China DOS Union

Often see such batch processing statements:
lh c:\dos\doskey.com 　　
But don't know what the meaning of lh in front is. Please have an expert explain it, okay?
Although the question is a bit naive, I can't pretend to know if I don't understand..>:　　　　　　　　　　　　

I'm even worse than you because I've never even seen it.

lh is a command in DOS (CMD in XP is invalid) to add a program to the upper memory, thus saving the basic 640k memory space; however, this command is only effective after loading EMM386.exe and HIMEM.sys, and not all programs are effective

Maybe the explanation from the person above is right. I often see this but don't understand it, so the impression is relatively deep. For example, the following is a part of AUTOEXEC.BAT:

PATH A:\;%RAMD%\;%RAMD%\DOS;%CDROM%:\;%PATH%

XMSDSK.exe 20480 %RAMD%\ /y /t >NUL
SET COMSPEC=%RAMD%:\COMMAND.COM >NUL
COPY EXTRACT.EXE %RAMD%\ >NUL
COPY COMMAND.COM %RAMD%\ >NUL
EXTRACT.EXE /E /Y /L %RAMD%\TRS\TRS.CAB >NUL
LH SMARTDRV.EXE 20480 >NUL
LH CTMOUSE.EXE >NUL
LH MOUSCLIP.EXE >NUL
LH DOSKEY.COM >NUL
LH DOSLFN.COM >NUL
LH ZENO.EXE >NUL
LH KILLER.EXE >NUL
EXTRACT.EXE /E /Y /L %RAMD%\NTFS\NTFS.CAB >NUL
%RAMD%\NTFS\NTFSDOS.EXE >NUL
........

Thanks for the answer from the person above.

[ Last edited by zzhh612 on 2007-4-6 at 12:14 AM ]

It is when the system boots up that it loads various drivers and programs.

Originally posted by ding520 at 2007-4-6 14:04:
It is when the system boots to load various drivers and programs.

When loading various drivers and programs, lh is not necessary.

The explanation found online is the same as what I said on the 3rd floor.

lh/loadhigh 　　 Load the program into the upper memory

　　This command is generally used in autoexec.bat. It will be useful when some software requires a large amount of basic memory.

　　lh

　　　　　　　　Load the program into the upper memory. When using this command, the following two statements need to be in the config.sys file. device=emm386.exe dos=umb

lh/loadhigh Load the resident program into the upper memory! Generally used in autoexec.bat. When some software requires a large amount of conventional memory, we call it! But before using it, the config.sys configuration file must manage the upper memory umb and the upper memory area hma. The emm386.exe program for managing the upper memory needs to be loaded.

　　　　　　　 lh [program] /l:area number 　　Load the program into the specified umb area
　　　　　　　　lh /s 　　　　　　　　　Generally dedicated by memmaker

It's really difficult. I can't understand. My English is very poor. I don't even know if I can learn DOS well.