diff --git a/src/emu/cpu/i386/i386dasm.c b/src/emu/cpu/i386/i386dasm.c
index 9055e54d22c..82423552ac3 100644
--- a/src/emu/cpu/i386/i386dasm.c
+++ b/src/emu/cpu/i386/i386dasm.c
@@ -230,8 +230,8 @@ static const I386_OPCODE i386_opcode_table1[256] =
 	{"imul",            MODRM,          PARAM_REG,          PARAM_RM,           PARAM_IMM       },
 	{"push",            0,              PARAM_I8,           0,                  0               },
 	{"imul",            MODRM,          PARAM_REG,          PARAM_RM,           PARAM_I8        },
-	{"insb",            0,              PARAM_PREIMP,       0,                  0               },
-	{"insw\0insd\0insd",VAR_NAME,       PARAM_PREIMP,       0,                  0               },
+	{"insb",            0,              0,                  0,                  0               },
+	{"insw\0insd\0insd",VAR_NAME,       0,                  0,                  0               },
 	{"outsb",           0,              PARAM_PREIMP,       0,                  0               },
 	{"outsw\0outsd\0outsd",VAR_NAME,    PARAM_PREIMP,       0,                  0               },
 	// 0x70
@@ -296,12 +296,12 @@ static const I386_OPCODE i386_opcode_table1[256] =
 	{"cmpsw\0cmpsd\0cmpsq",VAR_NAME,    PARAM_PREIMP,       0,                  0               },
 	{"test",            0,              PARAM_AL,           PARAM_UI8,          0               },
 	{"test",            0,              PARAM_EAX,          PARAM_IMM,          0               },
-	{"stosb",           0,              PARAM_PREIMP,       0,                  0               },
-	{"stosw\0stosd\0stosq",VAR_NAME,    PARAM_PREIMP,       0,                  0               },
+	{"stosb",           0,              0,                  0,                  0               },
+	{"stosw\0stosd\0stosq",VAR_NAME,    0,                  0,                  0               },
 	{"lodsb",           0,              PARAM_PREIMP,       0,                  0               },
 	{"lodsw\0lodsd\0lodsq",VAR_NAME,    PARAM_PREIMP,       0,                  0               },
-	{"scasb",           0,              PARAM_PREIMP,       0,                  0               },
-	{"scasw\0scasd\0scasq",VAR_NAME,    PARAM_PREIMP,       0,                  0               },
+	{"scasb",           0,              0,                  0,                  0               },
+	{"scasw\0scasd\0scasq",VAR_NAME,    0,                  0,                  0               },
 	// 0xb0
 	{"mov",             0,              PARAM_AL,           PARAM_UI8,          0               },
 	{"mov",             0,              PARAM_CL,           PARAM_UI8,          0               },