Only use DF for addresses generated via indirection.

1 files changed, 2 insertions, 1 deletions

diff --git a/isa/checker.cpp b/isa/checker.cpp
index 770d9d6..6eaa15f 100644
--- a/isa/checker.cpp
+++ b/isa/checker.cpp
@@ -21,7 +21,8 @@ void checker::execute() {
             addr = (addr + 1) & 07777;
             mem.store(*inst.init_address, addr);
         }
-        inst.final_address = addr;
+        auto df = ctlregs[DATA_INSTRUCTION_FIELD_BUFFER] >> 3;
+        inst.final_address = (df << 12) | addr;
     } else {
         assert(!inst.need_autoinc_store);
     }