From 42811f868bfc0ffb0ae82ab7cf69a621f935b96b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jose=20Luis=20Monta=C3=B1es=20Ojados?=
 <joseluis@greenest.ai>
Date: Sun, 1 Mar 2026 03:44:57 +0100
Subject: [PATCH] add rom

---
 roadmap.md      |  2 +-
 rom/program.hex |  5 +++++
 rom/rom.v       | 21 +++++++++++++++++++++
 rom/rom_tb.v    | 44 ++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 71 insertions(+), 1 deletion(-)
 create mode 100644 rom/program.hex
 create mode 100644 rom/rom.v
 create mode 100644 rom/rom_tb.v

diff --git a/roadmap.md b/roadmap.md
index 4987f99..0ff6a91 100644
--- a/roadmap.md
+++ b/roadmap.md
@@ -352,7 +352,7 @@ gtkwave modulo.vcd
 - [x] Fase 2.3 — Shift Register
 - [x] Fase 2.4 — Register File
 - [x] Fase 3.1 — RAM sincrona
-- [ ] Fase 3.2 — ROM
+- [x] Fase 3.2 — ROM
 - [ ] Fase 3.3 — Stack
 - [ ] Fase 4.1 — FSM Semaforo
 - [ ] Fase 4.2 — UART TX
diff --git a/rom/program.hex b/rom/program.hex
new file mode 100644
index 0000000..a219390
--- /dev/null
+++ b/rom/program.hex
@@ -0,0 +1,5 @@
+BEEF
+1234
+ABCD
+0000
+FF00
diff --git a/rom/rom.v b/rom/rom.v
new file mode 100644
index 0000000..f72ebe7
--- /dev/null
+++ b/rom/rom.v
@@ -0,0 +1,21 @@
+/*
+    ROM
+*/
+
+module rom #(
+    parameter DEPTH = 256,
+    parameter W     = 16,
+    parameter FILE  = ""
+) (
+    input                       clk,
+    input [$clog2(DEPTH)-1:0]   addr,
+    output reg [W-1:0]          rd_data
+);
+    reg [W-1:0] mem [0:DEPTH-1];
+
+    initial $readmemh(FILE, mem);
+
+    always @(posedge clk) begin
+        rd_data <= mem[addr];        
+    end
+endmodule
\ No newline at end of file
diff --git a/rom/rom_tb.v b/rom/rom_tb.v
new file mode 100644
index 0000000..ab63a8a
--- /dev/null
+++ b/rom/rom_tb.v
@@ -0,0 +1,44 @@
+/*
+    ROM
+*/
+`include "rom/rom.v"
+
+module rom_tb;
+    reg clk;
+    reg [7:0]   addr;
+    wire [15:0] rd_data;
+
+    rom #(.FILE("rom/program.hex")) rom1(
+        .clk(clk),
+        .addr(addr),
+        .rd_data(rd_data)
+    );
+
+    initial clk = 0;
+    always #5 clk = ~clk;
+
+    initial begin
+        $dumpfile("rom/rom.vcd");
+        $dumpvars(0, rom_tb);
+
+        addr = 0;
+        @(posedge clk);
+        $display("addr=%d, rd_data=%x", addr, rd_data);
+        @(posedge clk);
+        $display("addr=%d, rd_data=%x", addr, rd_data);
+
+        addr = 1;
+        @(posedge clk);
+        $display("addr=%d, rd_data=%x", addr, rd_data);
+        @(posedge clk);
+        $display("addr=%d, rd_data=%x", addr, rd_data);
+
+        addr = 2;
+        @(posedge clk);
+        $display("addr=%d, rd_data=%x", addr, rd_data);
+        @(posedge clk);
+        $display("addr=%d, rd_data=%x", addr, rd_data);
+        
+        $finish;
+    end
+endmodule
\ No newline at end of file