diff --git a/hw/char/parallel-isa.c b/hw/char/parallel-isa.c
index ab0f879998..a5ce6ee13a 100644
--- a/hw/char/parallel-isa.c
+++ b/hw/char/parallel-isa.c
@@ -41,3 +41,17 @@ void parallel_hds_isa_init(ISABus *bus, int n)
         }
     }
 }
+
+void isa_parallel_set_iobase(ISADevice *parallel, hwaddr iobase)
+{
+    ISAParallelState *s = ISA_PARALLEL(parallel);
+
+    parallel->ioport_id = iobase;
+    s->iobase = iobase;
+    portio_list_set_address(&s->portio_list, s->iobase);
+}
+
+void isa_parallel_set_enabled(ISADevice *parallel, bool enabled)
+{
+    portio_list_set_enabled(&ISA_PARALLEL(parallel)->portio_list, enabled);
+}
diff --git a/include/hw/char/parallel-isa.h b/include/hw/char/parallel-isa.h
index 3b783bd08d..5284b2ffec 100644
--- a/include/hw/char/parallel-isa.h
+++ b/include/hw/char/parallel-isa.h
@@ -29,4 +29,7 @@ struct ISAParallelState {
     PortioList portio_list;
 };
 
+void isa_parallel_set_iobase(ISADevice *parallel, hwaddr iobase);
+void isa_parallel_set_enabled(ISADevice *parallel, bool enabled);
+
 #endif /* HW_PARALLEL_ISA_H */