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Patent Searching and Data


Title:
PERSONAL COMPUTER
Document Type and Number:
Japanese Patent JPH04323762
Kind Code:
A
Abstract:

PURPOSE: To prevent the hang-up of a system even though an arithmetic coprocessor undergoes an access through a CPU before the arithmetic coprocessor is loaded.

CONSTITUTION: A personal computer consists of a CPU 10, the arithmetic coprocessors 20 and 30, a detection circuit 40 which detects whether both processors 20 and 50 are loaded or not, a controller 50 where the contents detected by the circuit 40 are registered, and a logic circuit 60 to which the pseudo ready signal outputted from the controller 50 and the ready signal outputted when the coprocessors 20 and 50 are loaded. When the CPU 10 has accesses to both coprocessors 20 and 50, the ready signal. is informed to the CPU 10 regardless of a fact whether the coprocessors 20 and 50 are loaded or not. Thus the system down is never caused.


Inventors:
Nagamachi, Kazuo
Application Number:
JP1991000094334
Publication Date:
November 12, 1992
Filing Date:
April 24, 1991
Export Citation:
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Assignee:
KYOCERA CORP
International Classes:
G06F15/16; G06F15/177; (IPC1-7): G06F15/16



 
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