Method of writing a flash memory including dynamically switching

Details Method of writing a flash memory including dynamically switching Method of writing a flash memory including dynamically switching

1997-08-05

1999-12-07

Chan, Eddie P.

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

36518533, 711173, 707205, G06F 1202

Patent

active

060000058

ABSTRACT:
Disclosed is a flash memory writing method associated with a computer system constituted by a main apparatus and an external apparatus detachable from the main apparatus, in which, when information stored in a memory inside the external memory is written in a flash memory inside the main apparatus, it is always directly copied regardless of the capacity of the flash memory. More specifically, the memory contents of the flash memory can be erased in units of blocks. The memory in the external apparatus is also divided into blocks, one of which stores an IPL and a flash memory rewrite program. A selector switches assignment of the address space of a CPU in response to a selector operation select signal. When the external apparatus is connected to the main apparatus including the CPU, the address space for starting the IPL is assigned to the block of the memory inside the external apparatus which stores the IPL. After the IPL starts, the flash memory rewrite program takes control. While the address space is switched by the selector, copying of data from one block of the memory inside the external apparatus to one block of the flash memory is repeatedly executed a predetermined number of times.

REFERENCES:
patent: 5634079 (1997-05-01), Buxton

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