To patch either FRTS.SV or BRTS.SV so that they will work correctly with all 12K system handlers, do the following: .DA 16-JAN-79 .DA 16-JAN-79 (reflect date of the patch) .LO FRTS.SV/I$ .LO BRTS.SV/I$ ('$' is ALTMODE or ESCAPE) *FPAT$ *BPAT$ .SA SYS FRTS .SA SYS BRTS (doing it twice keeps the .SA SYS FRTS .SA SYS BRTS program in the same place) A new version of BLOAD.SV (dated 16-JAN-79) is also required. These patches were part of the 'OS/8 Device Extension Kit' upgrade in 1979.