diff --git a/Machines/Oric/Oric.cpp b/Machines/Oric/Oric.cpp
index 9ecff5352..accbb8ec0 100644
--- a/Machines/Oric/Oric.cpp
+++ b/Machines/Oric/Oric.cpp
@@ -113,11 +113,11 @@ unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uin
 						if(isReadOperation(operation)) *value = microdisc_.get_register(address);
 						else microdisc_.set_register(address, *value);
 					break;
-					case 0x314:
+					case 0x314: case 0x315: case 0x316: case 0x317:
 						if(isReadOperation(operation)) *value = microdisc_.get_interrupt_request_register();
 						else microdisc_.set_control_register(*value);
 					break;
-					case 0x318:
+					case 0x318: case 0x319: case 0x31a: 0x31b:
 						if(isReadOperation(operation)) *value = microdisc_.get_data_request_register();
 					break;
 				}