diff --git a/src/mame/drivers/konin.cpp b/src/mame/drivers/konin.cpp
index 8d4758760b0..bf6f271545a 100644
--- a/src/mame/drivers/konin.cpp
+++ b/src/mame/drivers/konin.cpp
@@ -55,7 +55,7 @@ private:
 
 WRITE8_MEMBER(konin_state::picu_b_w)
 {
-	m_picu->b_w(data ^ 7);
+	m_picu->b_w(data);
 }
 
 WRITE_LINE_MEMBER(konin_state::picu_r3_w)
diff --git a/src/mame/drivers/ms6102.cpp b/src/mame/drivers/ms6102.cpp
index 375836ed31d..1fd1f8be5c6 100644
--- a/src/mame/drivers/ms6102.cpp
+++ b/src/mame/drivers/ms6102.cpp
@@ -233,8 +233,7 @@ WRITE8_MEMBER(ms6102_state::kbd_uart_clock_w)
 
 WRITE8_MEMBER(ms6102_state::pic_w)
 {
-	m_pic->b_w((data & 7) ^ 7);
-	m_pic->sgs_w(BIT(data, 3) ^ 1);
+	m_pic->b_sgs_w(data);
 }
 
 WRITE8_MEMBER(ms6102_state::vdack_w)