diff --git a/README.md b/README.md
index d9a5466..91b2400 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,8 @@ First-time writers of MIPS assembly may find this the most useful.
 
 ### Unimplemented
 
-* BC1F, BC1FL, BC1T, BC1TL
+As far as I know, all native R4300i instructions have been implemented.
+Whether or not they output the proper machine code is another thing.
 
 ### Unimplemented Pseudo-Instructions
 
diff --git a/lips.lua b/lips.lua
index c02c06e..511ea79 100644
--- a/lips.lua
+++ b/lips.lua
@@ -339,8 +339,10 @@ local instructions = {
     ROUND_W_S={17, 'DS', 'F0SDC', 12, fmt_single},
     SQRT_D  = {17, 'DS', 'F0SDC',  4, fmt_double},
     SQRT_S  = {17, 'DS', 'F0SDC',  4, fmt_single},
+    TRUNC_L_D={17, 'DS', 'F0SDC',  9, fmt_double},
     TRUNC_L_S={17, 'DS', 'F0SDC',  9, fmt_single},
     TRUNC_W_D={17, 'DS', 'F0SDC', 13, fmt_double},
+    TRUNC_W_S={17, 'DS', 'F0SDC', 13, fmt_double},
 
     TEQI    = {1, 'si', 'sCi', 12},
     TGEI    = {1, 'si', 'sCi',  8},
@@ -359,15 +361,11 @@ local instructions = {
     TLBWI   = {16, '', 'F000C',  2, 16},
     TLBWR   = {16, '', 'F000C',  6, 16},
 
-    -- 'c' is unimplemented
-    --BC1F    = {17, 'co', 'Cco', 8, 0},
-    --BC1FL   = {17, 'co', 'Cco', 8, 2},
-    --BC1T    = {17, 'co', 'Cco', 8, 1},
-    --BC1TL   = {17, 'co', 'Cco', 8, 3},
-    BC1F    = {},
-    BC1FL   = {},
-    BC1T    = {},
-    BC1TL   = {},
+    -- only one condition code on the R4300i?
+    BC1F    = {17, 'r', 'FCo', 0, 8},
+    BC1FL   = {17, 'r', 'FCo', 2, 8},
+    BC1T    = {17, 'r', 'FCo', 1, 8},
+    BC1TL   = {17, 'r', 'FCo', 3, 8},
 
     -- pseudo-instructions
     B       = {4, 'r', '00o'},
@@ -377,7 +375,7 @@ local instructions = {
     MOVE    = {0, 'dt', '0td0C', 32},
     NEG     = {0, 'ds', 's0d0C', 34},
     NOP     = {0, '', '0'},
-    NOR     = {0, 'dst', 's0d0C', 39},
+    NOT     = {0, 'ds', 's0d0C', 39},
     SUBI    = {8, 'tsk', 'sti'},
     SUBIU   = {9, 'tsk', 'sti'},