How can I handle ISA_IRQ0, ISA_IRQ1, ISA_IRQ2, ISA_IRQ3 on M5475EVBE board ?
About ISA_IRQ management, the manual “Fire_Engine_HW_Spec.pdf” at page 33 reports: “offboard IRQx comes to the CPLD and generates IRQ6back at the processor”.
The problem is that the line IRQ6# to the MCF5475 (monitored on J12 pin 44) remains always high even if I press the S3 button (INTERRUPT BUTTON) that is equivalent to an ISA_IRQ0 request.
- The CPLD firmware of M5475EVBE board support ISA_IRQx management ?
- Is there a software procedure to enable interrupt multiplexing (ISA_IRQx towards IRQ6#) into CPLD ?
Thanks in advance
Alberto Mancini
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