
Rev. 2.0, 09/02, page 55 of 732
5.1.3
Exception Processing Vector Table
Before exception processing begins running, the exception processing vector table must be set in
memory. The exception processing vector table stores the start addresses of exception service
routines. (The reset exception processing table holds the initial values of PC and SP.)
All exception sources are given different vector numbers and vector table address offsets. The
vector table addresses are calculated from these vector numbers and vector table address offsets.
During exception processing, the start addresses of the exception service routines are fetched from
the exception processing vector table that is indicated by this vector table address.
Table 5.3 shows the vector numbers and vector table address offsets. Table 5.4 shows how vector
table addresses are calculated.
Table 5.3 Exception Processing Vector Table
Exception Sources
Vector Numbers
Vector Table Address Offset
Power-on reset
PC
0
H'00000000 to H'00000003
SP
1
H'00000004 to H'00000007
Manual reset
PC
2
H'00000008 to H'0000000B
SP
3
H'0000000C to H'0000000F
General illegal instruction
4
H'00000010 to H'00000013
(Reserved by system)
5
H'00000014 to H'00000017
Slot illegal instruction
6
H'00000018 to H'0000001B
(Reserved by system)
7
H'0000001C to H'0000001F
8
H'00000020 to H'00000023
CPU address error or AUD address error
*
1
9
H'00000024 to H'00000027
DMAC/DTC address error
10
H'00000028 to H'0000002B
Interrupts
NMI
11
H'0000002C to H'0000002F
User break
12
H'00000030 to H'00000033
(Reserved by system)
13
H'00000034 to H'00000037
H-UDI
14
H'00000038 to H'0000003B
(Reserved by system)
15
:
31
H'0000003C to H'0000003F
:
H'0000007C to H'0000007F
Trap instruction (user vector)
32
:
63
H'00000080 to H'00000083
:
H'000000FC to H'000000FF