diff --git a/src/emu/i8088.rs b/src/emu/i8088.rs
index d533972..f5308b9 100644
--- a/src/emu/i8088.rs
+++ b/src/emu/i8088.rs
@@ -114,7 +114,7 @@ macro_rules! step {
   };
 
   (@modrm16 $cookie:tt, $cpu:expr, $bus:expr, $prefix:tt,
-   ($modrm_val:ident, { $($val:literal => $($args:ident = $argrhs:tt),*),*$(,)? }, $modrm8:tt)) => { {
+   ($modrm_val:ident, { $($val:literal => $($args:ident = $argrhs:tt),* / $mode:ident $cycles:literal),*$(,)? }, $modrm8:tt)) => { {
      let modrm_val = $modrm_val & !0x38;
      match modrm_val {
        $( $val => step!(@push $cookie, ($($args = $argrhs)* ) ) ),*,
@@ -123,7 +123,7 @@ macro_rules! step {
    } };
 
   (@modrm8 $cookie:tt, $cpu:expr, $bus:expr, $prefix:tt,
-   ($modrm_val:ident, $modrm16:tt, { $($val:literal => $($args:ident = $argrhs:tt),*),*$(,)? } )) => { {
+   ($modrm_val:ident, $modrm16:tt, { $($val:literal => $($args:ident = $argrhs:tt),* / $mode:ident $cycles:literal),*$(,)? } )) => { {
      let modrm_val = $modrm_val & !0x38;
      match modrm_val {
        $( $val => step!(@push $cookie, ($($args = $argrhs)* ) ) ),*,
@@ -295,24 +295,24 @@ impl i8088 {
           0xE8 => call[reg=ip, regval=ss, reg=sp, mem, rel16] / 23,
         },
         modrm16: {
-          0xC0 => reg=a,
-          0xC1 => reg=c,
-          0xC2 => reg=d,
-          0xC3 => reg=b,
-          0xC4 => reg=sp,
-          0xC5 => reg=bp,
-          0xC6 => reg=si,
-          0xC7 => reg=di,
+          0xC0 => reg=a / R 0,
+          0xC1 => reg=c / R 0,
+          0xC2 => reg=d / R 0,
+          0xC3 => reg=b / R 0,
+          0xC4 => reg=sp / R 0,
+          0xC5 => reg=bp / R 0,
+          0xC6 => reg=si / R 0,
+          0xC7 => reg=di / R 0,
         },
         modrm8: {
-          0xC0 => reglo=a,
-          0xC1 => reglo=c,
-          0xC2 => reglo=d,
-          0xC3 => reglo=b,
-          0xC4 => reghi=a,
-          0xC5 => reghi=c,
-          0xC6 => reghi=d,
-          0xC7 => reghi=b,
+          0xC0 => reglo=a / R 0,
+          0xC1 => reglo=c / R 0,
+          0xC2 => reglo=d / R 0,
+          0xC3 => reglo=b / R 0,
+          0xC4 => reghi=a / R 0,
+          0xC5 => reghi=c / R 0,
+          0xC6 => reghi=d / R 0,
+          0xC7 => reghi=b / R 0,
       })
     }
   }