Data processing system for effectively handling exceptions durin

Details Data processing system for effectively handling exceptions durin Data processing system for effectively handling exceptions durin

1989-06-06

1992-03-10

Lee, Thomas C.

Boots, shoes, and leggings

3642628, 3642624, 3642656, 3642613, 364DIG1, G06F 922

Patent

active

050954261

ABSTRACT:
A data processing apparatus includes a control storage, a first storage, a second storage, an address storage, an identifying section, an executing section, a saving section, a holding section, a selecting section, and an exception handler. A first type instruction realized by a microprogram stored in the control storage and a second type instruction realized by an instruction program constituted by first type instructions are identified. When this identification result indicates a second type instruction, the data processing apparatus causes the second type instruction to be executed by first type instructions constituting instruction program for the second type instruction. When an exception occurs during the execution of this instruction program, the data processing apparatus can process the exception by using the address of the second type instruction saved in the saving section. The exception handler can handle an exception occurring during the execution of the instruction program for realizing a second type instruction.

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patent: 3886523 (1975-05-01), Ferguson
patent: 4370709 (1983-01-01), Fosdick
patent: 4399505 (1983-08-01), Druke
patent: 4901235 (1990-02-01), Vora
patent: 4928223 (1990-05-01), Dao
patent: 4975837 (1990-12-01), Woodward

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