By: Masud-ul-Hasan
22
Special Function Register Space
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- 128
byte address space, directly addressable as 80 to FF
hex.
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- 16 addresses are bit addressable:
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Set, Clear, AND, OR, MOV (those ending with 0 or 8).
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- This space contains:
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Special purpose CPU registers.
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I/O control registers.
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I/O ports.