What is bank switching in electronics?
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is a technique for overcoming the limitations of computers that can only address
a limited amount of immediate access storage. Several `banks` of storage are
provided each one occupying the same place in the computer`s memory map.
Only one bank may be active at any one time and the desired one is selected by
software. This technique is frequently used to provide a range of ROMbased
software within a microcoinputer such as a wordprocessor a spreadsheet and
a database any one of which may be used at a time. Software provided in this
way is sometimes known as sideways ROM.