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US 4,791,564 AGranted
Random access memory file apparatus for personal computer with external memory file
AssigneeSharp Kabushiki Kaisha
InventorYasuyuki Takai
Life of this patent
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Abstract
A memory file system suitable for a computer such as a personal computer comprises a central processing unit (CPU) for controlling the operation of the computer, an external memory such as a sequential access type floppy disc for storing data, a printer for printing out the data with the help of the CPU, and a random access memory (RAM) for storing code data to be forwarded into the the external memory. The RAM stores the data together with a directory.
Claims4
A memory file system for a computer comprising:
- central processing unit (CPU) means for controlling the operation of the computer;
- external sequential access type memory means for storing data in a plurality of sequentially arrayed files, each file including a directory portion and a data portion, each said directory portion storing information identifying the data in the corresponding data portion;
- output means, controlled by said CPU means, for outputting said data;
- first random access memory (RAM) means for storing program instructions to be executed by said computer;
- second random access memory (RAM) means for storing all of the data in said plurality of files of said external memory means, said second RAM means including a directory section for storing respective addresses of the data stored in each file of said external memory means, and a buffer section for storing particular data to be outputted by said output means;
- and
- means for accessing the data stored in said sequential access type memory means by accessing said second RAM means.
4 more elements
Dependencies are inferred from the claim text.