Motorola M68000 User Manual Page 340

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Exception Processing Reference
MOTOROLA
MC68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
B-3
B.2 EXCEPTION STACK FRAMES
Figures B-1 through B-15 illustrate all exception stack frames for the M68000 family..
Figure B-1. MC68000 Group 1 and 2 Exception Stack Frame
Figure B-2. MC68000 Bus or Address Error Exception Stack Frame
Figure B-3. Four-Word Stack Frame, Format $0
Figure B-4. Throwaway Four-Word Stack Frame, Format $1
STATUS REGISTER
SP
15 0
PROGRAM COUNTER HIGH
7 0
PROGRAM COUNTER LOW
70
ODD BYTE EVEN BYTE
HIGHER
ADDRESS
LOWER
ADDRESS
0
15
I/N
FUNCTION CODE
HIGH
LOW
2345
R/W
STATUS REGISTER
INSTRUCTION REGISTER
LOW
HIGH
ACCESS ADDRESS
PROGRAM COUNTER
R/W (READ/WRITE): WRITE = 0, READ = 1. I/N
(INSTRUCTION/NOT): INSTRUCTION = 0, NOT = 1.
STATUS REGISTER
PROGRAM COUNTER
0 0 0 0 VECTOR OFFSET
015
SP
+$02
+$06
STATUS REGISTER
PROGRAM COUNTER
0 0 0 1 VECTOR OFFSET
015
SP
+$02
+$06
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