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MOTOROLA M68040 USER'S MANUAL 3- 35
BRANCH TO "SUPERVISOR 
VOILATION" CODE
BRANCH TO "WRITE 
VIOLATION" CODE
BRANCH TO "WRITE 
VIOLATION" CODE
PTEST (An)
BRANCH TO "PAGE FAULT" OR 
"INVALID DESCRIPTOR" CODE
BRANCH TO "BUS ERROR 
DURING TABLE SEARCH" CODE
NOT MMU
R = 0
B = 0
B = 1R = 1
T = 1
T = 0
OTHERWISE MATCH TTR0*
OTHERWISE OTHERWISE
MATCH TTR1*
OTHERWISE
TTR1*[W] = 1 AND (WRITE OR 
RMW ACCESS INDICATED IN 
STACK FRAME)
TTR0*[W] = 1 AND (WRITE OR 
RMW ACCESS INDICATED IN 
STACK FRAME)
WRITE OR RMW ACCESS 
INDICATED IN STACK 
FRAME
W = 1
OTHERWISE
W = 0
OTHERWISE
S = 1 AND (USER ACCESS 
INDICATED IN STACK FRAME)
NOT MMU
* Refers to either instruction or data transparent translation register.
Figure 3-23. MMU Status Interpretation
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