In CONFIG.SYS :
Download MOUSE.COM or CTMOUSE.EXE (free, open-source). Load it high: LH C:\DOS\CTMOUSE.EXE . ms dos 622 iso work
DEVICE=C:\DOS\HIMEM.SYS DEVICE=C:\DOS\EMM386.EXE NOEMS DEVICEHIGH=C:\CDROM\OAKCDROM.SYS /D:MSCD001 In AUTOEXEC.BAT : In CONFIG
LH C:\DOS\MSCDEX.EXE /D:MSCD001 /L:D Use MEMMAKER to automatically optimize conventional memory (the first 640KB). Type MEMMAKER at the command line and follow the prompts. ms dos 622 iso work
However, getting this legacy operating system to run on modern or even period-appropriate hardware presents a unique challenge: