Basic DescriptionThe SYS format is basically a subset of the BMP format , where only certain combinations are allowed. There are a few weird aspects to this format.
This is the format of the LOGO.SYS, LOGOW.SYS and LOGOS.SYS files of Windows 95.
It does not apply to any other file!
Other files may be binary code (KEYB.SYS) or ASCII (CONFIG.SYS) or actually anything else.