Rev. 1.0, 02/00, page 553 of 1141
φ
Address bus
NMI interrupt
request signal
ATC interrupt
request signal
Start of ATC inter-
rupt processing
(1)
02E0 NOP
02DC NOP
02DE NOP
02E2 NOP
02E4 NOP
02E6 NOP
02E8 NOP
02DC
SP-4
0340
SP-6
SP-8
Vector
Vector
Vector
Vector
02DE
NMI vector
read
02E0
0342
SP-2
02E2
(2) Set one of these to
the trap address
(1) Set to the trap address
*
NMI interrupt
processing
Start of ATC interrupt processing
φ
Address bus
NMI interrupt
request signal
ATC interrupt
request signal
Start of ATC
Interrupt processing
(2)
02DC
02E2
02E4
SP-4
SP-2
0340
Vector
Vector
Vector
02DE
02E0
0342
02E6
02E8
(B)
(A)
NMI interrupt
processing
: :
0340 The starting address of NMI
interrupt
: :
NOP execu-
tion
NOP execu-
tion
NOP
instruc-
tion
pre-fetch
NOP
instruc-
tion
pre-fetch
NOP
instruc-
tion
pre-fetch
NOP
instruc-
tion
pre-fetch
NOP
instruc-
tion
pre-fetch
NOP
instruc-
tion
pre-fetch
NOP
instruc-
tion
pre-fetch
NOP
instruc-
tion
pre-fetch
NOP
instruc-
tion
pre-fetch
NOP
instruc-
tion
pre-fetch
NOP
instruc-
tion
pre-fetch
Figure 25.22 Competing Interrupt (In Case of NMI)