scb_set
void scb_set(u_long, void (*)(void *, u_long), void *);
scb_set(0x900 + SCB_IDXTOVEC(ih), dec_1000_iointr, NULL);
scb_set(0x900 + SCB_IDXTOVEC(ih), dec_1000a_iointr, NULL);
scb_set(0x900 + SCB_IDXTOVEC(ih), dec_550_iointr, NULL);
scb_set(0x900 + SCB_IDXTOVEC(ih), dec_6600_iointr, NULL);
scb_set(0x900 + SCB_IDXTOVEC(ih), eb164_iointr, NULL);
scb_set(0x900 + SCB_IDXTOVEC(ih), eb64plus_iointr, NULL);
scb_set(0x900 + SCB_IDXTOVEC(ih), kn20aa_iointr, NULL);
scb_set(MCPCIA_VEC_PCI + SCB_IDXTOVEC(irq),
scb_set(0x800 + SCB_IDXTOVEC(irq), sio_iointr, NULL);
scb_set(0x800, iointr, NULL);