First commit

.gitignore

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+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "bitsplit"
+version = "0.1.0"

Cargo.toml

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+[package]
+name = "bitsplit"
+version = "0.1.0"
+authors = ["Stephen <webmaster@scd31.com>"]
+edition = "2018"
+description = "A program that splits an input file into 2 files, where the lower/even bytes end up in one file and the upper/odd bytes end up in another. Useful for programming systems with a 16-bit data bus width that consists of 2 8-bit ROMs."
+repository = "https://git.scd31.com/stephen/bitsplit"
+license = "MIT"
+readme = "README.md"
+
+[dependencies]

README.md

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+# bitsplit
+
+A program that splits an input file into 2 files, where the lower/even bytes end up in one file and the upper/odd bytes end up in another. Useful for programming systems with a 16-bit data bus width that consists of 2 8-bit ROMs.
+
+Written for use with my 68000 single board computer.

rustfmt.toml

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+tab_spaces = 4
+hard_tabs = true

src/main.rs

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+use std::env;
+use std::fs;
+use std::io::Write;
+
+fn main() {
+	let args: Vec<String> = env::args().collect();
+
+	if args.len() != 4 {
+		eprintln!(
+			"Usage: {} in_file lower_bytes_out higher_bytes_out",
+			args[0]
+		);
+		return;
+	}
+
+	// Read in binary file
+	let original_bytes = fs::read(&args[1]).expect("Could not read input file");
+
+	let mut lower_bytes = Vec::new();
+	let mut upper_bytes = Vec::new();
+
+	for i in 0..original_bytes.len() {
+		if i % 2 == 0 {
+			lower_bytes.push(original_bytes[i]);
+		} else {
+			upper_bytes.push(original_bytes[i]);
+		}
+	}
+
+	let mut lower_file = fs::File::create(&args[2]).expect("Could not create lower bytes file");
+	lower_file
+		.write_all(&lower_bytes)
+		.expect("Could not write lower bytes file");
+
+	let mut upper_file = fs::File::create(&args[3]).expect("Could not create upper bytes file");
+	upper_file
+		.write_all(&upper_bytes)
+		.expect("Could not write upper bytes file");
+}