emulsion of a crosslinking type comprises an oligoester-(meth)acrylate having at least two (meth)acryloyl groups in a molecule, a molecular weight of not more than 1000 per one (meth)acryloyl group, and a boiling point at a normal pressure of at least 200.degree. C and a polymer emulsion of an oil-in-water type.

Crosslinking emulsion

A low viscous and solvent-free curable composition comprising a polyester type oligo(meth)acrylate having a plurality of (meth)acryloyl groups, and a polyol poly(meth)acrylate.

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Aichi, Japan

Teruo Nakagawa