I experimented with JEMMEX settings, but unfortunately even
DEVICE=C:\FDOS\BIN\JEMMEX.EXE X=A000-FFFF NOHI NOVME NOINVLPG
in FDCONFIG.SYS leads to a crash of the FreeDOS 1.1 guest in a Windows 8 host.
On my Mac there’s no such problem.
The JEMMEX documentation says about the settings above:
"This is the safest combination. If this doesn't work, Jemm most likely isn't
compatible with the current DOS/BIOS.“
VirtualBox is the newest version 5.0.14.
For my VirtualBox image with network ("FreeDOS 1.1net") I created a new
version, which uses the old HIMEM.EXE and EMM386.EXE couple from FreeDOS 1.0.
They seem to work fine. If anyone wants to try it out:
https://www.lazybrowndog.net/freedos/virtualbox/downloads/vdi/FreeDOS1.1net-test.zip
<https://www.lazybrowndog.net/freedos/virtualbox/downloads/vdi/FreeDOS1.1net-test.zip>
Installation is explained here:
https://www.lazybrowndog.net/freedos/virtualbox/
<https://www.lazybrowndog.net/freedos/virtualbox/downloads/vdi/FreeDOS1.1net-test.zip>
Not using UMBs at all isn’t such a good idea. With HIMEM.EXE and EMM386.EXE I
get 509K free conventional memory after loading all the drivers for MS Client
and TCP/IP. Without UMBs I loose another 59K so I think some programs wouldn’t
even start.
Thanks!
Ulrich
> Am 13.01.2016 um 00:49 schrieb Ulrich Hansen <my.gr...@mailbox.org>:
>
> I have heard about this problem from some users of the FreeDOS VirtualBox
> images at
> https://www.lazybrowndog.net/freedos/virtualbox/
> <https://www.lazybrowndog.net/freedos/virtualbox/>
>
> As far as I found out, "Bad or missing command interpreter" doesn’t
> necessarily mean COMMAND.COM <http://command.com/> doesn’t exist. It can also
> mean it can’t be loaded. This seems to be an issue of JEMMEX on some machines.
>
> You could experiment with JEMMEX settings. Others here know a lot more about
> that and perhaps have the time to help you.
>
> Another possibility: If you use FreeDOS for non-commercial purposes, it would
> be legal to use the memory manager of Calderas DR-DOS instead. The full
> DR-DOS can be found here ftp://ftp.uni-bayreuth.de/pub/pc/caldera
> <ftp://ftp.uni-bayreuth.de/pub/pc/caldera> with all the necessary notes and
> licensing information. Please read it. For your convenience the driver alone
> can be downloaded here: https://www.lazybrowndog.net/freedos/dremm386.zip
> <https://www.lazybrowndog.net/freedos/dremm386.zip>.
>
> Unzip it to a folder like C:\UTIL\DRDOS.
>
> Look for a line similar to this one in C:\FDCONFIG.SYS:
>
> 15678?DEVICE=C:\FDOS\BIN\JEMMEX.EXE NOEMS X=TEST I=TEST NOVME NOINVLPG
>
> and replace it by this one
>
> 15678?DEVICE=C:\UTIL\DRDOS\DREMM386.EXE NOEMS EXCLUDE=D000-D7FF
>
> And in C:\AUTOEXEC.BAT after the following line
>
> IF „%config%“==„4“ goto end
>
> add this line:
>
> C:\UTIL\DRDOS\DREMM386.EXE PIC=ON
>
> Please give some feedback if this works for you.
>
> Note: DR-DOS EMM386 doesn’t have all the features of JEMMEX so you need to
> test if your programs work with this driver. Try also different settings to
> get more free memory. I know that this is not a perfect solution.
>
> Ulrich
>
>
>
>> Am 07.01.2016 um 00:15 schrieb caswellrie...@gmail.com
>> <mailto:caswellrie...@gmail.com>:
>>
>> Hello! Basically, my issue is summarized in the title.
>>
>> I have installed a FreeDOS 1.1 install as a VirtualBox guest, but when I
>> boot I get the error “Bad or missing command interpreter” and then a prompt
>> to enter the path to COMMAND.COM <http://command.com/>. However, when this
>> prompt is issued, the system stops accepting keyboard input. The keyboard
>> works before this prompt. Possibly related, but I had to try to install
>> from the CD image twice, because the first time the installer froze after I
>> selected my language/keyboard layout.
>>
>> Any and all help would be greatly appreciated.
>>
>> Thanks, Matt
>>
>> Sent from Windows Mail
>>
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