🚀 go-pugleaf

sas...@unx.sas.com (Bill Arnette) writes:

>jmw...@is2.nyu.edu   (Jeff Williams) writes:
>
> [ snip ]

>>If you like, I'll repost his original message.  He did ask a simple question.
>>The one statement he made was "As I understand it, Windows 95 cannot
>>run multiple configurations in concurrently running DOS sessions" or something
>>to that effect.  There STILL has not been anyone that's given any new
>>information regarding this (it's possible this has been updated in the
>>latest version of Win95, but the information I have also says that Win95
>>runs every concurrently running DOS program in a single VM).  You started

>I though I could stay out of this debate but...

>>From the Windows 95 Resource Kit on the build 445 CD-ROM:

>Application Support/
> Technical notes on application support/
>  Support for MS-DOS Based applications:

>   "As with Windows 3.1, each MS-DOS - base application runs in its own
>   DOS virtual machine (VM), which allows multiple 8086-compatible sessions
>   to run on the CPU, which in turn allows existing MS-DOS - based
>   applications to run preemptively with the rest of the system."


It was pointed out to me that the above quote does not answer the actual
question posed, which is true.  I have looked all over the resource kit 
documentation and have found nothing that states that "you may run 
several concurrent DOS VMs, each with it's own DOS settings."  

However, here is an exceprt from the mem /c output in several differently 
configured DOS sessions running at the same time on a IBM PS/2 Model 90 
w/32M RAM :

  Session with Auto EMS:

    Total Expanded (EMS)                  32,964,608  (31M)
    Free Expanded (EMS)                   16,777,216  (16M)
    Largest executable program size          614,000 (600K)
    Largest free upper memory block                0   (0K)
    MS-DOS is resident in the high memory area.

  Session with no EMS

    Largest executable program size          614,000 (600K)
    Largest free upper memory block                0   (0K)
    MS-DOS is resident in the high memory area.
       
  Session with Auto EMS and 280K Conventional

    Total Expanded (EMS)                  32,964,608  (31M)
    Free Expanded (EMS)                   16,777,216  (16M)
    Largest executable program size          280,176 (274K)
    Largest free upper memory block            2,112   (2K)
    MS-DOS is resident in the high memory area.

I tried to come up with actual documentation stating exactly the answer to
the question, but in the absence of that, I hope the results of this 
experiment do answer the question.

It is true that you cannot specify FILE= and BUFFERS= or any other
options that you would specify in a CONFIG.SYS file.  But you can specify a
.BAT file to be run before your application much as an AUTOEXEC.BAT file
might be run.

Cheers,
Bill 

--
Bill Arnette                      sas...@unx.sas.com
Portable Debugger Development     ...!mcnc!sas!saswta
SAS Institute Inc.                (919)677-8000 x6193  
SAS Campus Drive - R2275          (919)677-4444 (fax)  
Cary, NC 27513