THE
80286
INSTRUCTION SET
JUMP TASK STATE SEGMENT:
TSS DPL must be
2:
CPL else
#GP
(TSS selector)
TSS DPL must be
2:
TSS selector RPL else
#GP
(TSS selector)
Descriptor AR byte must specify available TSS (bottom bits 00001) else
#GP
(TSS selector)
Task State Segment must be PRESENT else
#NP
(TSS selector)
SWITCH_TASKS with nesting to TS.
IP must be in code segment limit else #GP(O)
Else
GP
(selector)
PROTECTED MODE EXCEPTIONS
For
NEAR
jumps, #GP(O) if the destination offset
is
beyond the limits of the current code segment.
For FAR jumps, #GP, #NP, #SS, and #TS,
as
indicated above. #UD if indirect inter-segment jump
operand
is
a register.
REAL ADDRESS MODE EXCEPTIONS
#UD if indirect inter-segment jump operand
is
a register.
8-58
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