Thank you for quick respond,
I'm not just following you - pls take my excuse 😕 .
Did I understand you correctly -there is still possibility increase EMS (in my ThinkPad machine) by using some settings? All what I know is following - all attempts to get that full functional DOS application work in those machines are failed (IT team). 😢 This application has been modified to make it work under XP with restricted options (0 EMS which is the major case here). But there isn't communication problems even without using real COMport.The solutions known up to date:
1.Kill all USB ports - and in this way release EMS memory resourses
2.Use Virtual PC and run real MS DOS (with hard drive partition etc)
So, in this case this DOS application works fine.
3. Use this DOS based software in Windows (0 EMS, 1 software segment working at the time) - no communication problems either by using docking station COMport or PCMCI-RS232 converter plus attached RS232-RS485
That is why I was trying to use DOSBOX to avoid all these complications. Everybody impressed! No problem with Editor and Debbuger functions enumerous segments could be opened at the same time and edited. But it seems to me COMport from ThinkPad Docking station couldn't be used in DOSBOX like realcomport (under Virtual PC the same COM port with the same DOS application works fine). Also,looks like I can't use PCMCI type RS232 converter. it seems to get DOSBOX work the only way to buy laptop with built in DB9 RS232 (smth. from Dell,Toshiba, buisness family laptops) 🤣
Please advise,
Thanks again