Update readme and repl

Author: mlund

README.md

@@ -7,7 +7,8 @@
 
 `matrix65` is a CLI tool, for communicating with the [MEGA65](https://mega65.org/)
 8-bit retro computer using a serial connection.
-It has a mix of features from `m65`, `mega65ftp`, and `M65connect` and is written entirely in **Rust**.
+It has a mix of features from `m65`, `mega65_ftp`, and `M65connect` and is written entirely in **Rust**.
+Here is a short [demonstration video](https://www.youtube.com/watch?v=dUvXLtUUC-Y).
 
 _Disclaimer: This tool is still under development; use it at your own risk._
 
@@ -62,7 +63,10 @@ your involvement is very welcome.
 - [x] Send sequence of key-presses
 - [x] Reset MEGA65
 - [x] Peek into memory; hexdump, binary file dump
+- [x] Poke into memory; single value or from file
 - [x] Logging with e.g. `export RUST_LOG=info`
+- [x] REPL command interface (experimental)
+- [ ] Disassembly
 - [ ] Transfer and mount disk images
 - [ ] Load at arbitrary address and optionally start with `SYS`
 - [ ] Memory dumps in YAML format

src/repl.rs

@@ -1,4 +1,5 @@
 use crate::commands;
+use crate::serial;
 use reedline_repl_rs::clap::{ArgMatches, Command};
 use reedline_repl_rs::{Repl, Result};
 use serialport::SerialPort;
@@ -17,6 +18,7 @@ pub fn start_repl(port: &mut Box<dyn SerialPort>) -> Result<()> {
         .with_description(env!("CARGO_PKG_DESCRIPTION"))
         .with_banner("Welcome to matrix65!")
         .with_command(Command::new("reset").about("Reset MEGA65"), reset)
+        .with_command(Command::new("go64").about("Go to C64 mode"), go64)
         .with_command(
             Command::new("filehost").about("Start the filehost"),
             filehost,
@@ -34,6 +36,16 @@ fn reset(_args: ArgMatches, context: &mut Context) -> Result<Option<String>> {
     }
 }
 
+/// Wrap go64 command
+fn go64(_args: ArgMatches, context: &mut Context) -> Result<Option<String>> {
+    match serial::go64(context.port) {
+        Err(err) => Err(reedline_repl_rs::Error::IllegalDefaultError(
+            err.to_string(),
+        )),
+        Ok(()) => Ok(None),
+    }
+}
+
 /// Wrap filehost command
 fn filehost(_args: ArgMatches, context: &mut Context) -> Result<Option<String>> {
     match commands::filehost(context.port) {