Dosbox 0.73 always crashes in Settlers (the original) when I defeat the computer in a battle. This happens every time I have tried it, with this error (normal core): Exit to error: CPU:66:GRP5:Illegal call 7. With dynamic core, the error is Dyncore: illegal option in opcode 0xff.

I installed the game within dosbox. This is what I have tried:

disabling sound in dosbox (sbtype=none)
disabling sound in the in-game installer
opengl and direct3d graphics
disabling ems/xms
using fixed cycles (10000)
vesa_nolfb and vgaonly
using loadfix

The only option that made any difference was disabling sound in dosbox. When I did that, the game hung and the graphics garbled when I defeated an enemy, but dosbox itself did not crash and there was no error message.

Yes, I read the readme! I am running a 1.7Ghz Pentium M laptop with 2GB of RAM, a Radeon 9700 mobility and on-board realtek soundcard. Any ideas how I can fix this? Thanks.