-
Notifications
You must be signed in to change notification settings - Fork 0
/
ram.go
51 lines (42 loc) · 1.27 KB
/
ram.go
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
49
50
51
// Copyright (C) 2022 James Grant
//
// This is part of munch as 6502 emulator
//
// Munch is free software: you can redistribute it and/or modify it under the terms of the GNU
// General Public License as published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// Munch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with Munch. If not, see
// <https://www.gnu.org/licenses/>.
package munch
type Ram struct {
bytes []uint8
}
func NewRam(size uint) *Ram {
if size > 0x10000 {
size = 0x10000
}
return &Ram{bytes: make([]uint8, size)}
}
func (r *Ram) Read(addr uint16) uint8 {
return r.bytes[int(addr)%len(r.bytes)]
}
func (r *Ram) Write(addr uint16, v uint8) {
r.bytes[int(addr)%len(r.bytes)] = v
}
type Rom struct {
bytes []uint8
}
func NewRom(bytes []uint8) *Rom {
b := make([]byte, len(bytes))
copy(b, bytes)
return &Rom{bytes: b}
}
func (r *Rom) Read(addr uint16) uint8 {
return r.bytes[int(addr)%len(r.bytes)]
}
func (r *Rom) Write(addr uint16, v uint8) {}