參數(shù)資料
型號: V30MZ
英文描述: V30MZ(TM) Hardware (Preliminary) | User's Manual[01/2002]
中文描述: V30MZ(TM)硬件(初步)|用戶手冊[01/2002]
文件頁數(shù): 63/89頁
文件大?。?/td> 418K
代理商: V30MZ
CHAPTER 5 INTERRUPT FUNCTIONS
63
Example 2.
When an interrupt request is generated in execution of STMB instruction
STMB bus cycle
Interrupt servicing
INT input or NMI input
If at the start of an interrupt service routine started in this way the CW register operating as a counter for the block
data is saved to the stack and the saved CW register is restored at the end of the interrupt service routine and then
the original routine is returned to by an RETI instruction, the suspended block processing can be restarted.
At this time, if a prefix is placed before the block processing instruction, the return address is modified (–1 address
for one kind of prefix) and saved so that up to 3 kinds of prefix are stored and can be returned to the address at
which the prefix is placed when returning from the interrupt service routine.
In order to use these functions effectively, set the sum of prefixes placed before a block processing instruction to
three or less.
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