Back to home page

DOS ain't dead

Forum index page

Log in | Register

Back to the forum
Board view  Mix view

Using Multiple CPU Cores in DOS? (Miscellaneous)

posted by bretjohn(R) Homepage E-mail, Rio Rancho, NM, 15.09.2011, 18:24

> in protected mode, this very much depends on the DPMI host, as you are
> accessing 'memory' that does not exist, so the DPMI host has not
> necessarily page table descriptors for this memory allocated, and must
> somehow emulate that. I remember that FD-EMM386 was modified to handle
> this, but forgot the details

I'm not using DPMI, and MMIO is "real" memory -- it's just not RAM. Also AFAIK, you can't assign an XMS handle to a specific known physical memory address above 1 MB, but maybe you know something I don't. XMS moves won't work in this situation unless you can do that. Plus, this needs to work even if XMS isn't available.

> P.P.S: use ftp://www.drivesnapshot.de/freedos/himem.exe and run
> HIMEM /TEST
> t measure these numbers;

The site seems to need a non-anonymous login and password.

 

Complete thread:

Back to the forum
Board view  Mix view
15196 Postings in 1365 Threads, 250 registered users, 18 users online (0 registered, 18 guests)
DOS ain't dead | Admin contact
RSS Feed
powered by my little forum