diff --git a/src/mess/machine/cuda.c b/src/mess/machine/cuda.c
index 71d7db38065..ece5a2e3d31 100644
--- a/src/mess/machine/cuda.c
+++ b/src/mess/machine/cuda.c
@@ -155,6 +155,8 @@ void cuda_device::send_port(address_space &space, UINT8 offset, UINT8 data)
 					printf("CU-> VIA_DATA: %d (PC=%x)\n", (data>>5)&1, m_maincpu->pc());
 					#endif
 					via_data = (data>>5) & 1;
+					via6522_device *via1 = machine().device<via6522_device>("via6522_0");
+					via1->write_cb2(via_data);
 				}
 				if (via_clock != ((data>>4)&1))
 				{
diff --git a/src/mess/machine/egret.c b/src/mess/machine/egret.c
index 5062eb128a5..9dcf9659eb6 100644
--- a/src/mess/machine/egret.c
+++ b/src/mess/machine/egret.c
@@ -153,6 +153,8 @@ void egret_device::send_port(address_space &space, UINT8 offset, UINT8 data)
 					printf("EG-> VIA_DATA: %d (PC=%x)\n", (data>>5)&1, m_maincpu->pc());
 					#endif
 					via_data = (data>>5) & 1;
+					via6522_device *via1 = machine().device<via6522_device>("via6522_0");
+					via1->write_cb2(via_data);
 				}
 				if (via_clock != ((data>>4)&1))
 				{