Task 699: .STX File Format
Task 699: .STX File Format
1. List of Properties for .STX File Format (Pasti Atari ST Disk Image)
Based on the specifications of the Pasti .STX file format, which is a disk image format for preserving Atari ST floppy disks (including copy-protected ones), the key intrinsic properties (structures and fields) are as follows. These are derived from the file's binary layout and are essential to its structure as a disk image format emulating the Atari ST file system and floppy characteristics. All multi-byte values are little-endian unless noted.
File Descriptor (Header, 16 bytes):
- File Identifier (4 bytes): String "RSY\0".
- Version (2 bytes): Typically 0x03.
- Tool (2 bytes): 0x01 for Atari imaging tool, 0xCC for Discovery Cartridge tool.
- Reserved 1 (2 bytes): Usually 0x00.
- Track Count (1 byte): Number of tracks (e.g., 80 or 160 for double-sided).
- Revision (1 byte): 0x00 for old format, 0x02 for new (affects sector timing handling).
- Reserved 2 (4 bytes): Usually 0x00 (may be 0xCCCC in early files).
Track Descriptor (Per Track, 16 bytes):
- Record Size (4 bytes): Total size of this track record.
- Fuzzy Count (4 bytes): Size of optional fuzzy mask in bytes.
- Sector Count (2 bytes): Number of sectors in the track (0 for empty/unformatted).
- Track Flags (2 bytes): Bitmask (e.g., bit 7: sync info present; bit 6: track image present; bit 0: sector descriptors present).
- Track Length (2 bytes): Length of track in bytes (typically ~6250).
- Track Number (1 byte): Track ID (bits 0-6: track 0-79/81; bit 7: side, 0=A, 1=B).
- Track Type (1 byte): 0x00 for WD1772 dump, 0xCC for Discovery Cartridge dump.
Sector Descriptor (Optional, per sector if track flags bit 0 set, 16 bytes each):
- Data Offset (4 bytes): Offset to sector data in track data record.
- Bit Position (2 bytes): Position of sector address block in bits from track start.
- Read Time (2 bytes): Sector read time in μs (0 for standard ~16384 μs).
- Track (1 byte): Track number from address block.
- Head (1 byte): Head/side number (0 or 1).
- Number (1 byte): Sector number (typically 1-11).
- Size (1 byte): Sector size code (0=128 bytes, 1=256, 2=512, 3=1024; actual size = 128 << size).
- CRC (2 bytes): CRC16 of address block.
- FDC Flags (1 byte): FDC status (bit 7: fuzzy bits; bit 5: deleted data; bit 4: record not found; bit 3: CRC error; bit 0: intra-sector bit width variation).
- Reserved (1 byte): Usually 0x00.
Fuzzy Mask (Optional, variable size based on fuzzy count):
- Mask Bytes (variable): Bitmask for fuzzy (non-deterministic) bits in sectors; applied to sectors with FDC flags bit 7 set.
Track Data Record (Variable):
- Optional Track Image Header (2 or 4 bytes if track flags bit 6 set): Length (2 bytes) or sync offset (2 bytes) + length (2 bytes) if bit 7 set.
- Track Image Content (variable): Raw track dump (WD1772 or DC type).
- Optional Sector Images (variable): Individual sector data if not embedded in track image.
Timing Record (Optional, for revision 0x02 with intra-sector variations):
- Timing Descriptor + Data (variable): Describes bit width variations (e.g., for Macrodos/Speedlock protections).
These properties capture the format's ability to represent low-level floppy details like protections, fuzzy bits, and timing, which are intrinsic to emulating the Atari ST's TOS/GEMDOS file system on floppies.
2. Two Direct Download Links for .STX Files
- https://www.planetemu.net/rom/atari-st-games-stx/afterburner-1988-activision-disk-1-of-2
- https://www.planetemu.net/rom/atari-st-games-stx/afterburner-1988-activision-disk-2-of-2
These are direct links to Atari ST game disk images in .STX format (Afterburner, Disks 1 and 2).
3. Ghost Blog Embedded HTML/JavaScript for Drag-and-Drop .STX File Dump
Drag and drop .STX file here
This HTML/JS allows dragging and dropping a .STX file, parses the binary, and dumps the properties (headers and fields) to the screen. It focuses on reading headers; full data skipping is simplified for brevity.
4. Python Class for .STX File Handling
import struct
import os
class STXFile:
def __init__(self, filepath=None):
self.filepath = filepath
self.file_header = None
self.tracks = []
if filepath:
self.read()
def read(self):
with open(self.filepath, 'rb') as f:
data = f.read()
offset = 0
# File Descriptor
self.file_header = {}
self.file_header['id'] = struct.unpack_from('<4s', data, offset)[0].decode('ascii')
offset += 4
self.file_header['version'] = struct.unpack_from('<H', data, offset)[0]
offset += 2
self.file_header['tool'] = struct.unpack_from('<H', data, offset)[0]
offset += 2
self.file_header['reserved1'] = struct.unpack_from('<H', data, offset)[0]
offset += 2
self.file_header['track_count'] = struct.unpack_from('<B', data, offset)[0]
offset += 1
self.file_header['revision'] = struct.unpack_from('<B', data, offset)[0]
offset += 1
self.file_header['reserved2'] = struct.unpack_from('<I', data, offset)[0]
offset += 4
for _ in range(self.file_header['track_count']):
track = {}
track['record_size'] = struct.unpack_from('<I', data, offset)[0]
offset += 4
track['fuzzy_count'] = struct.unpack_from('<I', data, offset)[0]
offset += 4
track['sector_count'] = struct.unpack_from('<H', data, offset)[0]
offset += 2
track['flags'] = struct.unpack_from('<H', data, offset)[0]
offset += 2
track['length'] = struct.unpack_from('<H', data, offset)[0]
offset += 2
track['number'] = struct.unpack_from('<B', data, offset)[0]
offset += 1
track['type'] = struct.unpack_from('<B', data, offset)[0]
offset += 1
track['sectors'] = []
if track['flags'] & 0x01:
for __ in range(track['sector_count']):
sector = {}
sector['data_offset'] = struct.unpack_from('<I', data, offset)[0]
offset += 4
sector['bit_position'] = struct.unpack_from('<H', data, offset)[0]
offset += 2
sector['read_time'] = struct.unpack_from('<H', data, offset)[0]
offset += 2
sector['track'] = struct.unpack_from('<B', data, offset)[0]
offset += 1
sector['head'] = struct.unpack_from('<B', data, offset)[0]
offset += 1
sector['number'] = struct.unpack_from('<B', data, offset)[0]
offset += 1
sector['size'] = struct.unpack_from('<B', data, offset)[0]
offset += 1
sector['crc'] = struct.unpack_from('<H', data, offset)[0]
offset += 2
sector['fdc_flags'] = struct.unpack_from('<B', data, offset)[0]
offset += 1
sector['reserved'] = struct.unpack_from('<B', data, offset)[0]
offset += 1
track['sectors'].append(sector)
# Skip fuzzy, track data, timing for now (can add full decoding if needed)
# Advance by remaining record size (track['record_size'] - parsed bytes)
parsed_track_bytes = 16 + (16 * track['sector_count'] if track['flags'] & 0x01 else 0)
offset += track['record_size'] - parsed_track_bytes # Simplified; adjust for full
self.tracks.append(track)
def print_properties(self):
print('File Header:')
for k, v in self.file_header.items():
print(f' {k}: {v}')
for i, track in enumerate(self.tracks):
print(f'\nTrack {i}:')
for k, v in track.items():
if k != 'sectors':
print(f' {k}: {v}')
for j, sector in enumerate(track.get('sectors', [])):
print(f' Sector {j}:')
for sk, sv in sector.items():
print(f' {sk}: {sv}')
def write(self, new_filepath=None):
if not new_filepath:
new_filepath = self.filepath + '.new'
with open(new_filepath, 'wb') as f:
# Write File Descriptor
f.write(struct.pack('<4s', self.file_header['id'].encode('ascii')))
f.write(struct.pack('<H', self.file_header['version']))
f.write(struct.pack('<H', self.file_header['tool']))
f.write(struct.pack('<H', self.file_header['reserved1']))
f.write(struct.pack('<B', self.file_header['track_count']))
f.write(struct.pack('<B', self.file_header['revision']))
f.write(struct.pack('<I', self.file_header['reserved2']))
# Write tracks (simplified; assumes no data changes, skips full data write for brevity)
for track in self.tracks:
f.write(struct.pack('<I', track['record_size']))
f.write(struct.pack('<I', track['fuzzy_count']))
f.write(struct.pack('<H', track['sector_count']))
f.write(struct.pack('<H', track['flags']))
f.write(struct.pack('<H', track['length']))
f.write(struct.pack('<B', track['number']))
f.write(struct.pack('<B', track['type']))
if track['flags'] & 0x01:
for sector in track['sectors']:
f.write(struct.pack('<I', sector['data_offset']))
f.write(struct.pack('<H', sector['bit_position']))
f.write(struct.pack('<H', sector['read_time']))
f.write(struct.pack('<B', sector['track']))
f.write(struct.pack('<B', sector['head']))
f.write(struct.pack('<B', sector['number']))
f.write(struct.pack('<B', sector['size']))
f.write(struct.pack('<H', sector['crc']))
f.write(struct.pack('<B', sector['fdc_flags']))
f.write(struct.pack('<B', sector['reserved']))
# Add fuzzy/track data write logic if needed; omitted for brevity
# Example usage:
# stx = STXFile('example.stx')
# stx.print_properties()
# stx.write()
This class reads a .STX file, decodes headers, prints properties to console, and supports basic writing (headers only; full data write requires additional logic for fuzzy/track content).
5. Java Class for .STX File Handling
import java.io.*;
import java.nio.*;
import java.nio.file.*;
public class STXFile {
private Path filepath;
private ByteBuffer buffer;
private int trackCount;
private byte[] fileHeader = new byte[16];
// Simplified; use maps or classes for full properties
public STXFile(String filepath) throws IOException {
this.filepath = Paths.get(filepath);
byte[] data = Files.readAllBytes(this.filepath);
buffer = ByteBuffer.wrap(data).order(ByteOrder.LITTLE_ENDIAN);
read();
}
private void read() {
buffer.position(0);
buffer.get(fileHeader); // Full header read
trackCount = Byte.toUnsignedInt(fileHeader[10]);
System.out.println("File Header:");
System.out.printf(" ID: %s\n", new String(fileHeader, 0, 4));
System.out.printf(" Version: 0x%04X\n", Short.toUnsignedInt(buffer.getShort(4)));
System.out.printf(" Tool: 0x%04X\n", Short.toUnsignedInt(buffer.getShort(6)));
System.out.printf(" Reserved1: 0x%04X\n", Short.toUnsignedInt(buffer.getShort(8)));
System.out.printf(" Track Count: %d\n", trackCount);
System.out.printf(" Revision: 0x%02X\n", fileHeader[11]);
System.out.printf(" Reserved2: 0x%08X\n", buffer.getInt(12));
int offset = 16;
for (int t = 0; t < trackCount; t++) {
System.out.printf("\nTrack %d:\n", t);
int recordSize = buffer.getInt(offset);
System.out.printf(" Record Size: %d\n", recordSize);
offset += 4;
int fuzzyCount = buffer.getInt(offset);
System.out.printf(" Fuzzy Count: %d\n", fuzzyCount);
offset += 4;
int sectorCount = Short.toUnsignedInt(buffer.getShort(offset));
System.out.printf(" Sector Count: %d\n", sectorCount);
offset += 2;
int flags = Short.toUnsignedInt(buffer.getShort(offset));
System.out.printf(" Flags: 0x%04X\n", flags);
offset += 2;
int length = Short.toUnsignedInt(buffer.getShort(offset));
System.out.printf(" Length: %d\n", length);
offset += 2;
int number = Byte.toUnsignedInt(buffer.get(offset));
System.out.printf(" Number: %d\n", number);
offset += 1;
int type = Byte.toUnsignedInt(buffer.get(offset));
System.out.printf(" Type: 0x%02X\n", type);
offset += 1;
if ((flags & 0x01) != 0) {
for (int s = 0; s < sectorCount; s++) {
System.out.printf(" Sector %d:\n", s);
System.out.printf(" Data Offset: %d\n", buffer.getInt(offset));
offset += 4;
System.out.printf(" Bit Position: %d\n", Short.toUnsignedInt(buffer.getShort(offset)));
offset += 2;
System.out.printf(" Read Time: %d\n", Short.toUnsignedInt(buffer.getShort(offset)));
offset += 2;
System.out.printf(" Track: %d\n", Byte.toUnsignedInt(buffer.get(offset)));
offset += 1;
System.out.printf(" Head: %d\n", Byte.toUnsignedInt(buffer.get(offset)));
offset += 1;
System.out.printf(" Number: %d\n", Byte.toUnsignedInt(buffer.get(offset)));
offset += 1;
System.out.printf(" Size: %d\n", Byte.toUnsignedInt(buffer.get(offset)));
offset += 1;
System.out.printf(" CRC: 0x%04X\n", Short.toUnsignedInt(buffer.getShort(offset)));
offset += 2;
System.out.printf(" FDC Flags: 0x%02X\n", Byte.toUnsignedInt(buffer.get(offset)));
offset += 1;
System.out.printf(" Reserved: 0x%02X\n", Byte.toUnsignedInt(buffer.get(offset)));
offset += 1;
}
}
// Skip remaining (fuzzy/track data)
int parsed = 16 + ((flags & 0x01) != 0 ? 16 * sectorCount : 0);
offset += recordSize - parsed;
}
}
public void write(String newFilepath) throws IOException {
// Simplified write: copy original for now; add modifications as needed
Files.copy(filepath, Paths.get(newFilepath));
}
public void printProperties() {
// Read already prints; call read() again if needed
}
// Example usage:
// public static void main(String[] args) throws IOException {
// STXFile stx = new STXFile("example.stx");
// stx.write("example.new.stx");
// }
}
This Java class opens a .STX file, decodes and prints properties to console, and supports basic writing (copy; extend for modifications).
6. JavaScript Class for .STX File Handling
class STXFile {
constructor(buffer = null) {
this.buffer = buffer;
this.view = buffer ? new DataView(buffer) : null;
this.fileHeader = {};
this.tracks = [];
if (buffer) this.read();
}
read() {
let offset = 0;
// File Descriptor
this.fileHeader.id = String.fromCharCode(this.view.getUint8(offset++), this.view.getUint8(offset++), this.view.getUint8(offset++), this.view.getUint8(offset++));
this.fileHeader.version = this.view.getUint16(offset, true); offset += 2;
this.fileHeader.tool = this.view.getUint16(offset, true); offset += 2;
this.fileHeader.reserved1 = this.view.getUint16(offset, true); offset += 2;
this.fileHeader.trackCount = this.view.getUint8(offset++);
this.fileHeader.revision = this.view.getUint8(offset++);
this.fileHeader.reserved2 = this.view.getUint32(offset, true); offset += 4;
for (let t = 0; t < this.fileHeader.trackCount; t++) {
let track = {};
track.recordSize = this.view.getUint32(offset, true); offset += 4;
track.fuzzyCount = this.view.getUint32(offset, true); offset += 4;
track.sectorCount = this.view.getUint16(offset, true); offset += 2;
track.flags = this.view.getUint16(offset, true); offset += 2;
track.length = this.view.getUint16(offset, true); offset += 2;
track.number = this.view.getUint8(offset++);
track.type = this.view.getUint8(offset++);
track.sectors = [];
if (track.flags & 0x01) {
for (let s = 0; s < track.sectorCount; s++) {
let sector = {};
sector.dataOffset = this.view.getUint32(offset, true); offset += 4;
sector.bitPosition = this.view.getUint16(offset, true); offset += 2;
sector.readTime = this.view.getUint16(offset, true); offset += 2;
sector.track = this.view.getUint8(offset++);
sector.head = this.view.getUint8(offset++);
sector.number = this.view.getUint8(offset++);
sector.size = this.view.getUint8(offset++);
sector.crc = this.view.getUint16(offset, true); offset += 2;
sector.fdcFlags = this.view.getUint8(offset++);
sector.reserved = this.view.getUint8(offset++);
track.sectors.push(sector);
}
}
// Skip data
let parsed = 16 + ((track.flags & 0x01) ? 16 * track.sectorCount : 0);
offset += track.recordSize - parsed;
this.tracks.push(track);
}
}
printProperties() {
console.log('File Header:');
console.log(this.fileHeader);
this.tracks.forEach((track, i) => {
console.log(`\nTrack ${i}:`);
console.log(track);
});
}
write() {
// Simplified: return new buffer with headers; extend for full
const newBuffer = new ArrayBuffer(this.buffer.byteLength);
const newView = new DataView(newBuffer);
// Copy and write logic similar to read, but reverse
// Omitted for brevity; implement struct packing
return newBuffer;
}
}
// Example usage (Node.js with fs):
// const fs = require('fs');
// fs.readFile('example.stx', (err, data) => {
// const stx = new STXFile(data.buffer);
// stx.printProperties();
// });
This JS class (for browser/Node) reads from an ArrayBuffer, decodes, prints properties to console, and stubs writing.
7. C Class for .STX File Handling
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
typedef struct {
char id[4];
uint16_t version;
uint16_t tool;
uint16_t reserved1;
uint8_t trackCount;
uint8_t revision;
uint32_t reserved2;
} FileHeader;
typedef struct {
uint32_t recordSize;
uint32_t fuzzyCount;
uint16_t sectorCount;
uint16_t flags;
uint16_t length;
uint8_t number;
uint8_t type;
} TrackHeader;
typedef struct {
uint32_t dataOffset;
uint16_t bitPosition;
uint16_t readTime;
uint8_t track;
uint8_t head;
uint8_t number;
uint8_t size;
uint16_t crc;
uint8_t fdcFlags;
uint8_t reserved;
} SectorHeader;
typedef struct {
FileHeader fileHeader;
TrackHeader* tracks;
SectorHeader** sectors; // Array of pointers to sector arrays
} STXFile;
STXFile* stx_open(const char* filepath) {
FILE* f = fopen(filepath, "rb");
if (!f) return NULL;
fseek(f, 0, SEEK_END);
long size = ftell(f);
fseek(f, 0, SEEK_SET);
uint8_t* data = malloc(size);
fread(data, 1, size, f);
fclose(f);
STXFile* stx = malloc(sizeof(STXFile));
uint8_t* ptr = data;
memcpy(stx->fileHeader.id, ptr, 4); ptr += 4;
stx->fileHeader.version = *(uint16_t*)ptr; ptr += 2;
stx->fileHeader.tool = *(uint16_t*)ptr; ptr += 2;
stx->fileHeader.reserved1 = *(uint16_t*)ptr; ptr += 2;
stx->fileHeader.trackCount = *ptr++;
stx->fileHeader.revision = *ptr++;
stx->fileHeader.reserved2 = *(uint32_t*)ptr; ptr += 4;
stx->tracks = malloc(stx->fileHeader.trackCount * sizeof(TrackHeader));
stx->sectors = malloc(stx->fileHeader.trackCount * sizeof(SectorHeader*));
for (uint8_t t = 0; t < stx->fileHeader.trackCount; t++) {
stx->tracks[t].recordSize = *(uint32_t*)ptr; ptr += 4;
stx->tracks[t].fuzzyCount = *(uint32_t*)ptr; ptr += 4;
stx->tracks[t].sectorCount = *(uint16_t*)ptr; ptr += 2;
stx->tracks[t].flags = *(uint16_t*)ptr; ptr += 2;
stx->tracks[t].length = *(uint16_t*)ptr; ptr += 2;
stx->tracks[t].number = *ptr++;
stx->tracks[t].type = *ptr++;
if (stx->tracks[t].flags & 0x01) {
stx->sectors[t] = malloc(stx->tracks[t].sectorCount * sizeof(SectorHeader));
for (uint16_t s = 0; s < stx->tracks[t].sectorCount; s++) {
stx->sectors[t][s].dataOffset = *(uint32_t*)ptr; ptr += 4;
stx->sectors[t][s].bitPosition = *(uint16_t*)ptr; ptr += 2;
stx->sectors[t][s].readTime = *(uint16_t*)ptr; ptr += 2;
stx->sectors[t][s].track = *ptr++;
stx->sectors[t][s].head = *ptr++;
stx->sectors[t][s].number = *ptr++;
stx->sectors[t][s].size = *ptr++;
stx->sectors[t][s].crc = *(uint16_t*)ptr; ptr += 2;
stx->sectors[t][s].fdcFlags = *ptr++;
stx->sectors[t][s].reserved = *ptr++;
}
} else {
stx->sectors[t] = NULL;
}
// Skip data
uint32_t parsed = 16 + ((stx->tracks[t].flags & 0x01) ? 16 * stx->tracks[t].sectorCount : 0);
ptr += stx->tracks[t].recordSize - parsed;
}
free(data);
return stx;
}
void stx_print(STXFile* stx) {
printf("File Header:\n");
printf(" ID: %.4s\n", stx->fileHeader.id);
printf(" Version: 0x%04X\n", stx->fileHeader.version);
printf(" Tool: 0x%04X\n", stx->fileHeader.tool);
printf(" Reserved1: 0x%04X\n", stx->fileHeader.reserved1);
printf(" Track Count: %u\n", stx->fileHeader.trackCount);
printf(" Revision: 0x%02X\n", stx->fileHeader.revision);
printf(" Reserved2: 0x%08X\n", stx->fileHeader.reserved2);
for (uint8_t t = 0; t < stx->fileHeader.trackCount; t++) {
printf("\nTrack %u:\n", t);
printf(" Record Size: %u\n", stx->tracks[t].recordSize);
printf(" Fuzzy Count: %u\n", stx->tracks[t].fuzzyCount);
printf(" Sector Count: %u\n", stx->tracks[t].sectorCount);
printf(" Flags: 0x%04X\n", stx->tracks[t].flags);
printf(" Length: %u\n", stx->tracks[t].length);
printf(" Number: %u\n", stx->tracks[t].number);
printf(" Type: 0x%02X\n", stx->tracks[t].type);
if (stx->sectors[t]) {
for (uint16_t s = 0; s < stx->tracks[t].sectorCount; s++) {
printf(" Sector %u:\n", s);
printf(" Data Offset: %u\n", stx->sectors[t][s].dataOffset);
printf(" Bit Position: %u\n", stx->sectors[t][s].bitPosition);
printf(" Read Time: %u\n", stx->sectors[t][s].readTime);
printf(" Track: %u\n", stx->sectors[t][s].track);
printf(" Head: %u\n", stx->sectors[t][s].head);
printf(" Number: %u\n", stx->sectors[t][s].number);
printf(" Size: %u\n", stx->sectors[t][s].size);
printf(" CRC: 0x%04X\n", stx->sectors[t][s].crc);
printf(" FDC Flags: 0x%02X\n", stx->sectors[t][s].fdcFlags);
printf(" Reserved: 0x%02X\n", stx->sectors[t][s].reserved);
}
}
}
}
void stx_write(STXFile* stx, const char* newFilepath) {
// Simplified: write headers; extend for data
FILE* f = fopen(newFilepath, "wb");
if (!f) return;
fwrite(stx->fileHeader.id, 1, 4, f);
fwrite(&stx->fileHeader.version, 2, 1, f);
fwrite(&stx->fileHeader.tool, 2, 1, f);
fwrite(&stx->fileHeader.reserved1, 2, 1, f);
fwrite(&stx->fileHeader.trackCount, 1, 1, f);
fwrite(&stx->fileHeader.revision, 1, 1, f);
fwrite(&stx->fileHeader.reserved2, 4, 1, f);
for (uint8_t t = 0; t < stx->fileHeader.trackCount; t++) {
fwrite(&stx->tracks[t].recordSize, 4, 1, f);
fwrite(&stx->tracks[t].fuzzyCount, 4, 1, f);
fwrite(&stx->tracks[t].sectorCount, 2, 1, f);
fwrite(&stx->tracks[t].flags, 2, 1, f);
fwrite(&stx->tracks[t].length, 2, 1, f);
fwrite(&stx->tracks[t].number, 1, 1, f);
fwrite(&stx->tracks[t].type, 1, 1, f);
if (stx->sectors[t]) {
for (uint16_t s = 0; s < stx->tracks[t].sectorCount; s++) {
fwrite(&stx->sectors[t][s].dataOffset, 4, 1, f);
fwrite(&stx->sectors[t][s].bitPosition, 2, 1, f);
fwrite(&stx->sectors[t][s].readTime, 2, 1, f);
fwrite(&stx->sectors[t][s].track, 1, 1, f);
fwrite(&stx->sectors[t][s].head, 1, 1, f);
fwrite(&stx->sectors[t][s].number, 1, 1, f);
fwrite(&stx->sectors[t][s].size, 1, 1, f);
fwrite(&stx->sectors[t][s].crc, 2, 1, f);
fwrite(&stx->sectors[t][s].fdcFlags, 1, 1, f);
fwrite(&stx->sectors[t][s].reserved, 1, 1, f);
}
}
// Add data write if needed
}
fclose(f);
}
void stx_close(STXFile* stx) {
for (uint8_t t = 0; t < stx->fileHeader.trackCount; t++) {
if (stx->sectors[t]) free(stx->sectors[t]);
}
free(stx->sectors);
free(stx->tracks);
free(stx);
}
// Example usage:
// int main() {
// STXFile* stx = stx_open("example.stx");
// stx_print(stx);
// stx_write(stx, "example.new.stx");
// stx_close(stx);
// return 0;
// }
This C struct-based "class" opens a .STX file, decodes, prints properties to console, and supports basic writing (headers; extend for full data).