Data storage system for transferring last entered information fr

Details Data storage system for transferring last entered information fr Data storage system for transferring last entered information fr

1989-09-18

1991-07-23

Lee, Thomas C.

Boots, shoes, and leggings

3649485, 3649453, 364953, 371 66, G06F 1500, G06F 126, G06F 1216

Patent

active

050349155

ABSTRACT:
A data storage system comprised of a disk drive including a magnetic disk for storing an operating system program, a dynamic RAM memory circuit for temporarily storing the operating system program, a static memory circuit for temporarily storing customer entered data, and a direct memory access controller for periodically transferring the customer entered data from the static memory circuit to the magnetic disk and for transferring the operating system program from the magnetic disk to the dynamic RAM memory circuit in response to execution of a bootstrap or power-up program by the microprocessor. In the case of a power down during entry of customer entered data, the customer entered data is saved in the static memory and is transferred to the magnetic disk during the subsequent power up thereby avoiding the use of possibly corrupted data on the disk drive.

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