6f9648672e
Some ancient NE programs set exMinAlloc to 0xffff to signify that they should not be run as normal MZ programs at all: 00000000 4d 5a 40 00 01 00 00 00 04 00 ff ff ff ff 00 00 00000010 00 00 00 00 00 00 00 00 40 00 00 00 00 00 00 00 00000020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00000030 00 00 00 00 00 00 00 00 00 00 00 00 40 00 00 00 00000040 4e 45 04 00 9b 00 07 00 00 00 00 00 06 40 02 00 ... The kernel should reject these programs, rather than try to run them (and crash the system).
fdkernel
FreeDOS kernel - branch from 2042 SVN 0xFD kernel
The FreeDOS kernel implements the core MS/PC-DOS (R) compatible functions. It is derived from Pat Villani's DOS-C kernel and released under the GPL v2. Please see http://www.freedos.org/ for more details about the FreeDOS (TM) Project. Compiled kernels ready to use (just copy kernel.sys over an existing install) are available at http://www.fdos.org/kernel/testing/git/ - also available are the source archive and fdpkg compatible packages.
This version of the kernel is intended only for 8086+ or 80386+ IBM compatible computers in continuation of the goals of the FreeDOS Project. Please see http://www.fdos.org/kernel for my 0xDC kernel that is work on merging back in some of the original portability aspects and other supported features at the cost of some compatibility with older hardware/software.
Please feel free to email me - PerditionC@gmail.com Jan 2014