add category descriptions

diff --git a/simple_v_extension/opcodes.mdwn b/simple_v_extension/opcodes.mdwn
index 4ef2f3221896e53d4062652390edb6957efa9765..1bcf29253c72eae9ea51c754778bebda81186819 100644 (file)
--- a/simple_v_extension/opcodes.mdwn
+++ b/simple_v_extension/opcodes.mdwn
@@ -1,6 +1,7 @@
 # SimpleV Instruction Categorisation
 
-Based on information from Michael Clark's riscv-meta opcodes table, this
+Based on information from Michael Clark's riscv-meta opcodes table
+(with thanks to Michael for creating it), this
 page categorises and identifies the type of parallelism that SimpleV
 indirectly adds on each RISC-V **standard** opcode.  These are note-form:
 see [[specification]] for full details.