Oh! I should have clarified. I am not using the X windows mode of
dosemu, I am running it in a text mode terminal. When you run in a
terminal, it is not supposed to allocate the VGA graphics areas (leaving
them available for $_dosmem)
That is consistent with the behavior of real DOS. If you boot with a
monochrome card (no VGA) you have access to more memory, or if you used
the correct emm386 options you could disable your VGA card's graphics
modes and get access to that memory.
** Description changed:
Binary package hint: dosemu
Description:Ubuntu 8.04.1
Release:8.04
Package version: dosemu 1.4.0+svn.1828-1
Dosemu has an option that controls available real-mode memory. Edit
/etc/dosemu/dosemu.conf and you will find:
# $_dosmem = (640)
Uncomment this line, and slightly increase the number. 768 is the
highest valid value, but 641 is sufficient to trigger this crash.
- Run dosemu, and it will crash immediately with no error message.
+ Run dosemu (in console mode from a terminal, NOT the graphical X mode),
+ and it will crash immediately with no error message.
This error does not occur when I downgrade to the older 1.2.2-9
packages. In my own configuration I use $_dosmem = (704) and it works
perfectly in the older version.
I have already worked around the LOWRAM mmap segmentation fault reported
in bug 216398
--
dosemu crashes if $_dosmem setting in dosemu.conf is changed
https://bugs.launchpad.net/bugs/279923
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