Back to home page

DOS ain't dead

Forum index page

Log in | Register

Search:  
Back to the forum
Board view  Mix view

non-DOS (yet): an interesting project for x86-64 (Miscellaneous)

posted by tkchia Homepage, 24.01.2021, 03:59
(edited by tkchia on 24.01.2021, 04:28)

Hello glennmcc,

> > MS-DOS does not have a syscall() function (or a syscall(2) man page)
> which
> > one can "simply" port to a different (sub)architecture.
> Following that line of logic, it does not make very much sense to make a
> 32bit
> DOS kernel (which if I recall correctly has been done a couple of times),
The "32-bit DOS kernels" have always been meant to run 16-bit programs. Only the system internals are 32-bit. This is, guess what, similar with what I am trying to do with x86-64 UEFI.

(If a "32-bit DOS kernel" cannot run existing programs, even on an Intel CPU, then there is not much reason for calling it DOS, except for marketing.)

> nor does it make very much sense to make a 64bit Linux kernel. ;-)
If you compare how system calls are described in Linux man pages (hint: the syscall(2) man page, and friends), and how system calls are described in Ralf Brown's Interrupt List, you will see the huge and obvious difference.

But of course if you see everything as just a huge sea of ones and zeros, then there is no difference.

Thank you!

---
https://gitlab.com/tkchia · https://codeberg.org/tkchia · 😴 "MOV AX,0D500H+CMOS_REG_D+NMI"

Post reply
 

Complete thread:

Back to the forum
Board view  Mix view
22049 Postings in 2034 Threads, 396 registered users, 64 users online (0 registered, 64 guests)
DOS ain't dead | Admin contact
RSS Feed
powered by my little forum