From a6f832285997644ed39a0f7af3d1df3d4188ee92 Mon Sep 17 00:00:00 2001
From: James Ross <james.a.ross@gmail.com>
Date: Mon, 2 Sep 2024 23:03:13 -0400
Subject: [PATCH] cleanup

---
 docs/info.md                | 25 ++++++++++++++-----------
 src/tt_um_nvious_graphics.v | 19 -------------------
 2 files changed, 14 insertions(+), 30 deletions(-)

diff --git a/docs/info.md b/docs/info.md
index ce1f04c..64d1928 100644
--- a/docs/info.md
+++ b/docs/info.md
@@ -1,20 +1,23 @@
-<!---
+## How it works
 
-This file is used to generate your project datasheet. Please fill in the information below and delete any unused
-sections.
+This is a VGA demo that runs without input, but also accepts 8-bit input on the `ui_io[7:0]` pins to display a virtual 7-segment LED display (with decimal).
 
-You can also include images in this folder and reference them in the markdown. Each image must be less than
-512 kb in size, and the combined size of all images must be less than 1 MB.
--->
+## How to test
 
-## How it works
+### Basic Functionality
 
-Explain how your project works
+Plug into a VGA monitor, select this circuit to test, and reset.
 
-## How to test
+### External Input
+
+To test the user input functionality, connect the `ui_io[7:0]` pins.  The idea
+is that this would be a possibly useful graphical extension to the dozens of
+existing projects that utilize the 7-segment LED display to show results.
+
+### Advanced Configuration
 
-Explain how to use your project
+TBD. (to configure LED colors/background)
 
 ## External hardware
 
-List external hardware used in your project (e.g. PMOD, LED display, etc), if any
+Requires the [TinyVGA PMOD](https://github.com/mole99/tiny-vga)
diff --git a/src/tt_um_nvious_graphics.v b/src/tt_um_nvious_graphics.v
index 50b640c..b3c51fe 100644
--- a/src/tt_um_nvious_graphics.v
+++ b/src/tt_um_nvious_graphics.v
@@ -49,8 +49,6 @@ module tt_um_nvious_graphics(
 		.vpos(y)
 	);
 
-	wire [5:0] color = 6'b111111;
-
 	wire a0 = y > 7;
 	wire a1 = x < y + 392;
 	wire a2 = 454 - x > y;
@@ -119,13 +117,9 @@ module tt_um_nvious_graphics(
 
 	wire mask = a | b | c | d | e | f | g | h;
 	wire [5:0] bg = (x[3] ^ y[3]) ? 6'b010101 : 6'b000000;
-	//wire [5:0] bg = mask ? ((x[0] ^ y[0]) ? 6'b010101 : ((x[3] ^ y[3]) ? 6'b010101 : 6'b000000)) : 6'b000000;
-	//wire [5:0] fg = (x[0] ^ y[0]) ? 6'b111111 : bg;
 	wire [5:0] mg = mask ? ((x[0] ^ y[0]) ? 6'b010101 : bg) : bg;
 	wire [5:0] fg = 6'b111111;
-	//assign RGB = video_active ? (a ? palette[0] : (b ? palette[1] : (c ? palette[2] : (d ? palette[3] : (e ? palette[4] : (f ? palette[5] : (g ? palette[6] : bg))))))) : 6'b000000;
 	assign RGB = video_active ? (((a & led[0]) | (b & led[1]) | (c & led[2]) | (d & led[3]) | (e & led[4]) | (f & led[5]) | (g & led[6]) | (h & led[7])) ? fg : mg) : 6'b000000;
-	//assign RGB = video_active ? (a?fg:(b?fg:(c?fg:(d?fg:(e?fg:(f?fg:(g?fg:(h?fg:bg)))))))):6'b000000;
 
 	always @(posedge vsync) begin
 		if (~rst_n) begin
@@ -137,19 +131,6 @@ module tt_um_nvious_graphics(
 		end
 	end
 
-	// color palette (RRGGBB)
-	reg [5:0] palette[0:7]; // RRGGBB
-	initial begin
-		palette[0] = 6'b000011;
-		palette[1] = 6'b001100;
-		palette[2] = 6'b001111;
-		palette[3] = 6'b110000;
-		palette[4] = 6'b110011;
-		palette[5] = 6'b111100;
-		palette[6] = 6'b111111;
-		palette[7] = 6'b101010;
-	end
-
 	reg [4:0] circle[0:31];
 	initial begin
 		circle[ 0] = 5'd31;