add discussion links for LD/ST Comp Unit

diff --git a/3d_gpu/architecture/6600scoreboard.mdwn b/3d_gpu/architecture/6600scoreboard.mdwn
index fd623f2adbadaa2b4bad12d7990ae8aae8694da5..3371c4e954f0a7f5072fe927ba0d8ac90ae19382 100644 (file)
--- a/3d_gpu/architecture/6600scoreboard.mdwn
+++ b/3d_gpu/architecture/6600scoreboard.mdwn
@@ -134,6 +134,11 @@ a DFF (register).
 
 # LD/ST Computation Unit
 
+Discussions:
+
+* <http://lists.libre-riscv.org/pipermail/libre-riscv-dev/2020-April/006167.html>
+* <https://groups.google.com/forum/#!topic/comp.arch/qeMsE7UxvlI>
+
 The Load/Store Computation Unit is a little more complex, involving
 three functions: LOAD, STORE, and LOAD-UPDATE.  The SR Latches create
 a forward-progressing Finite State Machine, with three possible paths: