beneater/src/bin/make_rom.rs

@@ -21,34 +21,24 @@ fn main() {
     // Fill with 0xea -> NOP
     let mut vec: [u8; SIZE_32KB] = [ISA_OP_NOP; SIZE_32KB];
 
-    // Load to A
     vec[0] = ISA_OP_LDA_I; // LDA #$ab
     vec[1] = 0b1010_1011; //      1010 1011
-    // Jump to rotate cycle
     vec[2] = 0x02; // --
     vec[3] = 0x03; // --
 
-    // Jump to Main
-    vec[0x2210] = ISA_OP_JMP_ABS;
-    vec[0x2211] = 0x00;
-    vec[0x2212] = 0x40;
-
-    // load to a
     vec[0x4000] = ISA_OP_LDA_I;
     vec[0x4001] = 0b0101_0100;
-    // jump to top of load to a
     vec[0x4002] = ISA_OP_JMP_ABS;
     vec[0x4003] = 0x00;
     vec[0x4004] = 0x40;
     vec[0x4005] = ISA_OP_NOP;
 
-    vec[0x7ffa] = 0x22; // NMI Vector
-    vec[0x7ffb] = 0x11;
     vec[0x7ffc] = 0x12; // Reset Vector
     vec[0x7ffd] = 0x34;
     vec[0x7ffe] = 0x43; // Interrupt Vector
     vec[0x7fff] = 0x21;
 
+
     vec = le_swap(&vec);
 
     // write the rom to disk

cli/src/bin/de6502.rs

@@ -1,154 +0,0 @@
-use std::collections::HashMap;
-use std::fs;
-use std::fs::File;
-use std::path::PathBuf;
-use std::thread::current;
-use core::constants::constants_system::*;
-use core::constants::constants_isa_op::*;
-use clap::{Parser, Subcommand};
-use core::instruction_table::INSTRUCTION_TABLE;
-use std::io::Write;
-
-#[derive(Parser)]
-#[command(version, about, long_about = None)]
-struct CliOptions {
-    /// File to Decompile
-    input: PathBuf,
-    /// File to write
-    output: PathBuf
-}
-
-#[derive(Debug)]
-struct DecompiledLine {
-    offset: u16,
-    text: String,
-    label: Option<String>,
-    bytes: Vec<u8>
-}
-
-impl DecompiledLine {
-    /// is_jump
-    ///
-    /// Check if the current line is a type of a jump
-    pub fn is_jump(&self) -> bool {
-        self.bytes[0] == ISA_OP_JMP_ABS || self.bytes[0] == ISA_OP_JMP_IND
-    }
-
-    /// is_branch
-    ///
-    /// Check if the current line is a branch
-    pub fn is_branch(&self) -> bool {
-        self.bytes[0] == ISA_OP_BCC || self.bytes[0] == ISA_OP_BCS ||
-            self.bytes[0] == ISA_OP_BEQ || self.bytes[0] == ISA_OP_BMI ||
-            self.bytes[0] == ISA_OP_BNE || self.bytes[0] == ISA_OP_BPL ||
-            self.bytes[0] == ISA_OP_BVS || self.bytes[0] == ISA_OP_BVC
-    }
-}
-
-/// WorkingProgram
-///
-/// Where we keep the program being decompiled
-struct WorkingProgram {
-    data: [u8; SIZE_64KB],
-    lines: Vec<DecompiledLine>
-}
-
-impl WorkingProgram {
-
-}
-
-fn decompile(data: &[u8]) -> Vec<(u16, DecompiledLine)> {
-    println!("Preparing to decompile {}b", data.len());
-    let mut current_data_position: u16 = 0;
-    let mut lines: HashMap<u16, DecompiledLine> = HashMap::new();
-
-    while current_data_position < data.len() as u16 {
-        // read the next byte.
-        let next_byte = data[current_data_position as usize];
-        let mut bytes = vec![next_byte];
-        let target_op = INSTRUCTION_TABLE[next_byte as usize].clone();
-
-        if let Some(top) = target_op {
-            // println!("Instruction {:?}/{:?} needs {:?} bytes.", top.operation, top.mode, top.length);
-
-            let num_bytes_to_load = top.length - 1;
-            println!("Need {num_bytes_to_load} more bytes.");
-            let mut formatted_asm =  String::from(top.format_prefix);
-            let mut param = None;
-            if num_bytes_to_load == 1 {
-                bytes.push(data[current_data_position as usize + 1]);
-                formatted_asm = format!("{}{:02x}{}", formatted_asm, bytes[1], top.format_postfix);
-            };
-
-            if num_bytes_to_load == 2 {
-                bytes.push(data[current_data_position as usize + 1]);
-                bytes.push(data[current_data_position as usize + 2]);
-                 // 16 bit parameter.
-                param = Some(((bytes[2] as u16) << 8) | bytes[1] as u16);
-                formatted_asm = format!("{}{:04x}{}", formatted_asm, param.unwrap(), top.format_postfix);
-            };
-
-            // figure out how long the instruction is and read that much more data
-            lines.insert(current_data_position, DecompiledLine {
-                offset: current_data_position,
-                text: String::from(formatted_asm),
-                label: None,
-                bytes,
-            });
-
-            current_data_position = current_data_position + top.length as u16;
-        } else {
-            // invalid instruction
-            println!("Byte sequence 0x{} invalid.", next_byte);
-            current_data_position += 1;
-        }
-    }
-
-    println!("Found {} instructions in pass 1.  Adding labels for jumps.", lines.len());
-
-   //let targets = vec![];
-
-    for (index, line) in &lines {
-
-        if line.bytes[0] == ISA_OP_JMP_ABS {
-            // println!("ABS JUMP FOUND");
-        }
-    }
-
-    let mut items: Vec<_> = lines.into_iter().collect();
-    items.sort_by(|a, b| a.0.cmp(&b.0));
-
-
-    // loop through the lines for JSR and label the 'target' as SUB<index>
-
-    // check the vectors to label those entrypoints.
-    // -> main
-    // -> NMI
-    // -> IRQ
-
-    items
-}
-
-fn main() {
-    let opts = CliOptions::parse();
-    println!("Taxation is theft.");
-
-    // Load program to an array...
-    let data = vec![
-        0xa9, 0xab, 0x4c, 0x00, 0x40, 0xa9, 0x54, 0x4c, 0x00, 0x40,
-        ISA_OP_TYA, ISA_OP_TXA, ISA_OP_TSX
-    ];
-
-    let loaded_data = fs::read(opts.input).unwrap();
-    println!("Loaded {}b", loaded_data.len());
-    // ...load the array to the WorkingProgram structure...
-    let result = decompile(&loaded_data);
-    let mut output_file = File::create(opts.output).unwrap();
-
-    // ...reap the decompiled code.
-    for (_, line) in &result {
-        let line =format!("{:width$}; {:?}", line.text,line.bytes, width=30 );
-        println!("{}", line);
-        writeln!(output_file, "{}", line).expect("cant write output file.  you picked the red snapper.");
-    }
-}

cli/src/bin/disasm.rs

@@ -0,0 +1,5 @@
+fn main() {
+    println!("Taxation is theft.");
+    println!("TODO:");
+    println!(" Load specified binary and parse it out to ASM");
+}

core/src/instruction.rs

@@ -19,7 +19,7 @@ impl Instruction {
     pub fn opinfo(bytes: &[u8]) -> Option<OpInfo> {
         trace!("DECODING : {bytes:?}");
         let opcode = bytes.get(0).copied()?;
-        Some(INSTRUCTION_TABLE[opcode as usize].clone())?
+        Some(INSTRUCTION_TABLE[opcode as usize])?
     }
 
     pub fn decode(bytes: &[u8]) -> Option<Instruction> {

core/src/mos6502cpu/cpu.rs

@@ -67,7 +67,7 @@ impl Default for Mos6502Cpu {
                 mode: AddressMode::Implied,
                 operand: Operand::None,
             },
-            oi: INSTRUCTION_TABLE[ISA_OP_NOP as usize].clone().unwrap(),
+            oi: INSTRUCTION_TABLE[ISA_OP_NOP as usize].unwrap(),
             has_reset: false,
             iv: 0xfffe,
             cycle_carry: 0x0000,

core/src/op_info.rs

@@ -1,7 +1,7 @@
 use crate::address_mode::AddressMode;
 use crate::operation::Operation;
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Copy, Clone)]
 pub struct OpInfo {
     /// What is the operation
     pub operation: Operation,
@@ -11,7 +11,4 @@ pub struct OpInfo {
     pub length: u8,
     /// CPU Cycles to complete the instruction
     pub cycles: u8,
-    /// Format string for disassembly
+}
-    pub format_prefix: &'static str,
-    pub format_postfix: &'static str
-}

resources/beneater/README

@@ -1,3 +0,0 @@
-To Build
-
-64tass -a -b -o <your_bin> <your_asm>

resources/beneater/asm/lda_loop.asm

@@ -1,26 +0,0 @@
-    * = $A000
-    .fill Reset - *, $ea
-Reset:
-    SEI
-    CLD
-    LDX #$FF
-    TXS
-    ; Drop to the start of our main loop
-MainLoop:
-    LDA #$AA
-    ROR
-    JMP MainLoop
-
-; What to do when we get a NMI
-NMI:
-    RTI
-
-; What do we get when we get an interrupt
-IRQ:
-    RTI
-
-; setup the requirements for the CPU
-    * = $FFF8
-    .word NMI
-    .word Reset
-    .word IRQ

resources/beneater/asm/skeleton.asm

@@ -1,22 +0,0 @@
-   * = $0000
-   .fill Reset - *, $ea
-
-Reset:
-   SEI
-   CLD
-   LDX #$FF
-   TXS
-
-MainLoop:
-   NOP
-   JMP MainLoop
-
-NMI:
-   RTI
-IRQ:
-   RTI
-
-   * = $FFF8
-   .word NMI
-   .word RESET
-   .word IRQ

resources/test/instructions.asm

@@ -1,17 +0,0 @@
-; Test of instructions for the decompiler
-;
-; This file is intended to be assembled and then
-; used as an input to a test that decompiles the
-; binary back to the text version of the instructions
-    ADC #$ab   ; ADC Immediate
-    ADC $ab    ; ADC ZeroPage
-    ADC $ab,X  ; ADC ZeroPageX
-    ADC $abcd  ; ADC Absolute
-    ADC $abcd,X; ADC AbsoluteX
-    ADC $abcd,Y; ADC AbsoluteY
-    ADC ($ab,X); ADC IndirectX
-    ADC ($ab),Y; ADC IndirectY
-
-    AND #$ab   ; AND Immediate
-    AND $ab    ; AND ZeroPage
-    AND $ab,X  ; AND ZeroPageX