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3-22 Software Environment and Extensions

AMD-K5 Processor Technical Reference Manual 18524C/0—Nov1996

Figure 3-7. Task State Segment (TSS)

Interrupt Redirection Bitmap (IRB)

(eight 32-bit locations)

I/O Permission Bitmap (IOPB)

(up to 8 Kbyte)

Operating System

Data Structure

Base Address of IOPB

LDT Selector

0000h

EDI

ESI

EBP

ESP

EBX

EDX

ECX

EAX

CR3

EFLAGS

EIP

0000h

SS2

SS1

SS0

Link (Prior TSS Selector)

ESP0

ESP1

ESP2

TSS Limit

from TR

64h

0000h

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