[syslinux] syslinux.com 6.02 Invalid Opcode under FreeDOS

[Ady]

> _ Vbox 4.2.18 VM booted with FreeDOS floppy, kernel 2041, no 
> config.sys, no autoexec.bat, no TSR's, no memory managers.
> 
> _ The booting floppy includes syslinux.com 6.02.
> 
> _ Two HDD images attached to the VM, MBR + 1 FAT16 formatted 
> partition each.
> 
> Executing syslinux.com -i c: (or "d:") results in the following 
> error:
> "Invalid Opcode at AD04 5080 0206 5080 2021 3666 FFFD 0083 0000 5208 
> 0000 0083 0000".
> 
> The 2 relevant files (ldlinux.sys and ldlinux.c32) are copied to the 
> destination volume anyway. The resulting volume is still not 
> bootable.
> 
> A similar scenario, but with memory manager(s) will fail with 
> different errors.
> 
 
Testing with VirtualBox 4.2.18 (I'm not ready to update to 4.3 yet) 
and using the same method described in the previous email, when 
executing
 "syslinux.com -i c:" 
 I get the following results:
_ 6.02-pre06/11/12/13 OK.
_ 6.02-pre14 and 6.02-pre15 generate a "guru mediation" crash of the 
VM (Vbox itself is OK).
_ 6.02-pre16 and 6.02 final generate an "Invalid Opcode" error in 
FreeDOS (as described in previous email); the VM and Vbox are OK (no 
crash). As I said before, with FreeDOS' memory managers, the 
resulting error is different.

TIA,
Ady.