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|
use crate::*;
pub struct DynamicEmulator {
pub br: BedrockEmulator<DynamicDeviceBus>,
pub debug: DebugState,
}
impl DynamicEmulator {
pub fn new(config: &EmulatorConfig, debug: bool) -> Self {
Self {
br: BedrockEmulator::new(DynamicDeviceBus::new(config)),
debug: DebugState::new(debug, config.symbols_path.as_ref()),
}
}
pub fn load_program(&mut self, bytecode: &[u8]) {
self.br.core.mem.load_program(bytecode);
}
pub fn run(&mut self) {
loop {
match self.br.evaluate(BATCH_SIZE, self.debug.enabled) {
Some(Signal::Fork) => {
self.br.core.mem.pc = 0;
self.br.core.wst.sp = 0;
self.br.core.rst.sp = 0;
}
Some(Signal::Sleep) => loop {
if self.br.dev.wake() { break; }
std::thread::sleep(MIN_TICK_DURATION);
}
Some(Signal::Halt) => {
self.br.dev.stream.flush();
info!("Program halted, exiting.");
self.debug.debug_summary(&self.br.core);
std::process::exit(0);
}
Some(Signal::Debug(Debug::Debug1)) => {
self.debug.debug_summary(&self.br.core);
}
_ => (),
}
if self.br.dev.input.accessed || self.br.dev.screen.accessed {
return;
}
}
}
pub fn to_graphical(self, config: EmulatorConfig) -> GraphicalEmulator {
GraphicalEmulator {
br: BedrockEmulator {
core: self.br.core,
dev: GraphicalDeviceBus {
system: self.br.dev.system,
memory: self.br.dev.memory,
math: self.br.dev.math,
clock: self.br.dev.clock,
input: self.br.dev.input,
screen: self.br.dev.screen,
stream: self.br.dev.stream,
file: self.br.dev.file,
}
},
debug: self.debug,
fullscreen: config.fullscreen,
scale: config.zoom.into(),
show_override_palette: config.override_palette.is_some(),
render_mark: Instant::now(),
config,
}
}
pub fn to_headless(self) -> HeadlessEmulator {
HeadlessEmulator {
br: BedrockEmulator {
core: self.br.core,
dev: HeadlessDeviceBus {
system: self.br.dev.system,
memory: self.br.dev.memory,
math: self.br.dev.math,
clock: self.br.dev.clock,
stream: self.br.dev.stream,
file: self.br.dev.file,
}
},
debug: self.debug,
}
}
}
pub struct DynamicDeviceBus {
pub system: SystemDevice,
pub memory: MemoryDevice,
pub math: MathDevice,
pub clock: ClockDevice,
pub input: InputDevice,
pub screen: ScreenDevice,
pub stream: StreamDevice,
pub file: FileDevice,
}
impl DynamicDeviceBus {
pub fn new(config: &EmulatorConfig) -> Self {
Self {
system: SystemDevice::new(0b1111_1100_1010_0000),
memory: MemoryDevice::new(),
math: MathDevice::new(),
clock: ClockDevice::new(),
input: InputDevice::new(),
screen: ScreenDevice::new(&config),
stream: StreamDevice::new(&config),
file: FileDevice::new(),
}
}
}
impl DeviceBus for DynamicDeviceBus {
fn read(&mut self, port: u8) -> u8 {
match port & 0xf0 {
0x00 => self.system.read(port & 0x0f),
0x10 => self.memory.read(port & 0x0f),
0x20 => self.math .read(port & 0x0f),
0x30 => self.clock .read(port & 0x0f),
0x40 => self.input .read(port & 0x0f),
0x50 => self.screen.read(port & 0x0f),
0x80 => self.stream.read(port & 0x0f),
0xa0 => self.file .read(port & 0x0f),
_ => 0
}
}
fn write(&mut self, port: u8, value: u8) -> Option<Signal> {
match port & 0xf0 {
0x00 => self.system.write(port & 0x0f, value),
0x10 => self.memory.write(port & 0x0f, value),
0x20 => self.math .write(port & 0x0f, value),
0x30 => self.clock .write(port & 0x0f, value),
0x40 => { self.input .write(port & 0x0f, value); Some(Signal::Interrupt) }
0x50 => { self.screen.write(port & 0x0f, value); Some(Signal::Interrupt) }
0x80 => self.stream.write(port & 0x0f, value),
0xa0 => self.file .write(port & 0x0f, value),
_ => None
}
}
fn wake(&mut self) -> bool {
macro_rules! rouse {
($id:expr, $dev:ident) => {
let is_eligible = test_bit!(self.system.wakers, 0x8000 >> $id);
if is_eligible && self.$dev.wake() {
self.system.waker = $id;
self.system.asleep = false;
return true;
}
};
}
rouse!(0xa, file );
rouse!(0x8, stream);
rouse!(0x5, screen);
rouse!(0x4, input );
rouse!(0x3, clock );
return false;
}
}
|
