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CHAPTER 2 MEMORY ARCHITECTURE
2.1.2 Vector Table Area
An area of 1 Kbyte beginning with the address shown in the table base register (TBR) is
used to store "EIT" vector addresses.
■ Overview of Vector Table Areas
An area of 1 Kbyte beginning with the address shown in the table base register (TBR) is used to store "EIT"
vector addresses. Data written to this area includes entry addresses for exception processing, interrupt
processing and trap processing.
The table base register (TBR) can be rewritten to allocate this area to any desired location within word
alignment limitations.
Figure 2.1-3 Relation between Table Base Register (TBR) and Vector Table Addresses
0000 0000H
FFFF FFFFH
TBR
1 Kbyte
Number
Offset
from TBR
EIT source
FF
H
FEH
FDH
FCH
00H
000H
004H
008H
00CH
3FCH
Entry address for INT instruction
Entry address for INT instruction
Entry address for INT instruction
Entry address for INT instruction
Entry address for reset processing
Memory space
Vector
table
area