From f0ef5caf32ed22096657c0ed987fd01bed65ba9a Mon Sep 17 00:00:00 2001
From: David Harris <david_harris@hmc.edu>
Date: Tue, 20 Dec 2022 11:22:26 -0800
Subject: [PATCH] Memory cleanup

---
 pipelined/src/generic/mem/ram2p1r1wb.sv | 6 ++++++
 pipelined/src/generic/mem/rom1p1r.sv    | 1 +
 2 files changed, 7 insertions(+)

diff --git a/pipelined/src/generic/mem/ram2p1r1wb.sv b/pipelined/src/generic/mem/ram2p1r1wb.sv
index ff3257eb..c11246d3 100644
--- a/pipelined/src/generic/mem/ram2p1r1wb.sv
+++ b/pipelined/src/generic/mem/ram2p1r1wb.sv
@@ -70,6 +70,12 @@ module ram2p1r1wb
 
   
   // SRAMs address busses are always registered first
+  // *** likely issued DH and RT 12/20/22
+  //   wrong enable for write port registers
+  //  prefer to code read like ram1p1rw
+  //  prefer not to have two-cycle write latency
+  //  will require branch predictor changes
+  
   flopenr #(DEPTH) RA1Reg(clk, reset, REN1, RA1, RA1Q);
   flopenr #(DEPTH) WA1Reg(clk, reset, REN1, WA1, WA1Q);
   flopr   #(1)     WEN1Reg(clk, reset, WEN1, WEN1Q);
diff --git a/pipelined/src/generic/mem/rom1p1r.sv b/pipelined/src/generic/mem/rom1p1r.sv
index daed8da5..bbdc246b 100644
--- a/pipelined/src/generic/mem/rom1p1r.sv
+++ b/pipelined/src/generic/mem/rom1p1r.sv
@@ -52,6 +52,7 @@ module rom1p1r
     if(ce) dout <= ROM[addr];    
   end
 
+  // for FPGA, initialize with zero-stage bootloader
   if(PRELOAD_ENABLED) begin
     initial begin
       ROM[0] =  64'h9581819300002197;