D64
application/octet-stream
Magic Bytes
Offset: 0
A0 32 41 A0 A0 A0
The D64 disk image format is a legacy binary container representing a Commodore 1541 single-sided floppy disk, developed by the emulation community for Commodore 64 preservation. It is primarily used to run vintage games, demos, and utilities on modern hardware through specialized emulators or physical disk drive replacements. Storing raw track and sector data from obsolete media, the format poses minimal security risk and contains no executable code for modern operating systems.
Validation Code
How to validate .d64 files in Python
Python
def is_d64(file_path: str) -> bool:
"""Check if file is a valid D64 by magic bytes."""
signature = bytes([0xA0, 0x32, 0x41, 0xA0, 0xA0, 0xA0])
with open(file_path, "rb") as f:
return f.read(6) == signatureHow to validate .d64 files in Node.js
Node.js
function isD64(buffer: Buffer): boolean {
const signature = Buffer.from([0xA0, 0x32, 0x41, 0xA0, 0xA0, 0xA0]);
return buffer.subarray(0, 6).equals(signature);
}
Go
func IsD64(data []byte) bool {
signature := []byte{0xA0, 0x32, 0x41, 0xA0, 0xA0, 0xA0}
if len(data) < 6 {
return false
}
return bytes.Equal(data[:6], signature)
}API Endpoint
GET
/api/v1/d64
curl https://filesignature.org/api/v1/d64