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use crate::*;
pub struct SystemDevice {
/// Name and version of this system.
pub name: ReadBuffer,
/// Authors of this system.
pub authors: ReadBuffer,
/// Mask of all devices waiting to wake from sleep.
pub wakers: u16,
/// Device that most recently woke the system.
pub waker: u8,
/// True if the system has been put to sleep.
pub asleep: bool,
/// Mask of all available devices.
pub devices: u16,
/// Name of the first custom devices.
pub custom1: ReadBuffer,
/// Name of the second custom devices.
pub custom2: ReadBuffer,
/// Name of the third custom devices.
pub custom3: ReadBuffer,
/// Name of the fourth custom devices.
pub custom4: ReadBuffer,
}
impl Device for SystemDevice {
fn read(&mut self, port: u8) -> u8 {
match port {
0x0 => 0x00,
0x1 => 0x00,
0x2 => self.waker,
0x3 => 0x00,
0x4 => 0x00,
0x5 => 0x00,
0x6 => 0x00,
0x7 => 0x00,
0x8 => self.name.read(),
0x9 => self.authors.read(),
0xa => 0x00,
0xb => 0x00,
0xc => 0x00,
0xd => 0x00,
0xe => read_h!(self.devices),
0xf => read_l!(self.devices),
_ => unreachable!(),
}
}
fn write(&mut self, port: u8, value: u8) -> Option<Signal> {
match port {
0x0 => write_h!(self.wakers, value),
0x1 => { write_l!(self.wakers, value);
self.asleep = true;
return Some(Signal::Sleep); },
0x2 => (),
0x3 => return Some(Signal::Fork),
0x4 => (),
0x5 => (),
0x6 => (),
0x7 => (),
0x8 => self.name.pointer = 0,
0x9 => self.authors.pointer = 0,
0xa => (),
0xb => (),
0xc => (),
0xd => (),
0xe => (),
0xf => (),
_ => unreachable!(),
};
return None;
}
fn wake(&mut self) -> bool {
false
}
}
impl SystemDevice {
pub fn new(devices: u16) -> Self {
Self {
name: get_name(),
authors: get_authors(),
wakers: 0,
waker: 0,
asleep: false,
devices,
custom1: ReadBuffer::new(),
custom2: ReadBuffer::new(),
custom3: ReadBuffer::new(),
custom4: ReadBuffer::new(),
}
}
}
fn get_name() -> ReadBuffer {
let pkg_version = env!("CARGO_PKG_VERSION");
let pkg_name = env!("CARGO_PKG_NAME");
ReadBuffer::from_str(&format!("{pkg_name}/{pkg_version}"))
}
fn get_authors() -> ReadBuffer {
let pkg_authors = env!("CARGO_PKG_AUTHORS");
let mut authors_string = String::new();
for author in pkg_authors.split(':') {
authors_string.push_str(author);
authors_string.push('\n');
}
ReadBuffer::from_str(&authors_string)
}
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