diff --git a/README.md b/README.md
index 5e8cab7..9a4c7ac 100644
--- a/README.md
+++ b/README.md
@@ -13,23 +13,23 @@ The T400 is an 8-bit stack machine operating at 1Hz (due to ABMs only running on
 ### Instructions
 Any words encountered that aren't instructions are pushed to the stack. This makes very compact simple program code.
 
-| ins	 | function					|    mnemonic	|
-|--------|----------------------------------------------|---------------|
-|	255	| push program counter				| ppc		|
-|		254	| swap TOS						| swp		|
-|		253	| read memory from TOS				| read		|
-|		252	| write to memory from TOS				| write		|
-|		251	| add TOS						| add		|
-|		250	| suptract TOS					| sub		|
-|		249	| jump to TOS					| jmp		|
-|		248	| skip if TOS = zero				| sez		|
-|		247	| jump if TOS = zero				| jez		|
-|		246	| jump to subroutine, push pc to retstack		| jsr		|
-|		245	| return from subroutine, PC = top of retstack	| ret		|
-|		244	| duplicate TOS					| dup		|
-|		243	| drop TOS						| drop		|
-|	242	| halt processor					| hlt		|
-|	241	| pre-read address at TOS				| prd		|
+| ins	| function					|    mnemonic	|
+|-------|-----------------------------------------------|---------------|
+| 255	| push program counter				| ppc		|
+| 254	| swap TOS					| swp		|
+| 253	| read memory from TOS				| read		|
+| 252	| write to memory from TOS			| write		|
+| 251	| add TOS					| add		|
+| 250	| suptract TOS					| sub		|
+| 249	| jump to TOS					| jmp		|
+| 248	| skip if TOS = zero				| sez		|
+| 247	| jump if TOS = zero				| jez		|
+| 246	| jump to subroutine, push pc to retstack	| jsr		|
+| 245	| return from subroutine, PC = top of retstack	| ret		|
+| 244	| duplicate TOS					| dup		|
+| 243	| drop TOS					| drop		|
+| 242	| halt processor				| hlt		|
+| 241	| pre-read address at TOS			| prd		|
 
 ### I/O
 The T408 uses memory-mapped I/O. This may seem like a stupid idea on a machine with 8-bit addressing but port-based I/O isn't hugely sane.