1//============================================================================
2//
3// SSSS tt lll lll
4// SS SS tt ll ll
5// SS tttttt eeee ll ll aaaa
6// SSSS tt ee ee ll ll aa
7// SS tt eeeeee ll ll aaaaa -- "An Atari 2600 VCS Emulator"
8// SS SS tt ee ll ll aa aa
9// SSSS ttt eeeee llll llll aaaaa
10//
11// Copyright (c) 1995-2019 by Bradford W. Mott, Stephen Anthony
12// and the Stella Team
13//
14// See the file "License.txt" for information on usage and redistribution of
15// this file, and for a DISCLAIMER OF ALL WARRANTIES.
16//============================================================================
17
18#include "System.hxx"
19#include "Cart4K.hxx"
20
21// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
22Cartridge4K::Cartridge4K(const ByteBuffer& image, size_t size,
23 const string& md5, const Settings& settings)
24 : Cartridge(settings, md5)
25{
26 // Copy the ROM image into my buffer
27 std::copy_n(image.get(), std::min(myImage.size(), size), myImage.begin());
28 createCodeAccessBase(myImage.size());
29}
30
31// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
32void Cartridge4K::reset()
33{
34 myBankChanged = true;
35}
36
37// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
38void Cartridge4K::install(System& system)
39{
40 mySystem = &system;
41
42 // Map ROM image into the system
43 // Note that we don't need our own peek/poke methods, since the mapping
44 // takes care of the entire address space
45 System::PageAccess access(this, System::PageAccessType::READ);
46 for(uInt16 addr = 0x1000; addr < 0x2000; addr += System::PAGE_SIZE)
47 {
48 access.directPeekBase = &myImage[addr & 0x0FFF];
49 access.codeAccessBase = &myCodeAccessBase[addr & 0x0FFF];
50 mySystem->setPageAccess(addr, access);
51 }
52}
53
54// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
55bool Cartridge4K::patch(uInt16 address, uInt8 value)
56{
57 myImage[address & 0x0FFF] = value;
58 return myBankChanged = true;
59}
60
61// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
62const uInt8* Cartridge4K::getImage(size_t& size) const
63{
64 size = myImage.size();
65 return myImage.data();
66}
67