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Started on the SSD/DSD support. Realised I had ommitted multiple head support from my disk class. Fixed that.

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This commit is contained in:
Thomas Harte 2016-09-18 19:21:02 -04:00
parent 5409c8ec54
commit 91cd7e143b
11 changed files with 123 additions and 10 deletions
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6
OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj
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@ -357,6 +357,7 @@
4BF1354C1D6D2C300054B2EA /* StaticAnalyser.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4BF1354A1D6D2C300054B2EA /* StaticAnalyser.cpp */; };
4BF8295D1D8F048B001BAE39 /* MFM.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4BF8295B1D8F048B001BAE39 /* MFM.cpp */; };
4BF829601D8F3C87001BAE39 /* CRC.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4BF8295E1D8F3C87001BAE39 /* CRC.cpp */; };
4BF829631D8F536B001BAE39 /* SSD.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4BF829611D8F536B001BAE39 /* SSD.cpp */; };
/* End PBXBuildFile section */
/* Begin PBXContainerItemProxy section */
@ -811,6 +812,8 @@
4BF8295C1D8F048B001BAE39 /* MFM.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; name = MFM.hpp; path = Encodings/MFM.hpp; sourceTree = "<group>"; };
4BF8295E1D8F3C87001BAE39 /* CRC.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = CRC.cpp; path = ../../NumberTheory/CRC.cpp; sourceTree = "<group>"; };
4BF8295F1D8F3C87001BAE39 /* CRC.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; name = CRC.hpp; path = ../../NumberTheory/CRC.hpp; sourceTree = "<group>"; };
4BF829611D8F536B001BAE39 /* SSD.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = SSD.cpp; sourceTree = "<group>"; };
4BF829621D8F536B001BAE39 /* SSD.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = SSD.hpp; sourceTree = "<group>"; };
/* End PBXFileReference section */
/* Begin PBXFrameworksBuildPhase section */
@ -1117,6 +1120,8 @@
4BAB62B41D327F7E00DF5BA0 /* G64.hpp */,
4B4C836E1D4F623200CD541F /* D64.cpp */,
4B4C836F1D4F623200CD541F /* D64.hpp */,
4BF829611D8F536B001BAE39 /* SSD.cpp */,
4BF829621D8F536B001BAE39 /* SSD.hpp */,
);
path = Formats;
sourceTree = "<group>";
@ -2112,6 +2117,7 @@
4B643F3A1D77AD1900D431D6 /* CSStaticAnalyser.mm in Sources */,
4B4DC8281D2C2470003C5BF8 /* C1540.cpp in Sources */,
4B1E85751D170228001EF87D /* Typer.cpp in Sources */,
4BF829631D8F536B001BAE39 /* SSD.cpp in Sources */,
4B2E2D9D1C3A070400138695 /* Electron.cpp in Sources */,
4BAB62B81D3302CA00DF5BA0 /* PCMTrack.cpp in Sources */,
4B69FB3D1C4D908A00B5F0AA /* Tape.cpp in Sources */,

4
StaticAnalyser/StaticAnalyser.cpp
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@ -22,6 +22,7 @@
// Disks
#include "../Storage/Disk/Formats/D64.hpp"
#include "../Storage/Disk/Formats/G64.hpp"
#include "../Storage/Disk/Formats/SSD.hpp"
// Tapes
#include "../Storage/Tape/Formats/CommodoreTAP.hpp"
@ -81,6 +82,7 @@ std::list<Target> StaticAnalyser::GetTargets(const char *file_name)
Format("a26", cartridges, Cartridge::BinaryDump, TargetPlatform::Atari2600) // A26
Format("bin", cartridges, Cartridge::BinaryDump, TargetPlatform::Atari2600) // BIN
Format("d64", disks, Disk::D64, TargetPlatform::Commodore) // D64
Format("dsd", disks, Disk::SSD, TargetPlatform::Acorn) // DSD
Format("g64", disks, Disk::G64, TargetPlatform::Commodore) // G64
// PRG
@ -98,8 +100,8 @@ std::list<Target> StaticAnalyser::GetTargets(const char *file_name)
}
}
// ROM
Format("rom", cartridges, Cartridge::BinaryDump, TargetPlatform::Acorn) // ROM
Format("ssd", disks, Disk::SSD, TargetPlatform::Acorn) // SSD
Format("tap", tapes, Tape::CommodoreTAP, TargetPlatform::Commodore) // TAP
Format("uef", tapes, Tape::UEF, TargetPlatform::Acorn) // UEF (tape)

7
Storage/Disk/Disk.hpp
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@ -73,10 +73,15 @@ class Disk {
*/
virtual unsigned int get_head_position_count() = 0;
/*!
Returns the number of heads (and, therefore, impliedly surfaces) available on this disk.
*/
virtual unsigned int get_head_count() { return 1; }
/*!
Returns the @c Track at @c position if there are any detectable events there; returns @c nullptr otherwise.
*/
virtual std::shared_ptr<Track> get_track_at_position(unsigned int position) = 0;
virtual std::shared_ptr<Track> get_track_at_position(unsigned int head, unsigned int position) = 0;
};
}

2
Storage/Disk/DiskDrive.cpp
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@ -60,7 +60,7 @@ void Drive::step(int direction)
void Drive::set_track(Time initial_offset)
{
_track = _disk->get_track_at_position((unsigned int)_head_position);
_track = _disk->get_track_at_position(0, (unsigned int)_head_position);
// TODO: probably a better implementation of the empty track?
Time offset;
if(_track && _time_into_track.length > 0)

2
Storage/Disk/Encodings/MFM.cpp
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@ -191,7 +191,7 @@ template<class T> std::shared_ptr<Storage::Disk::Track>
while(shifter.segment.data.size() < expected_track_bytes) shifter.add_byte(0x00);
shifter.segment.number_of_bits = shifter.segment.data.size() * 8;
shifter.segment.number_of_bits = (unsigned int)(shifter.segment.data.size() * 8);
return std::shared_ptr<Storage::Disk::Track>(new Storage::Disk::PCMTrack(std::move(shifter.segment)));
}

6
Storage/Disk/Formats/D64.cpp
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@ -53,10 +53,10 @@ unsigned int D64::get_head_position_count()
return _number_of_tracks*2;
}
std::shared_ptr<Track> D64::get_track_at_position(unsigned int position)
std::shared_ptr<Track> D64::get_track_at_position(unsigned int head, unsigned int position)
{
// every other track is missing
if(position&1)
// every other track is missing, as is any head above 0
if(position&1 || head)
return std::shared_ptr<Track>();
// figure out where this track starts on the disk

2
Storage/Disk/Formats/D64.hpp
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@ -35,7 +35,7 @@ class D64: public Disk {
// implemented to satisfy @c Disk
unsigned int get_head_position_count();
std::shared_ptr<Track> get_track_at_position(unsigned int position);
std::shared_ptr<Track> get_track_at_position(unsigned int head, unsigned int position);
private:
FILE *_file;

3
Storage/Disk/Formats/G64.cpp
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@ -54,13 +54,14 @@ unsigned int G64::get_head_position_count()
return _number_of_tracks > 84 ? _number_of_tracks : 84;
}
std::shared_ptr<Track> G64::get_track_at_position(unsigned int position)
std::shared_ptr<Track> G64::get_track_at_position(unsigned int head, unsigned int position)
{
std::shared_ptr<Track> resulting_track;
// if there's definitely no track here, return the empty track
// (TODO: should be supplying one with an index hole?)
if(position >= _number_of_tracks) return resulting_track;
if(head >= 1) return resulting_track;
// seek to this track's entry in the track table
fseek(_file, (long)((position * 4) + 0xc), SEEK_SET);

2
Storage/Disk/Formats/G64.hpp
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@ -37,7 +37,7 @@ class G64: public Disk {
// implemented to satisfy @c Disk
unsigned int get_head_position_count();
std::shared_ptr<Track> get_track_at_position(unsigned int position);
std::shared_ptr<Track> get_track_at_position(unsigned int head, unsigned int position);
private:
FILE *_file;

51
Storage/Disk/Formats/SSD.cpp Normal file
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@ -0,0 +1,51 @@
//
// SSD.cpp
// Clock Signal
//
// Created by Thomas Harte on 18/09/2016.
// Copyright © 2016 Thomas Harte. All rights reserved.
//
#include "SSD.hpp"
#include <sys/stat.h>
using namespace Storage::Disk;
SSD::SSD(const char *file_name) : _file(nullptr)
{
struct stat file_stats;
stat(file_name, &file_stats);
// very loose validation: the file needs to be a multiple of 256 bytes
// and not ungainly large
if(file_stats.st_size & 255) throw ErrorNotSSD;
if(file_stats.st_size < 512) throw ErrorNotSSD;
if(file_stats.st_size > 800*256) throw ErrorNotSSD;
_file = fopen(file_name, "rb");
if(!_file) throw ErrorCantOpen;
}
SSD::~SSD()
{
if(_file) fclose(_file);
}
unsigned int SSD::get_head_position_count()
{
return 1;
}
unsigned int SSD::get_head_count()
{
return 1;
}
std::shared_ptr<Track> SSD::get_track_at_position(unsigned int head, unsigned int position)
{
std::shared_ptr<Track> track;
return track;
}

48
Storage/Disk/Formats/SSD.hpp Normal file
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@ -0,0 +1,48 @@
//
// SSD.hpp
// Clock Signal
//
// Created by Thomas Harte on 18/09/2016.
// Copyright © 2016 Thomas Harte. All rights reserved.
//
#ifndef SSD_hpp
#define SSD_hpp
#include "../Disk.hpp"
namespace Storage {
namespace Disk {
/*!
Provies a @c Disk containing a DSD or SSD disk image — a decoded sector dump of an Acorn DFS disk.
*/
class SSD: public Disk {
public:
/*!
Construct a @c D64 containing content from the file with name @c file_name.
@throws ErrorCantOpen if this file can't be opened.
@throws ErrorNotD64 if the file doesn't appear to contain a .D64 format image.
*/
SSD(const char *file_name);
~SSD();
enum {
ErrorCantOpen,
ErrorNotSSD,
};
// implemented to satisfy @c Disk
unsigned int get_head_position_count();
unsigned int get_head_count();
std::shared_ptr<Track> get_track_at_position(unsigned int head, unsigned int position);
private:
FILE *_file;
};
}
}
#endif /* SSD_hpp */