mirror of
https://github.com/TomHarte/CLK.git
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Made an attempt quickly to implement parsing of the Commodore .TAP file format.
This commit is contained in:
Thomas Harte
parent
e9bf9034e3
commit
ee19417ded
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@ -320,6 +320,7 @@
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4BC751B61D157EB3006C31D9 /* MOS6522Bridge.mm in Sources */ = {isa = PBXBuildFile; fileRef = 4BC751B51D157EB3006C31D9 /* MOS6522Bridge.mm */; };
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4BC76E691C98E31700E6EF73 /* FIRFilter.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4BC76E671C98E31700E6EF73 /* FIRFilter.cpp */; };
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4BC76E6B1C98F43700E6EF73 /* Accelerate.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 4BC76E6A1C98F43700E6EF73 /* Accelerate.framework */; };
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4BC91B831D1F160E00884B76 /* CommodoreTAP.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4BC91B811D1F160E00884B76 /* CommodoreTAP.cpp */; };
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4BC9DF451D044FCA00F44158 /* ROMImages in Resources */ = {isa = PBXBuildFile; fileRef = 4BC9DF441D044FCA00F44158 /* ROMImages */; };
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4BC9DF4F1D04691600F44158 /* 6560.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4BC9DF4D1D04691600F44158 /* 6560.cpp */; };
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4BD5F1951D13528900631CD1 /* CSBestEffortUpdater.m in Sources */ = {isa = PBXBuildFile; fileRef = 4BD5F1941D13528900631CD1 /* CSBestEffortUpdater.m */; };
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@ -701,6 +702,8 @@
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4BC76E671C98E31700E6EF73 /* FIRFilter.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = FIRFilter.cpp; sourceTree = "<group>"; };
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4BC76E681C98E31700E6EF73 /* FIRFilter.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = FIRFilter.hpp; sourceTree = "<group>"; };
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4BC76E6A1C98F43700E6EF73 /* Accelerate.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Accelerate.framework; path = System/Library/Frameworks/Accelerate.framework; sourceTree = SDKROOT; };
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4BC91B811D1F160E00884B76 /* CommodoreTAP.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = CommodoreTAP.cpp; sourceTree = "<group>"; };
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4BC91B821D1F160E00884B76 /* CommodoreTAP.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = CommodoreTAP.hpp; sourceTree = "<group>"; };
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4BC9DF441D044FCA00F44158 /* ROMImages */ = {isa = PBXFileReference; lastKnownFileType = folder; name = ROMImages; path = ../../../../ROMImages; sourceTree = "<group>"; };
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4BC9DF4D1D04691600F44158 /* 6560.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = 6560.cpp; sourceTree = "<group>"; };
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4BC9DF4E1D04691600F44158 /* 6560.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = 6560.hpp; sourceTree = "<group>"; };
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@ -900,6 +903,8 @@
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4B69FB451C4D950F00B5F0AA /* libz.tbd */,
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4B69FB421C4D941400B5F0AA /* TapeUEF.cpp */,
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4B69FB431C4D941400B5F0AA /* TapeUEF.hpp */,
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4BC91B811D1F160E00884B76 /* CommodoreTAP.cpp */,
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4BC91B821D1F160E00884B76 /* CommodoreTAP.hpp */,
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);
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path = Formats;
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sourceTree = "<group>";
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@ -1793,6 +1798,7 @@
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4BC3B7521CD1956900F86E85 /* OutputShader.cpp in Sources */,
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4B14145B1B58879D00E04248 /* CPU6502.cpp in Sources */,
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4B2A53A01D117D36003C6002 /* CSMachine.mm in Sources */,
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4BC91B831D1F160E00884B76 /* CommodoreTAP.cpp in Sources */,
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4B2A539F1D117D36003C6002 /* CSAudioQueue.m in Sources */,
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4BB73EA21B587A5100552FC2 /* AppDelegate.swift in Sources */,
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);
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@ -88,6 +88,18 @@
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<key>NSDocumentClass</key>
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<string>$(PRODUCT_MODULE_NAME).Vic20Document</string>
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</dict>
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<dict>
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<key>CFBundleTypeExtensions</key>
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<array>
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<string>tap</string>
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</array>
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<key>CFBundleTypeName</key>
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<string>Vic-20 Tape Image</string>
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<key>CFBundleTypeRole</key>
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<string>Viewer</string>
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<key>NSDocumentClass</key>
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<string>Vic20Document</string>
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</dict>
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</array>
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<key>CFBundleExecutable</key>
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<string>$(EXECUTABLE_NAME)</string>
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91
Storage/Tape/Formats/CommodoreTAP.cpp
Normal file
91
Storage/Tape/Formats/CommodoreTAP.cpp
Normal file
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@ -0,0 +1,91 @@
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//
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// CommodoreTAP.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 25/06/2016.
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// Copyright © 2016 Thomas Harte. All rights reserved.
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//
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#include "CommodoreTAP.hpp"
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#include <cstdio>
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#include <cstring>
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using namespace Storage;
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CommodoreTAP::CommodoreTAP(const char *file_name)
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{
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_file = fopen(file_name, "rb");
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if(!_file)
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throw ErrorNotCommodoreTAP;
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// read and check the file signature
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char signature[12];
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if(fread(signature, 1, 12, _file) != 12)
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throw ErrorNotCommodoreTAP;
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if(memcmp(signature, "C64-TAPE-RAW", 12))
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throw ErrorNotCommodoreTAP;
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// check the file version
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int version = fgetc(_file);
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switch(version)
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{
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case 0: _updated_layout = false; break;
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case 1: _updated_layout = true; break;
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default: throw ErrorNotCommodoreTAP;
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}
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// skip reserved bytes
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fseek(_file, 3, SEEK_CUR);
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// read file size
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_file_size = (uint32_t)fgetc(_file);
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_file_size |= (uint32_t)(fgetc(_file) << 8);
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_file_size |= (uint32_t)(fgetc(_file) << 16);
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_file_size |= (uint32_t)(fgetc(_file) << 24);
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// set up for pulse output at the PAL clock rate, with each high and
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// low being half of whatever length values will be read; pretend that
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// a high pulse has just been distributed to imply that the next thing
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// that needs to happen is a length check
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_current_pulse.length.clock_rate = 985248 * 2;
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_current_pulse.type = Pulse::High;
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}
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CommodoreTAP::~CommodoreTAP()
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{
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fclose(_file);
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}
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void CommodoreTAP::reset()
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{
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fseek(_file, 0x14, SEEK_SET);
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_current_pulse.type = Pulse::High;
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}
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CommodoreTAP::Pulse CommodoreTAP::get_next_pulse()
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{
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if(_current_pulse.type == Pulse::High)
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{
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uint32_t next_length;
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uint8_t next_byte = (uint8_t)fgetc(_file);
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if(!_updated_layout || next_byte > 0)
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{
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next_length = (uint32_t)next_byte << 3;
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}
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else
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{
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next_length = (uint32_t)fgetc(_file);
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next_length |= (uint32_t)(fgetc(_file) << 8);
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next_length |= (uint32_t)(fgetc(_file) << 16);
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}
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_current_pulse.length.length = next_length;
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_current_pulse.type = Pulse::Low;
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}
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else
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_current_pulse.type = Pulse::High;
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return _current_pulse;
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}
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39
Storage/Tape/Formats/CommodoreTAP.hpp
Normal file
39
Storage/Tape/Formats/CommodoreTAP.hpp
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@ -0,0 +1,39 @@
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//
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// CommodoreTAP.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 25/06/2016.
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// Copyright © 2016 Thomas Harte. All rights reserved.
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//
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#ifndef CommodoreTAP_hpp
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#define CommodoreTAP_hpp
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#include "../Tape.hpp"
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#include <stdint.h>
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namespace Storage {
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class CommodoreTAP: public Tape {
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public:
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CommodoreTAP(const char *file_name);
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~CommodoreTAP();
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Pulse get_next_pulse();
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void reset();
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enum {
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ErrorNotCommodoreTAP
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};
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private:
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FILE *_file;
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bool _updated_layout;
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uint32_t _file_size;
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Pulse _current_pulse;
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};
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}
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#endif /* CommodoreTAP_hpp */
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