forked from Imagelibrary/rtems
the special handling of a 'FPGA interrupt' [this FPGA is *not* present on the uC5282 module but is externally connected to IRQ1 on Eric Norum's particular 'motherboard'] is only activated when connecting to the special vectors > 192. The change allows us ordinary users [:-)] to use IRQ1 normally, simply by connecting an ISR to vector 64+1... Also, BSP_enable_irq_at_pic(), BSP_disable_irq_at_pic(), BSP_irq_is_enabled_at_pic() were introduced (compat. with some PPC BSPs).