diff --git a/src/devices/cpu/cops1/mm5799op.cpp b/src/devices/cpu/cops1/mm5799op.cpp
index 4e293ff3c3f..84f0c6ef766 100644
--- a/src/devices/cpu/cops1/mm5799op.cpp
+++ b/src/devices/cpu/cops1/mm5799op.cpp
@@ -228,7 +228,7 @@ void mm5799_device::op_ret()
 
 void mm5799_device::op_rets()
 {
-	// RET: return from subroutine, skip next
+	// RETS: return from subroutine, skip next
 	op_ret();
 	m_skip = true;
 }
diff --git a/src/mame/rm/rm380z_v.cpp b/src/mame/rm/rm380z_v.cpp
index 2dfa15c0682..152b5138896 100644
--- a/src/mame/rm/rm380z_v.cpp
+++ b/src/mame/rm/rm380z_v.cpp
@@ -446,9 +446,10 @@ void rm480z_state::update_screen(bitmap_ind16 &bitmap) const
 				if (ra < 10)
 				{
 					const uint8_t chr = m_vram.get_char(y, x);
-					gfx = m_chargen[(chr << 4) | ra ];
+					gfx = m_chargen[(chr << 4) | ra];
 				}
-				/* Display a scanline of a character */
+
+				// Display a scanline of a character
 				*p++ = BIT(gfx, 7);
 				*p++ = BIT(gfx, 6);
 				*p++ = BIT(gfx, 5);
@@ -459,6 +460,5 @@ void rm480z_state::update_screen(bitmap_ind16 &bitmap) const
 				*p++ = BIT(gfx, 0);
 			}
 		}
-		ma += 64;
 	}
 }