mirror of
https://github.com/davidgiven/fluxengine.git
synced 2025-10-24 11:11:02 -07:00
129 lines
2.9 KiB
C++
129 lines
2.9 KiB
C++
#include "globals.h"
|
|
#include "flags.h"
|
|
#include "dataspec.h"
|
|
#include "sector.h"
|
|
#include "sectorset.h"
|
|
#include "imagereader/imagereader.h"
|
|
#include "fmt/format.h"
|
|
#include <algorithm>
|
|
#include <iostream>
|
|
#include <fstream>
|
|
|
|
class DiskCopyImageReader : public ImageReader
|
|
{
|
|
public:
|
|
DiskCopyImageReader(const ImageSpec& spec):
|
|
ImageReader(spec)
|
|
{}
|
|
|
|
SectorSet readImage()
|
|
{
|
|
std::ifstream inputFile(spec.filename, std::ios::in | std::ios::binary);
|
|
if (!inputFile.is_open())
|
|
Error() << "cannot open input file";
|
|
|
|
Bytes data;
|
|
data.writer() += inputFile;
|
|
ByteReader br(data);
|
|
|
|
br.seek(1);
|
|
std::string label = br.read(data[0]);
|
|
|
|
br.seek(0x40);
|
|
uint32_t dataSize = br.read_be32();
|
|
|
|
br.seek(0x50);
|
|
uint8_t encoding = br.read_8();
|
|
uint8_t formatByte = br.read_8();
|
|
|
|
unsigned numCylinders = 80;
|
|
unsigned numHeads = 2;
|
|
unsigned numSectors = 0;
|
|
bool mfm = false;
|
|
|
|
switch (encoding)
|
|
{
|
|
case 0: /* GCR CLV 400kB */
|
|
numHeads = 1;
|
|
break;
|
|
|
|
case 1: /* GCR CLV 800kB */
|
|
break;
|
|
|
|
case 2: /* MFM CAV 720kB */
|
|
numSectors = 9;
|
|
mfm = true;
|
|
break;
|
|
|
|
case 3: /* MFM CAV 1440kB */
|
|
numSectors = 18;
|
|
mfm = true;
|
|
break;
|
|
|
|
default:
|
|
Error() << fmt::format("don't understand DiskCopy disks of type {}", encoding);
|
|
}
|
|
|
|
std::cout << "reading DiskCopy 4.2 image\n"
|
|
<< fmt::format("{} cylinders, {} heads; {}; {}\n",
|
|
numCylinders, numHeads,
|
|
mfm ? "MFM" : "GCR",
|
|
label);
|
|
|
|
auto sectorsPerTrack = [&](int track) -> int
|
|
{
|
|
if (mfm)
|
|
return numSectors;
|
|
|
|
if (track < 16)
|
|
return 12;
|
|
if (track < 32)
|
|
return 11;
|
|
if (track < 48)
|
|
return 10;
|
|
if (track < 64)
|
|
return 9;
|
|
return 8;
|
|
};
|
|
|
|
uint32_t dataPtr = 0x54;
|
|
uint32_t tagPtr = dataPtr + dataSize;
|
|
|
|
SectorSet sectors;
|
|
for (int track = 0; track < numCylinders; track++)
|
|
{
|
|
int numSectors = sectorsPerTrack(track);
|
|
for (int head = 0; head < numHeads; head++)
|
|
{
|
|
for (int sectorId = 0; sectorId < numSectors; sectorId++)
|
|
{
|
|
br.seek(dataPtr);
|
|
Bytes payload = br.read(512);
|
|
dataPtr += 512;
|
|
|
|
br.seek(tagPtr);
|
|
Bytes tag = br.read(12);
|
|
tagPtr += 12;
|
|
|
|
std::unique_ptr<Sector>& sector = sectors.get(track, head, sectorId);
|
|
sector.reset(new Sector);
|
|
sector->status = Sector::OK;
|
|
sector->logicalTrack = sector->physicalTrack = track;
|
|
sector->logicalSide = sector->physicalSide = head;
|
|
sector->logicalSector = sectorId;
|
|
sector->data.writer().append(payload).append(tag);
|
|
}
|
|
}
|
|
}
|
|
return sectors;
|
|
}
|
|
};
|
|
|
|
std::unique_ptr<ImageReader> ImageReader::createDiskCopyImageReader(
|
|
const ImageSpec& spec)
|
|
{
|
|
return std::unique_ptr<ImageReader>(new DiskCopyImageReader(spec));
|
|
}
|
|
|
|
|