Why do commands using Extended addressing require 3 bytes of memory?
Why do commands using Extended addressing require 3 bytes of memory?
Homework Answers
Ans:
If the system only supports 3-Byte addressing, the Extended
Address Register mode is an alternative
method that can be used to access memory beyond the 128Mb limit.
The device provides a volatile
8-bit EAR register that is automatically appended to the normal
3-Byte address and in effect creates a
4-Byte address*1. No commands are needed to enter or exit this
mode. EAR mode operates with the
legacy 3-Byte address command set. Hence commands using extended
addressing requires 3 bytes of memory.
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Why do commands using Extended addressing require 3 bytes of
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