Re: Software for MS-DOS 1.25

From: Ruud_at_Baltissen.org
Date: Sun, 15 Oct 2017 21:39:13 +0200
Message-ID: <59E3B961.10906.1A20EB8F@Ruud.Baltissen.org>
Hallo Michał,


> > It does! Completely forgot about that. Good idea!

I Installed FreeDOS on a XT today. But it took some time because I 
first had to find a better system so I could install from CD. Having 
installed FreeDOS on its harddisk, I could create a bootable floppy 
that I could use on its turn to install it on my XT.


> FreeDOS hardware compatibility page does not look promising.

FreeDOS expects a 100% IBM compatible PC. And that means it doesn't 
need an IO.SYS equivalent and puts the rest in KERNEL.SYS.

BUT.....: it is open source and THAT enables one to adapt it use it 
with the CBM-II. 

Just pops up: how do all those system programs, like FDISK and 
DEBUG, write to the screen? INT 10h or direct mmory access? Most 
things are written C and so it is the compiler that decides that. I 
think I have to decrease my enthousiasm about FreeDOS a bit.


> say that it needs "as little as" 640 kB memory 

FreeDOS will run on a 256 KB machine, no problem. The problem is the 
left over free memory: you don't have enough room to run any decent 
progam. 

But you will have, more or less, the same problem with DOS 3.3. 


--
   
Kind regards / Met vriendelijke groet, Ruud Baltissen
www.Baltissen.org







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