Oki Dr.63514, User Manual, Page: 41 / 101

Chapter 2. Functions
2-20
When a register stack push/pop is performed, if the emulator detects a stack pointer overflow
or underflow, then it will output a register stack overflow break request.
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Reference
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The stack size appears in the user's manual for the target microcontroller.
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2.3.2.3 Forced Breaks
Forced breaks are breaks that do not depend on parameters or specific conditions. They force
immediate termination of real-time emulation.
(1) N area access break
An attempt to read an instruction or ROM table data from a code memory address not physically present
produces a break request of this type.
0FFFFH
1000H
0FDFH
0000H
N area
Code
memory
area
Code memory
(2000H)
(1FDFH)
Test data area
4K words
(8K words)
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Note 1
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The former is especially problematical because the break occurs after the microcontroller
attempts to execute the indeterminate data from the invalid address.
Real-time emulation immediately terminates.
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Note 2
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The emulator considers the microcontroller's test data area part of the N area.
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Note 3
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