Author: Robert Hyatt
Date: 15:03:46 02/03/99
Go up one level in this thread
On February 03, 1999 at 12:54:24, Ed Schröder wrote:
>>Posted by Robert Hyatt on February 03, 1999 at 09:55:20:
>
>>unless something has changed drastically, it doesn't do that. It _allows_ a
>>program to access memory beyond 640K, but it doesn't 'protect' it. Otherwise
>>you couldn't run something like this and hang the system:
>>
>> main() {
>> int a[1000];
>> int i;
>> for (i=i;i<10000000;i++) a[i]=0;
>> }
>
>>Dos has never had the concept of 'a task' which is why "TSR (terminate and
>>stay resident)" programs were developed. They sit in memory, can write >_anywhere_ and you don't ever know unless they blow you up...
>
>IMO a TSR program isn't able to write (or read) above 1 Mb. Is this
>a correct view?
no. Any 'program' running under dos can access any byte of memory in the
machine. which can be a problem. Normally TSR programs don't bother extended
memory because they have no idea what is used and what is free, but they _can_
poke around up there if they want... and some do...
>
>
>>>Rebel10.0c (with auto232) is currently running on 2 autoplayer pairs
>>>under Win98 and a third autoplayer pair is running under Win95. No
>>>incompatible problems noticed sofar.
>
>
>>I assume your autoplayer 'bug' was not under windows? Because if it was,
>>then this changes things. The only thing that can access your memory is part
>>of _your_ program (including the auto232 driver code you include, of course,
>>but 'other programs/processes' can't touch you in win98. Only things that are
>>part of your code..
>
>No. I always have tested outside Windows using a clean boot without
>any memory managers. Now I have started auto232 from the DOS-box
>within Win98. I wonder if this is good enough to be safe as I know
>HIMEM.SYS behaves different in the DOS-box than if you launch a
>program from the desktop.
>
>Ed
That I don't know. The only windows 'box' I use is the box it came in where
it stays and never makes it onto my hard drive. :)
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