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Exception Processing
8-16
M68060 USER’S MANUAL
MOTOROLA
instruction causes the MC68060 to assert the RSTO signal, allowing other devices within
the system to be reset.
Figure 8-5. Reset Exception Processing Flowchart
EXIT
FETCH VECTOR #0
FETCH VECTOR #1
FETCH FIRST
INSTRUCTION
(DOUBLE BUS FAULT)
SP
VECTOR #0
VECTOR #1
S-BIT OF SR
T-BIT OF SR
I2–I0 BITS OF SR
VBR
CACR
DTTn[E-BIT]
ITTn[E-BIT]
TCR
BUSCR
PCR
FP DATA REGS.
FP CONTROL REGS.
=
=
=
=
=
=
=
=
=
=
=
=
1
0
$7
$0
$0
0
0
$0
$0
$0
NAN
$0
EXIT
(DOUBLE BUS FAULT)
(DOUBLE BUS FAULT)
ENTRY
OTHERWISE
BEGIN INSTRUCTION
EXECUTION
OTHERWISE
BUS ERROR
BUS ERROR
BUS ERROR OR
ADDRESS ERROR
HALTED STATE
(PST4–PST0 = $1C)
OTHERWISE
PC
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