mirror of
https://github.com/TomHarte/CLK.git
synced 2024-12-25 18:30:21 +00:00
51 lines
1.2 KiB
C++
51 lines
1.2 KiB
C++
//
|
|
// PRG.cpp
|
|
// Clock Signal
|
|
//
|
|
// Created by Thomas Harte on 27/08/2016.
|
|
// Copyright © 2016 Thomas Harte. All rights reserved.
|
|
//
|
|
|
|
#include "PRG.hpp"
|
|
|
|
#include <cstdio>
|
|
#include <sys/stat.h>
|
|
#include "../Encodings/CommodoreROM.hpp"
|
|
|
|
using namespace Storage::Cartridge;
|
|
|
|
PRG::PRG(const char *file_name)
|
|
{
|
|
struct stat file_stats;
|
|
stat(file_name, &file_stats);
|
|
|
|
// accept only files sized 1, 2, 4 or 8kb
|
|
if(
|
|
file_stats.st_size != 0x400 + 2 &&
|
|
file_stats.st_size != 0x800 + 2 &&
|
|
file_stats.st_size != 0x1000 + 2 &&
|
|
file_stats.st_size != 0x2000 + 2)
|
|
throw ErrorNotROM;
|
|
|
|
// get the loading address, and the rest of the contents
|
|
FILE *file = fopen(file_name, "rb");
|
|
|
|
int loading_address = fgetc(file);
|
|
loading_address |= fgetc(file) << 8;
|
|
|
|
size_t data_length = (size_t)file_stats.st_size - 2;
|
|
std::vector<uint8_t> contents(data_length);
|
|
fread(&contents[0], 1, (size_t)(data_length), file);
|
|
fclose(file);
|
|
|
|
// accept only files intended to load at 0xa000
|
|
if(loading_address != 0xa000)
|
|
throw ErrorNotROM;
|
|
|
|
// also accept only cartridges with the proper signature
|
|
if(!Storage::Cartridge::Encodings::CommodoreROM::isROM(contents))
|
|
throw ErrorNotROM;
|
|
|
|
segments_.emplace_back(0xa000, 0xa000 + data_length, std::move(contents));
|
|
}
|