mirror of
https://github.com/TomHarte/CLK.git
synced 2024-10-18 08:24:17 +00:00
b8a1553368
Albeit a bit of a guess, since it's not intended to be an emulator file format.
50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
//
|
|
// PlusTooBIN.cpp
|
|
// Clock Signal
|
|
//
|
|
// Created by Thomas Harte on 04/06/2019.
|
|
// Copyright © 2019 Thomas Harte. All rights reserved.
|
|
//
|
|
|
|
#include "PlusTooBIN.hpp"
|
|
|
|
#include "../../Track/PCMTrack.hpp"
|
|
#include "../../Encodings/AppleGCR/Encoder.hpp"
|
|
|
|
using namespace Storage::Disk;
|
|
|
|
namespace {
|
|
const long sector_size = 1024;
|
|
}
|
|
|
|
PlusTooBIN::PlusTooBIN(const std::string &file_name) :
|
|
file_(file_name) {
|
|
// BIN isn't really meant to be an emulator file format, it's primarily
|
|
// a convenience for the PlusToo Macintosh clone. So validation is
|
|
// fairly light.
|
|
if(file_.stats().st_size != 1638400)
|
|
throw Error::InvalidFormat;
|
|
}
|
|
|
|
HeadPosition PlusTooBIN::get_maximum_head_position() {
|
|
return HeadPosition(80);
|
|
}
|
|
|
|
int PlusTooBIN::get_head_count() {
|
|
return 2;
|
|
}
|
|
|
|
std::shared_ptr<Track> PlusTooBIN::get_track_at_position(Track::Address address) {
|
|
if(address.position >= get_maximum_head_position()) return nullptr;
|
|
if(address.head >= get_head_count()) return nullptr;
|
|
|
|
const auto start_position = Encodings::AppleGCR::Macintosh::sectors_in_track(address.position.as_int());
|
|
const long file_offset = long(start_position.start * 2 + address.head * start_position.start) * sector_size;
|
|
file_.seek(file_offset, SEEK_SET);
|
|
|
|
const auto track_contents = file_.read(std::size_t(sector_size * start_position.length));
|
|
const std::size_t number_of_bits = std::size_t(sector_size * start_position.length * 8);
|
|
|
|
return std::shared_ptr<PCMTrack>(new PCMTrack(PCMSegment(number_of_bits, track_contents)));
|
|
}
|