Yep, core=dynamic, maybe set cycles to a high value, instead of max. Offtopic: Also I see some big no nos in your conf MOUNT C C:\ SET PATH=C:\AVC\BIN;c:\avc\avs;c:\WINDOWS\SYSTEM;c:\WINDOWS\SYSTEM32 SET TEMP=C:\WINDOWS\TEMP SET TMP=C:\WINDOWS\TEMP SET AVOCET=C:\AVC\ mode con codepage prepare=((850 …

I have an Avocet old compiler , DOS version, which does not run on dos windows in WinXP, but runs fine with DOSbox 0,70 on winXP, but very slow : a compilation which takes les than 1 second in a W98 window takes 25s on the same computer (I have dual boot) in dosbox with windows XP. The computer is …