Fujitsu CM71-00101-5E Manuale Utente
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CHAPTER 4 RESET AND "EIT" PROCESSING
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Priority of Multiple Processes
When the acceptance of an "EIT" source results in the masking of other sources, the priority of execution of
simultaneously occurring "EIT" handlers is as shown in Table 4.6-2.
*: When "INTE" instructions are run stepwise, only the step trace "EIT" is generated.
Sources related to the "INTE" instruction will be ignored.
Table 4.6-2 Priority of Execution of "EIT" Handlers
Priority
Source
Masking of other sources
1
Reset
Other sources discarded
2
Undefined instruction exception
Other sources disabled
3
Step trace trap
ILM = 4 *
4
INTE instruction
ILM = 4 *
5
NMI
ILM = 15
6
INT instruction
I flag = 0
7
User interrupt
ILM = level of source accepted
8
Coprocessor not found trap
Coprocessor error trap
None