ah JEMM EMS stuff
ok you want to have an EMS pageframe in the UMA part of the memory for
EMS to work on 386+ systems (your virtual machine)
on regular 286- systems EMS is on a CARD like the lo-tech 2mb EMS card
(works so well! <3)
i usually suggest D000-DFFF for the page frame
but double check with a program like umascan.com
https://files.mpoli.fi/pub/unpacked/software/programm/asm/dosutil.zip/
to set up page frame for EMS u can use the I=D000-DFFF for an example or
u can try I=TEST
these options can be set with the
device=C:\freedos\bin\jemmex.exe I=D000-DFFF EMS
line in C:\fdconfig.sys
this kind of 386 EMS set up tends to be a pain on newer than 1994
systems because uma is in use with additional roms and such.
if you need help feel free to email me.
send me your fdconfig.sys! :D
On 12/23/25 8:03 AM, Franco Martelli via Freedos-user wrote:
Howdy,
my goal is to run the DOS game "Space Ace" ¹ on FreeDOS 1.4 inside a
VM in VirtualBox 7.2.4 as host in Debian Trixie 13.2. The game comes
with a 640MB CDROM that it's seen as drive D: by FreeDOS. The
executable "spaceace.exe" starts but after the "Configure pane" it
freeze when it attempts to load the first scenario. I've to close the
VirtualBox's FreeDOS window because no key sequence (ESC,Ctrl-C) works
in order to return to the FreeDOS prompt.
The executable "spaceace.exe" allows to run a trial of the game that
it starts (with no sound) but after a while the screen gets
corrupted/scrambled and then it freezes.
Since the game uses emm memory I guess a misconfiguration of JEMM386
but I don't know why the trial runs with no sound. What can I try?
Thanks in advance, kind regards.
¹ https://en.wikipedia.org/wiki/Space_Ace
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