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Added CRC checking to DFS comprehension; fixed a bunch of places where I'd used Objective-C's #import rather than #include.

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This commit is contained in:
Thomas Harte 2016-09-19 08:16:06 -04:00
parent c58cdbf151
commit 64f2538b1f
4 changed files with 21 additions and 6 deletions
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2
Machines/Commodore/SerialBus.hpp
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@ -9,7 +9,7 @@
#ifndef SerialBus_hpp
#define SerialBus_hpp
#import <vector>
#include <vector>
namespace Commodore {
namespace Serial {

19
StaticAnalyser/Acorn/Disk.cpp
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@ -9,13 +9,17 @@
#include "Disk.hpp"
#include "../../Storage/Disk/DiskDrive.hpp"
#include "../../Storage/Disk/Encodings/MFM.hpp"
#include "../../NumberTheory/CRC.hpp"
#include <algorithm>
using namespace StaticAnalyser::Acorn;
class FMParser: public Storage::Disk::Drive {
public:
FMParser() : Storage::Disk::Drive(4000000, 1, 300), shift_register_(0), track_(0)
FMParser() :
Storage::Disk::Drive(4000000, 1, 300),
crc_generator_(0x1021, 0xffff),
shift_register_(0), track_(0)
{
// Make sure this drive really is at track '1'.
while(!get_is_track_zero()) step(-1);
@ -53,6 +57,7 @@ class FMParser: public Storage::Disk::Drive {
uint8_t track_;
int bit_count_;
std::shared_ptr<Storage::Encodings::MFM::Sector> sector_cache_[65536];
NumberTheory::CRC16 crc_generator_;
void process_input_bit(int value, unsigned int cycles_since_index_hole)
{
@ -69,7 +74,7 @@ class FMParser: public Storage::Disk::Drive {
{
bit_count_ = 0;
while(bit_count_ < 16) run_for_cycles(1);
return (uint8_t)(
uint8_t byte = (uint8_t)(
((shift_register_&0x0001) >> 0) |
((shift_register_&0x0004) >> 1) |
((shift_register_&0x0010) >> 2) |
@ -78,6 +83,8 @@ class FMParser: public Storage::Disk::Drive {
((shift_register_&0x0400) >> 5) |
((shift_register_&0x1000) >> 6) |
((shift_register_&0x4000) >> 7));
crc_generator_.add(byte);
return byte;
}
std::shared_ptr<Storage::Encodings::MFM::Sector> get_next_sector()
@ -95,10 +102,14 @@ class FMParser: public Storage::Disk::Drive {
if(index_count_ >= 2) return nullptr;
}
crc_generator_.reset();
sector->track = get_next_byte();
sector->side = get_next_byte();
sector->sector = get_next_byte();
uint8_t size = get_next_byte();
uint16_t header_crc = crc_generator_.get_value();
if((header_crc >> 8) != get_next_byte()) continue;
if((header_crc & 0xff) != get_next_byte()) continue;
// look for data mark
while(1)
@ -111,10 +122,14 @@ class FMParser: public Storage::Disk::Drive {
size_t data_size = (size_t)(128 << size);
sector->data.reserve(data_size);
crc_generator_.reset();
for(size_t c = 0; c < data_size; c++)
{
sector->data.push_back(get_next_byte());
}
uint16_t data_crc = crc_generator_.get_value();
if((data_crc >> 8) != get_next_byte()) continue;
if((data_crc & 0xff) != get_next_byte()) continue;
return sector;
}

4
Storage/Disk/Encodings/MFM.cpp
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@ -8,8 +8,8 @@
#include "MFM.hpp"
#import "../PCMTrack.hpp"
#import "../../../NumberTheory/CRC.hpp"
#include "../PCMTrack.hpp"
#include "../../../NumberTheory/CRC.hpp"
using namespace Storage::Encodings::MFM;

2
Storage/Disk/Encodings/MFM.hpp
View File

@ -11,7 +11,7 @@
#include <cstdint>
#include <vector>
#import "../Disk.hpp"
#include "../Disk.hpp"
namespace Storage {
namespace Encodings {