From f3092799de44cb357c96706961db38e3c62344c6 Mon Sep 17 00:00:00 2001
From: Julian Blake Kongslie
Date: Mon, 29 Mar 2021 14:39:48 -0700
Subject: Add a Fibonacci sequence to the end of output (no ASCII conversion
 yet)

---
 hdl/top.sv  |  2 +-
 mem/mem.hex | 31 +++++++++++++++++++------------
 2 files changed, 20 insertions(+), 13 deletions(-)

diff --git a/hdl/top.sv b/hdl/top.sv
index d224561..35279d4 100644
--- a/hdl/top.sv
+++ b/hdl/top.sv
@@ -165,7 +165,7 @@ always_ff @(posedge clk) begin
                 case (opcode)
                     'h1: begin
                         if (`mem_read_valid) begin
-                            acc = `mem_read_data;
+                            acc = acc + `mem_read_data;
                         end else begin
                             state = MEMORY;
                         end
diff --git a/mem/mem.hex b/mem/mem.hex
index 5c6ebe7..3979364 100644
--- a/mem/mem.hex
+++ b/mem/mem.hex
@@ -2,11 +2,27 @@
 
 040 // acc= 0x40
 f20 // idx
-100 // loop: load
+000 // loop: acc= 0
+100 // load
 300 // ifeq 0
-f80 // halt
+402 // jmp fib
 f44 // ++idx tx
-4fb // jmp loop
+4fa // jmp loop
+040 // fib: acc= 0x40
+f20 // idx
+000 // acc= 0
+200 // store
+f04 // ++idx
+001 // acc= 1
+200 // store
+f08 // fibloop: --idx
+000 // acc= 0
+100 // load
+f44 // ++idx tx
+100 // load
+f04 // ++idx
+200 // store
+4f8 // jmp fibloop
 
 @40
 
@@ -26,12 +42,3 @@ f44 // ++idx tx
 00a // \n
 
 000
-
-04f // O
-06f // o
-070 // p
-073 // s
-021 // !
-00a // \n
-
-000
-- 
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