Add utility binaries for disassembly and screenshot viewing

src/bin/chirp-disasm.rs

@@ -0,0 +1,40 @@
+use chirp::{error::Result, prelude::*};
+use gumdrop::*;
+use std::{fs::read, path::PathBuf};
+use owo_colors::OwoColorize;
+
+#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Options, Hash)]
+struct Arguments {
+    #[options(help = "Show help text")]
+    help: bool,
+    #[options(help = "Load a ROM to run on Chirp", free, required)]
+    pub file: PathBuf,
+    #[options(help = "Load address (usually 200)", parse(try_from_str = "parse_hex"))]
+    pub loadaddr: u16,
+    #[options(help = "Start disassembling at offset...")]
+    pub offset: usize,
+}
+
+fn parse_hex(value: &str) -> std::result::Result<u16, std::num::ParseIntError> {
+    u16::from_str_radix(value, 16)
+}
+
+fn main() -> Result<()> {
+    let options = Arguments::parse_args_default_or_exit();
+    let contents = &read(&options.file)?;
+    let disassembler = Disassemble::default();
+    for (addr, insn) in contents[options.offset..].chunks_exact(2).enumerate() {
+        let insn = u16::from_be_bytes(
+            insn.try_into()
+                .expect("Iterated over 2-byte chunks, got <2 bytes"),
+        );
+        println!(
+            "{:03x}: {} {:04x}",
+            2 * addr + 0x200 + options.offset,
+            disassembler.instruction(insn),
+            insn.bright_black(),
+
+        );
+    }
+    Ok(())
+}

src/bin/chirp-shot-viewer.rs

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+use chirp::{error::Result, prelude::*};
+use std::{env::args, fs::read};
+
+fn main() -> Result<()> {
+    bus! {Screen [0..0x100] = &read(args().nth(1).unwrap_or("screen_dump.bin".to_string()))?}
+        .print_screen()
+}