dnutiu/chip8-rust
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execute 7 instructions per frame

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This commit is contained in:
Denis-Cosmin Nutiu 2024-12-08 18:00:52 +02:00
parent afe5ed835e
commit b447f0ccee
1 changed files with 13 additions and 8 deletions
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21
src/emulator.rs
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@ -8,7 +8,8 @@ use rand::Rng;
use std::fs::File;
use std::io::Read;
use std::path::Path;
use std::time::Instant;
use std::thread::sleep;
use std::time::{Duration, Instant};
/// Represents the display's width in pixels.
const DISPLAY_WIDTH: usize = 64;
@ -126,15 +127,20 @@ where
let now = Instant::now();
let elapsed_time = now.duration_since(tick_timer);
let elapsed_seconds = elapsed_time.as_secs_f32();
if elapsed_seconds >= 1.0 / target_fps {
// fetch instruction & decode it
let instruction = self.fetch_instruction()?;
self.program_counter += 2;
if elapsed_seconds >= (1.0 / target_fps) {
for _ in 0..=7 {
// fetch instruction & decode it
let instruction = self.fetch_instruction()?;
self.program_counter += 2;
// execute
self.execute_instruction(instruction)?;
// execute
self.execute_instruction(instruction)?;
}
tick_timer = Instant::now();
} else {
sleep(Duration::from_millis(1));
}
}
}
@ -223,7 +229,6 @@ where
} else {
self.registers[0xF] = 0;
}
self.display.render(&self.display_data);
}
ProcessorInstruction::Return => {