I made a note of this on my web zone last night, but the boot disk for my #Telebit #NetBlazer contains a file called TELEBIT.SYS, which seems to be a COM executable (single segment of executable code). A strings dump includes references to Protected Mode and a "FRED loader." There is also a giant binary blob named FRED, which may be related to this.

I should probably run this through ghidra or something at some point and see if I can get an idea of how it's talking to the serial ports.

Started a rough page on the #Telebit #NetBlazer PN2 #Dialup #VintageComputing router: https://indigoparadox.zone/devices/netblazer.html

Not much useful there yet, aside from some photos and a link to the boot disk that came with mine if someone is looking for one.

I guess those are somewhat useful, but I would like to figure out the executable format for the modules in the OS at some point. file calls them COM files, which would make sense, but they do not seem to be that on closer inspection!

From when "dial-up internetworking" was a thing.

#telebit
#netblazer