Back to home page

DOS ain't dead

Forum index page

Log in | Register

Search:  
Back to the forum
Board view  Mix view

I made my own DOS implementation (Announce)

posted by ecm Homepage E-mail, Düsseldorf, Germany, 22.03.2024, 00:21

> > I'm not certain about *most* KEYB implementations, but I am certain that
> > MKEYB does not rely on any MS-DOS feature, but interacts entirely with
> the
> > BIOS.
> > and I think KEYB behaves (in this respect) identical.
>
> MKEYB.C, line 76.
That's https://github.com/davidebreso/mkeyb/blob/518d24d578dcb094b7f74800cd982bb4e4b7178b/mkeyb.c#L76

> It changes DOS's internal undocumented memory allocation struct. That is
> why it crashes. It assumes that the underlying operating system is MS-DOS.
>
> Whoever wrote that should go fix their program. Those memory allocation
> structs are not identical between different DOS implementations.
Actually they are identical among compatible DOS systems. The system call services with ax = 5800h to 5803h on int 21h are not "internal" to DOS.

---
l

Post reply
 

Complete thread:

Back to the forum
Board view  Mix view
22049 Postings in 2034 Threads, 396 registered users, 96 users online (0 registered, 96 guests)
DOS ain't dead | Admin contact
RSS Feed
powered by my little forum