mirror of
https://github.com/TomHarte/CLK.git
synced 2024-11-03 08:05:40 +00:00
46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
//
|
|
// SSD.cpp
|
|
// Clock Signal
|
|
//
|
|
// Created by Thomas Harte on 18/09/2016.
|
|
// Copyright 2016 Thomas Harte. All rights reserved.
|
|
//
|
|
|
|
#include "SSD.hpp"
|
|
|
|
namespace {
|
|
constexpr int sectors_per_track = 10;
|
|
constexpr int sector_size = 1;
|
|
}
|
|
|
|
using namespace Storage::Disk;
|
|
|
|
SSD::SSD(const std::string &file_name) : MFMSectorDump(file_name) {
|
|
// very loose validation: the file needs to be a multiple of 256 bytes
|
|
// and not ungainly large
|
|
|
|
if(file_.stats().st_size & 255) throw Error::InvalidFormat;
|
|
if(file_.stats().st_size < 512) throw Error::InvalidFormat;
|
|
if(file_.stats().st_size > 800*256) throw Error::InvalidFormat;
|
|
|
|
// this has two heads if the suffix is .dsd, one if it's .ssd
|
|
head_count_ = (tolower(file_name[file_name.size() - 3]) == 'd') ? 2 : 1;
|
|
track_count_ = int(file_.stats().st_size / (256 * 10 * head_count_));
|
|
if(track_count_ < 40) track_count_ = 40;
|
|
else if(track_count_ < 80) track_count_ = 80;
|
|
|
|
set_geometry(sectors_per_track, sector_size, 0, false);
|
|
}
|
|
|
|
HeadPosition SSD::get_maximum_head_position() {
|
|
return HeadPosition(track_count_);
|
|
}
|
|
|
|
int SSD::get_head_count() {
|
|
return head_count_;
|
|
}
|
|
|
|
long SSD::get_file_offset_for_position(Track::Address address) {
|
|
return (address.position.as_int() * head_count_ + address.head) * 256 * 10;
|
|
}
|