May 2024
Intermediate to advanced
889 pages
30h 8m
English
book
The X 86 Microprocessors: Architecture, Programming and Interfacing (8086 to Pentium) 2nd Edition by Pearson
by Lyla B. Das
Content preview from The X 86 Microprocessors: Architecture, Programming and Interfacing (8086 to Pentium) 2nd Edition by Pearson
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THE 8051 MICROCONTROLLER: THE PROGRAMMER’S PERSPECTIVE 19-19
other instructions that directly test the state of this flag and no conditional branching is
associated with this flag.
The Overflow Flag (OV) Bit D2, notated as PSW.2 is the overflow flag. This flag is set
under one of the following conditions:
i) There is an overflow into the MSB (D7) from the bit of lower significance, but no
carry out from the MSB,
ii) There is a carry out from the MSB, but no carry into the MSB.
This flag indicates that the result of a signed number operation is too large, causing
the higher order bit to overflow into the sign bit, thus changing the sign bit.
The Parity ...
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