How do I check whether or not an interrupt request is generated ?

Microcomputer Frequently Asked Questions (FAQs) NO.EB9901701

Answer: You can check the presence or absence of an interrupt request by checking the corresponding interrupt flag. This method, however, cannot be used for some interrupt sources.
For example, in the TLCS-870/C Series of microcontrollers, whether or not an interrupt request is generated can be checked by reading the corresponding interrupt latch (IL). However, no interrupt latch is available for reset or software interrupts.; In TX03 Series the interrupt request status is confirmed by referring the pending register.