Back to home page

DOS ain't dead

Forum index page

Log in | Register

Search:  
Back to the forum
Board view  Mix view

trip report: Tiny C Compiler 0.9.27 (Miscellaneous)

posted by Rugxulo Homepage, Usono, 05.02.2026, 23:09

> There are 128 bytes set aside in the PSP for the command-tail. The first
> byte (at PSP:80h]) is the size (number of bytes) in the command-tail, and
> the last byte of the command-tail is always an ASCII 13 (Carriage Return or
> CR). That's why the command-tail size is limited to 126 bytes. In my
> programs (usually written in ASM), I normally ignore the size and just look
> for the CR.
Not sure the exact limit. Maybe you mean minus the length byte and actual ending CR. I know the DOS4GW extender couldn't handle longer than 126 or so. I had thought I read %CMDLINE% was only used when 7Fh or 80h (Borland??) length was found. But yeah, it's a Win9x feature, and FreeCOM (FreeDOS) supports it, so does DJGPP.

FYI, the core OpenWatcom tools should support longer cmdlines via env. var. if you put a '*' (asterisk) before them in your makefiles (using Wmake).

Post reply
 

Complete thread:

Back to the forum
Board view  Mix view
23154 Postings in 2179 Threads, 404 registered users (0 online)
DOS ain't dead | Admin contact
RSS Feed
powered by my little forum