From cbd7b7253573226cadebcf3ba0355aea0dbb7025 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jo=C3=A3o=20Magalh=C3=A3es?= <joamag@gmail.com>
Date: Sun, 19 Jun 2022 01:19:59 +0100
Subject: [PATCH] feat: more clock implementation
---
src/chip8_neo.rs | 22 +++++++++++++++++-----
1 file changed, 17 insertions(+), 5 deletions(-)
diff --git a/src/chip8_neo.rs b/src/chip8_neo.rs
index 8c9e62a..4aa5f8f 100644
--- a/src/chip8_neo.rs
+++ b/src/chip8_neo.rs
@@ -3,6 +3,7 @@ pub const DISPLAY_HEIGHT: usize = 32;
pub const RAM_SIZE: usize = 4096;
pub const STACK_SIZE: usize = 16;
pub const REGISTERS_SIZE: usize = 16;
+pub const KEYS_SIZE: usize = 16;
/// The starting address for the ROM loading, should be
/// the initial PC position for execution.
@@ -37,6 +38,7 @@ pub struct Chip8Neo {
sp: u8,
dt: u8,
st: u8,
+ keys: [bool; KEYS_SIZE],
}
#[cfg_attr(feature = "web", wasm_bindgen)]
@@ -53,6 +55,7 @@ impl Chip8Neo {
sp: 0x0,
dt: 0x0,
st: 0x0,
+ keys: [false; KEYS_SIZE],
};
chip8.load_default_font();
chip8
@@ -67,6 +70,7 @@ impl Chip8Neo {
self.sp = 0x0;
self.dt = 0x0;
self.st = 0x0;
+ self.keys = [false; KEYS_SIZE];
self.load_default_font();
}
@@ -178,20 +182,28 @@ impl Chip8Neo {
}
}
- pub fn clock_dt(&mut self) {}
+ pub fn clock_dt(&mut self) {
+ self.dt = self.dt.saturating_sub(1)
+ }
- pub fn clock_st(&mut self) {}
+ pub fn clock_st(&mut self) {
+ self.st = self.st.saturating_sub(1)
+ }
- pub fn key_press(&mut self, key: u8) {}
+ pub fn key_press(&mut self, key: u8) {
+ self.keys[key as usize] = true;
+ }
- pub fn key_lift(&mut self, key: u8) {}
+ pub fn key_lift(&mut self, key: u8) {
+ self.keys[key as usize] = false;
+ }
pub fn load_rom(&mut self, rom: &[u8]) {
self.ram[ROM_START..ROM_START + rom.len()].clone_from_slice(&rom);
}
pub fn beep(&self) -> bool {
- false
+ self.st > 0
}
pub fn pc(&self) -> u16 {
--
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