E?? / F??

Status

What it is

Some embroidery format lists describe numbered Eltac and Forton file families where the first letter is followed by version or machine digits.

Satin Studio behavior

Satin Studio documents this format for identification and inspection. It does not open or export the file.

Versions and variants

The suffix digits may be part of the format family. Treat each observed extension as a dialect until proven otherwise.

File identification notes

Reported details:

• Eltac .e??: 256-byte header with triplet-coded DST-style encoding.
• Forton .f??: 256-byte header with unsigned x, y, control-style encoding.

Observed structure notes

• Observed Eltac/Forton leads use fixed headers plus compact stitch records, but the numbered extensions are not one proven format.
• Observed .exy-style files use Eltac-specific records; observed .fxy-style files follow unsigned x, y, control-style movement. Each suffix still needs separate validation.

Structure sketch

The numbered E/F families should be tracked as separate dialects.

struct EltacENumberedFile<'a> {
    header: [u8; 256],                 // reported fixed header
    dst_style_triplets: &'a [[u8; 3]], // reported triplet-coded DST-style body
}

struct FortonFNumberedFile<'a> {
    header: [u8; 256],
    records: &'a [UnsignedTripletRecord],
}

struct UnsignedTripletRecord {
    x: u8,
    y: u8,
    control: u8,
}

Compatibility evidence

The notes above help identify and inspect the format; they do not imply import or export support. Keep the original file and record the machine and software that produced it.