S3 file extension - Motorola S-record file
What is s3 file? How to open s3 files?
File type specification:
The S3 file extension is related to Motorola devices. Motorola S-record file consists of a sequence of specially formatted ASCII character strings. S-record will be less than or equal to 78 bytes in length.
The S-Record format was designed to be used loading the data from the host computer to the receiving computer. It is designed to be visually readable and even though it looks like mumble jumble it is very readable once you know how.