blob: 6278b1c94b7934fc1a1c565489acba3131e35506 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
use super::bus::Bus;
use std::fmt;
const RESET_VALUE_ACC: u8 = 0x00;
const RESET_VALUE_SP: u8 = 0x07;
pub const RAM_OFFSET_ACC: u8 = 0xE0;
pub const RAM_OFFSET_SP: u8 = 0x80;
pub struct Ram {
array: [u8; u8::max_value() as usize + 1],
}
impl fmt::Debug for Ram {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let mut v: Vec<char> = vec![];
for (c, x) in self.array.iter().enumerate() {
for hex_char in format!("{:02X}", *x).chars() {
v.push(hex_char);
}
v.push(' ');
if c % 8 == 7 {
v.push('\n');
}
}
write!(f, "{}", v.iter().collect::<String>())
}
}
impl Ram {
/// Empty constructor
pub fn new() -> Self {
let mut array = [0; u8::max_value() as usize + 1];
array[RAM_OFFSET_SP as usize] = RESET_VALUE_SP;
array[RAM_OFFSET_ACC as usize] = RESET_VALUE_ACC;
Self { array }
}
}
impl Bus<u8> for Ram {
fn get(&self, a: u8) -> u8 {
self.array[a as usize]
}
fn set(&mut self, a: u8, v: u8) {
self.array[a as usize] = v;
}
}
|
