mf_aer
MFP->mf_aer = MFP->mf_ddr = 0;
MFP2->mf_aer = 0x80;
MFP2->mf_aer |= 0x80; /* SCSI IRQ goes HIGH!!!!! */
MFP2->mf_aer |= 0x10; /* fdc int low->high */
MFP->mf_aer |= (IO_ISA1|IO_ISA2); /* ISA interrupts: LOW->HIGH */
MFP2->mf_aer &= ~(0x27); /* PCI interrupts: HIGH -> LOW */