MB86290A Datasheet, PDF (35/184 Pages) Fujitsu Component Limited. – Graphics Controller Hardware Specifications

3.4 Interrupt Request
MB86290A issues interrupt requests to the host CPU. The following events
issue interrupt requests. An interrupt request caused by each of these
events is enabled/disabled independently by IMR (Interrupt Mask Register).
♦ External synchronization error
♦ Vertical synchronization timing detect
♦ Field synchronization timing detect
♦ Command error
♦ Command complete
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