[rep_lodsb]

The article is very vague about which emulator and COMMAND.COM it is about, and if they're integrated with each other. Can't be DOSBox, since it handles it correctly:

    C:\> echo AB> foo.txt
    C:\> echo CD>> foo.txt
    C:\> type foo.txt
    AB
    CD

(Note that echo adds a newline, same as on real DOS, or even UNIX without "-n". This other shell doesn't for some reason.)

The "real" COMMAND.COM, and all other essential parts of MS-/PC-/DR-DOS, have always been written in asm, where none of this libc nonsense matters.

Also it annoys me greatly when people talk about "the C Library" as if it exists in some Platonic realm, and is essential to all software ever written.