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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4-12
THE
x86 MICROPROCESSORS
4.2.2.2
|
Intersegment or Far Call
Direct Far Call A far call is an intersegment call, which means that the destination
address is in a different code segment. This will be a 5-byte instruction, the first byte
being the opcode, the second and third bytes being the new value of IP and the fourth
and fifth being the new values of CS. This is not a relative call. When the procedure
is called, the IP and CS values are replaced by the corresponding values in the call
instruction as shown in the Fig. 4.4.
Indirect Far Call For an indirect call, the destination address is not in the instruction
– rather, it is in a register ...
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