From cddbe0c46e62248fc62529219fef67449ec113f5 Mon Sep 17 00:00:00 2001
From: Trevor Merritt <trevor.merritt@gmail.com>
Date: Fri, 8 Nov 2024 09:42:28 -0500
Subject: [PATCH] fixes reset from exection completion adds 'default.oc8' adds
 control window size to state for load/save of settings maybe? moves
 TestCompressionTool code into InstructionUtil remove gemmautil and moves into
 gemma

---
 Cargo.lock                                    |  12 +-
 Cargo.toml                                    |   1 -
 gemma/Cargo.toml                              |   2 +
 {gemmautil => gemma}/src/bin/bin2hex.rs       |   0
 {gemmautil => gemma}/src/bin/ch8asm.rs        |  18 +
 {gemmautil => gemma}/src/bin/ch8disasm.rs     |   0
 gemma/src/bin/stringcomp.rs                   |  57 ---
 gemma/src/bin/tct.rs                          |  41 +++
 gemma/src/chip8/computer.rs                   |  24 +-
 gemma/src/chip8/computer_manager.rs           |   2 +-
 gemma/src/chip8/cpu_states.rs                 |   3 +-
 gemma/src/chip8/delay_timer.rs                |   2 +-
 gemma/src/chip8/instructions.rs               |  12 +-
 gemma/src/chip8/keypad.rs                     |   2 +-
 gemma/src/chip8/quirk_modes.rs                |   2 +-
 gemma/src/chip8/registers.rs                  |   2 +-
 gemma/src/chip8/sound_timer.rs                |   2 +-
 gemma/src/chip8/stack.rs                      |   2 +-
 gemma/src/chip8/system_memory.rs              |   2 +-
 gemma/src/chip8/util.rs                       | 129 ++++++-
 gemma/src/chip8/video.rs                      |  14 +-
 {gemmautil => gemma}/src/chip8_asm.pest       |   0
 {gemmautil => gemma}/tests/assmber_tests.rs   |   0
 gemma/tests/state_tests.rs                    |  38 +-
 gemma/tests/{ => unit_tests}/unit_tests.rs    |   8 +-
 gemmaimgui/src/bin/gemmaimgui.rs              |   1 -
 gemmaimgui/src/bin/support/emmagui_support.rs | 341 +++++++++---------
 gemmaimgui/src/bin/support/gui_file_list.rs   |  28 +-
 gemmaimgui/src/bin/support/mod.rs             |   2 +-
 gemmaimgui/src/bin/support/ui_state.rs        |  14 +-
 gemmautil/Cargo.toml                          |  10 -
 resources/custom/002-schip-scroll-tests.ch8   | Bin 26 -> 26 bytes
 resources/custom/sinusoid_schip.ch8           | Bin 0 -> 282 bytes
 resources/roms/gradsim.ch8                    | Bin 0 -> 1326 bytes
 resources/roms/octo-default.ch8               | Bin 0 -> 56 bytes
 resources/roms/sinusoid_schip.ch8             | Bin 0 -> 282 bytes
 resources/roms/vertical_clip.ch8              | Bin 0 -> 103 bytes
 .../state/computer_001_system_zero_state.tct  | Bin 0 -> 462 bytes
 ..._001_round_trip_serialize_deserialize.json |   2 +-
 ...trip_serialize_deserialize_compressed.tflt |   1 -
 ...lowres_schip_draw_chip8_sprite_result.json |   0
 41 files changed, 464 insertions(+), 310 deletions(-)
 rename {gemmautil => gemma}/src/bin/bin2hex.rs (100%)
 rename {gemmautil => gemma}/src/bin/ch8asm.rs (74%)
 rename {gemmautil => gemma}/src/bin/ch8disasm.rs (100%)
 delete mode 100644 gemma/src/bin/stringcomp.rs
 create mode 100644 gemma/src/bin/tct.rs
 rename {gemmautil => gemma}/src/chip8_asm.pest (100%)
 rename {gemmautil => gemma}/tests/assmber_tests.rs (100%)
 rename gemma/tests/{ => unit_tests}/unit_tests.rs (99%)
 delete mode 100644 gemmautil/Cargo.toml
 create mode 100644 resources/custom/sinusoid_schip.ch8
 create mode 100644 resources/roms/gradsim.ch8
 create mode 100644 resources/roms/octo-default.ch8
 create mode 100644 resources/roms/sinusoid_schip.ch8
 create mode 100644 resources/roms/vertical_clip.ch8
 create mode 100644 resources/test/state/computer_001_system_zero_state.tct
 delete mode 100644 resources/test/state/smoke_002_round_trip_serialize_deserialize_compressed.tflt
 delete mode 100644 resources/test/state/video_lowres_schip_draw_chip8_sprite_result.json

diff --git a/Cargo.lock b/Cargo.lock
index c08abba..4109af0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1789,6 +1789,8 @@ dependencies = [
  "flate2",
  "hex",
  "log",
+ "pest",
+ "pest_derive",
  "pretty_env_logger",
  "rand 0.9.0-alpha.2",
  "serde",
@@ -1845,16 +1847,6 @@ dependencies = [
  "gemma",
 ]
 
-[[package]]
-name = "gemmautil"
-version = "0.1.0"
-dependencies = [
- "clap",
- "gemma",
- "pest",
- "pest_derive",
-]
-
 [[package]]
 name = "generic-array"
 version = "0.14.7"
diff --git a/Cargo.toml b/Cargo.toml
index 0d87745..6e4967b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,6 @@ members = [
     "gemmaimgui",
     "gemmatelnet",
     "gemmasdl2",
-    "gemmautil",
 ]
 resolver = "2"
 
diff --git a/gemma/Cargo.toml b/gemma/Cargo.toml
index c9ac8c0..4f1af75 100644
--- a/gemma/Cargo.toml
+++ b/gemma/Cargo.toml
@@ -16,3 +16,5 @@ serde_json.workspace = true
 flate2 = "1.0"
 clap = { version = "4.5.20", features = ["derive"] }
 hex = "0.4.3"
+pest = { version = "2.7.14" }
+pest_derive = { version = "2.7.14"}
\ No newline at end of file
diff --git a/gemmautil/src/bin/bin2hex.rs b/gemma/src/bin/bin2hex.rs
similarity index 100%
rename from gemmautil/src/bin/bin2hex.rs
rename to gemma/src/bin/bin2hex.rs
diff --git a/gemmautil/src/bin/ch8asm.rs b/gemma/src/bin/ch8asm.rs
similarity index 74%
rename from gemmautil/src/bin/ch8asm.rs
rename to gemma/src/bin/ch8asm.rs
index 914ecd4..114abab 100644
--- a/gemmautil/src/bin/ch8asm.rs
+++ b/gemma/src/bin/ch8asm.rs
@@ -2,6 +2,7 @@ use gemma::chip8::util::InstructionUtil;
 use gemma::chip8::{instructions::Chip8CpuInstructions, quirk_modes::QuirkMode};
 use std::fs::{self, File};
 use std::io::Write;
+use clap::{Arg, Command};
 // Ch8Asm
 // Converts well formed CH8ASM.
 // no variables.
@@ -16,9 +17,26 @@ use pest_derive::Parser;
 #[grammar = "chip8_asm.pest"]
 pub struct Chip8AsmParser;
 
+
 fn main() {
     println!("Taxation is Theft");
 
+    let matches = Command::new("Chip8Assembler")
+        .version("0.0.1")
+        .author("Trevor Merritt <trevor.merritt@geekback.dev>")
+        .about("Tool to assemble simple ASM into Chip8 Machine code")
+        .arg(
+            Arg::new("input-file")
+                .help("Name of file to assemble")
+                .required(true)
+        )
+        .arg(
+            Arg::new("output-file")
+                .help("Name of file to create")
+                .required(false)
+        )
+        .get_matches();
+
     let unparsed = fs::read_to_string("resources/test/gemma_disassembler_manual_document.asc")
         .expect("Unable to read input");
 
diff --git a/gemmautil/src/bin/ch8disasm.rs b/gemma/src/bin/ch8disasm.rs
similarity index 100%
rename from gemmautil/src/bin/ch8disasm.rs
rename to gemma/src/bin/ch8disasm.rs
diff --git a/gemma/src/bin/stringcomp.rs b/gemma/src/bin/stringcomp.rs
deleted file mode 100644
index 0b235bf..0000000
--- a/gemma/src/bin/stringcomp.rs
+++ /dev/null
@@ -1,57 +0,0 @@
-use clap::{Parser, Subcommand};
-use flate2::{write::{GzEncoder, GzDecoder}, Compression};
-use std::io::prelude::*;
-use std::io::{self, Write};
-
-#[derive(Parser)]
-#[command(author, version, about = "Compress or decompress a string", long_about = None)]
-struct Cli {
-    /// Subcommand: either 'compress' or 'decompress'
-    #[command(subcommand)]
-    command: Commands,
-}
-
-#[derive(Subcommand)]
-enum Commands {
-    /// Compress the input string
-    Compress {
-        /// The string to compress
-        input: String,
-    },
-    /// Decompress the input string (must be compressed format)
-    Decompress {
-        /// The compressed string to decompress, in hex format
-        input: String,
-    },
-}
-
-fn compress_string(input: &str) -> Vec<u8> {
-    let mut encoder = GzEncoder::new(Vec::new(), Compression::default());
-    encoder.write_all(input.as_bytes()).expect("Compression failed");
-    encoder.finish().expect("Failed to finish compression")
-}
-
-fn decompress_string(input: &[u8]) -> String {
-    let mut decoder = GzDecoder::new(Vec::new());
-    decoder.write_all(input).expect("Decompression failed");
-    let decompressed_data = decoder.finish().expect("Failed to finish decompression");
-    String::from_utf8(decompressed_data).expect("Invalid UTF-8")
-}
-
-fn main() {
-    let cli = Cli::parse();
-
-    match cli.command {
-        Commands::Compress { input } => {
-            let compressed = compress_string(&input);
-            // Convert to hex format for easier readability in the terminal
-            println!("Compressed (hex): {:?} / from {}b to {}b", hex::encode(compressed.clone()), input.len(), compressed.len());
-        }
-        Commands::Decompress { input } => {
-            // Decode hex string back to bytes
-            let compressed_bytes = hex::decode(input).expect("Invalid hex input");
-            let decompressed = decompress_string(&compressed_bytes);
-            println!("Decompressed: {}", decompressed);
-        }
-    }
-}
diff --git a/gemma/src/bin/tct.rs b/gemma/src/bin/tct.rs
new file mode 100644
index 0000000..2e17380
--- /dev/null
+++ b/gemma/src/bin/tct.rs
@@ -0,0 +1,41 @@
+use clap::{ArgGroup, Parser};
+use gemma::chip8::util::InstructionUtil;
+/// TCT
+/// Test Compression Tool
+///
+/// A Tool to take a plaintext JSON object of the memory state
+/// for the CHIP-8 emulator and compress the input into compressed
+/// text.  Test sizes go from ~22k to ~1k which makes a difference over
+/// hundreds of tests
+/// Written by Trevor Merritt and optimized by ChatGPT
+
+/// Simple file compression and decompression tool
+#[derive(Parser, Debug)]
+#[command(author, version, about)]
+#[clap(group(
+    ArgGroup::new("mode")
+        .required(true)
+        .args(["compress", "decompress"]),
+))]
+struct Cli {
+    /// The filename to process
+    filename: String,
+
+    /// Compress the file
+    #[arg(short = 'c', long = "compress", group = "mode")]
+    compress: bool,
+
+    /// Decompress the file
+    #[arg(short = 'd', long = "decompress", group = "mode")]
+    decompress: bool,
+}
+
+fn main() {
+    let cli = Cli::parse();
+
+    if cli.compress {
+        InstructionUtil::compress_file(cli.filename).expect("Derp.  Can't do that.");
+    } else if cli.decompress {
+        InstructionUtil::decompress_file(cli.filename).expect("Derp.  Can't do that.");
+    }
+}
diff --git a/gemma/src/chip8/computer.rs b/gemma/src/chip8/computer.rs
index c34db82..cc2fd33 100644
--- a/gemma/src/chip8/computer.rs
+++ b/gemma/src/chip8/computer.rs
@@ -1,3 +1,8 @@
+use super::{
+    cpu_states::Chip8CpuStates, instructions::Chip8CpuInstructions,
+    system_memory::Chip8SystemMemory, video::Chip8Video,
+};
+use crate::chip8::cpu_states::Chip8CpuStates::WaitingForInstruction;
 use crate::chip8::delay_timer::DelayTimer;
 use crate::chip8::keypad::Keypad;
 use crate::chip8::quirk_modes::QuirkMode;
@@ -7,12 +12,7 @@ use crate::chip8::stack::Chip8Stack;
 use log::debug;
 use serde::{Deserialize, Serialize};
 
-use super::{
-    cpu_states::Chip8CpuStates, instructions::Chip8CpuInstructions,
-    system_memory::Chip8SystemMemory, video::Chip8Video,
-};
-
-#[derive(Clone, Serialize, Deserialize, Debug)]
+#[derive(Clone, Serialize, Deserialize, Debug, PartialEq)]
 pub struct Chip8Computer {
     pub num_cycles: i32,
     pub memory: Chip8SystemMemory,
@@ -52,6 +52,7 @@ impl Chip8Computer {
         self.stack.reset();
         self.memory.reset(quirk_mode);
         self.quirk_mode = quirk_mode;
+        self.state = WaitingForInstruction;
     }
 
     pub fn dump_keypad_to_string(&self) -> String {
@@ -117,8 +118,19 @@ impl Chip8Computer {
             Chip8CpuStates::WaitingForKey => {
                 debug!("waiting for a key press...");
             }
+            Chip8CpuStates::ExecutionComplete => {
+                debug!("Execution has completed.");
+                self.num_cycles += 1;
+            }
             _ => {}
         }
         self
     }
+
+    pub fn serialize(&self) -> String {
+        serde_json::to_string(&self).expect("Serialization failed")
+    }
+    pub fn deserialize(from: String) -> Chip8Computer {
+        serde_json::from_str(&from).expect("Failed to deserialize")
+    }
 }
diff --git a/gemma/src/chip8/computer_manager.rs b/gemma/src/chip8/computer_manager.rs
index 9cea84f..2401a1e 100644
--- a/gemma/src/chip8/computer_manager.rs
+++ b/gemma/src/chip8/computer_manager.rs
@@ -118,7 +118,7 @@ impl Chip8ComputerManager {
         self.computer.load_bytes_to_memory(0x200, &bytes_to_load);
     }
 
-    pub fn dump_to_string(&self, dump_type: ManagerDumpables) -> String {
+    pub fn dump_to_string(&self, dump_type: ManagerDumpables) -> String{
         match dump_type {
             ManagerDumpables::Video => self.computer.video_memory.format_as_string(),
             ManagerDumpables::Registers => self.computer.registers.format_as_string(),
diff --git a/gemma/src/chip8/cpu_states.rs b/gemma/src/chip8/cpu_states.rs
index b0fa9d2..6cedeb3 100644
--- a/gemma/src/chip8/cpu_states.rs
+++ b/gemma/src/chip8/cpu_states.rs
@@ -1,10 +1,11 @@
 use serde::{Deserialize, Serialize};
 
-#[derive(Clone, Copy, Default, Serialize, Deserialize, Debug)]
+#[derive(Clone, Copy, Default, Serialize, Deserialize, Debug, PartialEq)]
 pub enum Chip8CpuStates {
     #[default]
     WaitingForInstruction,
     WaitingForKey,
     ExecutingInstruction,
     Error,
+    ExecutionComplete,
 }
diff --git a/gemma/src/chip8/delay_timer.rs b/gemma/src/chip8/delay_timer.rs
index cee823a..0b8b45f 100644
--- a/gemma/src/chip8/delay_timer.rs
+++ b/gemma/src/chip8/delay_timer.rs
@@ -1,6 +1,6 @@
 use serde::{Deserialize, Serialize};
 
-#[derive(Clone, Copy, Serialize, Deserialize, Debug)]
+#[derive(Clone, Copy, Serialize, Deserialize, Debug, PartialEq)]
 pub struct DelayTimer {
     counter: u8,
 }
diff --git a/gemma/src/chip8/instructions.rs b/gemma/src/chip8/instructions.rs
index 08fd579..3d2e043 100644
--- a/gemma/src/chip8/instructions.rs
+++ b/gemma/src/chip8/instructions.rs
@@ -11,7 +11,7 @@ use std::ascii::AsciiExt;
 use std::fmt::{Debug, Display, Formatter};
 use std::ops::BitAnd;
 use std::time::Instant;
-
+use crate::chip8::cpu_states::Chip8CpuStates;
 /*
 nnn or addr - A 12-bit value, the lowest 12 bits of the instruction
 n or nibble - A 4-bit value, the lowest 4 bits of the instruction
@@ -326,9 +326,9 @@ impl Chip8CpuInstructions {
             Chip8CpuInstructions::HIGH => INST_HIGH,
             Chip8CpuInstructions::ORY(_, _) => INST_ORY,
             JPX(_, _) => INST_JPX,
+            DW(_) => INST_DW,
             XXXXERRORINSTRUCTION => "XX ERROR XX",
             SCU(_) => INST_SCU,
-            DW(_) => INST_DW,
         }
     }
 
@@ -681,7 +681,7 @@ impl Chip8CpuInstructions {
         }
     }
     pub fn execute(&self, input: &mut Chip8Computer) -> Chip8Computer {
-        //        print!("INSTRUCTION {}", self);
+        println!("INSTRUCTION {}", self);
         let start_time = Instant::now();
         let start_pc = input.registers.peek_pc();
         input.registers.poke_pc(start_pc + 2);
@@ -700,6 +700,12 @@ impl Chip8CpuInstructions {
             }
             // 0x1nnn Jump to Address
             Chip8CpuInstructions::JPA(new_address) => {
+                // if the jump is to the same address as we are at, we are in an infinite
+                // loop and the program  is effectively done.  stop the CPU.
+                if *new_address == start_pc {
+                    input.state = Chip8CpuStates::ExecutionComplete;
+                    println!("Execution complete.");
+                }
                 input.registers.poke_pc(*new_address);
             }
             // 0x2nnn Call Subroutine
diff --git a/gemma/src/chip8/keypad.rs b/gemma/src/chip8/keypad.rs
index 1a032a6..4f4d0aa 100644
--- a/gemma/src/chip8/keypad.rs
+++ b/gemma/src/chip8/keypad.rs
@@ -2,7 +2,7 @@ use serde::{Deserialize, Serialize};
 
 use crate::constants::CHIP8_KEYBOARD;
 
-#[derive(Clone, Copy, Default, Serialize, Deserialize, Debug)]
+#[derive(Clone, Copy, Default, Serialize, Deserialize, Debug, PartialEq)]
 pub struct Keypad {
     keys: [bool; 0x10],
 }
diff --git a/gemma/src/chip8/quirk_modes.rs b/gemma/src/chip8/quirk_modes.rs
index 26d3caa..0a26ab5 100644
--- a/gemma/src/chip8/quirk_modes.rs
+++ b/gemma/src/chip8/quirk_modes.rs
@@ -1,7 +1,7 @@
 use serde::{Deserialize, Serialize};
 use std::fmt::Display;
 
-#[derive(Default, Clone, Serialize, Deserialize, Copy, Debug)]
+#[derive(Default, Clone, Serialize, Deserialize, Copy, Debug, PartialEq)]
 pub enum QuirkMode {
     Chip8,
     XOChip,
diff --git a/gemma/src/chip8/registers.rs b/gemma/src/chip8/registers.rs
index 4fbdc3e..b19ee71 100644
--- a/gemma/src/chip8/registers.rs
+++ b/gemma/src/chip8/registers.rs
@@ -2,7 +2,7 @@ use serde::{Deserialize, Serialize};
 
 /// Registers.  numbered 1-16 publicly.
 /// Privately using zero base array so -1 to shift from pub to priv.
-#[derive(Clone, Copy, Serialize, Deserialize, Debug)]
+#[derive(Clone, Copy, Serialize, Deserialize, Debug, PartialEq)]
 pub struct Chip8Registers {
     pub registers: [u8; 16],
     pub i_register: u16,
diff --git a/gemma/src/chip8/sound_timer.rs b/gemma/src/chip8/sound_timer.rs
index 8cf1f31..df2e9bc 100644
--- a/gemma/src/chip8/sound_timer.rs
+++ b/gemma/src/chip8/sound_timer.rs
@@ -1,7 +1,7 @@
 use log::trace;
 use serde::{Deserialize, Serialize};
 
-#[derive(Clone, Copy, Serialize, Deserialize, Debug)]
+#[derive(Clone, Copy, Serialize, Deserialize, Debug, PartialEq)]
 pub struct SoundTimer {
     counter: i32,
 }
diff --git a/gemma/src/chip8/stack.rs b/gemma/src/chip8/stack.rs
index eb58ab3..7508510 100644
--- a/gemma/src/chip8/stack.rs
+++ b/gemma/src/chip8/stack.rs
@@ -1,6 +1,6 @@
 use serde::{Deserialize, Serialize};
 
-#[derive(Clone, Default, Serialize, Deserialize, Debug)]
+#[derive(Clone, Default, Serialize, Deserialize, Debug, PartialEq)]
 pub struct Chip8Stack {
     items: Vec<u16>,
 }
diff --git a/gemma/src/chip8/system_memory.rs b/gemma/src/chip8/system_memory.rs
index 5a68a44..0d3a017 100644
--- a/gemma/src/chip8/system_memory.rs
+++ b/gemma/src/chip8/system_memory.rs
@@ -7,7 +7,7 @@ use serde::Serialize;
 use super::quirk_modes;
 use super::quirk_modes::QuirkMode;
 
-#[derive(Clone, Serialize, Deserialize, Debug)]
+#[derive(Clone, Serialize, Deserialize, Debug, PartialEq)]
 pub struct Chip8SystemMemory {
     memory: Vec<u8>,
 }
diff --git a/gemma/src/chip8/util.rs b/gemma/src/chip8/util.rs
index c243951..0a6c600 100644
--- a/gemma/src/chip8/util.rs
+++ b/gemma/src/chip8/util.rs
@@ -1,3 +1,11 @@
+use flate2::read::ZlibDecoder;
+use std::fs::File;
+use std::io::{self, Read, Write};
+use std::path::{Path, PathBuf};
+
+use flate2::write::ZlibEncoder;
+use flate2::Compression;
+
 pub struct InstructionUtil {}
 
 impl InstructionUtil {
@@ -29,7 +37,6 @@ impl InstructionUtil {
     }
 
     pub fn join_bytes(high: u8, low: u8) -> u16 {
-        
         (high as u16) << 8 | low as u16
     }
 
@@ -40,7 +47,7 @@ impl InstructionUtil {
 
     // n or nibble - A 4-bit value, the lowest 4 bits of the instruction
     pub fn read_nibble_from_instruction(instruction_to_read_from: u16) -> u8 {
-       ( instruction_to_read_from & 0x000F )as u8
+        (instruction_to_read_from & 0x000F) as u8
     }
 
     // x - A 4-bit value, the lower 4 bits of the high byte of the instruction
@@ -61,4 +68,122 @@ impl InstructionUtil {
     pub fn read_upper_byte_lower_nibble(to_read_from: u16) -> u8 {
         ((to_read_from & 0x0f00) >> 8) as u8
     }
+
+    pub fn compress_file<P: AsRef<Path>>(to_compress: P) -> io::Result<()> {
+        let to_compress_path = to_compress.as_ref();
+        let target_filename = format!("{}.tct", to_compress_path.display());
+        println!(
+            "Compressing file: {} to {}",
+            to_compress_path.display(),
+            target_filename
+        );
+
+        // Open the source file
+        let mut source_file = File::open(&to_compress_path)?;
+
+        // Read the entire file into a buffer
+        let mut read_buffer = Vec::new();
+        source_file.read_to_end(&mut read_buffer)?;
+
+        // Initialize the encoder and compress the read data
+        let mut encoder = ZlibEncoder::new(Vec::new(), Compression::default());
+        encoder.write_all(&read_buffer)?;
+        let encoded_data = encoder.finish()?;
+
+        println!(
+            "Compressed {} bytes into {} bytes.",
+            read_buffer.len(),
+            encoded_data.len()
+        );
+
+        // Write the encoded data to the target file
+        let mut target_file = File::create(target_filename)?;
+        target_file.write_all(&encoded_data)?;
+
+        Ok(())
+    }
+
+    pub fn decompress_file_to_string<P: AsRef<Path>>(to_decompress: P) -> io::Result<String> {
+        let to_decompress_path = to_decompress.as_ref();
+
+        // Ensure the file has the expected `.tct` extension
+        if to_decompress_path.extension() != Some("tct".as_ref()) {
+            return Err(io::Error::new(
+                io::ErrorKind::InvalidInput,
+                "File must have a .tct extension",
+            ));
+        }
+
+        println!(
+            "Decompressing file: {} to string",
+            to_decompress_path.display()
+        );
+
+        // Open the compressed file and set up the decoder
+        let compressed_file = File::open(&to_decompress_path)?;
+        let mut decoder = ZlibDecoder::new(compressed_file);
+
+        // Read decompressed data
+        let mut decompressed_data = Vec::new();
+        decoder.read_to_end(&mut decompressed_data)?;
+
+        // Convert decompressed byte data to a UTF-8 String
+        match String::from_utf8(decompressed_data) {
+            Ok(decompressed_string) => {
+                // Optionally, write decompressed data to a new file
+                println!(
+                    "Decompressed {} bytes into {} bytes.",
+                    to_decompress_path.metadata()?.len(),
+                    decompressed_string.len()
+                );
+
+                Ok(decompressed_string)
+            }
+            Err(e) => {
+                // Handle invalid UTF-8 data (if the decompressed data isn't valid UTF-8)
+                Err(io::Error::new(io::ErrorKind::InvalidData, e))
+            }
+        }
+    }
+    pub fn decompress_file<P: AsRef<Path>>(to_decompress: P) -> io::Result<()> {
+        let to_decompress_path = to_decompress.as_ref();
+
+        // Ensure the file has the expected `.tct` extension
+        if to_decompress_path.extension() != Some("tct".as_ref()) {
+            return Err(io::Error::new(
+                io::ErrorKind::InvalidInput,
+                "File must have a .tct extension",
+            ));
+        }
+
+        // Derive the output filename by removing the `.tct` extension
+        let mut output_filename = PathBuf::from(to_decompress_path);
+        output_filename.set_extension("untct"); // Remove .tct extension to restore original file name
+
+        println!(
+            "Decompressing file: {} to {}",
+            to_decompress_path.display(),
+            output_filename.display()
+        );
+
+        // Open the compressed file and set up the decoder
+        let compressed_file = File::open(&to_decompress_path)?;
+        let mut decoder = ZlibDecoder::new(compressed_file);
+
+        // Read decompressed data
+        let mut decompressed_data = Vec::new();
+        decoder.read_to_end(&mut decompressed_data)?;
+
+        // Write decompressed data to the output file
+        let mut output_file = File::create(&output_filename)?;
+        output_file.write_all(&decompressed_data)?;
+
+        println!(
+            "Decompressed {} bytes into {} bytes.",
+            to_decompress_path.metadata()?.len(),
+            decompressed_data.len()
+        );
+
+        Ok(())
+    }
 }
diff --git a/gemma/src/chip8/video.rs b/gemma/src/chip8/video.rs
index 146d735..f00fef9 100644
--- a/gemma/src/chip8/video.rs
+++ b/gemma/src/chip8/video.rs
@@ -6,13 +6,13 @@ use crate::constants::{
 use log::debug;
 use serde::{Deserialize, Serialize};
 
-#[derive(Clone, Copy, Serialize, Deserialize, Debug)]
+#[derive(Clone, Copy, Serialize, Deserialize, Debug, PartialEq)]
 pub enum Chip8VideoModes {
     LowRes,
     HighRes,
 }
 
-#[derive(Clone, Serialize, Deserialize, Debug)]
+#[derive(Clone, Serialize, Deserialize, Debug, PartialEq)]
 pub struct Chip8Video {
     memory: Vec<bool>,
     pub has_frame_changed: bool,
@@ -36,7 +36,8 @@ impl Chip8Video {
     }
 
     pub fn set_lowres(&mut self) {
-        self.current_res = LowRes
+        self.current_res = LowRes;
+        self.cls();
     }
 
     pub fn get_screen_resolution(&mut self) -> Chip8VideoModes {
@@ -152,7 +153,6 @@ impl Chip8Video {
     }
 
     pub fn scroll_right(&mut self) {
-        println!("SCROLLRIGHTPRE:::[{}]", self.format_as_string());
         let (width, height) = self.get_resolution();
 
         for current_row in 0..height {
@@ -168,11 +168,9 @@ impl Chip8Video {
             // Clear the first 4 pixels in the current row
             self.memory[row_offset..row_offset + 4].fill(false);
         }
-        println!("SCROLLRIGHTPOST:::[{}]", self.format_as_string());
     }
 
     pub fn scroll_left(&mut self) {
-        println!("SCROLLLEFTPRE:::[{}]", self.format_as_string());
         let (width, height) = self.get_resolution();
 
         for current_row in 0..height {
@@ -181,7 +179,6 @@ impl Chip8Video {
                 let target: usize = (row_offset + current_column) as usize;
                 let source: usize = target + 4;
                 self.memory[target] = self.memory[source];
-                println!("Moving from {source} to {target}");
             }
 
             let clear_start: usize = (row_offset + width - 4) as usize;
@@ -189,7 +186,6 @@ impl Chip8Video {
 
             self.memory[clear_start..clear_end].fill(false);
         }
-        println!("SCROLLLEFTPOST:::[{}]", self.format_as_string());
     }
 
     pub fn scroll_up(&mut self, how_far: &u8) {
@@ -240,7 +236,7 @@ impl Default for Chip8Video {
         Chip8Video {
             memory: mem,
             has_frame_changed: false,
-            current_res: Chip8VideoModes::LowRes,
+            current_res: LowRes,
         }
     }
 }
diff --git a/gemmautil/src/chip8_asm.pest b/gemma/src/chip8_asm.pest
similarity index 100%
rename from gemmautil/src/chip8_asm.pest
rename to gemma/src/chip8_asm.pest
diff --git a/gemmautil/tests/assmber_tests.rs b/gemma/tests/assmber_tests.rs
similarity index 100%
rename from gemmautil/tests/assmber_tests.rs
rename to gemma/tests/assmber_tests.rs
diff --git a/gemma/tests/state_tests.rs b/gemma/tests/state_tests.rs
index e0f51bf..987df04 100644
--- a/gemma/tests/state_tests.rs
+++ b/gemma/tests/state_tests.rs
@@ -1,26 +1,24 @@
+use std::fs::File;
 use flate2::write::{GzDecoder, GzEncoder};
 use flate2::Compression;
 use gemma::chip8::computer::Chip8Computer;
+use gemma::chip8::util::InstructionUtil;
+use std::io;
 use std::io::prelude::*;
 
 fn load_result(to_load: &str) -> String {
-    let full_path = format!("resources/test/state/{}", to_load);
+    let full_path = format!("../resources/test/state/{}", to_load);
     println!("Loading state => (([{}]))", full_path);
     std::fs::read_to_string(full_path).unwrap()
 }
 
 fn load_compressed_result(file_path: &str) -> io::Result<String> {
-    // Load the compressed file contents
-    let compressed_data = fs::read(file_path)?;
-
-    // Create a GzDecoder to uncompress the data
-    let mut decoder = GzDecoder::new(&compressed_data[..]);
-    let mut decompressed_data = String::new();
-
-    // Read the decompressed data directly into a String
-    decoder.read_to_string(&mut decompressed_data)?;
-
-    Ok(decompressed_data)
+    let full_path = format!("../resources/test/state/{}", file_path);
+    println!(
+        "ATTEMPTING TO LOAD {} AS A COMPRESSED TEST RESULT.",
+        full_path
+    );
+    InstructionUtil::decompress_file_to_string(full_path)
 }
 
 fn load_rom(to_load: &str) -> Vec<u8> {
@@ -33,21 +31,21 @@ fn test_serialization_round_trip() {
     let expected_json = load_result("smoke_001_round_trip_serialize_deserialize.json");
 
     // Serialize the Chip8Computer instance
-    let serialized = serde_json::to_string(&original_computer).expect("Serialization failed");
+    let serialized = Chip8Computer::serialize(&original_computer);
+    let deserialized = Chip8Computer::deserialize(expected_json.clone());
 
     // Compare the serialized output to the expected JSON
     println!("Serialized Output: [{}]", serialized);
+
     assert_eq!(
         serialized.trim(),
-        expected_json.trim(),
+        expected_json.clone().trim(),
         "Serialized output does not match expected JSON"
     );
 
     // Deserialize back to Chip8Computer and assert equality
-    let deserialized_computer: Chip8Computer =
-        serde_json::from_str(&serialized).expect("Deserialization failed");
     assert_eq!(
-        deserialized_computer, original_computer,
+        deserialized, original_computer,
         "Deserialized instance does not match the original"
     );
 }
@@ -55,9 +53,9 @@ fn test_serialization_round_trip() {
 #[test]
 fn computer_001_system_zero_state() {
     let x = Chip8Computer::new();
-    let expected_string = load_compressed_result("smoke_002_round_trip_serialize_deserialize.tflt");
-    let serialized = serde_json::to_string(&x).unwrap();
+    let expected_string = load_compressed_result("computer_001_system_zero_state.tct")
+        .expect("Unable to read result");
+    let serialized = x.serialize();
     assert_eq!(serialized, expected_string);
 }
 
-}
diff --git a/gemma/tests/unit_tests.rs b/gemma/tests/unit_tests/unit_tests.rs
similarity index 99%
rename from gemma/tests/unit_tests.rs
rename to gemma/tests/unit_tests/unit_tests.rs
index 971c64e..7095f57 100644
--- a/gemma/tests/unit_tests.rs
+++ b/gemma/tests/unit_tests/unit_tests.rs
@@ -35,11 +35,13 @@ fn decoder_test_invalid_instructions() {
     ];
 
     for i in invalid_to_encode {
-        assert_eq!(Chip8CpuInstructions::decode(i, &Chip8).encode(), 0xffff);
+        println!("TESTING 0x{i:04x}");
+        println!("DECOODED TO {:?}", Chip8CpuInstructions::decode(i, &Chip8));
         assert!(matches!(
             Chip8CpuInstructions::decode(i, &Chip8),
-            Chip8CpuInstructions::XXXXERRORINSTRUCTION
-        ));
+            Chip8CpuInstructions::DW(i)
+        ) ||
+        matches!(Chip8CpuInstructions::decode(i, &Chip8), Chip8CpuInstructions::XXXXERRORINSTRUCTION));
     }
 }
 
diff --git a/gemmaimgui/src/bin/gemmaimgui.rs b/gemmaimgui/src/bin/gemmaimgui.rs
index 2440ac9..b1a31fa 100644
--- a/gemmaimgui/src/bin/gemmaimgui.rs
+++ b/gemmaimgui/src/bin/gemmaimgui.rs
@@ -74,7 +74,6 @@ fn main() {
                 system.wait_for_instruction();
             } else {
                 // do we need to release it?
-
                 if system.is_key_pressed(key_reg) {
                     system.release_key(key_reg);
                 }
diff --git a/gemmaimgui/src/bin/support/emmagui_support.rs b/gemmaimgui/src/bin/support/emmagui_support.rs
index 3dad500..90902aa 100644
--- a/gemmaimgui/src/bin/support/emmagui_support.rs
+++ b/gemmaimgui/src/bin/support/emmagui_support.rs
@@ -12,6 +12,8 @@ use log::debug;
 use std::fs::File;
 use std::io::Read;
 use std::path::{Path, PathBuf};
+use imgui::sys::ImGuiIO;
+use gemma::chip8::instructions::Chip8CpuInstructions;
 
 const ROM_ROOT: &str = "resources/roms";
 
@@ -43,70 +45,186 @@ impl GemmaImguiSupport {
     pub fn video_display(system_to_control: &Chip8Computer, gui_state: &ImGuiUiState, ui: &Ui) {
         // draw area size
         let (width, height) = system_to_control.video_memory.get_resolution();
-        let draw_area_size = ui.io().display_size;
-        //  println!("DRAW_AREA_SIZE = {}x{}", draw_area_size[0], draw_area_size[1]);
-        let cell_width = ((draw_area_size[0] as i32 / width) * 6) / 10;
-        let cell_height = ((draw_area_size[1] as i32 / height) * 6) / 10;
+        ui.window("Video")
+            .size([gui_state.video_window_size[0] as f32, gui_state.video_window_size[1] as f32], Condition::Once)
+            .build(|| {
+                let draw_area_size = ui.window_size();
+                let draw_offset = ui.window_pos();
+                // now lets move the draw_offset by 0,20 to get it off the window title bar
+                let draw_offset = [draw_offset[0], draw_offset[1] + 20.0];
+                // and reduce the draw area size by the same values. {}
+                let draw_area_size = [draw_area_size[0], draw_area_size[1] - 20.0];
+                //  println!("DRAW_AREA_SIZE = {}x{}", draw_area_size[0], draw_area_size[1]);
+                let cell_width = ((draw_area_size[0] as i32 / width));
+                let cell_height = ((draw_area_size[1] as i32 / height));
 
-        let origin = ui.cursor_pos();
-        let fg = ui.get_foreground_draw_list();
-        if system_to_control.video_memory.is_highres() {
-            // ui.text("High Def Video here");
-            for current_row in 0..=height {
-                let y_offset = origin[1] as i32 + (current_row * cell_height);
-                for current_column in 0..=width {
-                    let x_offset = origin[0] as i32 + (current_column * cell_width);
-                    let current_origin = [x_offset as f32, y_offset as f32];
-                    let current_limit = [
-                        (x_offset + cell_width) as f32,
-                        (y_offset + cell_height) as f32,
-                    ];
-                    let memory_offset = (current_row * width + current_column) as u16;
-                    let to_render = system_to_control.video_memory.peek(memory_offset);
-                    let color: ImColor32 = if to_render {
-                        gui_state.on_colour
-                    } else {
-                        gui_state.off_colour
-                    };
-                    fg.add_rect_filled_multicolor(
-                        current_origin,
-                        current_limit,
-                        color,
-                        color,
-                        color,
-                        color,
-                    );
+                let origin = draw_offset;
+                let fg = ui.get_foreground_draw_list();
+                for current_row in 0..height {
+                    let y_offset = origin[1] as i32 + (current_row * cell_height);
+                    for current_column in 0..width {
+                        let x_offset = origin[0] as i32 + (current_column * cell_width);
+                        let current_origin = [x_offset as f32, y_offset as f32];
+                        let current_limit = [
+                            (x_offset + cell_width) as f32,
+                            (y_offset + cell_height) as f32,
+                        ];
+                        let memory_offset = (current_row * width + current_column) as u16;
+                        let to_render = system_to_control.video_memory.peek(memory_offset);
+                        let color: ImColor32 = if to_render {
+                            gui_state.on_colour
+                        } else {
+                            gui_state.off_colour
+                        };
+                        fg.add_rect_filled_multicolor(
+                            current_origin,
+                            current_limit,
+                            color,
+                            color,
+                            color,
+                            color,
+                        );
+                    }
+                }
+            }).expect("cant draw the video i guess");
+    }
+
+    pub fn quirks_picker(system: &mut Chip8ComputerManager,
+                         ui: &Ui) {
+        let selectors = [Chip8, SChipModern, XOChip];
+        for current_selector in selectors {
+            let mut working_selector =
+                ui.selectable_config(current_selector.clone().to_string());
+            match system.quirks_mode() {
+                Chip8 => {
+                    working_selector = working_selector.selected(true);
+                }
+                SChipModern => {
+                    working_selector = working_selector.selected(true);
+                }
+                XOChip => {
+                    working_selector = working_selector.selected(true);
                 }
             }
-        } else {
-            for current_row in 0..height {
-                let y_offset = origin[1] as i32 + (current_row * cell_height);
-                for current_column in 0..width {
-                    let x_offset = origin[0] as i32 + (current_column * cell_width);
-                    let current_origin = [x_offset as f32, y_offset as f32];
-                    let current_limit = [
-                        (x_offset + cell_width) as f32,
-                        (y_offset + cell_height) as f32,
-                    ];
-                    let memory_offset = (current_row * width + current_column) as u16;
-                    let to_render = system_to_control.video_memory.peek(memory_offset);
-                    let color: ImColor32 = if to_render {
-                        gui_state.on_colour
-                    } else {
-                        gui_state.off_colour
-                    };
-                    fg.add_rect_filled_multicolor(
-                        current_origin,
-                        current_limit,
-                        color,
-                        color,
-                        color,
-                        color,
+            if working_selector.build() {
+                system.reset(current_selector);
+                println!("CLICK ON {}", &current_selector);
+            }
+        }
+    }
+
+
+    fn control_pickers(
+        system: &mut Chip8ComputerManager,
+        gui_state: &mut ImGuiUiState,
+        ui: &Ui,
+    ) {
+        if CollapsingHeader::new("Controls").build(ui) {
+            // if the system has no program loaded hide the buttons.
+            let bytes: [u8; 2] = [
+                system.state().memory.peek(0x200),
+                system.state().memory.peek(0x201),
+            ];
+            let show_buttons = true; // bytes[0] != 0 || bytes[1] == 0xe0;
+
+            if show_buttons {
+                if ui.button("Step") {
+                    system.step();
+                };
+                ui.same_line();
+                if ui.button("Run") {
+                    system.start();
+                }
+            }
+            ui.same_line();
+            if ui.button("Stop") {
+                system.stop();
+            }
+            ui.same_line();
+            if ui.button("Reset") {
+                system.reset(system.quirks_mode());
+            }
+            if ui.button("Dump Video Memory") {
+                println!("{}", system.dump_to_string(Video));
+            }
+            ui.same_line();
+            if ui.button("Dump Keypad State") {
+                println!("{}", system.dump_to_string(Keyboard));
+            }
+            ui.same_line();
+            if ui.button("Dump Registers") {
+                println!("{}", system.dump_to_string(Registers));
+            }
+        }
+    }
+
+    fn system_summary(
+        system: &Chip8ComputerManager,
+        ui: &Ui,
+    ) {
+        /* System Step Counter */
+        ui.text(format!("Step {:04x}", system.num_cycles()).as_str());
+        ui.text(format!("Mode {}", system.quirks_mode()));
+    }
+
+    fn rom_lister(
+        system: &mut Chip8ComputerManager,
+        gui_state: &mut ImGuiUiState,
+        ui: &Ui,
+    ) {
+        /* ROM Lister */
+        if CollapsingHeader::new("Roms").build(ui) {
+            let new_filename = GuiFileList::display_path(
+                gui_state.roms_root_path.clone(),
+                &gui_state.filename_to_load,
+                ui,
+            );
+            if !new_filename.is_empty() {
+                if new_filename != gui_state.filename_to_load {
+                    debug!("NEW FILENAME SELECTED -> {new_filename}");
+                    gui_state.filename_to_load = new_filename;
+                }
+                if ui.button("Load Program") {
+                    let mut buffer: Vec<u8> = Vec::new();
+                    let full_name = format!(
+                        "{}/{}",
+                        gui_state
+                            .roms_root_path
+                            .clone()
+                            .as_os_str()
+                            .to_string_lossy(),
+                        gui_state.filename_to_load.to_string()
                     );
+                    debug!("PREPARING TO LOAD {}", full_name);
+
+                    let input_file = File::open(Path::new(&full_name));
+                    input_file
+                        .unwrap()
+                        .read_to_end(&mut buffer)
+                        .expect("Unable to read rom.");
+                    system.load_new_program_to_system_memory(buffer);
                 }
             }
         }
     }
+
+    fn display_options(
+        gui_state: &mut ImGuiUiState,
+        ui: &Ui,
+    ) {
+        if CollapsingHeader::new("Options").build(ui) {
+            ui.checkbox("Show Memory", &mut gui_state.show_memory);
+            ui.same_line();
+            ui.checkbox("Show Video", &mut gui_state.show_video);
+            ui.same_line();
+            ui.checkbox("Show Registers", &mut gui_state.show_registers);
+            ui.same_line();
+            ui.checkbox("Show Keypad", &mut gui_state.show_keypad);
+            ui.input_int("Target IPS", &mut gui_state.target_ips)
+                .build();
+        };
+    }
+
     pub fn system_controls(
         system_to_control: &mut Chip8ComputerManager,
         gui_state: &mut ImGuiUiState,
@@ -116,114 +234,15 @@ impl GemmaImguiSupport {
         ui.window("!!!! CONTROLS !!!!")
             .position([100.0, 640.0], Condition::FirstUseEver)
             .build(|| {
-                /* System Step Counter */
-                ui.text(format!("Step {:04x}", system_to_control.num_cycles()).as_str());
-                ui.text(format!("Mode {}", system_to_control.quirks_mode()));
-                /* ROM Lister */
-                if CollapsingHeader::new("Roms").build(ui) {
-                    let new_filename = GuiFileList::display_path(
-                        gui_state.roms_root_path.clone(),
-                        &gui_state.filename_to_load,
-                        ui,
-                    );
-                    if !new_filename.is_empty() {
-                        if new_filename != gui_state.filename_to_load {
-                            debug!("NEW FILENAME SELECTED -> {new_filename}");
-                            gui_state.filename_to_load = new_filename;
-                        }
-                        if ui.button("Load Program") {
-                            let mut buffer: Vec<u8> = Vec::new();
-                            let full_name = format!(
-                                "{}/{}",
-                                gui_state
-                                    .roms_root_path
-                                    .clone()
-                                    .as_os_str()
-                                    .to_string_lossy(),
-                                gui_state.filename_to_load.to_string()
-                            );
-                            debug!("PREPARING TO LOAD {}", full_name);
+                GemmaImguiSupport::system_summary(system_to_control, ui);
 
-                            let input_file = File::open(Path::new(&full_name));
-                            input_file
-                                .unwrap()
-                                .read_to_end(&mut buffer)
-                                .expect("Unable to read rom.");
-                            system_to_control.load_new_program_to_system_memory(buffer);
-                        }
-                    }
-                }
+                GemmaImguiSupport::rom_lister(system_to_control, gui_state, ui);
 
-                if CollapsingHeader::new("Controls").build(ui) {
-                    // if the system has no program loaded hide the buttons.
-                    let bytes: [u8; 2] = [
-                        system_to_control.state().memory.peek(0x200),
-                        system_to_control.state().memory.peek(0x201),
-                    ];
-                    let show_buttons = bytes[0] != 0 || bytes[1] == 0xe0;
+                GemmaImguiSupport::control_pickers(system_to_control, gui_state, ui);
 
-                    if show_buttons {
-                        if ui.button("Step") {
-                            system_to_control.step();
-                        };
-                        ui.same_line();
-                        if ui.button("Run") {
-                            system_to_control.start();
-                        }
-                    }
-                    ui.same_line();
-                    if ui.button("Stop") {
-                        system_to_control.stop();
-                    }
-                    ui.same_line();
-                    if ui.button("Reset") {
-                        system_to_control.reset(system_to_control.quirks_mode());
-                    }
-                    if ui.button("Dump Video Memory") {
-                        println!("{}", system_to_control.dump_to_string(Video));
-                    }
-                    ui.same_line();
-                    if ui.button("Dump Keypad State") {
-                        debug!("{}", system_to_control.dump_to_string(Keyboard));
-                    }
-                    ui.same_line();
-                    if ui.button("Dump Registers") {
-                        debug!("{}", system_to_control.dump_to_string(Registers));
-                    }
-                }
+                GemmaImguiSupport::display_options(gui_state, ui);
 
-                if CollapsingHeader::new("Options").build(ui) {
-                    ui.checkbox("Show Memory", &mut gui_state.show_memory);
-                    ui.same_line();
-                    ui.checkbox("Show Video", &mut gui_state.show_video);
-                    ui.same_line();
-                    ui.checkbox("Show Registers", &mut gui_state.show_registers);
-                    ui.same_line();
-                    ui.checkbox("Show Keypad", &mut gui_state.show_keypad);
-                    ui.input_int("Target IPS", &mut gui_state.target_ips)
-                        .build();
-                };
-
-                let selectors = [Chip8, SChipModern, XOChip];
-                for current_selector in selectors {
-                    let mut working_selector =
-                        ui.selectable_config(current_selector.clone().to_string());
-                    match system_to_control.quirks_mode() {
-                        Chip8 => {
-                            working_selector = working_selector.selected(true);
-                        }
-                        SChipModern => {
-                            working_selector = working_selector.selected(true);
-                        }
-                        XOChip => {
-                            working_selector = working_selector.selected(true);
-                        }
-                    }
-                    if working_selector.build() {
-                        system_to_control.reset(current_selector);
-                        println!("CLICK ON {}", &current_selector);
-                    }
-                }
+                GemmaImguiSupport::quirks_picker(system_to_control, ui);
             });
     }
 
@@ -232,7 +251,7 @@ impl GemmaImguiSupport {
             .position([100.0, 640.0], Condition::FirstUseEver)
             .build(|| {
                 ui.text("Registers");
-                for i in 1..0x10 {
+                for i in 0..0x10 {
                     ui.text(format!("V{:X}: {}", i, system.registers.peek(i)));
                     if i != 7 {
                         ui.same_line();
diff --git a/gemmaimgui/src/bin/support/gui_file_list.rs b/gemmaimgui/src/bin/support/gui_file_list.rs
index 666c85e..a6054d1 100644
--- a/gemmaimgui/src/bin/support/gui_file_list.rs
+++ b/gemmaimgui/src/bin/support/gui_file_list.rs
@@ -1,7 +1,7 @@
 use std::ffi::OsString;
 use std::fs::read_dir;
 use std::path::PathBuf;
-use imgui::Ui;
+use imgui::{ChildWindow, Ui};
 use log::debug;
 
 pub struct GuiFileList {}
@@ -20,16 +20,22 @@ impl GuiFileList {
 
         known_files.sort();
 
-        for (index, entry) in known_files.iter().enumerate() {
-            let mut working_select = ui.selectable_config(entry.clone().into_string().unwrap().to_string());
-            if *entry.to_str().unwrap() == *selected_filename.as_str() {
-                working_select = working_select.selected(true);
-            }
-            if working_select.build() {
-                debug!("SELECTED {index} / {entry:?}");
-                working_filename = entry.clone().into_string().unwrap();
-            };
-        }
+        ui.child_window("Item List")
+            .size([0.0, 200.0])
+            .border(false)
+            .build(|| {
+                for (index, entry) in known_files.iter().enumerate() {
+                    let mut working_select = ui.selectable_config(entry.clone().into_string().unwrap().to_string());
+                    if *entry.to_str().unwrap() == *selected_filename.as_str() {
+                        working_select = working_select.selected(true);
+                    }
+                    if working_select.build() {
+                        debug!("SELECTED {index} / {entry:?}");
+                        working_filename = entry.clone().into_string().unwrap();
+                    };
+                }
+            });
+
         working_filename
     }
 }
diff --git a/gemmaimgui/src/bin/support/mod.rs b/gemmaimgui/src/bin/support/mod.rs
index d0ee045..0a39bbf 100644
--- a/gemmaimgui/src/bin/support/mod.rs
+++ b/gemmaimgui/src/bin/support/mod.rs
@@ -179,7 +179,7 @@ pub fn create_context() -> imgui::Context {
             }),
         },
     ]);
-    imgui.set_ini_filename(None);
+//    imgui.set_ini_filename(None);
 
     imgui
 }
diff --git a/gemmaimgui/src/bin/support/ui_state.rs b/gemmaimgui/src/bin/support/ui_state.rs
index e36219d..725e391 100644
--- a/gemmaimgui/src/bin/support/ui_state.rs
+++ b/gemmaimgui/src/bin/support/ui_state.rs
@@ -16,7 +16,9 @@ pub struct ImGuiUiState {
     pub frame_time: u32,
     pub last_frame_instant: Instant,
     pub target_ips: i32,
-    pub roms_root_path: PathBuf
+    pub roms_root_path: PathBuf,
+    pub video_window_size: [i32; 2],
+    pub control_window_size: [i32; 2]
 }
 
 impl Clone for ImGuiUiState {
@@ -33,7 +35,9 @@ impl Clone for ImGuiUiState {
             frame_time: self.frame_time,
             last_frame_instant: self.last_frame_instant,
             target_ips: self.target_ips,
-            roms_root_path: self.roms_root_path.to_owned()
+            roms_root_path: self.roms_root_path.to_owned(),
+            video_window_size: self.video_window_size,
+            control_window_size: self.control_window_size
         }
     }
 }
@@ -51,8 +55,10 @@ impl Default for ImGuiUiState {
             is_running: false,
             frame_time: 16,
             last_frame_instant: Instant::now(),
-            target_ips: 200000,
-            roms_root_path: PathBuf::from(ROMPATH_DEFAULT)
+            target_ips: 20,
+            roms_root_path: PathBuf::from(ROMPATH_DEFAULT),
+            control_window_size: [200, 600],
+            video_window_size: [800, 600]
         }
     }
 }
diff --git a/gemmautil/Cargo.toml b/gemmautil/Cargo.toml
deleted file mode 100644
index 18d723b..0000000
--- a/gemmautil/Cargo.toml
+++ /dev/null
@@ -1,10 +0,0 @@
-[package]
-name = "gemmautil"
-version = "0.1.0"
-edition = "2021"
-
-[dependencies]
-gemma = { path = "../gemma" }
-clap.workspace = true
-pest = "2.7.14"
-pest_derive = "2.7.14"
diff --git a/resources/custom/002-schip-scroll-tests.ch8 b/resources/custom/002-schip-scroll-tests.ch8
index a9f978fd17f55ffb62bb29a64de0e1ddc1547dfd..c8667491f6a681d2c83098498260893352fabe08 100644
GIT binary patch
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diff --git a/resources/custom/sinusoid_schip.ch8 b/resources/custom/sinusoid_schip.ch8
new file mode 100644
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diff --git a/resources/roms/gradsim.ch8 b/resources/roms/gradsim.ch8
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GIT binary patch
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diff --git a/resources/roms/octo-default.ch8 b/resources/roms/octo-default.ch8
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GIT binary patch
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diff --git a/resources/roms/sinusoid_schip.ch8 b/resources/roms/sinusoid_schip.ch8
new file mode 100644
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GIT binary patch
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diff --git a/resources/roms/vertical_clip.ch8 b/resources/roms/vertical_clip.ch8
new file mode 100644
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GIT binary patch
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diff --git a/resources/test/state/computer_001_system_zero_state.tct b/resources/test/state/computer_001_system_zero_state.tct
new file mode 100644
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GIT binary patch
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diff --git a/resources/test/state/smoke_001_round_trip_serialize_deserialize.json b/resources/test/state/smoke_001_round_trip_serialize_deserialize.json
index 8b582f5..406a858 100644
--- a/resources/test/state/smoke_001_round_trip_serialize_deserialize.json
+++ b/resources/test/state/smoke_001_round_trip_serialize_deserialize.json
@@ -1 +1 @@
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diff --git a/resources/test/state/smoke_002_round_trip_serialize_deserialize_compressed.tflt b/resources/test/state/smoke_002_round_trip_serialize_deserialize_compressed.tflt
deleted file mode 100644
index affadaf..0000000
--- a/resources/test/state/smoke_002_round_trip_serialize_deserialize_compressed.tflt
+++ /dev/null
@@ -1 +0,0 @@
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\ No newline at end of file
diff --git a/resources/test/state/video_lowres_schip_draw_chip8_sprite_result.json b/resources/test/state/video_lowres_schip_draw_chip8_sprite_result.json
deleted file mode 100644
index e69de29..0000000